Aromaten(phosphan)metall‐Komplexe, XII. Unerwartete Bildungsweise der Monohydrido(phosphan)‐osmium(II)‐Komplexe C6H6OsH[PMe2(OR)]I aus C6H6Os(PMe2H)I2. Eine Verbindung mit einer OsPMe2‐Bindung als Zwischenstufe?

Arene(phosphane)metal Complexes, XII. Unexpected Formation of Monohydrido(phosphane)osmium(II) Complexes C6H6OsH[PMe2(OR)]I from C6H6Os(PMe2H)I2. A Compound with an OsPMe2 Bond as Intermediate? The reaction of [C6H6OsI2]2 (4) with PMe2H produces the compound C6H6Os(PMe2H)I2 (5) which reacts with KO-t-C4H9 in methanol or diethylamine to give the monohydrido-(phosphane)osmium(II) complexes C6H6OsH[PMe2(OR)]I (6a, RCH3; 6b, Rt-C4H9). The mechanism possibly involves the formation of an intermediate 7 containing an OsPMe2 bond.