Synthesis and Structure of the Dimethyl Sulfide Adducts of Mono- and Bis(pentafluorophenyl)borane

The borane dimethyl sulfide adduct H(3)B center dot SMe(2) and the diethyl ether adduct of tris(pentafluorophenyl)borane, (C(6)F(5))(3)B center dot OEt(2), undergo facile exchange of hydride and pentafluorophenyl ligands, yielding (C(6)F(5))(2)HB center dot SMe(2) (1) and (C(6)F(5))H(2)B center dot SMe(2) (2) depending upon the ratio of reagents used. In the presence of excess dimethyl sulfide, both compounds can be isolated as colorless crystals, which have been structurally characterized.