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Metal complexes of 2-(2'-or 8'-quinolyl)benzimidazoles and benzothiazoles

Massacesi, Marcella and Pinna, Rosalba and Micera, Giovanni and Strinna Erre, Liliana and Savarino, Piero (1988) Metal complexes of 2-(2'-or 8'-quinolyl)benzimidazoles and benzothiazoles. Transition Metal Chemistry, Vol. 13 (2), p. 116-119. eISSN 1572-901X. Article.

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DOI: 10.1007/BF01087801

Abstract

The copper(II), cobalt(II) and nickel(II) chloride and bromide complexes with the ligands 2-(2'-quinolyl)-benzimidazole (qbi), 2-(4'-methyl-2'-quinolyl)benzimidazole (mqbi), 2-(4'-methyl-8'-quinolyl)benzothiazole (m'q'bt) have been prepared and characterized by analytical methods, magnetic measurements as well as by electronic absorption, e.s.r. and far i.r. spectra. Complexes of various stoichiometries have been isolated, namely MLX2 (all cobalt complexes with exception of the bromide qbi complex; the chloride and bromide nickel m'q'bt and mq'bt complexes), ML2X2 (M=Co,L=qbi and X=Br; M=Ni, L=mqbi, X=Cl or Br, M=Ni, L=qbi, X=Cl) and ML3X2(M=Ni, L=qbi or mqbi, X=Br). The cobalt ion has a distorted tetrahedral N2X2 coordination in all the CoLX2 complexes, whereas Co(qbi)2Br2 is six-coordinate. The following conclusions may be drawn for the nickel complexes: in those with the 1:1 metal-to-ligand molar ratio the metal ion is four-or five-coordinate; in those with the 1:2 and 1:3 ratios the metal ion is hexa-coordinate, being essentially bound to four nitrogen atoms with halogens, oxygens from water or methanol or nitrogen atoms (from the third ligand) occupying the axial positions.

Item Type:Article
ID Code:1440
Status:Published
Refereed:Yes
Uncontrolled Keywords:Metal complexes, 2-(2'-or 8'-quinolyl)benzimidazoles, 2-(4'-methyl-8'-quinolyl)benzothiazole
Subjects:Area 03 - Scienze chimiche > CHIM/03 Chimica generale e inorganica
Divisions:001 Università di Sassari > 01 Dipartimenti > Chimica
Publisher:Springer Netherlands
eISSN:1572-901X
Deposited On:18 Aug 2009 10:05

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