Repeat the above questions with a second structure for questions 4,5 and 6. The carbon in the CH 3 is sp 3 . The oxygen is also sp 3 . Circle the bonds that have pure sigma bond character. Circle all bonds that have some pi bond character.
All bonds involving the ring carbons have pi character.
Examine the structure shown above and predict the approximate bond angles indicated by the arcs. Note that in this two dimensional representation, we have made no attempt to approximate the three dimensional angles of the actual molecule.