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CHM 202 Exam 2 Sum II 2007

CHM 202 Exam 2 Sum II 2007 - CHM 202 Summer II 2007 EXAM...

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CHM 202 Summer II 2007 EXAM TWO (Total 100 points) Name____________________ Section A Multiple Choice: SCANTRON, DO ALL QUESTIONS (2 points each = 80 points) 1. Which of the following would you expect to be aromatic? O a) b) c) d) 2. Cyclopropenyl cation has how many bonding ( π ) molecular orbitals? 3. In what orbitals are the lone pairs of electrons on the sulfur atom in thiophene? a) p and p b) sp and p c) s and p d) sp 2 and sp 2 e) sp 2 and p 4. For a compound to be aromatic, how many π electrons must be in the π system? 5. Which of the following molecules/species is NOT aromatic? 6. Which best describes the HOMO of cyclobutadiene? a) a half filled pair of non-bondng molecular orbitals b) a filled pair of non-bondng molecular orbitals c) a half filled pair of degenerate antibonding molecular orbitals d) a half filled pair of degenerate bonding molecular orbitals e) a filled pair of degenerate bonding molecular orbitals 7. How many π -electrons are in furan? 8. Anisole is the common name for? d) Ethylbenzene e) Methoxybenzene 9. How many isomeric chlorobenzenesulfonic acids are possible? 10. How many different difluorophenols are possible? a) 2 b) 4 c) 6 d) 8 e) 10
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