Praveen Tandon | University of Allahabad (original) (raw)
Papers by Praveen Tandon
Abstract: Potential of rhodium(III) chloride in catalyzing, in aqueous sulfuric acid medium, the ... more Abstract: Potential of rhodium(III) chloride in catalyzing, in aqueous sulfuric acid medium, the oxidation of vicinal diols, and the kinetics of reaction of cerium(IV) with propane-1,2-diol and butane-2,3-diol catalyzed by rhodium(III) chloride was investigated. Data show that the reactions follow first order kinetics with respect to low cerium(IV) for lower concentrations, but a further increase in the oxidant concentration retards the reaction velocity. The reaction rate shows direct proportionality with respect to low concentrations of diol, which tends to become zero order at higher concentrations of the organic substrate. The Rate is first order in catalyst. Increase in the concentrations of hydrogen and cerium(III) ions show retarding effects while increase in chloride ion concentration and in turn ionic strength of the medium has a positive effect on the rate. Stoichiometry and spectral studies confirmed the formation of one molecule each of formaldehyde and acetaldehyde and ...
Handbook of Nanomaterials and Nanocomposites for Energy and Environmental Applications, 2021
On reducing dimension(s) to the nanometer scale, properties of materials change in a fascinating ... more On reducing dimension(s) to the nanometer scale, properties of materials change in a fascinating way. The quantum confinement effect leads to discretization of energy levels which depends on the confinement size of the material. Depending on the degree of quantization, the resulting structure shows optoelectronic,
Acta Chimica Slovenica, 2021
Montmorillonite K10 (MMT K10) supported copper oxide nanoparticles (CuONPs) were synthesized by i... more Montmorillonite K10 (MMT K10) supported copper oxide nanoparticles (CuONPs) were synthesized by incorporating CuONPs onto the surface of MMT K10 by reducing the metal precursor with the help of hydrazine hydrate. Effects of various factors on the efficiency of composite to remove hexavalent chromium were studied to find out the optimum conditions for maximum removal. Under optimum conditions 15 mg of the synthesized nanocomposite was found capable to almost completely remove (99.9%) hexavalent chromium in 30 min from a 10 ppm aqueous chromium solution and that too in a wide range of pH from 2.88 to 5.56. The synthesized MMT K10 supported CuONPs were characterized by UV, SEM-EDX, FTIR and XRD studies. The average particle size of supported CuONPs was found to be 22.9 nm. Antibacterial potential of the prepared composite was also studied for one Gram-positive bacterium Staphylococcus aureus (ATCC 25323) and one Gram-negative bacterium Pseudomonas aeruginosa (ATCC 27853). The prepared ...
Green Chemistry & Technology Letters, 2016
Water is an essential resource for all the organisms, plants and animals including the human bein... more Water is an essential resource for all the organisms, plants and animals including the human beings. It is the backbone for agricultural and industrial sectors and all the small business units. Increase in human population and economic activities have tremendously increased the demand for large-scale suppliers of fresh water for various competing end users.The quality evaluation of water is represented in terms of physical, chemical and Biological parameters. A particular problem in the case of water quality monitoring is the complexity associated with analyzing the large number of measured variables. The data sets contain rich information about the behavior of the water resources. Multivariate statistical approaches allow deriving hidden information from the data sets about the possible influences of the environment on water quality. Classification, modeling and interpretation of monitored data are the most important steps in the assessment of water quality. The application of diff...
Hydrogen Production and Remediation of Carbon and Pollutants, 2015
For life sustainability water is an essential resource present on the earth. In the current era o... more For life sustainability water is an essential resource present on the earth. In the current era of economical growth, groundwater is getting polluted due to the various human activities, urbanization and industrialization in addition to geogenic contamination. Water contamination by toxic and hazardous heavy metals, inorganic and organic pollutants, is a widespread environmental problem and removal of these pollutants from contaminated water is a major scientific concern of research and development. Water remediation technology is the process that is used to remove various pollutants from contaminated water. Various remediation techniques such as ultrasonication, bioremediation and nano are used for water remediation. Redox processes are chemical reactions that proceed by transfer of electrons resulting in a change in oxidation state of elements that are either oxidized to a higher oxidation state or reduced to a lower oxidation state. The use of redox processes in water remediation technologies has not been properly reviewed till now even after its versatile applications in water remediation technologies. The chemical speciation, bioavailability, toxicity, mobility and suitability for biodegradation as well as adsorption for water pollutants in environment are directly affected by redox processes that occur in water.
The Open Catalysis Journal, 2009
Oxidation of benzyl alcohol by cerium(IV) sulphate catalyzed by iridium(III) chloride was studied... more Oxidation of benzyl alcohol by cerium(IV) sulphate catalyzed by iridium(III) chloride was studied both from the kinetic and synthetic point of views. In the kinetic study reaction followed direct proportionality with respect to catalyst concentrations while first order kinetics at low concentrations becoming to zero order at higher concentrations of both oxidant and organic substrate was observed. Rate decreases sharply with increasing concentrations of H + , Ce III and Clions. Potential of cerium(IV)-iridium(III) system in synthesis was checked by changing the concentrations or conditions of various factors, which affect the yield of benzaldehyde. After a certain point increase in the duration of experiment or the concentration of oxidant and catalyst does not increase the yield and under the experimental conditions it was only the temperature, which may further increase the yield. Product was identified by various means.
Department of Chemistry, University of Allahabad, Allahabad-211 002, Uttar. Pradesh, India <em... more Department of Chemistry, University of Allahabad, Allahabad-211 002, Uttar. Pradesh, India <em>E-mail </em>: pktandon123@rediffmail.com <em>Manuscript received online 15 December 2012, revised 30 January 2013, accepted 07 February 2013</em> Oxidation of 2-phenyl ethanol and 2-methyl cyclohexanol by cerium(IV) sulphate in aqueous sulphuric acid medium is greatly enhanced by iridium(III) chloride. Catalyst combines with the complex formed between cerium(Iv) and organic substrate and ultimately gives rise to corresponding aromatic dicarboxylic acids as the product of oxidation. Reactions follows direct proportionality with respect to catalyst concentrations while the first order kinetics shown by the oxidant and organic substrate at their low concentrations become zero order at higher concentrations of both oxidant and organic substrate. Rate decreased with increasing concentrations of H<sup>+</sup> ions. Externally added Ce<sup>III </sup>...
Transition Metal …, 2011
Page 1. Oxidation of butane-1,3-, butane-1,4-, 2-methyl pentane-2,4-and 3-methyl pentane-2,4-diol... more Page 1. Oxidation of butane-1,3-, butane-1,4-, 2-methyl pentane-2,4-and 3-methyl pentane-2,4-diols by cerium(IV) in aqueous acidic medium catalyzed by rhodium(III) Praveen K. Tandon Shaista Z. Khanam Suresh C. Yadav Ritesh C. Shukla ...
Green Chemistry & Technology Letters
Presence of microscopic algae can cause taste and odour problems, water discoloration, or form la... more Presence of microscopic algae can cause taste and odour problems, water discoloration, or form large mats that can interfere with boating, swimming, and fishing. The present study was conducted to assess the phytoplankton assemblages which in turn can serve as a suitable method to assess the quality of river ecosystem. Diversity of phytoplankton in river Ganga in Allahabad at five sampling stations was conducted from March to April 2014. Plankton identified in the river mainly composed of the members of Bacillariophyceae, Chlorophyceae and Cyanophyceae families.The Palmer pollution index values were calculated to know the level of organic pollution and to support the data. On the basis of quantitative and qualitative estimates 15 significant algal species were identified which can tolerate high degree of pollution. The abundance of phytoplanktons in april was greater than in march. Abundance of phytoplanktons and algal bloom was maximum at Chhatnag ghat whereas at Sangam low phytopl...
Green Chemistry & Technology Letters
Drinking water sources are regularly polluted by various human activities that cuase sever health... more Drinking water sources are regularly polluted by various human activities that cuase sever health problem all over the world. In recent years, water quality research has drawn great attention of scientific communities. A lot number of tools and techniques are used for proper water quality analysis, monitoring and assessment. This paper includes brief information about some of the them namely, physio-chemical water analysis (PCWA), adsorption, metal pollution index (MPI), water quality index (WQI), water quality modelling tools (WQMT) and multivariable statistical models that includes five multivariate data mining approaches i.e. cluster analysis (CA), principal component analysis (PCA), factor analysis (FA), multiple linear regression analysis (MLRA), discriminant analysis (DA). Present paper also explores the interaction between science and technologies and provides basic knowledge of emerging tools and techniques used in water purification.
Chemical Science Transactions, 2012
Groundwater samples of bore wells (BW), open wells (OW), Hand Pumps (HP), lakes, falls and stream... more Groundwater samples of bore wells (BW), open wells (OW), Hand Pumps (HP), lakes, falls and streams collected from different locations in Yercaud Taluk in Salem District, Tamil Nadu were analyzed for their physicochemical characteristics. The ground water samples were studied during pre-monsoon (June-July 2010) and post-monsoon (December 2010-January 2011) seasons from 25 different villages. The present study was undertaken to characterize the physicochemical parameters such as temperature, pH, Total Alkalinity (TA), Electrical Conductivity (EC), salinity, Calcium Hardness (CH), Magnesium Hardness (MH), Total Hardness (TH), Total Dissolved Solids (TDS), Total Suspended Solids (TSS), Total Solids (TS) and fluoride. Each parameter was compared with its standard permissible limit as prescribed by World Health Organization (WHO). The Water Quality Index (WQI) reflected that most of the samples are of good and excellent quality. The Karl Pearson Correlation matrix has approved the influence of CH on EC, Salinity and TDS with significantly positive correlation. The study reveals that all the villages have hardness within the desirable limit prescribed by WHO.
The Open Catalysis Journal, 2013
The reaction between KI and [Fe(CN) 6 ] 3) ion, catalysed by hydrogen ions, was found to be catal... more The reaction between KI and [Fe(CN) 6 ] 3) ion, catalysed by hydrogen ions, was found to be catalysed further by PdCl 2. Separate reactions under similar conditions, studied in the absence as well as in the presence of PdCl 2 catalyst, were found to follow first order kinetics w.r. to [Fe(CN) 6 ] 3) and [H + ], while the order was two w.r. to [I) ]. [Fe(CN) 6 ] 4) ions were found to have a negative effect while changes in ionic strength of the medium do not effect the reaction velocity. Reaction in the presence of PdCl 2 showed direct proportionality w.r. to [PdCl 2 ]. The rate and extent of the reaction, which takes place even at zero [PdCl 2 ] in the co-catalysed reaction, was calculated and was found to be in accordance with the rate values of the separately studied reaction at similar concentrations without adding PdCl 2 .
… journal of chemical …, 2004
Transition metals like osmium 1, iridium 2, tungsten 3, etc. have successfully been used as homog... more Transition metals like osmium 1, iridium 2, tungsten 3, etc. have successfully been used as homogeneous catalysts. Osmium is injurious in acidic medium; therefore, ruthenium 25 compounds were preferred and their catalytic activities were widely studied in acidic 2, 3 and alkaline 4, 5 media. The ...
Journal of the Indian Chemical Society, 1990
Transition Metal Chemistry, Nov 14, 2008
ABSTRACT
Journal of Molecular Catalysis a Chemical, May 1, 2009
Iridium(III) chloride catalyzed oxidation of toluene and ethyl benzene by cerium(IV) sulphate in ... more Iridium(III) chloride catalyzed oxidation of toluene and ethyl benzene by cerium(IV) sulphate in aqueous sulphuric acid medium was studied. Change in the concentration of oxidant shows a specific effect that the rate increases in the beginning at low concentrations, it reaches to a maximum and further increase in oxidant concentration decreases the rate. Oxidation was highly selective as it oxidizes toluene to benzaldehyde and ethyl benzene acetophenone. It is proposed that the complex formed between cerium(IV) and the organic substrate in first equilibrium step gives another complex in the presence of iridium(III) which ultimately gives rise to products of oxidation. Order of the reaction follows first order kinetics at low concentrations tending to become zero order at higher concentrations of organic substrate in both the cases. Rate of the reaction follows direct proportionality with respect to catalyst concentrations, while the rate decreases sharply with increasing hydrogen ion and cerium(III) concentrations. Change in ionic strength of the medium and the effects of changing concentrations of acetic acid, Cl − ions, and HSO 4 − ions on the rate were studied. Energy of activation, free energy of activation and entropy parameters were also calculated.
Journal of Molecular Catalysis a Chemical, Mar 18, 2009
The kinetics of the reaction between cyclopentanone and cyclohexanone with hexacyanoferrate(III) ... more The kinetics of the reaction between cyclopentanone and cyclohexanone with hexacyanoferrate(III) ion catalyzed by rhodium(III) chloride in alkaline medium has been investigated at four temperatures. The data show that the reaction follows first order kinetics with ...
Journal of Molecular Catalysis a Chemical, Apr 2, 2008
Apart from being an efficient catalyst in acidic medium iridium trichloride, was found to change ... more Apart from being an efficient catalyst in acidic medium iridium trichloride, was found to change order of the reaction with respect to cerium(IV) sulphate concentrations in the oxidation of p-methoxy benzaldehyde in aqueous acidic medium. Cerium(IV) and organic substrate form ...
Environmental Chemistry Letters, 2015
Abstract: Potential of rhodium(III) chloride in catalyzing, in aqueous sulfuric acid medium, the ... more Abstract: Potential of rhodium(III) chloride in catalyzing, in aqueous sulfuric acid medium, the oxidation of vicinal diols, and the kinetics of reaction of cerium(IV) with propane-1,2-diol and butane-2,3-diol catalyzed by rhodium(III) chloride was investigated. Data show that the reactions follow first order kinetics with respect to low cerium(IV) for lower concentrations, but a further increase in the oxidant concentration retards the reaction velocity. The reaction rate shows direct proportionality with respect to low concentrations of diol, which tends to become zero order at higher concentrations of the organic substrate. The Rate is first order in catalyst. Increase in the concentrations of hydrogen and cerium(III) ions show retarding effects while increase in chloride ion concentration and in turn ionic strength of the medium has a positive effect on the rate. Stoichiometry and spectral studies confirmed the formation of one molecule each of formaldehyde and acetaldehyde and ...
Handbook of Nanomaterials and Nanocomposites for Energy and Environmental Applications, 2021
On reducing dimension(s) to the nanometer scale, properties of materials change in a fascinating ... more On reducing dimension(s) to the nanometer scale, properties of materials change in a fascinating way. The quantum confinement effect leads to discretization of energy levels which depends on the confinement size of the material. Depending on the degree of quantization, the resulting structure shows optoelectronic,
Acta Chimica Slovenica, 2021
Montmorillonite K10 (MMT K10) supported copper oxide nanoparticles (CuONPs) were synthesized by i... more Montmorillonite K10 (MMT K10) supported copper oxide nanoparticles (CuONPs) were synthesized by incorporating CuONPs onto the surface of MMT K10 by reducing the metal precursor with the help of hydrazine hydrate. Effects of various factors on the efficiency of composite to remove hexavalent chromium were studied to find out the optimum conditions for maximum removal. Under optimum conditions 15 mg of the synthesized nanocomposite was found capable to almost completely remove (99.9%) hexavalent chromium in 30 min from a 10 ppm aqueous chromium solution and that too in a wide range of pH from 2.88 to 5.56. The synthesized MMT K10 supported CuONPs were characterized by UV, SEM-EDX, FTIR and XRD studies. The average particle size of supported CuONPs was found to be 22.9 nm. Antibacterial potential of the prepared composite was also studied for one Gram-positive bacterium Staphylococcus aureus (ATCC 25323) and one Gram-negative bacterium Pseudomonas aeruginosa (ATCC 27853). The prepared ...
Green Chemistry & Technology Letters, 2016
Water is an essential resource for all the organisms, plants and animals including the human bein... more Water is an essential resource for all the organisms, plants and animals including the human beings. It is the backbone for agricultural and industrial sectors and all the small business units. Increase in human population and economic activities have tremendously increased the demand for large-scale suppliers of fresh water for various competing end users.The quality evaluation of water is represented in terms of physical, chemical and Biological parameters. A particular problem in the case of water quality monitoring is the complexity associated with analyzing the large number of measured variables. The data sets contain rich information about the behavior of the water resources. Multivariate statistical approaches allow deriving hidden information from the data sets about the possible influences of the environment on water quality. Classification, modeling and interpretation of monitored data are the most important steps in the assessment of water quality. The application of diff...
Hydrogen Production and Remediation of Carbon and Pollutants, 2015
For life sustainability water is an essential resource present on the earth. In the current era o... more For life sustainability water is an essential resource present on the earth. In the current era of economical growth, groundwater is getting polluted due to the various human activities, urbanization and industrialization in addition to geogenic contamination. Water contamination by toxic and hazardous heavy metals, inorganic and organic pollutants, is a widespread environmental problem and removal of these pollutants from contaminated water is a major scientific concern of research and development. Water remediation technology is the process that is used to remove various pollutants from contaminated water. Various remediation techniques such as ultrasonication, bioremediation and nano are used for water remediation. Redox processes are chemical reactions that proceed by transfer of electrons resulting in a change in oxidation state of elements that are either oxidized to a higher oxidation state or reduced to a lower oxidation state. The use of redox processes in water remediation technologies has not been properly reviewed till now even after its versatile applications in water remediation technologies. The chemical speciation, bioavailability, toxicity, mobility and suitability for biodegradation as well as adsorption for water pollutants in environment are directly affected by redox processes that occur in water.
The Open Catalysis Journal, 2009
Oxidation of benzyl alcohol by cerium(IV) sulphate catalyzed by iridium(III) chloride was studied... more Oxidation of benzyl alcohol by cerium(IV) sulphate catalyzed by iridium(III) chloride was studied both from the kinetic and synthetic point of views. In the kinetic study reaction followed direct proportionality with respect to catalyst concentrations while first order kinetics at low concentrations becoming to zero order at higher concentrations of both oxidant and organic substrate was observed. Rate decreases sharply with increasing concentrations of H + , Ce III and Clions. Potential of cerium(IV)-iridium(III) system in synthesis was checked by changing the concentrations or conditions of various factors, which affect the yield of benzaldehyde. After a certain point increase in the duration of experiment or the concentration of oxidant and catalyst does not increase the yield and under the experimental conditions it was only the temperature, which may further increase the yield. Product was identified by various means.
Department of Chemistry, University of Allahabad, Allahabad-211 002, Uttar. Pradesh, India <em... more Department of Chemistry, University of Allahabad, Allahabad-211 002, Uttar. Pradesh, India <em>E-mail </em>: pktandon123@rediffmail.com <em>Manuscript received online 15 December 2012, revised 30 January 2013, accepted 07 February 2013</em> Oxidation of 2-phenyl ethanol and 2-methyl cyclohexanol by cerium(IV) sulphate in aqueous sulphuric acid medium is greatly enhanced by iridium(III) chloride. Catalyst combines with the complex formed between cerium(Iv) and organic substrate and ultimately gives rise to corresponding aromatic dicarboxylic acids as the product of oxidation. Reactions follows direct proportionality with respect to catalyst concentrations while the first order kinetics shown by the oxidant and organic substrate at their low concentrations become zero order at higher concentrations of both oxidant and organic substrate. Rate decreased with increasing concentrations of H<sup>+</sup> ions. Externally added Ce<sup>III </sup>...
Transition Metal …, 2011
Page 1. Oxidation of butane-1,3-, butane-1,4-, 2-methyl pentane-2,4-and 3-methyl pentane-2,4-diol... more Page 1. Oxidation of butane-1,3-, butane-1,4-, 2-methyl pentane-2,4-and 3-methyl pentane-2,4-diols by cerium(IV) in aqueous acidic medium catalyzed by rhodium(III) Praveen K. Tandon Shaista Z. Khanam Suresh C. Yadav Ritesh C. Shukla ...
Green Chemistry & Technology Letters
Presence of microscopic algae can cause taste and odour problems, water discoloration, or form la... more Presence of microscopic algae can cause taste and odour problems, water discoloration, or form large mats that can interfere with boating, swimming, and fishing. The present study was conducted to assess the phytoplankton assemblages which in turn can serve as a suitable method to assess the quality of river ecosystem. Diversity of phytoplankton in river Ganga in Allahabad at five sampling stations was conducted from March to April 2014. Plankton identified in the river mainly composed of the members of Bacillariophyceae, Chlorophyceae and Cyanophyceae families.The Palmer pollution index values were calculated to know the level of organic pollution and to support the data. On the basis of quantitative and qualitative estimates 15 significant algal species were identified which can tolerate high degree of pollution. The abundance of phytoplanktons in april was greater than in march. Abundance of phytoplanktons and algal bloom was maximum at Chhatnag ghat whereas at Sangam low phytopl...
Green Chemistry & Technology Letters
Drinking water sources are regularly polluted by various human activities that cuase sever health... more Drinking water sources are regularly polluted by various human activities that cuase sever health problem all over the world. In recent years, water quality research has drawn great attention of scientific communities. A lot number of tools and techniques are used for proper water quality analysis, monitoring and assessment. This paper includes brief information about some of the them namely, physio-chemical water analysis (PCWA), adsorption, metal pollution index (MPI), water quality index (WQI), water quality modelling tools (WQMT) and multivariable statistical models that includes five multivariate data mining approaches i.e. cluster analysis (CA), principal component analysis (PCA), factor analysis (FA), multiple linear regression analysis (MLRA), discriminant analysis (DA). Present paper also explores the interaction between science and technologies and provides basic knowledge of emerging tools and techniques used in water purification.
Chemical Science Transactions, 2012
Groundwater samples of bore wells (BW), open wells (OW), Hand Pumps (HP), lakes, falls and stream... more Groundwater samples of bore wells (BW), open wells (OW), Hand Pumps (HP), lakes, falls and streams collected from different locations in Yercaud Taluk in Salem District, Tamil Nadu were analyzed for their physicochemical characteristics. The ground water samples were studied during pre-monsoon (June-July 2010) and post-monsoon (December 2010-January 2011) seasons from 25 different villages. The present study was undertaken to characterize the physicochemical parameters such as temperature, pH, Total Alkalinity (TA), Electrical Conductivity (EC), salinity, Calcium Hardness (CH), Magnesium Hardness (MH), Total Hardness (TH), Total Dissolved Solids (TDS), Total Suspended Solids (TSS), Total Solids (TS) and fluoride. Each parameter was compared with its standard permissible limit as prescribed by World Health Organization (WHO). The Water Quality Index (WQI) reflected that most of the samples are of good and excellent quality. The Karl Pearson Correlation matrix has approved the influence of CH on EC, Salinity and TDS with significantly positive correlation. The study reveals that all the villages have hardness within the desirable limit prescribed by WHO.
The Open Catalysis Journal, 2013
The reaction between KI and [Fe(CN) 6 ] 3) ion, catalysed by hydrogen ions, was found to be catal... more The reaction between KI and [Fe(CN) 6 ] 3) ion, catalysed by hydrogen ions, was found to be catalysed further by PdCl 2. Separate reactions under similar conditions, studied in the absence as well as in the presence of PdCl 2 catalyst, were found to follow first order kinetics w.r. to [Fe(CN) 6 ] 3) and [H + ], while the order was two w.r. to [I) ]. [Fe(CN) 6 ] 4) ions were found to have a negative effect while changes in ionic strength of the medium do not effect the reaction velocity. Reaction in the presence of PdCl 2 showed direct proportionality w.r. to [PdCl 2 ]. The rate and extent of the reaction, which takes place even at zero [PdCl 2 ] in the co-catalysed reaction, was calculated and was found to be in accordance with the rate values of the separately studied reaction at similar concentrations without adding PdCl 2 .
… journal of chemical …, 2004
Transition metals like osmium 1, iridium 2, tungsten 3, etc. have successfully been used as homog... more Transition metals like osmium 1, iridium 2, tungsten 3, etc. have successfully been used as homogeneous catalysts. Osmium is injurious in acidic medium; therefore, ruthenium 25 compounds were preferred and their catalytic activities were widely studied in acidic 2, 3 and alkaline 4, 5 media. The ...
Journal of the Indian Chemical Society, 1990
Transition Metal Chemistry, Nov 14, 2008
ABSTRACT
Journal of Molecular Catalysis a Chemical, May 1, 2009
Iridium(III) chloride catalyzed oxidation of toluene and ethyl benzene by cerium(IV) sulphate in ... more Iridium(III) chloride catalyzed oxidation of toluene and ethyl benzene by cerium(IV) sulphate in aqueous sulphuric acid medium was studied. Change in the concentration of oxidant shows a specific effect that the rate increases in the beginning at low concentrations, it reaches to a maximum and further increase in oxidant concentration decreases the rate. Oxidation was highly selective as it oxidizes toluene to benzaldehyde and ethyl benzene acetophenone. It is proposed that the complex formed between cerium(IV) and the organic substrate in first equilibrium step gives another complex in the presence of iridium(III) which ultimately gives rise to products of oxidation. Order of the reaction follows first order kinetics at low concentrations tending to become zero order at higher concentrations of organic substrate in both the cases. Rate of the reaction follows direct proportionality with respect to catalyst concentrations, while the rate decreases sharply with increasing hydrogen ion and cerium(III) concentrations. Change in ionic strength of the medium and the effects of changing concentrations of acetic acid, Cl − ions, and HSO 4 − ions on the rate were studied. Energy of activation, free energy of activation and entropy parameters were also calculated.
Journal of Molecular Catalysis a Chemical, Mar 18, 2009
The kinetics of the reaction between cyclopentanone and cyclohexanone with hexacyanoferrate(III) ... more The kinetics of the reaction between cyclopentanone and cyclohexanone with hexacyanoferrate(III) ion catalyzed by rhodium(III) chloride in alkaline medium has been investigated at four temperatures. The data show that the reaction follows first order kinetics with ...
Journal of Molecular Catalysis a Chemical, Apr 2, 2008
Apart from being an efficient catalyst in acidic medium iridium trichloride, was found to change ... more Apart from being an efficient catalyst in acidic medium iridium trichloride, was found to change order of the reaction with respect to cerium(IV) sulphate concentrations in the oxidation of p-methoxy benzaldehyde in aqueous acidic medium. Cerium(IV) and organic substrate form ...
Environmental Chemistry Letters, 2015