exam1summer02 - Chemistry 51 Exam 1 Summer 2002 This is a...

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Chemistry 51 Exam 1 Summer 2002 This is a closed book exam. All answers must appear on the answer sheet. This question sheet will not be collected. Write your name on both sides of the answer sheet now . 1. For each of the following equilibria predict if the equilibrium constant is greater than one (favoring products), equal to, or less than one (favoring reactants) A B. 2. Give two complete resonance structures for nitromethane, CH 3 NO 2 . Show lone pairs and formal charges. 3. Name the following compounds including configuration specification. A B 4. a)Draw a three dimensional representation of the transition state for Step 2 in the free radical halogenation of methane. b) What are the qualitative differences in the nature of the transition state if the halogen is chlorine or bromine? NH 2 - + H 2 O NH 3 + OH - CH 3 - + H 3 O + CH 4 + H 2 O H F H Br CH 2 OH CHO OH CO 2 H C 2 H 5 H H CO 2 H H F
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