名称:
Ready formation of stable cationic Rh(I) complexes of MeCN, formamide, urea and related species via replacement of the triflate in trans-(Ph3P)2Rh(CO)(OTf)
摘要:
The weakly-coordinated trifluoromethanesulfonate (triflate) in trans-(Ph3P)2Rh(CO)(OTf) (OTf = OSO2CF3) can be readily replaced by ligand L to form stable ionic complexes [trans-(Ph3P)2RhL(CO)]OTf (L = MeCN, formamide pyrone and urea). The replacement of triflate by carbon monoxide forms an unstable species that gradually loses CO and returns the starting material. Sterically hindered ligands such as 1,1,3,3-tetramethylurea and xanthone do not react.