Abstract
The enthalpies of reaction of a fluorous tertiary phosphine, P(CH2CH2(CF2)5CF3)3 (PRf3 ) with [Rh(CO)2Cl]2 (1) and Cp‘Ru(COD)Cl (Cp‘ = η5-C5H5 (2), η5-C5Me5 (3)), leading to the formation of RhCl(CO)(PRf3)2 and Cp‘Ru(PRf3)2Cl complexes have been measured by anaerobic solution calorimetry in THF at 30.0 °C. These reactions are rapid and quantitative. The measured reaction enthalpies allow for a quantitative determination of characteristic phosphine steric and electronic parameters associated with this novel tertiary phosphine ligand. Sterically, the P(CH2CH2(CF2)5CF3)3 ligand appears identical to PEt3.
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