Breit, Bernhard; Boese, Roland; Regitz, Manfred:

Organophosphorus compounds. LXXIII. Trapping reaction of in situ generated silene with tert-Bu-C.tplbond.P. Preparation of a diphosphatricyclobenzoheptane.

In: Journal of Organometallic Chemistry, Jg. 464 (1994) ; Nr. 1, S. 41-45
ISSN: 0022-328X
Zeitschriftenaufsatz / Fach: Chemie
Silene, R2Si:C(OR)Ph (R = SiMe3 through out this abstr.), can be generated thermally from the disilacyclobutane I by [2 + 2] cycloreversion and trapped by reaction with two equiv. of phosphaalkyne, Me3CC.tplbond.P under formation of the disphosphatricyclobenzoheptane II. Low-temp. x-ray crystal structure anal. of II confirms the result. A plausible reaction mechanism, based above all on cycloaddn. steps and an ene reaction, is presented.