Question

Which polymer describes tail - to - tail addition?

• A. $-C{H}_2-\underset{X}{\underset{|}{CH}}-C{H}_2-\underset{CH}{\underset{|}{X}}-$
• B. $-\underset{X}{\underset{|}{CH}}-C{H}_2-C{H}_2-\underset{X}{\underset{|}{CH}}-$
• C. $-C{H}_2-\underset{X}{\underset{|}{CH}}-\underset{X}{\underset{|}{CH}}-C{H}_2-$
• D. All of the above

Answer 1

Answer: (B)

$-\underset{X}{\underset{|}{CH}}-C{H}_2-C{H}_2-\underset{X}{\underset{|}{CH}}-$

In tail to tail polymerization, $-X$ is located such that it is separated by $H$ atoms.

i.e, $-\underset{|}{CH}-{CH}_2-{CH}_2-\underset{|}{CH}-$

$X$ $X$