Polymers Question 26
Question: In the natural rubber -Caoutchouc-, the isoprene units are joined by
Options:
A) Head-to-head
B) Tail-to-tail
C) Head-to-tail
D) All of these
Show Answer
Answer:
Correct Answer: C
Solution:
$ \overset{Head}{\mathop{CH_2}}=\underset{CH_3}{\mathop{\underset{|}{\mathop{C-}}}}CH=\overset{Tail}{\mathop{CH_2}}+\overset{Head}{\mathop{CH_2}}=\underset{CH_3}{\mathop{\underset{|}{\mathop{C-CH}}}}=\overset{Tail}{\mathop{CH_2}}\to $
$ {{(-CH_2-\underset{CH_2}{\mathop{\underset{|}{\mathop{C=}}CH}}-CH_2-CH_2-\underset{CH_3}{\mathop{\underset{|}{\mathop{C=}}CH}}-CH_2-)} _{n}} $ From steric effects, the polymer formed has head to tail configuration.
BETA
