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Carbon-13 spin–lattice relaxation study on molecular dynamics of some penta- and tricarbonylchromium complexes

✍ Scribed by Adam Gryff-Keller; Przemyslaw Szczeciński; Hanna Koziel

Publisher: John Wiley and Sons
Year: 1990
Tongue: English
Weight: 825 KB
Volume: 28
Category: Article
ISSN: 0749-1581
DOI: 10.1002/mrc.1260280107

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✦ Synopsis

Abstract

Carbon‐13 spin–lattice relaxation times were measured for some penta‐ and tricarbonylchromium complexes of organic ligands. The chemical shift anisotropy of the carbonyl carbons was estimated to be ca. 500 ppm. The contributions of dipole–dipole and chemical shift anisotropy mechanisms to the overall relaxation were evaluated and used to determine the reorientational parameters for the ligand and carbonylchromium moieties. It seems that the internal rotation rate about the ligand—chromium bond is governed mainly by intermolecular interactions.

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