Chiral Chelates with Chiral Ligands. The Stereoisomers of Tris [(+)-3-acetylcamphorato] cobalt(III)

Charles S. Springer, Robert E. Sievers, Binyamin Feibush

Research output: Contribution to journalArticle

28 Scopus citations

Abstract

The equilibrium mixture of the four diastereoisomers of tris-[(+)-3-acetylcamphorato]cobalt(III) at 60° in C6H6 has been found to contain 45.2 mol% Δ-trans, 31.3 mol% Δ-trans, 16.4 mol% Δ-cis, and 7.0 mol% Δ-cis isomer. These values indicate that, contrary to previous statemenss in the literature, the 3-acylcamphorato ligand exhibits only slight thermodynamic stereoselecttvity in tris complexes. The four isomers have been separated and characterized individually by 1H nmr, ORD, and CD. A study of their CD curvss reveals that a significant vicinal effect is extant in the visible region of the spectrum and that it is roughly additive to the configurational effect.

Original languageEnglish (US)
Pages (from-to)1242-1250
Number of pages9
JournalInorganic Chemistry
Volume10
Issue number6
DOIs
StatePublished - Jun 1 1971
Externally publishedYes

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry
  • Inorganic Chemistry

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