Journal ArticleDOI
Crystal structure and magnetic interactions in nickel(II) dibridged complexes formed by two azide groups or by both phenolate oxygen-azide, -thiocyanate, -carboxylate, or -cyanate groups.
Subrata Kumar Dey,Nijhuma Mondal,M. Salah El Fallah,Ramon Vicente,Albert Escuer,Xavier Solans,Mercè Font-Bardia,T. Matsushita,V. Gramlich,Samiran Mitra +9 more
TLDR
Tridentate/tetradentate Schiff base ligands L(1) and L(2), derived from the condensation of o-vanillin or pyridine-2-aldehyde with N,N-dimethylethylenediammine, react with nickel acetate or perchlorate salt and azide, cyanate, or thiocyanate to give rise to a series of dinuclear complexes.Abstract:
Tridentate/tetradentate Schiff base ligands L1 and L2, derived from the condensation of o-vanillin or pyridine-2-aldehyde with N,N-dimethylethylenediammine, react with nickel acetate or perchlorate salt and azide, cyanate, or thiocyanate to give rise to a series of dinuclear complexes of formulas [Ni(L1)(μ1,1-N3)Ni(L1)(N3)(OH2)]·H2O (1), {[Ni(L1)(μ1,1-NCS)Ni(L1)(NCS)(OH2)][Ni(L1)(μ-CH3COO)Ni(L1)( NCS) (OH2)]} (2) {[2A][2B]}, [Ni(L1)(μ1,1-NCO)Ni(L1)(NCO)(OH2)]·H2O (3), and [Ni(L2-OMe)(μ1,1-N3)(N3)]2 (4), where L1 = Me2N(CH2)2NCHC6H3(O-)(OCH3) and L2 = Me2N(CH2)2NCHC6H3N. We have characterized these complexes by analytical, spectroscopic, and variable-temperature magnetic susceptibility measurements. The coordination geometry around all of the Ni(II) centers is a distorted octahedron with bridging azide, thiocyanate/acetate, or cyanate in a μ1,1 mode and μ2-phenolate oxygen ion for 1−3, respectively, or with a double-bridging azide for 4. The magnetic properties of the complexes were studied by magnetic sus...read more
Citations
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Journal ArticleDOI
Synthesis, structures and fluorescence of nickel, zinc and cadmium complexes with the N,N,O-tridentate Schiff base N-2-pyridylmethylidene-2-hydroxy-phenylamine
TL;DR: In this paper, the trinuclear unit is held together by bridging deprotonated phenolic oxygen atoms from the Schiff base and acetate groups, and the structures of the three synthesised complexes have been determined by single-crystal X-ray diffraction.
Journal ArticleDOI
Advances in acyclic compartmental ligands and related complexes
TL;DR: In this article, the authors classified symmetric and asymmetric compartmental acyclic Schiff bases and their reduced polyamine analogues according to their synthetic procedures, i.e. the condensation ratio between the formyl (or keto) and amine precursors.
Journal ArticleDOI
Three new pseudohalide bridged dinuclear Zn(II) Schiff base complexes: Synthesis, crystal structures and fluorescence studies
Subhra Basak,Soma Sen,Sambuddha Banerjee,Samiran Mitra,Georgina M. Rosair,M.T. Garland Rodriguez +5 more
TL;DR: In this paper, three dinuclear Zn(II) complexes [Zn(L)(μ1, 1-N3)Zn (L)(N3)]· 1.5H2O (1),[Zn[L]-(OCH3)(OH)C6H3CHN(CH2)2 N(CH3)2], which is the condensation product of o-vanillin and 2-dimethylaminoethylamine have been synthesized from a potentially tetradentate N2O2-donor Schiff base
Journal ArticleDOI
The crucial role of polyatomic anions in molecular architecture: structural and magnetic versatility of five nickel(II) complexes derived from A N,N,O-donor Schiff base ligand.
TL;DR: In this article, a tridentate Schiff base ligand was used to synthesize five new nickel(II) complexes, namely, [Ni2L2N3]2(H2O)2] (1), [Ni 2L2(NO3)2], [Ni3L2O2CPh)(CH3OH)2 ]ClO4.0.5CH3H2.
Journal ArticleDOI
A Unique Example of Structural and Magnetic Diversity in Four Interconvertible Copper(II)―Azide Complexes with the Same Schiff Base Ligand: A Monomer, a Dimer, a Chain, and a Layer
Subrata Naiya,Chaitali Biswas,Chaitali Biswas,Michael G. B. Drew,Carlos J. Gómez-García,Juan M. Clemente-Juan,Ashutosh Ghosh +6 more
TL;DR: Four new Cu(II)-azido complexes have been synthesized using the same tridentate Schiff base ligand HL (2-[1-(2-dimethylaminoethylimino)ethyl]phenol, the condensation product of dmen and 2-hydroxyacetophenone) and can be obtained in pure form by carefully controlling the conditions.
References
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