Synthesis, characterization and crystal structures of some four coordinated nickel(II) complexes with tridentate Schiff base ligands

A number of Ni(II) complexes with tridentate Schiff base ligands with a N 2O donor set and coordinating NNN − and SCN − anions have been synthesized and characterized by analytical, spectroscopic and electrochemical techniques. X-ray structure analyses of three of these complexes [L 1Ni(NNN)] ( 1),...

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Bibliographic Details
Published in:Polyhedron 2001, Vol.20 (1), p.135-141
Main Authors: Mondal, Nijhuma, Mitra, Samiran, Gramilich, Volker, Ozra Ghodsi, S., Abdul Malik, K.M.
Format: Article
Language:English
Subjects:
Azide
Crystal structures
Nickel
Schiff base ligands
Thiocyanate
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Summary:A number of Ni(II) complexes with tridentate Schiff base ligands with a N 2O donor set and coordinating NNN − and SCN − anions have been synthesized and characterized by analytical, spectroscopic and electrochemical techniques. X-ray structure analyses of three of these complexes [L 1Ni(NNN)] ( 1), [L 2Ni(NNN)] ( 2) and [L 3Ni(NCS)] ( 6) [HL 1=Me 2NCH 2CH 2N(Me)C 6H 4OH, HL 2=Et 2NCH 2CH 2N(H)C 6H 4OH, HL 3=Et 2NCH 2CH 2N(H)C 6H 3BrOH] show that the nickel atom has a square planar geometry. Thermogravimetric studies show multiple step decomposition, and electrochemical studies indicate that the complexes are irreversibly oxidized to Ni(III) species, which are unstable and undergo rapid decomposition.
ISSN:0277-5387
DOI:10.1016/S0277-5387(00)00601-X