Warrener, R.N.McCay, I.W.Tan, R.Y.S.Russell, R.A.2014-10-032014-10-031979Tetrahedron Letters: the international journal for the rapid publication of all preliminary communications in organic chemistry, 1979; 20(34):3183-31860040-40391873-3581http://hdl.handle.net/2440/85853Two new crystalline bicyclo[4.2.0]octa-2,4,7-trienes have been prepared by photodecarbonylation of the appropriate tricyclo[4.2.1.0²,⁵]nona-3,7-dien-9-ones and their structures confirmed by ¹³C-n.m.r. The title compounds all undergo thermal ring opening to cyclooctatetraenes, but photolysis is substituent dependent.en© Pergamon Press Ltd. 1979.Journal article003000921410.1016/S0040-4039(01)95357-2A1979HH170000192-s2.0-49249148879102262