That the CH2 group of (E)-9b (which contains no aryl ortho substituent) produced a simple quartet at 4.22 ppm supports this explanation, as does the appearance of the CH2 groups of cis-alkenes (Z)-5a, (Z)-6a, and (Z)-10a as first-order quartets (integration 2H), and the benzylCH2 group of (Z)-8a as a simple doublet (integration 2H).