Mass spectral analysis of 3,3-dimethyl-2-butanone results in several fragmentation pathways. Complete the mechanism and draw the products for the fragmentation pathway that produces a mass spectrum peak at m/z 43. Include all nonbonding electrons and charges ,. a-cleavage CH, radical cationic intermediate a-cleavage products HEC CH Add electrons and the charge for the resulting radical cationic intermediate, and add curved arrows for the a-cleavage mechanism en route to miz 43. Draw the a-cleavage products (one cation and one neutral radical) that are consistent with a peak at m/z 43. Include all nonbonding electrons. - EO. HC CH HC