ORGANIC CHEMISTRY II FINAL EXAM Spring 2015 IRECTIONS: Please answer all questions in the space provided as completely and clearly as possible. ART I. Multiple Choice (2 points each) 1. Which of the following nuclei will have a magnetic moment? 2 A) D 16 B) 8O 12 C) 6C 32 D) 16S E) All 2. An unknown compound A has the molecular formula C,H,O₂. Based on the following 'H NMR spectru the structure of compound A? 2H simplet OH B) c) зн single зн single PPM 3. The 13C NMR spectrum of an unknown compound shows 4 absorptions and the 'H NMR spectrum sh absorptions. Which of the following compounds is the unknown compound? A) CH3 CH3 A) CH3 B) CH3 CH3 J CH3 D) CH3- -CH3 4. Which of the following compounds will have the longest wavelength absorption? B) c) 0 0 D) 5. Which of the following statements regarding 1,2- or 1,4-conjugate addition of HBr to 1,3-butadien A) The kinetic product, 3-bromo-1-butene, arises from the more stable carbocation intermediate. B) The thermodynamic product, 1-bromo-2-butene, is the more stable product. C) The kinetic product is favored by carrying out the reaction at high temperature. D) Formation of the two products arises from a common resonance stabilized carbocation intermediate.