Exam-1A-key - A CHE 204A/204A Spring 2009 Midterm Exam-1 N...

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A 1 CHE 204A/204A Spring 2009 Midterm Exam-1 February 11, 2009 Name: Person #: Signature: Problem Maximum points Actual points 1. 60 2. 10 3. 20 4. 10 5. 20 6. 30 7 . (extra credit) 10 Total maximum 160 Your total
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A 2 1. Circle the correct answer: (40 pts) (1) Which compound would be expected to show untense IR absorption at 1715 cm -1 ? a) (CH 3 ) 2 CHNH 2 ; b) 1-hexyne; c) 2-methylhexane d) (CH 3 ) 2 CHCOOH (2) Which compound would show a larger than usual M+2 peak? a) CH 3 CH 2 SCH 3 ; b) (CH 3 ) 2 CHNH 2 ; c) CH 3 CH 2 COOH d) CH 3 (CH 2 ) 2 CH 3 (3) Electromagnetic raditation in the region is used in 1 H NMR spectroscopy. a) radio wave; b) ultraviolet; c) infrared; d) microwave; e) X-ray (4) 13 C NMR is less sensitive than 1 H NMR because: a) carbon is much heavier than hydrogen; b) 12 C has no nuclear spin; c) the natural abundance of 13 C is ~100 times less than that of 1 H and the magnetogyric ratio of 13 C is only 1/4 of that of 1 H. d)
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This note was uploaded on 12/01/2009 for the course CHE 179582 taught by Professor Rzayev during the Spring '09 term at SUNY Buffalo.

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Exam-1A-key - A CHE 204A/204A Spring 2009 Midterm Exam-1 N...

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