Original scientific paper

The Crystal Structure of Potassium Dinitro-bis(R,S- alaninato)cobaltate(III) Monohydrate

Boris Kamenar ; Laboratory of General and Inorganic Chemistry, Faculty of Science, University of Zagreb, P. O. Box 153, 41001 Zagreb Croatia
Branko Kaitner ; Laboratory of General and Inorganic Chemistry, Faculty of Science, University of Zagreb, P. O. Box 153, 41001 Zagreb Croatia
Neven Strukan ; Laboratory of General and Inorganic Chemistry, Faculty of Science, University of Zagreb, P. O. Box 153, 41001 Zagreb Croatia

Abstract

The crystal structure of the title complex has been determined from diffractometer X-ray intensity data by means of the heavy-atom method and refined by least-squares procedure to anR index of 0.039 (Rw = 0.055). The crystals are built up of K+ cations, {ColCH-iCHINF^jCOOkiNCMv}" anions and water molecules. The cobalt atom is octahedrally coordinated by two oxygen (1.899 and 1.916 Å) and two nitrogen atoms (1.945 and 1.946 Å) from two alaninato ligands, and two nitrogen atoms (1.909 and 1.913 Å) from two nitro groups in cis positions. The structure of the anion is disordered in the regions of the asymmetrical carbon atoms. Each potassium ion is surrounded by eight oxygen atoms from alaninato and nitro ligands as well as water molecules at the distances varying from 2.676 to 3.163 Å. The water molecules take part in the hydrogen bonding between nitro and alaninato carboxyl groups

Keywords

Hrčak ID:

137136

URI

https://hrcak.srce.hr/137136

Publication date:

29.1.1993.

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