CHIRAL METAL COMPLEXES. 49. STRUCTURAL STUDIES OF TERNARY Co(III) COMPLEXES OF N,N'-DI (2S-PYRROLIDIN-2-YL)-lS, 2S-DIAMINOCYCLOHEXANE AND α-AMINOACIDS

Autor: Peter A. Williams, Robert S. Vagg, Frederick S. Stephens, Michael A. Cox
Rok vydání: 1997
Předmět:
Zdroj: Journal of Coordination Chemistry. 41:275-290
ISSN: 1029-0389
0095-8972
DOI: 10.1080/00958979708045505
Popis: Ternary complexes of the type δ-β1,2−[Co (S,S,S,S,-pychxn)(aa)]2+ where S,S,S,S-pychxn is N,N'-di(2S-pyrrolidin-2-yl)-lS,2S-diaminocyclohexane and aa is an aminoacidate (glyH = glycine, alaH = alanine) have been synthesized and structurally characterized. A-pV[Co(. S′S′S′S′-pychxn)-(gly)](C104)2.2H2O is orthorhombic, space group P2,2,2, with a = 10.133(2), b = 14.418(2), c = 19.646(5) A and Z = 4. The structure was refined to R = 0.065 and Rw = 0.072 for 2224 reflections with I 3[sgrave](I). δ-β2−[Co (S,S,S,S-pychxn) (R-ala)](CIO4)2.2H2O is orthorhombic, space group P212121, with a - 10.933(4), b = 13.667(2), c = 18.853(3) A, and Z = 4. This structure was refined to R = 0.040 and Rw = 0.033 for 2221 reflections with /  3[sgrave](I). Both complex structures are analogous in that the coordination of the tetradentate is identical with both nitrogen atoms of coordinated pyrrolidyl groups adopting S absolute configurations; the two internal nitrogen atoms have opposite configurations with that at th...
Databáze: OpenAIRE