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Silenes photoisomerization

Silenes of the family Me3SiR1Si=C(OSiMe3)Ad-l 137 undergo a complex silene-to-silene photoisomerization reaction90,94,96. When silenes 137 are generated by photolysis of acylsilanes 138, the isomeric silenes 139 and 140 are formed in a subsequent reaction. The reaction was followed by UV and NMR spectroscopy. The disappearance of 138 cleanly follows first-order kinetics and the overall kinetics were consistent with the transformation 138 -> 137 -> 139. 137 as well as 139 were characterized by NMR spectroscopy and, in addition, the structure of 137 was established by trapping with methanol. The identity of 139 and 140 was confirmed by the isolation of their head-to-tail dimers from which crystals, suitable for X-ray analyses, were isolated (equation 34)90. [Pg.881]

The generation and reactions of silenes have attracted attention. Photoisomerization of the mesitoylsilane (218) affords... [Pg.410]

See other pages where Silenes photoisomerization is mentioned: [Pg.136]    [Pg.914]    [Pg.1143]    [Pg.914]    [Pg.1143]   
See also in sourсe #XX -- [ Pg.1167 , Pg.1168 ]

See also in sourсe #XX -- [ Pg.1167 , Pg.1168 ]



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