Journal of the Chemical Society. Chemical communications p. 673 - 674 (1993)
Update date:2022-07-29
Topics:
Heim, Udo
Pritzkow, Hans
Schoenberg, Hartmut
Gruetzmacher, Hansjoerg
Halide abstractions from P-chlorinated phosphorus ylides 9a-c either by AlCl3 or SnCl2 yield unsymmetrical methylene phosphonium ions 10a-c in which energy barriers > 83 kJ mol-1 for the rotation around the P=C have been estimated by NMR techniques.The salts with AlCl4- counteranions are stable, but compounds with SnCl3- anions decompose stereoselectively to unsymmetrical methylene phosphanes, SnCl2, and t-BuCl.
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