No abstract

No abstract

No abstract

ChemInform Abstract Photolysis of pure trans-2,4-dineopentyldisilacyclobutane (I) or its cis isomer (II) gives rapid isomerization to a 70/30 equilibrium of the isomers and less rapid formation of ring-opened vinylsilane isomers. In the presence of MeOH (III), MeOSiMe3, or (EtO)3SiH the expected adducts (V) are observed in addition to the ring-opened isomers (IVa) and (IVb). Solvent dependence of the yields suggests that all of the products arise from single excited state(s). The results are consistent with the initial formation of a singlet ring-opened 1,4-biradical which recloses rapidly to starting material or goes on to the observed products.

1991 organic chemistry, review organic chemistry, review Z 0200 47 -315 Recent Results in the Chemistry of Silylenes and Germylenes -(20 refs.). -(GASPAR, P. P.; BOBBITT, K. L.; LEE, M. E.; LEI, D.; MALONEY, V. M.; PAE, D. H.; XIAO, M.; 9 (1990) 100-111; Edited by Bassindale, A. R. ;Gaspar, P. P. ;R. Soc. Chem., Cambridge, UK; EN)