The First Bimetallic Metallaboratrane:[RH_2{B(mt)_3}_2{kappa~2-S,S'-HB(mt)_3}]Cl and Its Synthesis from the Fluxional Rhodaboratrane Salt [Rh{B(mt)_3}(eta~4-C_8H_(12))]Cl,(Rh-B,mt=Methimazolyl)

摘要

The prolonged reaction of [Rh{B(mt)_3}(eta~4-C_8H_(12))]Cl,prepared from [Rh(eta~4-C_8H_(12))Cl]_2 and 2 equiv of Na[HB(mt)_3],with a further excess of Na[HB(mt)_3] leads to formation of the first binuclear metallaboratrane salt,[RH_2[B(mt)_3]_2{kappa~2-S,S'-HB(mt)_3}]Cl This compound,which is also observed as a decomposition product of rhodium tris(methimazolyl)borane complexes,affords the first evidence for bridging of transition metals by the methimazolyl sulfur donors.