An unusually short SiSi distance of 2.518(3) Å despite an antibonding interaction between these centers and a small endocyclic angle of 67° at phosphorus, these are the surprising structural features of the title compound 1, which forms by cyclocondensation of tBuSiFCl2 with CyPHLi in 33% yield. The structure of 1 reflects a tug-of-war between the three SiPSi and the six PSiP angles, Cy = cyclohexyl.
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Drieß et al. (1994) studied this question.
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