1292785-45-5Relevant academic research and scientific papers
Reactions of bis(alkynyl)silanes with HB(C6F5) 2: Formation of boryl-substituted silacyclobutene derivatives
Ugolotti, Juri,Dierker, Gereon,Fr?hlich, Roland,Kehr, Gerald,Erker, Gerhard
, p. 1184 - 1188 (2011)
Treatment of R2Si(CC-SiMe3)2 [1a (Me), 1b (Ph)] with HB(C6F5)2 at low temperature (253 K (a), 273 K (b)) gives the -B(C6F5)2 substituted silacyclobutene products (4a,b) under kinetic control. Upon warming to room temperature they disappear to form the thermodynamically favoured isomeric silole derivatives (2a,b). Similar treatment of Me2Si(CC-R 1)2 [5a (R1 = Ph), 5b (R1 = tert-butyl) with HB(C6F5)2 at room temperature gave the stable -B(C6F5)2 substituted silacyclobutene derivatives 6 and 7, respectively. Subsequent photolysis resulted in a Z- to E-isomerization of the substituted exocyclic CC double bonds in these products. The silacyclobutene derivative E-6 was characterized by an X-ray crystal structure analysis.
