343_clauss_quiz2_key

343_clauss_quiz2_key - Name 6 Chemistry 343 Summer 2003...

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Unformatted text preview: Name: 6 Chemistry 343 Summer 2003 Quiz 11 For each of the following, circle the letter which corresponds to the most correct answer. (2 points each) ' Which structure has the (8) configuration at the stereogenic center? . Ermx/m c! t, ' u.‘ Which of the following groups has the highest priority in the (RS) system? A: “JECH *“fjtefj C CH he B: I 3fl ‘3 _ CH? , *érfiercea D: -CH2-(CH2)5«CH3 These structures are H CH3 “firs/fer Hiya CH3 Br 6 a b g A: enantiomers. iastereomers. C: identical. D: None of the above. What is the relationship between (1 R.28)-dibromocyclohexane and (1 S,2R)—dibromocyclohexane? identical ’ " ’ " " ‘ « ' ~~ - 7 1: enantiomers ' ‘ c: 'diastereomersl D: constitutional isomers V What is the product of the following synthesis? 1 Consider the following molecule and the relevant energy for a single diaxial interaction in cyclohexane. Determine the MOST stable conformation of this molecule. @‘ ./ Which is the MOST stable conformation of 3,4—dimethylhexane? What is the correct IUPAC name of the following compound? M/AN‘N W‘xj/ A; 37propyl—4,5-dimelhyihexane B: 4-ethyi-5,6—‘dimethylheptaner~ C: _2,3~dimethyl~4-propylhexane 4-elhyl-2;3-dimethylheptane For the following trimethylcyclohexane redraw the molecule in its most stable chair conformation. Identify all stereogenic carbons (on your chair structure) with an asterisk and label each stereocenter as R or S. (4 points) ,5 (s) at: (1Q) Write out a step-by-step high yield synthesis for the following compound starting with compounds containing no more than six carbon atoms. Be sure to show complete reactions with all reactants and products for each step. (5 points) ——-——7 ///" \\/ 'l’ ME, Y + grep /\1/\ Q Mug 3) \ é NaUHL \ ...
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343_clauss_quiz2_key - Name 6 Chemistry 343 Summer 2003...

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