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Unformatted text preview: CHEM 241 Synthesis & Reactivity I Exam #1 - February 13, 2006 Name:_____KEY ____________ Lab Section: M T F This exam ends at 9:25 am as indicated by the clock in Althouse 108. In the space provided, give the best answer (3 points each) __ A __ 1. Which of the following is not an isomer of C 6 H 10 ? CH 3 a) b) c) d) HC C __ B __ 2. What is the correct IUPAC name for the following compound? Cl a) 3-chloro-4-ethyl-2-isopropylhexane b) 4-chloro-5-ethyl-2,3-dimethylheptane c) 3-chloro-4-ethyl-1,1,2-trimethylhexane d) 4-chloro-3-ethyl-2-isopropylhexane __ B __ 3. pK a values of a series of compounds are listed below. Which would be deprotonated by NaOH? NH 3 CH 3 CO 2 H (CH 3 ) 3 COH pK a 25 4.7 18 33 A B C D HC CH __ C __ 4. Which of the following is not a resonance structure of the cation at left? OCH 3 a) b) c) d) OCH 3 OCH 3 OCH 3 OCH 3 __ D __ 5. Which of the structures below contains an oxygen with a formal charge of +1? CH 3 OH O : : O : : a) b) c) d) CH 3 O : : : CH 3 O CH 3 CH 3 : __ D __ 6. The three staggered conformations of 2-methylbutane are shown below: I II III CH 3 H CH 3 CH 3 H H CH 3 H CH 3 H H CH 3 CH 3 H CH 3 H CH 3 H Which structure represents the most populated conformation? Which structure represents the most populated conformation?...
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This note was uploaded on 04/17/2008 for the course CHEM 241 taught by Professor Crouch during the Spring '08 term at Dickinson.
- Spring '08