75388-02-2Relevant academic research and scientific papers
EINE NEUE SYNTHESE VON 1,2-DIPHOSPHACYCLOBUTENEN-(3)
Appel, R.,Barth, V.
, p. 1923 - 1924 (1980)
Two-fold TmsCl-condensation between PhTms2 and (OCCl)2 followed by 1,3(PO)-silyl migration and -cycloaddition yields directly the otherwise only difficulty obtainable 1,2-diphospha-cyclobutenes-(3).
Low Coordinated Phosphorus Compounds, 17. Diphosphabutadienes
Appel, Rolf,Barth, Volker,Knoch, Falk
, p. 938 - 950 (2007/10/02)
The reaction of the silylated phosphaalkene 1 with hexachloroethane (2) yields the chlorophosphaalkene 3, which reacts with additional 1 under chlorotrimethylsilane elimination to give the first 2,3-diphosphabutadiene 6.This can be prepared as well from the persilylated diphosphane 4 and 2,2-dimethylpropionyl chloride (5).The spectroscopic and x-ray data of 6 are discussed.Experiments for the preparation of the 1,4-diphosphabutadienes 11a, b from the organylbis(trimethylsilyl)phosphanes 9a, b and oxalyl chloride yield the correspondingly substituted 3,4-diphosphacyclo butenes 12a, b.The reaction of 1 with phosgene and isocyanide dichloride 14b yields instead of the expected 1,3-diphosphabutadienes 16a, b the 1,3-diphosphacyclobutenes 17a, b, whose structure is affirmed by x-ray structure determination of 7a.The formation of the cyclobutenes 12a, b and 17a, b is discussed.
