ORGANIC CHEMISTRY MASTERINGCHEM ACCESS
9th Edition
ISBN: 9780137249442
Author: Wade
Publisher: INTER PEAR
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Chapter 5.4D, Problem 5.8P
Interpretation Introduction
Interpretation: The specific rotation of (+)-glyceraldehyde is to be calculated on the basis of given information.
Concept introduction: Physical properties of a compound like boiling point, density affects the angular rotation of polarized light by a chiral compound. The concentration of the compound affects the rotation of polarized light in Polarimeter. The rotation is also dependent upon the length of the cell and optical activity of the compound.
To determine: The specific rotation of (+)-glyceraldehyde on the basis of given information.
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An aqueous solution containing 9.01 g of an optically-pure compound was diluted to 6.00 × 102 mL with water and
placed in a 10.0 cm long polarimeter tube. The measured rotation was -4.13° at 25° C. Calculate the specific rotation of
the compound.
[a=
The acid-catalyzed hydrolysis of sucrose, C12H22O11 + H₂O + H+ -> C6H12O6 + C6H12O6
+ H+ is known as "inversion of sucrose" because the angle, a, by which the solution
rotates polarized light changes from positive to negative as the reaction proceeds
(data from 30 degree C):
t/hr
a
0
78
2
71
4
12
18
24
42
65.10 44.60 32.40 22.45 2.30
48
-1.96
61
-9
86
95
-15.80 -17.25 -21.15
∞
Use this data to show that the reaction is first order and determine its rate coefficient
(at 30 degree C).
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Chapter 5 Solutions
ORGANIC CHEMISTRY MASTERINGCHEM ACCESS
Ch. 5.2 - Determine whether the following objects are chiral...Ch. 5.2A - Prob. 5.2PCh. 5.2B - Prob. 5.3PCh. 5.2B - Prob. 5.4PCh. 5.2C - Prob. 5.5PCh. 5.3 - Prob. 5.6PCh. 5.3 - Prob. 5.7PCh. 5.4D - Prob. 5.8PCh. 5.4D - Prob. 5.9PCh. 5.4D - Prob. 5.10P
Ch. 5.5 - Prob. 5.11PCh. 5.7 - When optically pure (R)-2-bromobutane is heated...Ch. 5.7 - Prob. 5.13PCh. 5.8 - Prob. 5.14PCh. 5.9B - Draw three-dimensional representations of the...Ch. 5.10A - For each sot of examples, make a model of the...Ch. 5.10A - Draw a Fischer projection for each compound....Ch. 5.10B - Prob. 5.18PCh. 5.10C - For each Fischer projection, label each asymmetric...Ch. 5.11C - Prob. 5.20PCh. 5.13 - Prob. 5.21PCh. 5.13 - Prob. 5.22PCh. 5.15 - Prob. 5.23PCh. 5.16A - Prob. 5.24PCh. 5 - The following four structures are naturally...Ch. 5 - For each structure, 1. star () any asymmetric...Ch. 5 - Prob. 5.27SPCh. 5 - Prob. 5.28SPCh. 5 - Prob. 5.29SPCh. 5 - Prob. 5.30SPCh. 5 - Prob. 5.31SPCh. 5 - Prob. 5.32SPCh. 5 - Prob. 5.33SPCh. 5 - Prob. 5.34SPCh. 5 - For each structure, 1. draw all the stereoisomers....Ch. 5 - Prob. 5.36SPCh. 5 - Prob. 5.37SPCh. 5 - 3,4-Dimethylpent-1-ene has the formula...Ch. 5 - A graduate student was studying enzymatic...Ch. 5 - Prob. 5.40SPCh. 5 - Prob. 5.41SP
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