FTIR spectra suggest that ionization of 2-exo-chloro-2-methylbenzonorb
ornene dagger in an SbF5 matrix at -196 degrees C leads to 2-methyl-2-
benzonortricyclyl cation which rearranges into a partially pi-bridged
2-methyibenzonorbornen-2-ylion at -123 degrees C.