Excited State Energy Distribution and Redistribution and Chemical Reactivity; Mechanistic and Exploratory Organic Photochemistry J. Am. Chem. Soc. 2000, 122, 952−953.

Dramatic Effects of Crystal Morphology on Solid State Reaction Course;1 Control by Crystal Disorder; Mechanistic and Exploratory Organic Photochemistry

“…Thus, crystal constraints control the reaction regioselectivity to the extent that in the case of crystal B extra electronic stabilization of 2.5 kcal/mol for the cyanophenyl bridged species is overridden.

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