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The photochemical reactions of methyl irans-hepta-2,6-dienoate (la), methyl trans,irans-octa-2,6-dienoate (lb), and

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meric alcohols 32. Analysis by glpc (3% Carbowax, 8 ft X 0.125 in., 120°, 25 cc/min of He) showed two peaks in a ratio of ca. 2:1. The mixture of carbinols was purified by preparative glpc (20% XF-1150, 10 ft X 0.125 in., 130°, 100 cc/min of He). Carbinols 32 have 5 (CC1,) 3.73 and 3.68 (doublets, J = 2.2 and 2.0 Hz, respectively, relative areas ca. 2:1, respectively, carbinol), 1.15, 1.12 (pair of equally intense singlets), and 1.07, 1.03 (pair of equally intense singlets, the former pair having ca. twice the area of the latter pair, methyls). The high resolution mass spectrum of 32 exhibits m/e 162.1040 (caled for CuHuO: 162.1045)."