VI11 I1 major photoproduct is derived from analysis of its spectra. The mass spectrum shows a molecular ion at mje 156 and the infrared spectrum (neat) indicates the presence of a monosubstituted olefin (10.10 and 10.93, u) as well as a methylene group (11.35 p). The latter absorption is comparable to that (11.51 p) reported for 1-methyleneindan. l 3 The nmr spectrum is essentially first order and shows: a four-proton multiplet at 6 7.05-7.65 ( ...
