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NEET · Chemistry · STD 11 -p-Block elements - I

Which of these is not a monomer for a high molecular mass silicone polymer ?

  1. A \(Me_3SiCl\)
  2. B \(PhSiCl_3\)
  3. C \(MeSiCl_3\)
  4. D \(Me_2SiCl_2\)
Verified Solution

Answer & Solution

Correct Answer

(A) \(Me_3SiCl\)

Step-by-step Solution

Detailed explanation

\(Me_3SiCl\) is not a monomer for a high molecular mass silicone polymer because it generates \(Me_3SiOH\) when subjected to hydrolysis which contains only one reacting site. Hence, the polymerization reaction stops just after first step. \(\begin{array}{*{20}{c}}
  {Me} \\ 
  | \\ 
  {Me - Si - OH} \\ 
  | \\ 
  {Me} 
\end{array}\) \(+\) \(\begin{array}{*{20}{c}}
  {Me} \\ 
  | \\ 
  {HO - Si - Me} \\ 
  | \\ 
  {Me} 
\end{array}\) \(\xrightarrow[{ - {H_2}O}]{}\) \(\mathop {\begin{array}{*{20}{c}}
  {\,\,Me\,\,\,\,\,\,\,\,\,\,\,\,\,Me} \\ 
  {|\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,|} \\ 
  {Me - Si - O - Si - Me} \\ 
  {|\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,|} \\ 
  {\,\,Me\,\,\,\,\,\,\,\,\,\,\,\,\,Me} 
\end{array}}\limits_{Final\,product\,(\dim er)} \)