The rigid or stronger polymer from the given pair of the polymer is to be identified. Concept introduction : The hydrogen bonding, the resonance effect, and the shorter bond length increase the stability of the polymer and hence the polymer becomes more rigid. To determine: The rigid or stronger polymer from the polymer of ethylene glycol and teraphthalic acid and the polymer of 1.2 − diminoethane and teraphthalic acid.
The rigid or stronger polymer from the given pair of the polymer is to be identified. Concept introduction : The hydrogen bonding, the resonance effect, and the shorter bond length increase the stability of the polymer and hence the polymer becomes more rigid. To determine: The rigid or stronger polymer from the polymer of ethylene glycol and teraphthalic acid and the polymer of 1.2 − diminoethane and teraphthalic acid.
Solution Summary: The author identifies the rigid or stronger polymer from the given pair of polymers. The amine group forms hydrogen bond with the carbonyl carbon within the molecule.
Definition Definition Large and very high-molecular-weight substances that consist of hundreds to thousands of repeating units. Polymers are also known as macromolecules. Number-average-molecular weight is the measuring system for the polymers.
Chapter 22, Problem 87E
(a)
Interpretation Introduction
Interpretation: The rigid or stronger polymer from the given pair of the polymer is to be identified.
Concept introduction: The hydrogen bonding, the resonance effect, and the shorter bond length increase the stability of the polymer and hence the polymer becomes more rigid.
To determine: The rigid or stronger polymer from the polymer of ethylene glycol and teraphthalic acid and the polymer of
1.2−diminoethane and teraphthalic acid.
(b)
Interpretation Introduction
Interpretation: The rigid or stronger polymer from the given pair of the polymer is to be identified.
Concept introduction: The hydrogen bonding, the resonance effect, and the shorter bond length increase the stability of the polymer and hence the polymer becomes more rigid.
To determine: The rigid or stronger polymer from the polymer of
6−hydroxyheptanoicacid and the polymer of
4−hydoxybenzoicacid.
(c)
Interpretation Introduction
Interpretation: The rigid or stronger polymer from the given pair of the polymer is to be identified.
Concept introduction: The hydrogen bonding, the resonance effect, and the shorter bond length increase the stability of the polymer and hence the polymer becomes more rigid.
To determine: The rigid or stronger polymer from the polyacetylene and polyethylene.
Q5: Label each chiral carbon in the following molecules as R or S. Make sure the stereocenter
to which each of your R/S assignments belong is perfectly clear to the grader. (8pts)
R
OCH 3
CI H
S
2pts for each R/S
HO
R
H
!!! I
OH
CI
HN
CI
R
H
Calculate the proton and carbon chemical shifts for this structure
A.
B.
b. Now consider the two bicyclic molecules A. and B. Note that A. is a dianion
and B. is a neutral molecule. One of these molecules is a highly reactive
compound first characterized in frozen noble gas matrices, that self-reacts
rapidly at temperatures above liquid nitrogen temperature. The other
compound was isolated at room temperature in the early 1960s, and is a
stable ligand used in organometallic chemistry. Which molecule is the more
stable molecule, and why?
Chapter 22 Solutions
WebAssign for Zumdahl/Zumdahl/DeCoste's Chemistry, 10th Edition [Instant Access], Single-Term