New Rhodium(I) Complexes with Hemilabile Amphiphilic Phosphanes

Abstract

A series of Rh I complexes was prepared and characterised with the following hemilabile amphiphilic phosphanes:The reactions between 1−6 and [Rh(COD)(THF) 2 ] + , and the subsequent reaction with CO were studied by 31 P NMR and IR spectroscopy. The data are consistent with the formation of P-coordinated and chelated (P,O) species for ligands 2−6, in agreement with the hemilabile character of these ligands. In the case of ligand 1, the complex trans-[Rh(1) 2 (CO) 2 ] + has