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A series of different ligands, X, varying from the neutral H2O to the strong σ donor, SiH3-, has been taken in the complex [PtClX(dms)2] in an effort to rationalize the trans influence of these ligands on the Pt–Cl bond. Several factors have emerged from this study. The first is that the Pt–Cl bond length is highly sensitive to the nature of the ligand opposite to it. There exists a linear relationship between the Pt–Cl bond length and the hardness of the ligand, besides various other linear relationships, such as those with the partial charge densities on the Pt and Cl atoms, the population of the platinum and chlorine orbitals, etc. Some observations regarding the relative strengths of the Pt–S bonds for dms and dmso ligands have also been made. [Copyright &y& Elsevier]

The molecular structures and stabilities of some of the lowest states of some C3H4 isomers have been calculated by two density functionals and the results compared with experimental data as well as our previous MNDO calculations. Results show that the B3LYP functional is the best suited for these studies. The MNDO results are also reasonably good in comparison with experiment. [Copyright &y& Elsevier]