Larisa A. Kovbasyuk, I. Fritsky, V. Kokozay
Mar 4, 1997
Citations
0
Influential Citations
32
Citations
Journal
Polyhedron
Abstract
Abstract Two complexes of diaqua-bis(ethylenediamine)copper(II) with anions of N-car☐yglycine and ethylenediaminebiscar☐ylic acid [Cu(en)2(H2O)](OOCCH2NHCOO) · H2O (1) and [Cu(en)2(H2O)2](OOCNHCH2CH2NHCOO) · 2H2O (2) were synthesized and investigated by single-crystal X-ray analysis and IR spectroscopy. Compound 1 was obtained by direct synthesis upon interaction of copper powder with glycine hydrochloride in methanol solution upon heating in air. Compound 2 was isolated as a result of a reaction between a copper(II) anionic complex with pyruvoylamide oxime (H2pox) of composition K[Cu(pox)(Hpox)] with ethylenediamine and formaldehyde in methanol solution. In both cases formation of carbamate anions is connected with uptake of atmospheric carbon dioxide by the reaction mixtures. The crystal structures of 1 and 2 comprise [Cu(en)2H2O)2]2+ cations, carbamic acids anions and solvate water molecules. The complex cations of 1 and 2 consist of two ethylenediamine molecules coordinated in the equatorial plane [Cu-N = 2.007(3)–2.024(3)A for 1 and 1.996(2) and 2.022(2)A˚ for 2], and water molecules occupying the apical positions of distorted octahedral [Cu-O = 2.591(3) and 2.741(3)A˚ for 1 and 2.556(3)A˚ for 2]. The extended hydrogen bond system in 1 and 2 unites the elements of the structures.