The reactions of [RuCl2(PPh3)(3)] and [RuCl(PPh3)(2)(eta-C5H5)] with PhC=(C
SePr)-Pr-i provide the seleno-latovinylidene complexes [RuCl2{=C=C((SePr)-P
r-i)Ph}(PPh3)(2)] and [Ru{=C=C((SePr)-Pr-i)Ph}(PPh3)(2)(eta-C5H5)](+). The
former, being coordinatively unsaturated, readily reacts with nitrogen and
phosphorus donor ligands with retention of the selenolatovinylidene moiety;
however, pi-acid Ligands induce facile elimination of PhC=(CSePr)-Pr-i.