Becker, GerdBecker, BirgitBecker, WinfriedUhl, Werner2010-11-152016-03-312010-11-152016-03-311987340985844http://nbn-resolving.de/urn:nbn:de:bsz:93-opus-58087http://elib.uni-stuttgart.de/handle/11682/1294http://dx.doi.org/10.18419/opus-1277In studies of the reactivity and thermal stability of various alkylidenephos-phines prepared from benzophenone and organylbis(trimethylsilyl)phosphines via a NaOH-catalyzed elimination of hexamethyldisiloxane (eq. la), detailed analyses of nmr-spectra and x-ray structure determinations prove the methyl derivative la to dimerize to an 1,3-diphosphetane (2a), whereas from the iso-propyl compound 1b the 1,2-diphosphetane 2b is obtained [1]. This observation confirms our hypothesis that the formation of 1,2- or 1,3-diphosphetanes is determined by the steric requirements of the substituent at phosphorus.eninfo:eu-repo/semantics/openAccessAlkylphosphane , Phosphorverbindungen540article2014-09-11