LIGAND SCAVENGING AND CATALYTIC UTILIZATION OF THE PHOTOTRANSIENT ReH5(PMe2Ph)2

Article abstract of DOI:10.1016/S0022-328X(00)86115-X

Photogenerated ReH5P2 (P = P(CH3)2C6H5) effects hydrogen exchange selectively at the β-carbons of naphthalene.Under one atm H2, hex-1-ene is hydrogenated catalytically.Cyclopentene, however, forms the complex ReH3P3(η²-C5H8), whose crystal structure shows hydride coordinated cis to the olefin.Photolysis of this complex results in disproportionation of the carbocycle to yield cyclopentane, (η⁵-C5H5)ReH2P2 and (η⁵-C5H5)ReH4P.In the presence of t-butylethylene as a hydrogen acceptor, ReH5P2 is transformed into a species which dehydrogenates cyclopentane to (η⁵-C5H5)ReH2P2.Reaction of ReH5P2 and t-butylethylene in benzene solvent under N2 yield the arene complex (C6H6)ReP2(CH2CH2CMe3) and fac-Re(PMe2C6H5)3(PMe2C6H4N2, whose crystal structure is reported.