Is restricted M–P rotation a common feature of enantioselective monophos catalysts? An example of restricted Rh–P rotation in a secondary phosphine complex

The enantioselective hydrogenation catalyst [Rh(α-CgPH)2(cod)]BF4, (CgPH = 6-phospha-2,4,8-trioxa-adamantane) exists in solution as a mixture of two slowly interconverting rotamers, one with C2- and the other with C1-symmetry.

Figure optionsDownload as PowerPoint slide