Unexpected Formation of Copper Dimethylglyoxime Dimer From the Reaction of Cuprous Chloride and Tetradentate Buthylene-Bridged Diiminedioxime Ligand

• Main Authors: Panana Kitiphaisalnont, Upsorn Boonyang, Juttamanee Kowitthaya, Sutatip Siripaisarnpipat
• Language: English
• Published: Science Faculty of Chiang Mai University 2019
• Subjects: diiminedioxime; cuprous chloride; dimethylglyoxime; hydrogen bond; doubly chloro-bridged CuIIdimers
• Online Access: http://it.science.cmu.ac.th/ejournal/dl.php?journal_id=5956; http://cmuir.cmu.ac.th/jspui/handle/6653943832/66143
• Institution: Chiang Mai University

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.