Formation of a diazadiphosphetidine from the reactions of a bis(aminosilyl) ether with PCl3: crystal structure of cis-[(ButNH)PNBut]2

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N. Dastagiri, Anil J. Elias and Ashwani Vij


Abstract

Reaction of O[SiMe2N(But)H]2 1 with PCl3 in 1∶1 molar ratio in hexane in presence of NEt3 gave the cyclic four-membered diazadiphosphetidine cis-[(ButNH)PNBut]2 2 instead of the expected six-membered silazoxyphosphine indicating cleavage of the Si–N bond. A crystal structure analysis of 2 showed that the NH hydrogens of the ButNH groups are in an endo-endo orientation above the (PN)2 ring which is in contrast to the exo-endo orientation for the known structure of its disulfide.


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