S. Okeya et al., SYNTHESES, STRUCTURES AND SOLUTION DYNAMICS OF ANIONIC 5-COORDINATE PT(II) COMPLEXES WITH HALIDE, Chemistry Letters, (6), 1998, pp. 541-542
Five-coordinate anionic complexes, [Pt(hfac)(2)X](-) (X = Cl, Pr, I),
were prepared by reaction of [Pt(hfac)(2)] and [PPh4]X in CH2Cl2. A di
storted square pyramidal structure was revealed by the X-ray analysis.
The variable-temperature H-1 and F-19 NMR spectra of these complexes
were explained by two independent dynamic motions in solution, which w
ere considered good models for the ligand exchange and cis-trans isome
rization reactions.