Ruthenium and Rhodium Complexes of Thioether-Alkynylborates
摘要:
The species ((C6F5)(2)BCH2SPh)(2) reacts with PhC CLi to give the thioether-alkynylborate (C6F5)(2)BCH2SPh(C CPh)Li(THF)(2) (1). Subsequent reaction with (Ph3P)(3)RuHCl, (Ph3P)(3)RhCl, and [(COD)Rh(mu-Cl)](2) gives (C6F5)(2)BCH2SPh(C CPh)RuH(PPh3)(2) (2), (C6F5)(2)BCH2SPh(C CPh)Rh(PPh3)(2) (4), and (C6F5)(2)BCH2SPh(C CPh)Rh(COD) (5), respectively, demonstrating a bidentate binding mode via the alkynyl and thioether donors of the borate. Subsequent reactions of 2 and 4 with H-2 gave (C6F5)(2)BCH2SPh(CH2CH2Ph)RuH(PPh3)(2) (3) and ((C6F5)(2)BCH2SPh(CHCHPh))Rh(PPh3)(2) (6). In the former case, the borate remains bound to the metal via a g-interaction with the thioether-arene ring, while in the latter case, S and alkene binding is observed.