138611-01-5Relevant articles and documents
Unusual Topochemical Cycloadditions of 3-Cyano- and 4-Cyano-cinnamic Acids: Temperature Dependent Solid State Photochemical Reactions
Dhurjati, Mudigonda S. K.,Sarma, Jagarlapudi A. R. P.,Desiraju, Gautam R.
, p. 1702 - 1703 (1991)
The seeming difference in the topochemical photoreactivity of 3-cyanocinnamic acid 1 and 4-cyanocinnamic acid 2 is caused by differing degrees of ease of molecular motion in the crystals and the unreactive 1 becomes reactive when heated to 130 deg