Dimeric complexes of trimethylplatinum(IV) with ethylacetoacetate, methylacetoacetate, dimethylmalonate and diethylmalonate, and their pyridine and 2,2'-bipyridyl adducts

Article abstract of DOI:10.1016/0022-328X(92)80200-H

An 1H NMR study of the complexes 1COCHCOR²)>2 (R¹ = CH3, R² = OCH3 (1) and R¹ = CH3, R² =OC2H5 (2), R¹ = R² = OCH3 (3) and R¹ = R² = OC2H5 (4)) shows that in solution 1-4 are non-fluxional at ambient temperature, in contrast to the complexes with R¹ = R² = alkyl.Incorporation of alkoxy groups into the β-dicarbonyl ligand strengthens the Pt-C bridge bond.The 1:1 adducts of 1-4 with pyridine and 2,2'-bipyridyl contain bidentate (O,O'-bonded) and monodentate (C-bonded) dicarbonyl ligands, respectively.A correlation between ²J(Pt-CH3) and ²J(Pt-CH) for compounds with a trans (CH3)-Pt-(CH) feature is demonstrated.