Isolation and the IR spectra of chloro- and bromo-ethyl cations in cryogenic SbF5 matrices

Reaction of MeCHCl2, CH2ClCH2Cl and CH2BrCH2Br respectively with SbF5 in a solid matrix at 77–200 K affords the most stable cations 2 and 3 as predicted by previously published high-level ab initio calculations.