Homogeneous CO Hydrogenation: Ligand Effects on the Lewis Acid ...

multinuclear NMR spectra were obtained, showing high conversion to the further reduced
confused alkyl [5] - and cation [1-E 2] + (resulting from hydride transfer from 2-E 2). A small
amount of carbene 2-E 2 remained, along with small amounts of residual [HPt] + from the
synthesis of 2-M 2.
Figure S125. 31 P{ 1 H} NMR.
VI. Reductions of Monophosphine Complexes.
A. Reduction of [(PPh 3)Re(<strong>CO</strong>) 5][OTf] ([1-Ph 1][OTf]).
Reaction of [1-Ph 1][OTf] with 1 equiv [HPt][PF 6].
A small vial was charged with 16.7 mg (0.0225 mmol) [1-Ph 1][OTf] and ~0.6 mL C 6D 5Cl. With
stirring, 14.4 mg (0.0225 mmol) [HPt][PF 6] was slowly added, and the reaction mixture
transferred to a J-Young NMR tube. After 20 minutes, 1 H NMR spectroscopy revealed a mixture
S112