Our results reveal that in a large number of cases, the dissipation of energy from parent butadiene dication starts with the emission of one or more neutral particles (H/H 2 /C 2 H 2 ) followed by a two-body breakup of the daughter dications into singly charged fragments. We observe that most of these daughter dications break into several different fragment pairs which can only result from hydrogen scrambling. The high propensity of multiple neutral emission is highlighted and discussed. Our study indicates that formation of ionic precursors can open up a rich chemistry of unsaturated carbons involving multiple structures with broad fragmentation time-scales and energetically accessible pathways for evolution . With a very high propensity for neutral particle emission, such ions can also play a significant role in contributing to the H/H 2 concentration in astrophysical environments.