Extended normal coordinate analysis of an (arene)osmium(II) complex with the inclusion of the ring ligand

Abstract Results are presented of an optimized valence force field of the dihydridoosmium(II) complex [(mes)OsH 2 (CO)] (mesC 6 H 3 (CH 3 ) 3 -2,4,6) in which the ring was treated as a point mass. The Raman and IR spectra of metal-coordinated mesitylene are given and the results of normal coordinate analysis of the arene described. From the results, a modified general valence force field including the whole ring ligand has been calculated. The results are discussed, and compared with those of the model with point mass approximation.