Methanolysis of pyrazinecarbonitrile in the coordination sphere of copper(II). The crystal structure of dichlorobis(O-methylpyrazinecarboximidate)-copper(II) dihydrate

Reaction of pyrazinecarbonitrile (pz-CN) with copper(II) in methanol soluti on led to formation of solid complexes containing O-methylpyrazinecarboximi date (pz-C(NH)OMe) as a ligand. The analogous reaction of pyrazinecarbonitr ile in ethanol led to isolation of solid complexes containing unchanged pz- CN. Six novel copper(II) compounds have been obtained under various reactio n 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)] . 2H(2)O has been determined by X-ray diffraction techniques.