Chromium(III) complexes of l(+)-cysteine, dl-penicillamine and l(−)-cystine. Synthesis and spectromagnetic characterization

✍ Scribed by M. Freni; A. Gervasini; P. Romiti; T. Beringhelli; F. Morazzoni

• Book ID: 103907222
• Publisher: Elsevier Science
• Year: 1983
• Tongue: English
• Weight: 395 KB
• Volume: 39
• Category: Article
• ISSN: 1386-1425
• DOI: 10.1016/0584-8539(83)80060-9

✦ Synopsis

Chromium(II1) chloro-complexes with L( +)-cysteine, m_-penicillamine and L( -)-cystine were isolated and characterized by their vibrational, electronic and spectromagnetic properties. The coordination of sulphur containing amino acids involves amino and/or carboxylato groups; only in the case of penicillamine the mercapto group shows bonding with metal. The difference in the relative strength of binding sites, in the compounds here reported, is related to the tr -donor and x -acceptor properties of sulphur containing amino acids; specifically coordination of mercapto group becomes possible if amino and carboxylato groups supply to chromium the electronic charge required for the back-donation to d, sulphur orbitals.