Methanolysis of Pyrazinecarbonitrile in the Coordination Sphere of Copper(II). The Crystal Structure of Dichlorobis(O-Methylpyrazinecarboximidate)-Copper(II) Dihydrate

Abstract

Reaction of pyrazinecarbonitrile (pz-CN) with copper(II) in methanol solution led to formation of solid complexes containing O-methylpyrazinecarboximidate (pz-C(NH)OMe) as a ligand. The analogous reaction of pyrazinecarbonitrile in ethanol led to isolation of solid complexes containing unchanged pz-CN. Six novel copper(II) compounds have been obtained under various reaction conditions. Their stereochemistry and the mode of ligand coordination has been determined by spectroscopic and conductometric measurements. Moreover, the crystal structure of the complex [CuCl₂(O-methylpyrazinecarboximidate)₂]. 2H₂O has been determined by X-ray diffraction techniques.