Solid-state photodimerization of 1,2-bis(5′-pyrimidyl)ethene
The photodimerization of 1,2-bis(5′-pyrimidyl)ethene in the solid state is reported. Photolysis of the crystalline solid formed on self-assembly of 1,2-bis(5′-pyrimidyl)ethene and C-methylcalixresorcinarene and photolysis of the solid recystallized from dichloromethane yielded cis-anti-cis-1,2,3,4-tetrakis(5′-pyrimidyl)cyclobutane as the only product. Single-crystal X-ray analysis of each of these solids confirms that the alkenes are π-stacked, colinear, and separated by less than 4.2 Å.
[2+2] cycloaddition, Crystal structure, Photolysis, Solid state
Bosch, Eric, Julie M. Matheny, and Nigam Rath. "Solid‐State Photodimerization of 1, 2‐Bis (5′‐pyrimidyl) ethene." Synthetic Communications 37, no. 21 (2007): 3835-3839.