Reactivity of Dihydrides MH2P4(M = Fe, Ru, Os) with SnCl2: Preparation of Bis(trihydridestannyl) Derivatives

Abstract

Depending on the nature of the central metal and experimental conditions, the reaction of dihydride MH2P4 [M = Fe, Ru, Os; P = P(OEt)3, PPh(OEt)2] with SnCl2 gives both hydride-trichlorostannyl- MH(SnCl3)P4 (1, 2) and bis(trichlorostannyl) complexes M(SnCl3)2P4 (3, 4). Treatment of compounds 1−4 with NaBH4 in ethanol yielded both mono(trihydridestannyl) MH(SnH3)P4 (5, 6) and bis(trihydridestannyl) derivatives M(SnH3)2P4 (7, 8). Reaction of the hydride−trihydridestannyl complexes MH(SnH3)P4 with CO2 (1 atm) led to hydroxobis(formate)stannyl derivatives MH[Sn(OH){OC(H)═O}2]P4 (9, 10). The complexes were characterized by spectroscopy (IR and 1H, 31P, 13C, 119Sn NMR) and by X-ray crystal structure determination of OsH[Sn(OH){OC(H)═O}2][PPh(OEt)2]4 (10b).