Bimetallic group 6 tricarbonyls containing rigid backbone chelating ligands symmetrically bridged by bis(diphenylphosphino)‎alkane

Abstract EN

Bimetallic tricarbonyl complexes with chelating bis (diphenylphosphino)ethane or 1,10- phenanthroline bridged by bis (diphenylphosphino)alkane ligands of the type fac-[(L)M(CO)3]2(μ- dppa) (M = Mo (1), W (2); L = dppe, phen; dppa = dppe (a), dppb (b), dpph (c), dppo (d), dppd (e)) were prepared by the reaction of the labile tricarbonyl complexes fac-(L)M(CO)3(py) with the desired dppa which acts as a bridging ligand.

These complexes were characterized by FT-IR, 31P and 1H NMR spectroscopies and elemental analysis.

A brief study of the thermodynamic stability of some of these complexes in chlorinated hydrocarbons at ambient temperatures was conducted employing FT-IR spectroscopy.

All complexes are remarkably stable in solution for a prolonged period of time and show no fac-mer isomerization under conditions employed during this study.