Principles of Instrumental Analysis
7th Edition
ISBN: 9781305577213
Author: Douglas A. Skoog, F. James Holler, Stanley R. Crouch
Publisher: Cengage Learning
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Question
Chapter 27, Problem 27.2QAP
Interpretation Introduction
Interpretation:
The working of a soap-bubble flow meter is to be stated.
Concept introduction:
Using a soap bubble flow meter, other types of flow rates are calibrated. This device has a tube made up of glass, rubber caps, a scale and a right angled connection provided with nose connectors. It indicates the flow rate by measuring the time taken by any gas to move across soap bubble.
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1. The following conversion includes chemistry we have covered very recently, some
chemistry from last term, and chemistry from the first chapter of this unit. Provide curly
arrows and an explanation for this mechanism. Use the reagents in the order given. You
do not need any other reagents.
1. NaOEt
OEt
2.
COOEt
COOEt
Step 1
Step 2
Step 3
COOEt
COOEt
COOH
Step 6
OH
Step 4
Step 7
(racemic)
cyclizes under
conditions (8)
OTS
Step 5
Step 8
ОН
OH
(racemic)
Frontalin
(racemic)
Shown above are the steps in one of the several published syntheses of Frontalin, a pheromone of the western pine beetle. From the choices provided, show
the reagents and conditions by which step 3 of this synthesis might be accomplished.
List the reagent(s) in order that will accomplish this transformation. No more than 4 steps are required. List your answer as a single letter (single-step
transformation) or a series of letters (multi-step transformation) with no commas separating them.
For example, "ab" corresponds to:
1. Eto Na+
2. NaOH, H₂O
NOTE: The order in which you list your letters matters!
Reagents:
a. Eto Na*
g. NaCN
b. NaOH, H₂O
h. SOCI₂
c. H3O+, heat
i. (CH3)2CuLi, ether, -78°C
d. LiAlH4
j. H₂O
e. p-TsCI, pyridine
k. RCO3H
f.
Br
I. H3O+
1,024
K
←
nationa
Login - Paymentivet
MapQue
Draw the major product of this reaction. Ignore inorganic
byproducts and the carboxylic acid side product.
N
1. excess LiAlH4
2. H₂O
✓
W
a
Chapter 27 Solutions
Principles of Instrumental Analysis
Ch. 27 - Prob. 27.1QAPCh. 27 - Prob. 27.2QAPCh. 27 - Prob. 27.3QAPCh. 27 - Prob. 27.4QAPCh. 27 - Prob. 27.5QAPCh. 27 - Prob. 27.6QAPCh. 27 - Prob. 27.7QAPCh. 27 - Prob. 27.8QAPCh. 27 - Prob. 27.9QAPCh. 27 - What are hyphenated GC methods? Briefly describe...
Ch. 27 - Prob. 27.11QAPCh. 27 - Prob. 27.12QAPCh. 27 - Prob. 27.13QAPCh. 27 - Prob. 27.14QAPCh. 27 - Prob. 27.15QAPCh. 27 - Prob. 27.16QAPCh. 27 - Prob. 27.17QAPCh. 27 - Prob. 27.18QAPCh. 27 - Prob. 27.19QAPCh. 27 - The same polar compound is gas chromatographed on...Ch. 27 - Prob. 27.21QAPCh. 27 - Prob. 27.22QAPCh. 27 - Prob. 27.23QAPCh. 27 - Prob. 27.24QAPCh. 27 - Prob. 27.25QAPCh. 27 - Prob. 27.26QAPCh. 27 - Prob. 27.27QAPCh. 27 - Prob. 27.28QAPCh. 27 - Why is GSC not used nearly as extensively as GLC?Ch. 27 - Prob. 27.30QAP
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