Characterization of rigid endo- and exo-η3-allyl carbonyl diethyldithiophosphate molybdenum complexes: crystal structure of endo-Mo(η3-allyl)(CO){η2-S2P(OEt)2}(Dppe)

The stereochemical rigid complexes endo-Mo(η3-allyl)(CO){η2-S2P(OEt)2}(η2-dppm) (2a) and exo-Mo(η3-allyl)(CO){η2-S2P(OEt)2}(η2-dppm) (2b) are accessible by the reaction of complex Mo(η3-allyl)(CO)2{η2-S2P(OEt)2}(CH3CN) (1) with dppm in refluxing acetonitrile. Treatment of 1 with dppe in the similar reactive conditions of 2 affords the sole complex endo-Mo(η3-allyl)(CO){η2-S2P(OEt)2}(η2-dppe) (3). Complex 3 is characterized by X-ray diffraction analysis.