Abstract
The 30-fold difference in reactivity of the isomorphous crystals of 2,5-distyrylpyrazine (DSP) and 1,4-bis-(3-pyridyl-2-vinyl)benzene (P2VB), two isoelectronic and nearly structurally identical molecules, has remained an important problem in organic solid-state chemistry. This disparity of oligomerization rates in the solid state is further accentuated by the fact they have similar rates of reaction in solution. The differences in reactivity of these molecular crystals cannot be explained from topochemical considerations. To more completely understand the discrepancy of reactivity of these archetypical photochemical solid-state reactions, the oligomerization of DSP has been reexamined
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