Addition von O- und C-Nucleophilen an Ruthenium-Schwefeldioxid-Komplexe, Struktur von [cpRu(dppm)(SO2Et)] / Addition of O- and C-Nucleophiles to Ruthenium Sulfur Dioxide Complexes, Structure of [cpRu(dppm)(SO2Et)]

Abstract

Ruthenium-sulfur dioxide complexes [cpRu(PR3)2(SO2)]Cl ((PR3)2 = (PPh3)2, Ph2PCH2PPh2(dppm), Ph2PC2H4PPh2(dppe)) add alkoxide to give sulfito complexes [cpRu(PR3)2(SO2OR′)] (R′ = Me, Et, /Pr). Reactions of [cpRu(dppm)(SO2)]Cl with LiR′ (R′ = Me, Bu, Ph), MgBrR′ (R′ = Et, CH=CH2) or ZnEt2 give sulfinato complexes [cpRu(dppm)(SO2R′)]. The structure of [cpRu(dppm)(SO2Et)] was determined by X-ray crystallography: Crystals are triclinic, space group P1̄, a = 11,008(1), b = 15,998(6), c = 17,813(2) Å, α = 92,30(2), β = 93,916(8), γ = 107,54(2)°, Z = 4. Salient features are a short Ru-S bond and relatively long S-O bonds which attest to the high π-donor ability of the pseudo-tetrahedral metal fragment.