MT 1 - ORG CHEM 2

MT 1 - ORG CHEM 2 - Name: _ Date: _ 1. How many 13C signals...

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Name: __________________________ Date: _____________ 1. How many 13 C signals would 1,2-dimethylbenzene give? A) 1 B) 2 C) 3 D) 4 E) 5 2. A downfield ( ! 9-10) singlet is observed in the 1 H NMR spectrum of: A) CH 3 CCH 2 CH 3 O D) (CH 3 ) 3 CC O H B) C 6 H 5 CH 2 CO H E) C 6 H 5 CH 2 CCH 3 O C) (CH 3 ) 2 CHC O H 3. Consider the expected splitting of signal “c ” in the 1 H NMR spectrum of 2-ethyl-1-butanol, shown below. Presuming that J bc is sufficiently different from J cd and that the instrument has sufficient resolving power, what is the theoretical multiplicity of signal “c ”? OH a b d ce a b A) 6 B) 7 C) 8 D) 12 E) 15 4. Predict the base peak for 2-chloro-2-methylpropane A) m /z 15 B) m /z 92 C) m /z 43 D) m /z 57 E) m /z 77 5. Consider the expected 1 H NMR spectrum of 2,4-dimethyl-1,4-pentadiene. Which of the following is likely to be observed? A) 7 signals: all singlets D) 3 signals: one singlet, 2 doublets B) 4 signals: all singlets E) 4 signals: two singlets, two doublets C) 3 signals: all singlets Page 1
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6. What is the theoretical multiplicity of the C-2 proton signal in the 1 H NMR spectrum of 2- hydroxymethyl-1,3-propanediol, shown below? OH HO OH A) 1 B) 6 C) 7 D) 8 E) 9 7. An oxygen-containing compound shows strong IR absorption at 1630-1780 cm -1 and 3200-3550 cm -1 .
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This note was uploaded on 08/05/2010 for the course CHEM CHEM 222 taught by Professor Davidharpp during the Winter '09 term at McGill.

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MT 1 - ORG CHEM 2 - Name: _ Date: _ 1. How many 13C signals...

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