Département de chimie moléculaire

The authors report the study of the net donating ability of monodentate and bidentate P ligands stemming from secondary phosphine oxides (SPOs). The authors exptl. measured and/or calcd. the frequencies of CO stretching modes of various metal carbonyl complexes [(SPO)Ni(CO)3] and cis-[(SPO)2Mo(CO)4]. The inferred electronic properties of the ligands span an unprecedented range, going from $π$-accepting phosphite-like compds., to extremely electron-donating ligands outclassing N-heterocyclic carbenes. The prepn. and/or crystal structures of several rhodium, iridium and molybdenum phosphine complexes are also reported. [on SciFinder(R)]