A study of electronic transmission in cobalt(III) dimethylglyoxime complexes by nuclear magnetic resonance spectroscopy
- 1 January 1969
- journal article
- research article
- Published by Royal Society of Chemistry (RSC) in J. Chem. Soc. A
- p. 554-559
- https://doi.org/10.1039/j19690000554
Abstract
The n.m.r. spectra of a number of cobalt(III) dimethylglyoxime complexes of the type Co(DH)2LX where L is triphenylphosphine or pyridine have been measured. The chemical shifts of the dimethylglyoxime methyl hydrogens and the hydrogen-bonded hydrogens depend on the axial ligands and a correlation has been found between the chemical shift of the methyl hydrogens and the Hammett σpara-function of the ligand X. This correlation is interpreted as lending support to the suggestion that the ground-state cis-effect in these complexes reflects changes in the electron density in the cis-ligand.Keywords
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