Question

Non conjugated double bonds and optical exaltation

Answer 1

Answer:

Optical exaltation appears to be exhibited by a system of two conjugated ethylenic double bonds when these form part of an open chain (e.g. 2: 4-hexadiene) but not when they are built into a ring (e.g. 1: 3-cyclo- hexadiene). These effects of configuration on the optical properties of a conjugated system are discussed.