Abstract: The” orthogonal” dienes of the title,(Z, Z)-l and 6, having the planes of their double bonds at a dihedral angle not far from 90, serve as models for “conjugated” dienes lackin8 n- electron delocalization and for the transition state for interconversion of antiperiplanar (trans) and synperiplanar (cis or gauche) butadiene. Several effects on properties attributable to their nonplanar conformations are recorded. Structures are assigned to (Z)-3-methyl-4- ...
