FWF - Oligosilylsubstituierte - Oligosilyl Substituted Phosphanes and Arsanes

Project: Research project

Project Details


The project envisages the synthesis of phosphanes and arsanes RE(SiMe3)2 (E = P, As, R = oligosilyl such as
Si(SiMe3)3). By reaction with hexachloroethane, the halogenated compounds RECl(SiMe3) will be synthesized,
which in turn will be treated with tertBuOK giving phosphinidenes and arsinidenes RP and RAs, besides KG and
tertBuOSiMe3. Reactions of these short-lived intermediates giving double-bonded species such as
di(oligosilyl)diphosphenes and di(oligosilyl)diarsenes, or depending an the reaction conditions
di(oligosilyl)triphosphaallyl anions and di(oligosilyl)hiarsaallyl anions will be studied. By synthesis of oligosilanes
bearing two bis(trimethylsilyl)phosphino- or arsino groups, cyclic or polymeric compounds with P=P or As=As
double bonds will be prepared using the reaction sequence described above.
The reaction of di(oligosilyl)chlorophosphanes and di(oligosilyl)chloroarsanes with tertBuOK is expected to result
in the simultaneous generation of a silylene and a phosphinidene (or an arsinidene). Their reactions will be studied.
The properties of the target molecules will be studied by NMR spectroscopy, X-ray crystallography, vibrational
spectroscopy and ab initio calculations.
Effective start/end date1/10/051/10/08