Photochemical transformations of small ring compounds. XLI. Orbital symmetry and steric control in the photorearrangement of 1,3,5-hexatrienes to bicyclo[3.1.0]hex-2-enes
Photochemical transformations of small ring compounds. XLI. Orbital symmetry and steric control in the photorearrangement of 1,3,5-hexatrienes to bicyclo[3.1.0]hex-2-enes