“…By comparison of the spectral properties of this mixture with the mixture derived from the trans diene, the following spectral properties of 3b were inferred. 3b: nmr (CDC13) 1.11 (d, J= 6.5 Hz, methyl), 1.6 (m, Hg), 2.5 (m, Hs), 2.94 (m, methylene), 5.01 (d of d, J = 6 and 9 Hz, He), 5.7-6.2 (m, H2, Hg, Hg, H10), 6.54 (asym t, H3, H4); ir (neat) essentially same as 3a; mass spectrum m/e (rel intensity) 158 (50), 143 (100), 129 (68), 128 (91), 115 (42). Oxidation precluded a satisfactory elemental analysis.…”