NISCAIR Online Periodicals Repository

Research Journals >
Indian Journal of Chemistry -Section A (IJC-A) >
IJC-A Vol.48A [2009] >
IJC-A Vol.48A(01) [January 2009] >

Title: Coordination equilibria of mixed ligand complexes of Cuˡˡ with glycylglycine and biguanide
Authors: Barman, T Roy
Mukherjee, G N
Keywords: Solution chemistry
Coordination equilibria
Mixed ligand complexes
Issue Date: Jan-2009
Publisher: CSIR
Abstract: Spectrophotometric and computer based pH metric investigations on the mixed ligand complex formation equilibria of Cuˡˡ with glycylglycine [(H₃⁺NCH₂CONHCH₂COO⁻), HGG±] and biguanide [(H₂¹N C(=²NH) ³NH C(=⁴NH) ⁵NH₂), Bg] in aqueous solution at 25±1ºC at a fixed ionic strength, I = 0.1 mol dm⁻³ (NaNO₃) in different molar proportions, indicate the formation of [Cu(GG)(H₂O)₂], [Cu(GG-H)(H₂O)], [Cu(Bg-H)(OH)], [Cu(GG-H)(Bg)], [Cu(GG-H)(Bg-H)-], [Cu₂ (GG-H)₂(Bg)], [Cu₂(GG-H)₂(Bg-H)⁻], [Cu₂(GG-H)₂(Bg-2H)²⁻] complexes. Shifting of electronic spectral λmax of Cuˡˡ with increase in pH correlates with a meridonial-facial isomeric equilibrium in the coordination modes of amide deprotonated glycylglycinate dianion, GG-H²⁻, in [Cu(GG-H)(Bg)]. Existence of the binuclear mixed ligand complexes indicates basket-like bridging double bidentate [(H₂¹N, =⁴NH), (=²NH, ⁵NH₂)] mode of chelation by the biguanide species.
Page(s): 38-44
ISSN: 0376-4710
Source: IJC-A Vol.48A(01) [January 2009]

Files in This Item:

File Description SizeFormat
IJCA 48A(1) 38-44.pdf147.8 kBAdobe PDFView/Open
 Current Page Visits: 834 
Recommend this item


Online Submission of Articles |  NISCAIR Website |  National Knowledge Resources Consortium |  Contact us |  Feedback

Disclaimer: NISCAIR assumes no responsibility for the statements and opinions advanced by contributors. The editorial staff in its work of examining papers received for publication is helped, in an honorary capacity, by many distinguished engineers and scientists.

CC License Except where otherwise noted, the Articles on this site are licensed under Creative Commons License: CC Attribution-Noncommercial-No Derivative Works 2.5 India

Copyright © 2015 The Council of Scientific and Industrial Research, New Delhi. All rights reserved.

Powered by DSpace Copyright © 2002-2007 MIT and Hewlett-Packard | Compliant to OAI-PMH V 2.0

Home Page Total Visits: 169241 since 01-Sep-2015  Last updated on 29-Jun-2016Webmaster: