Anirban Karmakar | Netaji Subhash Engineering College (original) (raw)
Papers by Anirban Karmakar
Polyhedron, 2008
A combined solid and solution phase methodology for the synthesis of a series of mononuclear and ... more A combined solid and solution phase methodology for the synthesis of a series of mononuclear and polynuclear zinc benzoate complexes is described. The substituent on the aromatic ring and the effect of solvent on deciding the composition of the complexes is ...
Journal of Molecular Structure, 2008
Polyhedron, 2007
... of pyromellitic dianhydride for the synthesis of first row transition metal dicarboxylate com... more ... of pyromellitic dianhydride for the synthesis of first row transition metal dicarboxylate complexes.Abhilasha M. Baruah a , Anirban Karmakar a and Jubaraj B. Baruah Corresponding Author ... The ring opening reaction of pyromellitic dianhydride by methanol is an effective method ...
Journal of Molecular Structure, 2008
Supramolecular Chemistry, 2008
Different hydrates of the receptor, N-[2-(4-methoxy-phenyl)-ethyl]-2-(quinolin-8-yloxy) acetamide... more Different hydrates of the receptor, N-[2-(4-methoxy-phenyl)-ethyl]-2-(quinolin-8-yloxy) acetamide (I), and its co-crystals with acetic acid and l (+) α-hydroxy-phenylacetic acid are synthesised and their structures are studied. The acids such as acetic acid, l (+) α-hydroxy ...
Beilstein Journal of Organic Chemistry, 2007
Inorganic Chemistry Communications, 2006
The solid state reaction between benzoic acid, potassium hydroxide and nickel chloride followed b... more The solid state reaction between benzoic acid, potassium hydroxide and nickel chloride followed by treatment with pyridine leads to a dimeric nickel complex [5] which has composition [(Ni 2 (μ-H 2 O)(μ-C 6 H 5 CO 2 ) 2 (C 5 H 5 N) 4 (C 6 H 5 CO 2 ) 2 ]. (C 7 H 8 ). (C 6 H 5 COOH) ...
Journal of Chemical Crystallography, 2010
Abstract Crystal structures of two bis-phenols namely bis-(3,5-dimethyl-2-hydroxyphenyl)(3-amino ... more Abstract Crystal structures of two bis-phenols namely bis-(3,5-dimethyl-2-hydroxyphenyl)(3-amino phenyl)methane 1 and bis-(3,5-dimethyl-4-hydroxyphenyl)(3-aminophenyl) methane 2 are determined. The compound 1 crystallises in monoclinic P21/c with a = 12.2579(16) Å, b = 16.0906(19) Å, c = 10.6664(13) Å, β = 115.417(7)°, V = 1900.2(4) Å3 whereas 2 crystallizes in monoclinic C2/c, a = 9.2538(2) Å, b = 18.6579(4) Å, c = 23.2725(5) Å, β = 98.796(2)°, V = 3970.89(15) Å3. The crystal lattice of both the compounds shows presence of N–H···π interactions but no O–H···π interactions. Graphical Abstract N–H···π interactions in bis-(3,5-dimethyl-2-hydroxyphenyl)(3-amino phenyl)methane.
Inorganica Chimica Acta, 2008
Inorganica Chimica Acta, 2009
Crystengcomm, 2009
Different types of cyclic polynuclear complexes and one-dimensional coordination polymers of zinc... more Different types of cyclic polynuclear complexes and one-dimensional coordination polymers of zinc(II) derived from (3-carboxymethoxy-naphthalen-2-yloxy)-acetic acid (LH2) are synthesised and characterised. The macrocyclic effect of ligand L leads to the formation of a ...
Journal of Chemical Crystallography, 2007
Abstract The crystal structures of four bis-phenols are reported to substantiate the fact that th... more Abstract The crystal structures of four bis-phenols are reported to substantiate the fact that the weak interactions play a major role in the crystal packing of bis-phenols. The reaction of 2,4-dimethylphenol with aldehydes such as 2-naphthaldehyde, terephthaldehyde in the presence of trifluoracetic acid gave 2-[bis(2-hydroxy 3,5-dimethylphenyl)methyl]naphthalene (1) and 4-[bis(2-hydroxy 3,5-dimethylphenyl) methyl]benzaldehyde (2), respectively. The 2-[bis-(2-hydroxy 3,5-dimethylphenyl)-methyl]naphthalene (1) crystallizes in orthorhombic, Pbca, a = 11.905(3) Å, b = 18.788(5) Å, c = 18.894(5) Å, 4-[bis(2-hydroxy 3,5-dimethylphenyl)methyl] benzaldehyde (2) in monoclinic, Cc, a = 8.880(3) Å, b = 16.394(7) Å, c = 13.700(5) Å, γ = 104.542(2)°. The reaction of 2-nitrobenzaldehyde with 2,4-dimethylphenol gave 2-benzo[c] isoxazo-3-yl 4,6-dimethylphenol (3) and its crystal parameters are orthorhombic, P212121, a = 7.737(6) Å, b = 11.885(9) Å, c = 13.336(8) Å. The reaction of 2,6-dimethylphenol with 4-nitrobenzaldehyde and 2-chlorobenzaldehyde gave bis(4-hydroxy 3,5-dimethylphenyl)(4-nitrophenyl)methane (4) and bis(4-hydroxy 3,5-dimethylphenyl)(2-chlorophenyl)methane (5), respectively. The bis(4-hydroxy 3,5dimethylphenyl)(4-nitrophenyl)methane (4) crystallizes in monoclinic, C2/c, a = 25.921(1) Å, b = 12.202(4) Å, c = 15.6084(7) Å, β = 122.172(4)°, and bis(4-hydroxy 3,5-dimethylphenyl) (2-chlorophenyl)methane crystallizes as acetonitrile solvate (5) in triclinic, P-1, a = 12.314(3) Å, b = 14.111(3) Å, c = 15.078(5) Å, α = 98.268(2)°, β = 111.268(2)°, γ = 114.304(1)˚. The unit cell of 5 contains two pairs of crystallographically unsymmetric molecules of bis-phenols. Index abstract The crystal structures of four bis-phenols are reported to substantiate the fact that the weak interactions plays a major role in crystal packing and can induce symmetry non-equivalence among bis-phenols in unit cell of bis-phenols.
European Journal of Inorganic Chemistry, 2007
We have found that the reaction of cobalt(II) chloride hexahydrate with 2-nitrobenzoic acid, sodi... more We have found that the reaction of cobalt(II) chloride hexahydrate with 2-nitrobenzoic acid, sodium hydroxide and pyridine in methanol gives complex 1 [Equation (1)], which crystallises as pink rods in the triclinic space group P (polymorph I). ... In this complex, each cobalt(II) ion is ...
Design and synthesis techniques in antenna array are based on two different types of non-uniform ... more Design and synthesis techniques in antenna array are based on two different types of non-uniform arrays. One is accomplished with the non-uniformly spaced antenna elements and the other is realized using non-uniform excitation in which the elements of the antenna array are ...
Crystengcomm, 2008
The occurrence of multiple numbers of nonsymmetrical molecules per unit cell is an important issu... more The occurrence of multiple numbers of nonsymmetrical molecules per unit cell is an important issue in crystallography1 where weak interactions2 can play an important role. Solvents play a crucial role in the crystallization process3 and inclusion of solvent/s leads to ...
The Open Inorganic Chemistry Journal, 2008
Inorganic Chemistry Communications, 2007
... The unsolvated form III is not stable in aqueous methanol it disproportionate to give mononuc... more ... The unsolvated form III is not stable in aqueous methanol it disproportionate to give mononuclear aqua (bis ... not the case with copper(II) complexes, suggesting that the size of the metal and longer ... Keeffe, NW Ockwig, HK Chae, M. Eddaoudi and J. Kim, Nature 423 (2003), p. 705. ...
Polyhedron, 2008
A combined solid and solution phase methodology for the synthesis of a series of mononuclear and ... more A combined solid and solution phase methodology for the synthesis of a series of mononuclear and polynuclear zinc benzoate complexes is described. The substituent on the aromatic ring and the effect of solvent on deciding the composition of the complexes is ...
Journal of Molecular Structure, 2008
Polyhedron, 2007
... of pyromellitic dianhydride for the synthesis of first row transition metal dicarboxylate com... more ... of pyromellitic dianhydride for the synthesis of first row transition metal dicarboxylate complexes.Abhilasha M. Baruah a , Anirban Karmakar a and Jubaraj B. Baruah Corresponding Author ... The ring opening reaction of pyromellitic dianhydride by methanol is an effective method ...
Journal of Molecular Structure, 2008
Supramolecular Chemistry, 2008
Different hydrates of the receptor, N-[2-(4-methoxy-phenyl)-ethyl]-2-(quinolin-8-yloxy) acetamide... more Different hydrates of the receptor, N-[2-(4-methoxy-phenyl)-ethyl]-2-(quinolin-8-yloxy) acetamide (I), and its co-crystals with acetic acid and l (+) α-hydroxy-phenylacetic acid are synthesised and their structures are studied. The acids such as acetic acid, l (+) α-hydroxy ...
Beilstein Journal of Organic Chemistry, 2007
Inorganic Chemistry Communications, 2006
The solid state reaction between benzoic acid, potassium hydroxide and nickel chloride followed b... more The solid state reaction between benzoic acid, potassium hydroxide and nickel chloride followed by treatment with pyridine leads to a dimeric nickel complex [5] which has composition [(Ni 2 (μ-H 2 O)(μ-C 6 H 5 CO 2 ) 2 (C 5 H 5 N) 4 (C 6 H 5 CO 2 ) 2 ]. (C 7 H 8 ). (C 6 H 5 COOH) ...
Journal of Chemical Crystallography, 2010
Abstract Crystal structures of two bis-phenols namely bis-(3,5-dimethyl-2-hydroxyphenyl)(3-amino ... more Abstract Crystal structures of two bis-phenols namely bis-(3,5-dimethyl-2-hydroxyphenyl)(3-amino phenyl)methane 1 and bis-(3,5-dimethyl-4-hydroxyphenyl)(3-aminophenyl) methane 2 are determined. The compound 1 crystallises in monoclinic P21/c with a = 12.2579(16) Å, b = 16.0906(19) Å, c = 10.6664(13) Å, β = 115.417(7)°, V = 1900.2(4) Å3 whereas 2 crystallizes in monoclinic C2/c, a = 9.2538(2) Å, b = 18.6579(4) Å, c = 23.2725(5) Å, β = 98.796(2)°, V = 3970.89(15) Å3. The crystal lattice of both the compounds shows presence of N–H···π interactions but no O–H···π interactions. Graphical Abstract N–H···π interactions in bis-(3,5-dimethyl-2-hydroxyphenyl)(3-amino phenyl)methane.
Inorganica Chimica Acta, 2008
Inorganica Chimica Acta, 2009
Crystengcomm, 2009
Different types of cyclic polynuclear complexes and one-dimensional coordination polymers of zinc... more Different types of cyclic polynuclear complexes and one-dimensional coordination polymers of zinc(II) derived from (3-carboxymethoxy-naphthalen-2-yloxy)-acetic acid (LH2) are synthesised and characterised. The macrocyclic effect of ligand L leads to the formation of a ...
Journal of Chemical Crystallography, 2007
Abstract The crystal structures of four bis-phenols are reported to substantiate the fact that th... more Abstract The crystal structures of four bis-phenols are reported to substantiate the fact that the weak interactions play a major role in the crystal packing of bis-phenols. The reaction of 2,4-dimethylphenol with aldehydes such as 2-naphthaldehyde, terephthaldehyde in the presence of trifluoracetic acid gave 2-[bis(2-hydroxy 3,5-dimethylphenyl)methyl]naphthalene (1) and 4-[bis(2-hydroxy 3,5-dimethylphenyl) methyl]benzaldehyde (2), respectively. The 2-[bis-(2-hydroxy 3,5-dimethylphenyl)-methyl]naphthalene (1) crystallizes in orthorhombic, Pbca, a = 11.905(3) Å, b = 18.788(5) Å, c = 18.894(5) Å, 4-[bis(2-hydroxy 3,5-dimethylphenyl)methyl] benzaldehyde (2) in monoclinic, Cc, a = 8.880(3) Å, b = 16.394(7) Å, c = 13.700(5) Å, γ = 104.542(2)°. The reaction of 2-nitrobenzaldehyde with 2,4-dimethylphenol gave 2-benzo[c] isoxazo-3-yl 4,6-dimethylphenol (3) and its crystal parameters are orthorhombic, P212121, a = 7.737(6) Å, b = 11.885(9) Å, c = 13.336(8) Å. The reaction of 2,6-dimethylphenol with 4-nitrobenzaldehyde and 2-chlorobenzaldehyde gave bis(4-hydroxy 3,5-dimethylphenyl)(4-nitrophenyl)methane (4) and bis(4-hydroxy 3,5-dimethylphenyl)(2-chlorophenyl)methane (5), respectively. The bis(4-hydroxy 3,5dimethylphenyl)(4-nitrophenyl)methane (4) crystallizes in monoclinic, C2/c, a = 25.921(1) Å, b = 12.202(4) Å, c = 15.6084(7) Å, β = 122.172(4)°, and bis(4-hydroxy 3,5-dimethylphenyl) (2-chlorophenyl)methane crystallizes as acetonitrile solvate (5) in triclinic, P-1, a = 12.314(3) Å, b = 14.111(3) Å, c = 15.078(5) Å, α = 98.268(2)°, β = 111.268(2)°, γ = 114.304(1)˚. The unit cell of 5 contains two pairs of crystallographically unsymmetric molecules of bis-phenols. Index abstract The crystal structures of four bis-phenols are reported to substantiate the fact that the weak interactions plays a major role in crystal packing and can induce symmetry non-equivalence among bis-phenols in unit cell of bis-phenols.
European Journal of Inorganic Chemistry, 2007
We have found that the reaction of cobalt(II) chloride hexahydrate with 2-nitrobenzoic acid, sodi... more We have found that the reaction of cobalt(II) chloride hexahydrate with 2-nitrobenzoic acid, sodium hydroxide and pyridine in methanol gives complex 1 [Equation (1)], which crystallises as pink rods in the triclinic space group P (polymorph I). ... In this complex, each cobalt(II) ion is ...
Design and synthesis techniques in antenna array are based on two different types of non-uniform ... more Design and synthesis techniques in antenna array are based on two different types of non-uniform arrays. One is accomplished with the non-uniformly spaced antenna elements and the other is realized using non-uniform excitation in which the elements of the antenna array are ...
Crystengcomm, 2008
The occurrence of multiple numbers of nonsymmetrical molecules per unit cell is an important issu... more The occurrence of multiple numbers of nonsymmetrical molecules per unit cell is an important issue in crystallography1 where weak interactions2 can play an important role. Solvents play a crucial role in the crystallization process3 and inclusion of solvent/s leads to ...
The Open Inorganic Chemistry Journal, 2008
Inorganic Chemistry Communications, 2007
... The unsolvated form III is not stable in aqueous methanol it disproportionate to give mononuc... more ... The unsolvated form III is not stable in aqueous methanol it disproportionate to give mononuclear aqua (bis ... not the case with copper(II) complexes, suggesting that the size of the metal and longer ... Keeffe, NW Ockwig, HK Chae, M. Eddaoudi and J. Kim, Nature 423 (2003), p. 705. ...