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

Figure S119. 31 P{ 1 H} NMR.
Reaction of [1-P 2][BF 4] with 2 equiv [HPt][PF 6].
19.3 mg (0.017 mmol) [1-P 2][BF 4], 22.9 mg (0.0357 mmol, 2 equiv) [HPt] + , 4.5 mg (0.017
mmol) 18-crown-6, and 2.9 mg (0.017 mg) NaPF 6 were added to a small vial, and dissolved in
C 6D 5Cl. The mixture was transferred to a J-Young NMR tube, and the reaction was monitored by
1 H and 31 P NMR. After initial formation of carbene 2-P2, no further reduction was observed over
3 days. The crown ether and NaPF 6 were added in an attempt to favor formation of soluble
coupled products. In a separate experiment, only cation [1-P 2][BF 4] and 2 equiv [HPt] + were
mixed, and the same results were observed.
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