14C_s11_lec01_e02

14C_s11_lec01_e02 - Chemistry 14C Lecture 1 Spring 2011...

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Chemistry 14C Lecture 1 Spring 2011 Exam 2 Page 1 Page 1 score = Liquid hand soap is a complex mixture of as many as 25 different ingredients. Four of these ingredients are shown below. N O N H H Cl Cl Cl O OH Cl Cl Cl Triclocarban C 13 H 9 Cl 3 N 2 O Antibacterial and antifungal compound Triclosan C 12 H 7 Cl 3 O 2 Antibacterial and antifungal compound C C Br N Br N N N COOH COOH HOOC HOOC Metacide 38 C 6 H 6 Br 2 N 2 Preservative EDTA C 10 H 16 N 2 O 8 Improves product performance in hard water Questions 1–3 concern the mass spectrum of triclocarban. 1. (2) Write an integer in the blank. m/z for M = __________. 2. (2) When the relative abundance of the M+1 peak is 7.6%, the relative abundance of the M peak is closest to (circle one): 10% 30% 50% 70% 90% 100% 110% 130% 150% 170% 190% 200% 3. (3) The mass spectrum includes a large peak at m/z = 161. What might this peak be? Circle one answer in each set. (a) Molecular ion: Yes No Cannot determine (b) Base peak: Yes No Cannot determine (c) Fragment ion: Yes No Cannot determine
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Chemistry 14C Lecture 1 Spring 2011 Exam 2 Page 2 Page 2 score = 4. (6) Using the scale shown below, sketch the IR spectrum of triclocarban. Label each peak with the corresponding bond and name of functional group (i.e., alkyl C–H). Neatness and accuracy count. Be specific . Hint: Practice on the back of the spectroscopy data table pages before sketching your final answer here 5. (8) Here is an IR spectrum of one or more hand soap ingredient. For each ingredient listed, write 'absent' or 'present' in the Absent or Present column. In the Determining Peak column write the approximate stretching frequency (single number or range), functional group name, and bond corresponding to the peak used to make
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This note was uploaded on 09/06/2011 for the course CHEM 140A taught by Professor Whiteshell during the Fall '04 term at UCSD.

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14C_s11_lec01_e02 - Chemistry 14C Lecture 1 Spring 2011...

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