NISCAIR Online Periodicals Repository

NISCAIR ONLINE PERIODICALS REPOSITORY (NOPR)  >
NISCAIR PUBLICATIONS >
Research Journals >
Indian Journal of Chemistry -Section A (IJC-A) >
IJC-A Vol.50A [2011] >
IJC-A Vol.50A(09-10) [September-October 2011] >


Title: Discrete monomeric and chloride-bridged dimeric and 1D coordination polymeric mercury(II) complexes of a class of pyridyl-pyrazole ligands with variable denticity and flexibility
Authors: Javed, Saleem
Balamurugan, V
Jacob, Wilson
Sharma, Anuj Kumar
Mukherjee, Rabindranath
Keywords: Coordination polymers
Pyridyl-pyrazole ligands
Bidentate ligands
Tridentate ligands
Crystal structures
Non-covalent interactions
Emission spectra
Mercury
Issue Date: Sep-2011
Publisher: NISCAIR-CSIR, India
Abstract: Using a class of pyridyl-pyrazole ligands with variable denticity and flexibility, i. e., 1-benzyl-[3-(2′-pyridyl)]pyrazole (L10), 2-[3-(2′-pyridyl)pyrazol-1-ylmethyl]pyridine (L5) and 2,6-bis(pyrazol-1-ylmethyl)pyridine (L6), three new mercury(II) complexes – two discrete [(L10)HgII(–Cl)Cl]2 (1) and [(L5)HgIICl2] (2) and a coordination polymeric [(L6)HgIICl2]·HgCl2 (3), have been synthesized and structurally characterized. In complex (1) one of the chlorides from each [(L10)HgIICl2] unit acts as a bridge, affording a dichloro-bridged mercury(II) complex with slightly distorted square-pyramidal HgN2Cl3 coordination sphere. The structure of complex (2) reveals an almost ideal square-pyramidal HgN3Cl2 coordination sphere. Complex (3) has N3Cl2 distorted square-pyramidal coordination around HgII ion with coordination by L6 (facial mode) and two Cl ions. Notably, in complex (3) one HgCl2 molecule is present with each [(L6)HgIICl2] unit. Due to weak interaction by HgII-coordinated Cl ion of “[(L6)HgIICl2]” unit to HgCl2, complex (3) is a coordination polymer. Analysis of crystal packing diagram of complexes (1)–(3) reveals occurrence of a variety of non-covalent (, C–H and C–H...Cl) interactions, which play significant role in generating supramolecular architectures of varied topology.
Page(s): 1248-1256
CC License:  CC Attribution-Noncommercial-No Derivative Works 2.5 India
ISSN: 0975-0975(Online); 0376-4710(Print)
Source:IJC-A Vol.50A(09-10) [September-October 2011]

Files in This Item:

File Description SizeFormat
IJCA 50A(09-10) 1248-1256.pdf380.45 kBAdobe PDFView/Open
 Current Page Visits: 594 
Recommend this item

 

National Knowledge Resources Consortium |  NISCAIR Website |  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 © 2012 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: 556205 since 06-Feb-2009  Last updated on 15-Jul-2014Webmaster: nopr@niscair.res.in