14C_s10_lec01_e02

14C_s10_lec01_e02 - Chemistry 14C Lecture 1 Spring 2010...

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Chemistry 14C Lecture 1 Spring 2010 Exam 2 Page 1 Page 1 score = Questions 1–12 refer to the spectroscopy of the molecules shown on the data table sheets. 1. (2) Circle all molecule(s) whose mass spectrum contains an M peak with an even m/z. PETN RDX TNT TATP DMDNB Plasticizer Cannot determine None of these 2. (2) Circle the molecule for which M has the highest m/z. PETN RDX TNT TATP DMDNB Plasticizer Cannot determine 3. (2) Circle the molecule whose mass spectrum contains the M+2 ion with the largest relative abundance. Assume the relative abundance of M is 100% in each spectrum . PETN RDX TNT TATP DMDNB Plasticizer Cannot determine 4. (2) Circle the molecule whose mass spectrum has the base peak with the largest relative abundance. PETN RDX TNT TATP DMDNB Plasticizer None of these All of these 5. (2) Circle the molecule with the greatest number of DBE. PETN RDX TNT TATP DMDNB Plasticizer Cannot determine 6. (2) Circle the molecule(s) that have peaks at 3050 cm -1 and 2950 cm -1 in the infrared spectrum. Other peaks may also be present. PETN RDX TNT TATP DMDNB Plasticizer Cannot determine 7. (4) Consider the IR spectrum of the plasticizer. (a) Circle the peak(s) that are not present in this IR spectrum. 3410 cm -1 3069 cm -1 2932 cm -1 1729 cm -1 1680 cm -1 1581 cm -1 (b) Circle two bonds that give rise to the most intense peaks in this IR spectrum. sp 3 C–H sp 2 C–H C=O C–C
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Chemistry 14C Lecture 1 Spring 2010 Exam 2 Page 2 Page 2 score = 8. (6) Here is the IR spectrum of an impurity present in the plasticizer. 1646 cm
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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_s10_lec01_e02 - Chemistry 14C Lecture 1 Spring 2010...

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