Carbocations dialkoxy

Carbenes (Continued) substituents on, 115 Carbocations, 105-108 acids and electrophiles, 97 dialkoxy, 105 ethyl, 84 fluoro, 105 norbornyl, 84 reactions, 107 substituents on, 106... 

Triplet-excited nitrobenzyl acetals 18-19 were proposed to undergo direct carbon-carbon bond photoheterolysis to generate the nitrobenzyl carban-ion and the corresponding a-dialkoxy carbocation [Eq. (7)] [81,82]. Transient spectra obtained following laser flash photolysis of 19 showed the formation of the /7-nitrobenzyl anion and the oxocarbocation [83] ... 

In other examples, biphotonic ionization of 2,3-dimethyl-2,3-diphenyl-butane (bicumene) in TFE gives the bicumene radical cation which undergoes carbon-carbon fragmentation to yield the cumyl cation and cumyl radical [87]. Photoinduced electron transfer from 2,2-dialkyldioxolanes to tetra-cyanoanthracene gives radical cations which fragment to yield dialkoxy carbocations and alkyl radicals [88]. Benzyl acetals were subjected to two-pho-... 

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