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Cyclopropylcyclopropylidenemethyl cation

Fig. 4 100 MHz 13C NMR spectrum of cyclopropylcyclopropylidenemethyl cation 28 in S02C1F/S02F2 at -138 °C, reference N(CH3)4h c5 = 55.65 ppm, CH3-signal of tert-butyl cation,, 5 = 48.24ppm (C + -signal, <5 = 335.43ppm omitted). Inset (15-60ppm) CH- and CH2-signals of 28 only. Fig. 4 100 MHz 13C NMR spectrum of cyclopropylcyclopropylidenemethyl cation 28 in S02C1F/S02F2 at -138 °C, reference N(CH3)4h c5 = 55.65 ppm, CH3-signal of tert-butyl cation,, 5 = 48.24ppm (C + -signal, <5 = 335.43ppm omitted). Inset (15-60ppm) CH- and CH2-signals of 28 only.
Siehl and coworkers have prepared cyclopropylcyclopropylidenemethyl cation 37, by protonation of bis(cyclopropylidene)methane with FS03H-SbF5 at liquid nitrogen temperature (equation 31 )67. The vinyl cationic center is stabilized by the a-cyclopropyl group. [Pg.832]

See other pages where Cyclopropylcyclopropylidenemethyl cation is mentioned: [Pg.136]    [Pg.52]    [Pg.408]    [Pg.136]    [Pg.52]    [Pg.408]    [Pg.305]   
See also in sourсe #XX -- [ Pg.136 ]



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