Synthesis of a heterobimetallic dihydride by the addition of a rhenium dihydride to a platinum(0) complex

Synthesis and Crystal Structure of the Novel Dianion [Re(CO)3(η5-7-CB10H11)]2-. Reactions with Platina- and Palladaphosphine Chlorides

“…A host of bimetallic rhenium−platinum complexes have been synthesized, with much interest focusing on their potential catalytic behavior …”

“…The apparent dynamic behavior of the B−H⇀Pd system of 5a in solution suggested that this complex may be a candidate for reaction with 2 e - donor ligands, possibly leading to simple addition to the complex or even substitution of a CO ligand; the labilizing of Re−CO ligands in rhenium−platinum complexes has been documented 9a. Treatment of CH 2 Cl 2 solutions of complex 5a with CNR (R = Bu t , C 6 H 3 Me 2 -2,6) at −78 °C yielded the complexes [RePd(CO) 2 (CNR){Ph 2 P(CH 2 ) 2 PPh 2 }(η 5 -7-CB 10 H 11 )] (R = Bu t ( 5b ), R = C 6 H 3 Me 2 -2,6 ( 5c )).…”

A pseudo-trigonal bipyramidally coordinated Pt atom in dicarbonylbis(octacarbonyl-μ-dicyclohexylphosphidodirhenio)platinum(II)

“…The Re1ÐRe2 bond is 3.2620 (15) A Ê and the "-P1 bridge is symmetric with respect to the equivalent PÐRe bond lengths of 2.454 (6) and 2.459 (6) A Ê . The two PtÐRe bonds differ slightly in length [2.9165 (12) and 2.9025 (15) A Ê for Re1 and Re2, respectively], but they are longer than other unsupported PtÐRe bonds reported in the literature, which range from 2.706 (1) to 2.899 (1) A Ê (Casey et al, 1987(Casey et al, , 1992Urbancic et al, 1984;Beringhelli et al, 1990Beringhelli et al, , 1993Mague & Lin, 1994). A "-H bridged PtÐRe edge has been reported with a length of 2.906 (1) A Ê (Beringhelli et al, 1990).…”

Carbon monoxide labilization and hydrogen-transfer pathways in cationic phosphido-bridged rhenium-platinum heterobimetallic systems and the molecular structures of [.eta.5-Cp(ON)Re(.mu.-PR2)(.mu.-H)Pt(PPh3)2]X (R = Cy, X- = PF6-; R = Ph, X- = BF4) and [.eta.5-Cp(ON)HRe(.mu.-PCy2)Pt(PPh3)2]BF4, a rare example of bridging- and terminal-hydrido geometric isomers

“…is structurally analogous to the postulated intermediate 20 (Scheme II) may be protonated by strong acids to give the terminal-hydrido tungsten cation [Cp(OC)2HW(M-PPh2)Pt(CO)(PPh3)]+ (23)…”