Multiple Choice
In the context of analytical techniques, what is the primary purpose of using a flask in an experiment?
15. Analytical Techniques:IR, NMR, Mass Spect
Purpose of Analytical Techniques
Back15. Analytical Techniques:IR, NMR, Mass Spect
Purpose of Analytical Techniques
- Multiple ChoiceWhat is the primary purpose of using analytical techniques in organic chemistry?
- Multiple ChoiceWhat was the primary purpose of the Miller-Urey experiment in the context of organic chemistry?
- Multiple ChoiceWhich of the following best describes the purpose of preparatory reactions in analytical techniques?
- Multiple ChoiceIn the context of analytical techniques, what is the primary purpose of a positive control?
- Multiple ChoiceWhat was the primary purpose of the Miller-Urey experiment in the context of analytical techniques in organic chemistry?
- Multiple ChoiceWhat is the primary purpose of the four postulates in analytical techniques?
- Multiple ChoiceWhat is the primary purpose of using a streak plate in analytical techniques?
- Multiple ChoiceWhy are polyacrylamide gels preferred over agarose gels for analyzing protein fractions?
- Multiple ChoiceWhich is the highest energy electromagnetic radiation?
- Multiple ChoiceWhich is the lowest energy electromagnetic radiation?
- Textbook Question
A student obtained two products from the reaction of 1,3-cyclohexadiene with Br2 (disregarding stereoisomers). His lab partner was surprised when he obtained only one product from the reaction of 1,3-cyclohexadiene with HBr (disregarding stereoisomers). Account for these results.
- Textbook Question
Draw the expected results of a DEPT sequence for the molecules shown.
(a)
- Textbook Question
Draw the expected results of a DEPT sequence for the molecules shown.
(b)
- Textbook Question
With information from the ¹H NMR and the ¹³C DEPT spectra, structure elucidation becomes even easier. Provide the structure that corresponds to the following data. [The identity of the carbons comes from the DEPT experiment.]
C₆H₁₁BrO₂
IR: 1745 cm ⁻¹
¹H NMR: δ 1.25 (t, 3H), 2.18 (quint, 2H), 2.58 (t, 2H), 3.46 (t, 2H), 4.15 (q, 2H)
¹³C NMR: δ 14.2 (CH₃) , 27.8 (CH₂) , 32.5 (CH₂) , 32.6 (CH₂) , 60.5 (CH₂) , 172.4 (C)