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.