Organic Chemistry Practice Exams (Summer 2007-Fall 2008)

Organic Chemistry Practice Exams (Summer 2007-Fall 2008) -...

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CHM 202 Summer II 2007 EXAM ONE (Total 100 points) Name__ MODEL ANSWERS _ Section A Multiple Choice: SCANTRON, DO ALL QUESTIONS (2 points each = 80 points) 1. Which is the fingerprint region of an IR spectrum a b c d e a) b) c) d) e) 2. Broadening of an OH absorption is due to? a) bond polarity b) deprotonation c) hydrogen bonding d) solvent effects e) Beers law Note: Questions 3-6 refer to the following IR spectrum (i) (ii) (iii) 1600 cm -1 1690 cm -1 3 What functional group is responsible for the two peaks labeled (i)? a) CH O b) CO 2 H c) OH d) NH e) C=C-H 4 What functional group is responsible for the peak labeled (ii)? a) C-O b) O-H c) C=O d) C=C e) N-H 5 What functional group is responsible for the peak labeled (iii)? a) C-O b) C C c) C=O d) Ph e) N-C 6 Which of the following compounds fits the spectrum? O N CH 3 CH 2 CH 2 CH 3 CHO NH 2 OCH 3 O O I II III IV V a) I b) II c) III d) IV e) V 7. Which of the following compounds would show a single peak in the 1 H NMR a) ethyl bromide b) acetic acid c) 1,2-dibromoethane d) methanol e) 1.2-dimethoxyethane 8. The molecule CH 2 =CHCH 2 CO 2 H will show how many 1 H- NMR signals? a) 2 b) 4 c) 5 d) 6 e) 7 9. The molecule trans- PhCH=CHCHO will show how many 1 H-NMR signals? a) 3 b) 4 c) 5 d) 6 e) 7 10. In the 1 H-NMR spectrum of the following compound, which of the indicated protons would appear farthest downfield? CH 2 C O CH 2 OCH 3 CH CH 3 Cl a) b) c) d) e) 11. How many 1 H NMR signals would 1,2-dimethoxybenzene give? a) 1 b) 2 c) 3 d) 4 e) 5 12. All NMR spectra are referenced to: a) CDCl 3 b) water c) CH 3 OH d) TMS e) DMF 13. The spectrum below belongs to which compound? quartet
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Organic Chemistry Practice Exams (Summer 2007-Fall 2008) -...

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