Organic Chemistry
8th Edition
ISBN: 9781305580350
Author: William H. Brown, Brent L. Iverson, Eric Anslyn, Christopher S. Foote
Publisher: Cengage Learning
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Chapter 22, Problem 22.29P
(a)
Interpretation Introduction
Interpretation:
The mechanism for the displacement of a chlorine from cyanuric chloride by
(b)
Interpretation Introduction
Interpretation:
The mechanism for the displacement of a chlorine from cyanuric chloride by
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A problem in dyeing fabrics is the degree of fastness of the dye to the fabric. Many of
the early dyes were surface dyes; that is, they did not bond to the fabric, with the result
that they tended to wash off after repeated laundering. Indigo, for example, which gives
the blue color to blue jeans, is a surface dye. Color fastness can be obtained by bonding
a dye to the fabric. The first such dyes were the so-called reactive dyes, developed in
the 1930s for covalently bonding dyes containing-NH, groups to cotton, wool, and
silk fabrics. In the first stage of the first-developed method for reactive dyeing, the dye
is treated with cyanuric chloride, which links to the fabric through the amino group
of the dye. The remaining chlorines are then displaced by the-OH groups of cotton
(cellulose) or the-NH, groups of wool or silk (both proteins).
CI
-Cotton
Dye-NH,
Но-Сotton
N'
CI
CI
Dye-NH
CI
Dye-NH
'N.
0-Cotton
Cyanuric chloride
A reactive dye
Dye covalently
bonded to cotton
Propose a…
A) Phenol Red is a weakly acidic dye which is yellow in the HA form and red in the A form. What concentration of Phenol Red is required to obtain an absorbance of 0.50 at 550 nm at pH 7.8?
Note: ε550 of A = 2.5 x 104 M-1 cm-1; ε550 of HA = 0; pKa = 7.8.
B) What would the absorbance of the solution in part (a) be if the pH was 8.8?
Alcohols are acidic in nature. Therefore, a strong base can
abstract the acidic hydrogen atom of the alcohol in a process
known as deprotonation. The alcohol forms an alkoxide ion by
losing the proton attached to the oxygen atom of the hydroxyl (
-OH) group. The alkoxide formed can act as a base or a
nucleophile depending on the substrate and reaction conditions.
However, not all bases can abstract the acidic proton of alcohols
and not all alcohols easily lose the proton. Deprotonation
depends on the strength of the base and the acidity of the
alcohol. Strong bases, such as NaNH2, can easily abstract a
proton from almost all alcohols. Likewise, more acidic alcohols
lose a proton more easily.
Determine which of the following reactions would undergo deprotonation based on the strength of the base and the acidity of the alcohol.
Check all that apply.
► View Available Hint(s)
CH3CH,OH + NH3 →CH,CH,O-NH
CH3
CH3
H3C-C-H+NH3 → H3 C-C-H
OH
O-NH
CH3CH2OH + NaNH, → CH3CH,O-Na* + NH3
CHC12
Cl₂…
Chapter 22 Solutions
Organic Chemistry
Ch. 22.1 - Prob. 22.1PCh. 22.1 - Write a structural formula for the product from...Ch. 22.1 - Prob. 22.3PCh. 22.2 - Prob. 22.4PCh. 22.2 - Predict the major produce(s) of each electrophilic...Ch. 22.3 - In SN2 reactions of haloalkanes, the order of...Ch. 22 - Prob. 22.8PCh. 22 - Prob. 22.9PCh. 22 - Addition of m-xylene to the strongly acidic...Ch. 22 - Addition of tert-butylbenzene to the strongly...
Ch. 22 - What product do you predict from the reaction of...Ch. 22 - Other groups besides H+ can act as leaving groups...Ch. 22 - Prob. 22.14PCh. 22 - Prob. 22.15PCh. 22 - Prob. 22.16PCh. 22 - Prob. 22.17PCh. 22 - Suggest a reason why the nitroso group, N=O, is...Ch. 22 - Prob. 22.19PCh. 22 - Prob. 22.20PCh. 22 - The following molecules each contain two aromatic...Ch. 22 - Prob. 22.22PCh. 22 - Prob. 22.23PCh. 22 - The insecticide DDT is prepared by the following...Ch. 22 - Prob. 22.25PCh. 22 - Prob. 22.26PCh. 22 - Prob. 22.27PCh. 22 - Prob. 22.28PCh. 22 - Prob. 22.29PCh. 22 - Prob. 22.32PCh. 22 - Show how to prepare each compound from...Ch. 22 - Prob. 22.34PCh. 22 - Show reagents and conditions to bring about the...Ch. 22 - Prob. 22.36PCh. 22 - Propose a synthesis for each compound from...Ch. 22 - The first widely used herbicide for the control of...Ch. 22 - The first widely used herbicide for the control of...Ch. 22 - Prob. 22.40PCh. 22 - Prob. 22.41PCh. 22 - Prob. 22.42PCh. 22 - Prob. 22.43PCh. 22 - Cancer of the prostate is the second leading cause...Ch. 22 - Prob. 22.45PCh. 22 - Prob. 22.46PCh. 22 - Prob. 22.47PCh. 22 - When certain aromatic compounds are treated with...Ch. 22 - Prob. 22.49PCh. 22 - Following is the structure of miconazole, the...Ch. 22 - Prob. 22.51PCh. 22 - Prob. 22.52PCh. 22 - Prob. 22.53PCh. 22 - Show how the antidepressant venlafaxine (Effexor)...Ch. 22 - Prob. 22.57PCh. 22 - Given this retrosynthetic analysis, propose a...Ch. 22 - Prob. 22.59PCh. 22 - Prob. 22.60PCh. 22 - Prob. 22.61PCh. 22 - A newer generation of antipsychotics, among them...Ch. 22 - Prob. 22.63P
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