Conformational inversion of 2,2′-bipyridine 1,1′-dioxide chelate ring in a series of (2,2′,2′′-triaminotriethylamine)(4,4′-disubstituted-2,2′-bipyridine 1,1′-dioxide)cobalt(III) complexes

Autor:	Maiko Nishimura, Hideaki Kanno, Mitsutoshi Yamada, Kazuya Nakata
Rok vydání:	2001
Předmět:	Stereochemistry Kinetics chemistry.chemical_element Ring (chemistry) Medicinal chemistry 2 2'-Bipyridine Inorganic Chemistry chemistry.chemical_compound chemistry Materials Chemistry Chelation Physical and Theoretical Chemistry Enantiomer Cobalt Racemization
Zdroj:	Inorganica Chimica Acta. 318:181-185
ISSN:	0020-1693
Popis:	A new series of cobalt(III) complexes, [Co(2,2′,2′′-triaminotriethylamine)(4,4′-X 2 bpdo)] 3+ (X=Me, MeO, EtO), where 4,4′-X 2 bpdo denotes 4,4′-disubstituted-2,2′-bipyridine 1,1′-dioxide, were prepared. The complexes were resolved into a pair of enantiomers (conformational optical isomers), and gradually racemized in water by conformational inversion of the skewed 4,4′-X 2 bpdo chelate ring, δ⇌λ. The rate of racemization is remarkably reduced with an increase in the electron-releasing ability of the 4,4′-X 2 substituents on bpdo.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::ebb52342f67ca80e57665ad6695afec4 https://doi.org/10.1016/s0020-1693(01)00408-x Zobrazit plný text záznamu Full Text from ScienceDirect