Question

Extra credit 2 (8 pts) The above dimethyl-substituted hexatriene can undergo a ring-closing reaction called an electrocyclic reaction. Shown above are two possible products. In fact, only one of the two possible products is formed. This reaction is controlled by orbital symmetry. The key orbital is the HOMO of the triene, which must be converted to an MO of the product. That is, the terminal p lobes of the triene HOMO must twist to overlap and form a sigma bond. So, which one of the two possible products is formed? Illustrate why this product must be formed, using an orbital drawing.

Answer 1

The product formed. of From The FMO, Home of triene es turned P lobes to be form product- 8 & stwo to 8 RR O UR Disrotation R-groups twisted to side are seone