Indicate whether the following cyclization, conducted under thermal conditions, is symmetry allowed. Justify your answer by showing whether the overlapping orbitals in the transition state generate a symmetry-allowed or symmetry-forbidden scenario. Treat ethylene as the nucleophile. 
Definitions:
Contingency Theory
A leadership theory that proposes the effectiveness of a leader is contingent upon how well the leader's style matches the circumstances.
Contact Hypothesis
A theory which posits that under certain conditions, interpersonal contact is one of the most effective ways to reduce prejudice between majority and minority group members.
Operant Behavior
Behavior that operates on, or manipulates, the environment.
Respondent Behavior
Behavior that occurs as an automatic response to some stimulus, often conditioned by previous experiences.
Q10: How many electrons populate the π molecular
Q12: Provide the major organic product(s) in the
Q27: Provide a detailed, stepwise mechanism for the
Q41: Predict the number of distinct quartets expected
Q42: Provide the name of the major organic
Q53: Which of the following compounds has the
Q55: Consider the equilibrium of each of the
Q80: Show how the carbon p orbitals overlap
Q83: Show how propyl cyclopentyl ether can be
Q103: Provide the major organic product of the