The structure of polyurethane formed by the copolymerization of a diol with a diisocyanate is to be drawn. Concept introduction: The polymers (repeating structural units) are derived from the simple and reactive molecules, called as monomers. Depending upon the mode of polymerization , polymerization mainly occurs by addition and condensation polymerization reactions. Copolymerization reactions are defined as the reactions of two different monomers forming a copolymer . Polyurethane is formed by the copolymerization of diol with diisocyanate. To determine: The structure of polyurethane formed by the copolymerization of a diol with a diisocyanate.
The structure of polyurethane formed by the copolymerization of a diol with a diisocyanate is to be drawn. Concept introduction: The polymers (repeating structural units) are derived from the simple and reactive molecules, called as monomers. Depending upon the mode of polymerization , polymerization mainly occurs by addition and condensation polymerization reactions. Copolymerization reactions are defined as the reactions of two different monomers forming a copolymer . Polyurethane is formed by the copolymerization of diol with diisocyanate. To determine: The structure of polyurethane formed by the copolymerization of a diol with a diisocyanate.
Definition Definition Group of atoms that shape the chemical characteristics of a molecule. The behavior of a functional group is uniform in undergoing comparable chemical reactions, regardless of the other constituents of the molecule. Functional groups aid in the classification and anticipation of reactivity of organic molecules.
Chapter 22, Problem 167CP
Interpretation Introduction
Interpretation: The structure of polyurethane formed by the copolymerization of a diol with a diisocyanate is to be drawn.
Concept introduction: The polymers (repeating structural units) are derived from the simple and reactive molecules, called as monomers. Depending upon the mode of polymerization, polymerization mainly occurs by addition and condensation polymerization reactions. Copolymerization reactions are defined as the reactions of two different monomers forming a copolymer. Polyurethane is formed by the copolymerization of diol with diisocyanate.
To determine: The structure of polyurethane formed by the copolymerization of a diol with a diisocyanate.
bre
The reaction sequence shown in Scheme 5 demonstrates the synthesis of a
substituted benzene derivative Q.
wolsd works 2
NH2
NaNO2, HCI
(apexe) 13× (1
HNO3, H2SO4
C6H5CIN2
0°C
HOTE
CHINO₂
N
O
*O₂H (
PO
Q
Я
Scheme 5
2 bag abouoqmics to sounde odi WEIC
(i)
Draw the structure of intermediate O.
[2 marks]
to noitsmot od: tot meinedogm, noit so oft listsb ni zaupaib bas wa
(ii) Draw the mechanism for the transformation of aniline N to intermediate O.
Spoilage
(b)
[6 marks]
(iii) Identify the reagent X used to convert compound O to the iodinated compound
[tom E
P.
vueimado oilovonsa ni moitos nolisbnolov ayd toes ai tedw nisiqx
(iv) Identify the possible structures of compound Q.
[2 marks]
[2 marks]
[shom 2]
(v)
bus noires goiribbeolovo xnivollot adj to subora sidab
Draw the mechanism for the transformation of intermediate P to compound Q.
[5 marks]
vi
(vi) Account for the regiochemical outcome observed in the reaction forming
compound Q.
[3 marks]
PROBLEM 4 Solved
Show how 1-butanol can be converted into the following compounds:
a.
PROBLEM 5+
b.
d.
-C=
N
Which alkene is the major product of this dehydration?
OH
H2SO4
heat