Abstract
The 1H, 31P and 13C NMR spectra of cis-dialkyl(acetylacetonato)bis(tertiary phosphine)cobalt(III) complexes were obtained in several solvents. These complexes have an octahedral configuration with trans tertiary phosphine ligands. The coordinated tertiary phosphine ligands are partly dissociated in solution. One of the phosphine ligands in CoR 2(acac)(PR 3′) 2 can be readily displaced with pyridine bases to give pyridine-coordinated complexes. From observation of the 1H and 31P NMR spectra several kinetic and thermodynamic data for exchange reactions and displacement reactions of tertiary phosphines were obtained.
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