摘要:
The air-stable iridium chlorodihydride complex IrH2Cl[((Pr2PC2H4)-Pr-i)(2)NH], 1, was prepared from the reaction of [IrCl(coe)(2)](2) with the pincer ligand ((Pr2PC2H4)-Pr-i)(2)NH in 2-propanol at 80 degrees C. Reaction of 1 with (KOBu)-Bu-t in THF resulted in the formation of the air-sensitive amidodihydride complex IrH2[((Pr2PC2H4)-Pr-i)(2)N], 2, which in the presence of 2-propanol readily forms the moderately air-stable trihydride complex IrH3[((Pr2PC2H4)-Pr-i)(2)NH], 3. The trihydride and amidodihydride complexes in the absence of a base are exceptionally active catalysts for the transfer hydrogenation of ketones in 2-propanol.