Coordination behavior of three geometric isomers of indole-based s-benzyldithiocarbazone ligands towards nickel, zinc and cadmium divalent ions

Khaledi, H. and Olmstead, M.M. and Ali, Hapipah Mohd (2011) Coordination behavior of three geometric isomers of indole-based s-benzyldithiocarbazone ligands towards nickel, zinc and cadmium divalent ions. Inorganica Chimica Acta, 366 (1). pp. 233-240. ISSN 0020-1693

Full text not available from this repository. (Request a copy)
Official URL: http://www.sciencedirect.com/science/article/pii/S...

Abstract

Three indolyl-imine ligands have been synthesized through the condensation of S-benzyldithiocarbazate with indole-2-carbaldehyde, indole-3-carbaldehyde and indole-7-carbaldehyde. Treatment of these Schiff bases with acetate salts of Ni(II), Zn(II) and Cd(II) in ethanol yielded a series of complexes of 2:1 type (ligand/metal ratio) in which the ligands coordinated to the metal ions as monoanionic NS bidentate chelates. While the 2-imineindole and 3-imineindole formed the expected five-membered chelate rings, the X-ray crystal structure of [Cd(HL3)(py)(2)], (HL3 = the mono-deprotonated 7-imineindole), revealed an unusual mode of coordination, namely formation of four-membered rings with the metal atom. Reaction of the 7-imineindole with the metal ions in the presence of potassium hydroxide produced complexes of the type [M(L-3)(H2O)] in which the Schiff base acts as a dianionic NNS tridentate ligand. (C) 2010 Elsevier B.V. All rights reserved.

Item Type: Article
Additional Information: Department of Chemistry, Faculty of Science Building, University of Malaya, 50603 Kuala Lumpur, MALAYSIA
Uncontrolled Keywords: Schiff base; Indolecarbaldehyde; S-benzyldithiocarbazate; Divalent metal complexes; X-ray crystal structure
Subjects: Q Science > QD Chemistry
Divisions: Faculty of Science > Dept of Chemistry
Depositing User: Miss Malisa Diana
Date Deposited: 25 Mar 2013 02:20
Last Modified: 30 Jan 2019 01:08
URI: http://eprints.um.edu.my/id/eprint/5239

Actions (login required)

View Item View Item