Synthesis and characterization of a new Schiff base ligand derived from benzo-15- crown-5 and its complexes with cobalt(II), nickel(II) and copper(II) (original) (raw)
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The reaction between benzil and hexamethylenediamine formed a new ligand [L], [(1Z,3Z)-2,3diphenyl-5,6,7,8,9,10-hexahydro-1,4-diazecine], of the type [N2], was synthesized by the condensation reaction through Schiff base reaction between benzil and hexamethylenediamine. The new Schiff base ligand reacts with Mn п , Ni п and Co п metal ions to give the complexes with the general formula: [M(L)Cl2]. The elemental investigations have been used to analyze the ligand and its complexes by CHN, FT-IR, UV-Vis, TLC, mass spectrum, melting point with the study of biological activity to the formed compounds. From the data obtained, the proposed molecular structure adopts square planar structure about the metal ions. The study reveals the formation of a new ligand type [N2] and it's metal ion complexes with square planar structures metal:ligand ratio of 1:1, which can be employed in a variety of fields such as medicine and industry.
JOURNAL OF SCIENTIFIC RESEARCH
New series of coordination compounds of some transition metal ions [Zr(IV), Co(II), Cu(II)] of synthesized ligand (4-[2{5-[4-Nitrobenzylidene)-amino]-[1,3,4]thiadiazole-2yl}phenylimino)-methyl]-phenol. These new prepared metal complexes and Schiff base ligand were characterised by elemental microanalysis (CHNSO), FTIR, UV-Vis, 1 H-NMR, thermal analysis (TGA-DTA), magnetic susceptibility and molar conductance. Accordance to the obtained data all the prepared complexes were non-electrolytic. On the basis of the instrumental results, structures of metal complexes have been proposed. From the spectral data it is revealed that all prepared complexes exhibit 2:1 (ligand: metal) ratio. Thermal data shows degradation of these complexes.
Synthesis and structure of some novel Schiff base complexes with CuII and NiII
2011
Bioinorganic Research Laboratories, Department of Chemistry, Dr. H. S. Gour University,<br> Sagar-470 003, Madhya Pradesh, India<br> E-mail : apm19@rediffmail.com<br> Mauuscript received 15 June 2010, revised 31 January 2011, accepted 02 February 2011 The chemistry of metal complexes with tailor made Schiff base ligands and their applications, have arou~ed<br> considerable interest mainly because of preparative accessibility, diverse reactivity and structural variability. Complexes<br> of Nill and Cu11 with the Schiff bases viz. 3,4-dichloroaniline with 2-furfuraldehyde/4-dimethylaminobenzaldehyde and<br> 3-chloro-4-fluoroaniline with 4-dimethylaminobenzaldehyde have been synthesized. Physico-chemical characterization of<br> the complexes have been done with the help of micro-analytical data, UV-Vis, FT-IR, ESR spectroscopy, molar conductance,<br> thermal analysis, F AB-mass and magnetic susceptibility measurements. F AB-mass and therm...
Synthesis and characterisation of a new Schiff base and its metal complexes
A new Schiff base ligand, 2-(6-((E)-1-(2-heptadecylcarbonyl-oxyphenyl)methylideneamino) [1,10] phenanthrolin-5-yl-imino-methyl)phenyl stearate has been synthesised from the reaction of 5,6-bis(salicylideneimino)-1,10-phenanthroline with stearic acid. The ligand reacts with Co(II), Ni(II) and Cu(II) salts to form complexes. The ligand has been characterized by FTIR, 1 H NMR (DMSO-d 6), UV-vis and mass spectra, elemental analysis and fluorescence spectrophotometry. Protonation constants of the ligand and overall formation constants of the complexes have been calculated from potentiometric data using a computer program. IPC Code: Int. Cl. 8 C07F1/08; C07F15/04; C07F15/06 The coordination chemistry of Schiff bases derived from the reaction of salicylaldehyde and o-diamines has been the subject of many studies and a number of them are used as oxygen carriess to mimic compli-cated biological systems 1-7 . They are also efficient reagents in trace analysis of some metal cations 8 . Schiff ...
Sadu Suryakant s
New Schiff base transition metal complexes have been synthesized via the condensation of 3-amino-5-bro-mobenzofuran-2-carboxamide and Salicylaldehyde. Tentative structures for the synthesized complexes have been elucidated on the basis of analytical, elemental, UV-VIS, IR, 1HNMR, ESR and Mass spectral studies. All the complexes are soluble in DMF and DMSO. The measured molar conductance values suggest that the complexes are non-electrolytic in nature. We propose the octahedral geometry for Co(II), Ni(II) and Cu(II) complexes, based on electronic spectral data, magnetic data and ligand field parameters. The Cd(II), Zn(II) & Hg(II) complexes show the tetrahedral geometry. The Schiff base and their metal complexes were screened for their anti-bacterial, anti-fungal and DNA cleavage activities.
International Journal of Science and Research Archive, 2022
The direct reaction of 4-(methylthio) benzaldehyde with Napthofuran-2-carbohydrazide generated a new heterocyclic Schiff base ligand and its transition metal (II) complexes with the formula ML2Cl2, where M= Co, Ni, Cu, Zn, Cd, and Hg. Analytical, Infrared, 1 HNMR, Mass, and UV-Visible spectral information have been used to perform a basic structural interpretation of the ligand and metal complexes.
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Bu calismada, bir yeni Schiff bazi ligandi ve onun gecis metal kompleksleri sentezlenmistir. K omplekslerde Schiff bazlarinin metal iyonuna imin azotu ve fenolik oksijeninden baglanarak iki disli selat olarak davrandigi bulunmustur. Metal-ligand orani, tum kompleksler icin 1: 2 bulundu. Co (II), Ni (II), Cu (II) ve Zn (II) kompleksleri tetrahedral geometriye sahiptir. Komplekslerin formulleri [M(L) 2 ] oldugu bulunmustur. Bilesiklerin yapilari elemental analiz, IR, 1 H- ve 13 C-NMR ve UV spektroskopisi, manyetik duyarlilik olcumleri kullanilarak karakterize edildi. Ek olarak, ligand ve komplekslerinin termal karakterizasyonu TGA teknigi kullanilarak gerceklestirildi.