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Стр. 1302
This accounts for its observed position 0.54 ppm upfield from the trans methyl group . The methyl bands do not coalesce at -30 ° C , where the ion undergoes ring opening and subsequent decomposition reactions .
This accounts for its observed position 0.54 ppm upfield from the trans methyl group . The methyl bands do not coalesce at -30 ° C , where the ion undergoes ring opening and subsequent decomposition reactions .
Стр. 1304
Alkylarylcarbonium Ions The observation of benzyl cations in acid solutions was also recently achieved ( 68 ) . Although the unsubstituted benzyl cation is still elusive , we have observed many substituted derivatives .
Alkylarylcarbonium Ions The observation of benzyl cations in acid solutions was also recently achieved ( 68 ) . Although the unsubstituted benzyl cation is still elusive , we have observed many substituted derivatives .
Стр. 1309
Even protonated carbamic acid and its derivatives can be readily obtained and observed in the superacid media ( 119 ) . Alkyl carbamates are found to be protonated on the carbonyl group , giving ions analogous to the alkyl carbonates .
Even protonated carbamic acid and its derivatives can be readily obtained and observed in the superacid media ( 119 ) . Alkyl carbamates are found to be protonated on the carbonyl group , giving ions analogous to the alkyl carbonates .
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