Phosphorus m Halides

The bicyclic diphosphine (52), on treatment with phosphorus(m) halides, breaks down via a monocyclic intermediate (53) to NN -bis(dihalogeno-phosphino)dimethylhydrazine (54) as shown in equation (ll).368 Imino-groups can be incorporated at each phosphorus atom of compound (52) by... 

Reactions of organomagnesium compounds with phosphorus(m) halides and trialkyl phosphites are normally straightforward the main limitations are steric hindrance, and the instability of the products. Some examples are listed in Table 15.3, and others are tabulated in General Ref. [A]. 

For phosphorus(m) halides Lewis acidity is extremely limited the only example appears to be... 

Condensation reactions of the aminodiphosphazene (91) with substituted phosphorus(m) halides give, instead of the expected cyclotriphosphazo-diene... 

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