CRYSTAL-STRUCTURE OF A NEW PRECURSOR OF RADICAL-CLOCK BASED ON THE NORBORNENYL FRAMEWORK

The crystal of -sulfonyl)-bicyclo[2-2-1]hept-5-ene-2-carbonitrile 1, a new radical-clock is described. The structure has confirmed the confi guration for the positions of the phenyl and sulfonyl groups. in the c rystal, the radical precursor carbon atom of the propane group is not neighbouring with the double bond of the norbornene. Nevertheless, in solution, it may be expected an ideal conformation with a short interg roup distance leading to a cyclization process. Crystal data: C17H19NO 2S; triclinic, space group <P(1)over bar>, a = 6.567 (3),b = 10.407(5) , c = 12.610(6), alpha = 110.48(2), beta = 95.88(2), gamma = 102.67(3) .