Heavy Tetrel Complexes of Ru Featuring Ru=E(R)X and Ru-E-R (E = Sn, Pb) Linkages

The hydridoruthenate [(solv)Na][Cp*((Pr2MeP)-Pr-i)RuH2] (1; solv = THF or Et2O) provided access to the Ru metallostannylene Cp*((Pr2MeP)-Pr-i)(H)(2)RuSnDMP (DMP = 2,6-dimesitylphenyl) (2) and metalloplumbylene Cp*((Pr2MeP)-Pr-i)(H)(2)RuPbArTrip2 (Ar-Trip2 = 2,6-bis (2,4,6-triisopropylphenyl)phenyl) (3) compounds by salt metathesis reactions with the corresponding [ArEX](2) precursors. The Sn complex 2 reacted nucleophilically with MeI to cleanly generate the addition product Cp*((Pr2MeP)-Pr-i)(H)(2)RuSnI(Me)DMP (4), while a complex mixture was observed for Pb complex 3. A Ru monohydride synthon generated from 1 also provided access to the chlorostannylene and bromoplumbylene complexes Cp*((Pr2MeP)-Pr-i)(H)Ru[SnCl(DMP)] (5) and Cp*((Pr2MeP)-Pr-i)(H)Ru[PbBr(Ar-Trip2)] (6), respectively.