| Literature DB >> 5263759 |
Abstract
A 220-MHz proton nuclear magnetic resonance study of the binding of Ni(II) and Co(II) acetylacetonates to retinyl-N-methyl Schiff's bases is presented. The study has yielded the magnitude and sign of spin densities at the carbon atoms in the pi system of the 9-cis, 13-cis, and all trans isomers. From a comparison of the experimental results with molecular orbital calculations, a mechanism for transfer of spin from the metal to the retinyl Schiff's base and its subsequent delocalization down the polyene chain is provided.Entities:
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Year: 1970 PMID: 5263759 PMCID: PMC286186 DOI: 10.1073/pnas.65.1.31
Source DB: PubMed Journal: Proc Natl Acad Sci U S A ISSN: 0027-8424 Impact factor: 11.205