80524-91-0Relevant academic research and scientific papers
Thermal and photochemical substitution reactions of CpRe(PPh3)2H2 and CpRe(PPh3)H4. Catalytic insertion of ethylene into the C-H bond of benzene
Jones, William D.,Maguire, John A.,Rosini, Glen P.
, p. 77 - 86 (2008/10/08)
The thermal and photochemical reactions of CpRe(PPh3)2H2 and CpRe(PPh3)H4 (Cp = η5-C5H5) with PMe3, P(p-tolyl)3, PMe2Ph, DMPE, DPPE, DPPM, CO, 2,6-xylylisocyanide and ethylene have been examined. While CpRe(PPh3)2H2 is thermally inert, it will undergo photochemical substitution of one or two PPh3 ligands. With ethylene, substitution is followed by insertion of the olefin into the C-H bond of benzene, giving ethylbenzene. CpRe(PPh3)H4 undergoes thermal loss of PPh3, which leads to substituted products of the type CpRe(L)H4. Photochemically, reductive elimination of dihydrogen occurs preferentially. The complex trans-CpRe(DMPE)H2 was structurally characterized, crystallizing in the monoclinic space group P21/n (No. 14) with a=6.249(6), b=16.671(8), c=13.867(7) A?, β=92.11(6)°, V=1443.7(2.9) A?3 and Z=4. The complex trans-CpRe(PMe2Ph)2H2 was structurally characterized, crystallizing in the monoclinic space group P21/n (No. 14) with a=7.467(3), b=23.874(14), c=11.798(6) A?, β=100.16(4)°, V=2070.2(3.4) A?3 and Z=4.
LIGAND SCAVENGING AND CATALYTIC UTILIZATION OF THE PHOTOTRANSIENT ReH5(PMe2Ph)2
Green, Mark A.,Huffman, John C.,Caulton, Kenneth G.,Rybak, Witold K.,Ziolkowski, Jozef J.
, p. C39 - C43 (2007/10/02)
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.
