Abstract
| - Reactions of 1,3-bis(trimethylsilyl)-4,4-dichloro-1,3,2λ2,4-diazaphosphoniaaluminatacyclobutane with Cl- or CN- give phosphazane derivatives, and the cycloaddition (cycloexpansion) is mimicked by the reversible reaction with (Me3Si)2NPNSiMe3 which gives an azadiphosphiridine derivative as a result of intramolecular cross-ring P→P coordination.
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