Triphenylphosphine → Phenyl phosphorus dichloride

Participants

Reaction Steps

A mixture of 60 g (=0.4364 mole) of freshly distilled phosphorus trichloride and 40 g (=0.1527 mole) of triphenylphosphane (→molar ratio 2.86 to 1) is added dropwise in the course of 20 minutes to the apparatus which has been described in Example 6 and which is at 620° C. The subsequent distillation gives 24 g (=0.134 mole) of dichlorophenylphosphane and 17 g (=0.077 mole) of chlorodiphenylphosphane (→molar ratio 1.74 to 1), unconverted phosphorus trichloride and unconverted triphenylphosphane. The yield relative to the starting amount of triphenylphosphane is 41% of theory in dichlorophenylphosphane and 47% of theory in chlorodiphenylphosphane, with a 71% conversion. The chlorophosphanes obtained are particularly pure.

Provenance & Evidence