Abstract: | The geometries and total energies of several T-shaped platinum(II) complexes of the type (H3P)PtXY (X, Y=Cl, CH3, SiH3, Si(OH)3) were calculated by ab-initio methods. In the most stable isomer, the ligand with the smallest trans influence is trans to the PH3 ligand. The trans influence increases in the order Cl<CH3<SiH3<Si(OH)3. |