Abstract
The weakly-coordinated trifluoromethanesulfonate (triflate) in trans-(Ph 3P) 2Rh(CO)(OTf) (OTfOSO 2CF 3) can be readily replaced by ligand L to form stable ionic complexes [ trans-(Ph 3P) 2RhL(CO)]OTf (LMeCN, 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.
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