Unexpected Formation of Copper Dimethylglyoxime Dimer Fromthe Reaction of Cuprous Chloride and Tetradentate Buthylene-Bridged Diiminedioxime Ligand
Panana Kitiphaisalnont, Upsorn Boonyang, Juttamanee Kowitthaya and Sutatip Siripaisarnpip* Author for corresponding; e-mail address: fscists@ku.ac.th
Volume: Vol.42 No.3 (JULY 2015)
Research Article
DOI:
Received: 28 November 2013, Revised: -, Accepted: 22 October 2014, Published: -
Citation: Kitiphaisalnont P., Boonyang U., Kowitthaya J. and Siripaisarnpip S., Unexpected Formation of Copper Dimethylglyoxime Dimer Fromthe Reaction of Cuprous Chloride and Tetradentate Buthylene-Bridged Diiminedioxime Ligand, Chiang Mai Journal of Science, 2015; 42(3): 712-717.
Abstract
A reaction of a ligand 3,3´-(1,4-butanediyldinitrilo)bis(2-butanone)dioxime (BnH2) and CuCl yield green [Cu(H2dmg)Cl(μ-Cl)]2,1. The dimethylglyoxime (H2dmg) and CuIIions in 1 were in situ produced during the course of reaction and formed doubly chloro-bridged Cu(II) dimers. The geometry around copper ion is distorted square pyramidal. The weak intermolecular hydrogen bonds are observed in 1 giving 1D structure. The existence of two O–O distances of O2–O1= 2.922 Ǻ and O4–O3= 2.910 Ǻ indicates that these weak intermolecular hydrogen bonds are not equivalent. Hence doublet of the O-H stretching at 3302 and 3216 cm-1 are observed.