There are 50 questions on this examination. On the answer sheet provided outside my office, answer the 25 questions assigned to you. Answer no questions other than those assigned .
All questions are of equal value.
I understand that the penalty for cheating on this examination is to receive a non-replaceable score of zero. Sign your statement and date it. Pivalic acid forms esters that do not hydrolyze easily. The lowest energy conformation of esters of pivalic acid has at least one methyl group eclipsed, making it impossible to change the hybridization of the carbonyl carbon. Hyperconjugation stabilizes the ester more than anything else.