Results Unlike the diaryl sulfones, the parent ions of most of the alkyl alkanesulfonates (1) are scarce; usually they occur in about 1-3% abundance relative to the base (most abundant) peak. In general, the most abundant ions in the spectra are those arising from the alkyl group (2) obtained upon a cleavage. These fragmentation patterns are quite similar to those of most related alkyl structures, and are treated elsewhere.'Suffice it to say, all the ...