Methanolysis of pyridine-2-carbonitrile in the coordination sphere of copper(II), cobalt(II) and nickel(II). The structure of [Ni(o-methylpyridine-2-carboximidate)3]Br2·4H2O
作者:M. Jamnický、P. Segl'a、M. Koman
DOI:10.1016/0277-5387(94)00471-p
日期:1995.7
The reaction of pyridine-2-carbonitrile with copper(II), cobalt(II) and nickel(II) salts in methanol solution led to the formation of solid complexes containing O-methylpyridine-2-carboximidate as a ligand (L). Seventeen compounds with general formulae [MX(2)L], [MXL(2)]X, [MX(2)L(2)] Or [ML(3)]X(2), where X = Br-, Cl-, NCS-, ClO4- and M = Cu-II, Co-II, Ni-II, have been obtained under various reaction conditions. Their stereochemistry and the mode of ligand coordination have been determined by spectral, magnetic and conductometric measurements. The crystal structure of [Ni(O-methylpyridine-2-carboximidate)(3)]Br-2 . 4H(2)O was determined by X-ray diffraction techniques. The influence of the metal(II) atom on the composition and the stereochemistry of solid complexes is briefly discussed.