30B_w04_e02

30B_w04_e02 - Chemistry 30B (a) Number of nitrogens: M (b)...

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Chemistry 30B Winter 2004 Exam 2 Page 1 1. (12 points) Circle the peak in the mass spectrum that best reveals…. . (a) Number of nitrogens: M M+1 M+2 Base peak More than one peak needed (b) Number of carbons: M M+1 M+2 Base peak More than one peak needed (c) Number of hydrogens: M M+1 M+2 Base peak More than one peak needed (d) Number of oxygens: M M+1 M+2 Base peak More than one peak needed (e) Presence of chlorine: M M+1 M+2 Base peak More than one peak needed (f) Molecular weight: M M+1 M+2 Base peak More than one peak needed 2. (12 points) List four different ways spectroscopy can be used to differentiate between an aldehyde and a ketone. Write the spectroscopy type, and a single sentence (or a clear but simple illustration) in each aldehyde and ketone box. See the example. Spectroscopy Aldehyde Ketone IR All aldehydes are pink. All ketones are blue.
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Chemistry 30B Winter 2004 Exam 2 Page 2 3. (4 points) Calculate the DBE for C 7 H 6 BrNO. Show your work. What does this number reveal about the structure of this compound? Be specific. Calculation: Information: 4. (15 points) Identify or describe each term in one sentence or less. Be specific. (a) Fingerprint region: (b) DEPT: (c) TMS: (d) Upfield: (e) The characteristic chemical shift range for aromatic hydrogens:
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Chemistry 30B Winter 2004 Exam 2 Page 3 5. (9 points): Finish each sentence about infrared spectroscopy in ten words or less.
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This note was uploaded on 08/11/2010 for the course CHEM CHEM 30B taught by Professor Maynard during the Winter '08 term at UCLA.

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30B_w04_e02 - Chemistry 30B (a) Number of nitrogens: M (b)...

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