11th Class Chemistry The p-Block Elements-I

  • question_answer 46) If the starting material for the manufacture of silicones is\[RSiC{{l}_{3}}\], write the structure of the product formed.

    Answer:

    The hydrolysis of \[RSiC{{l}_{3}}\] gives a cross-linked polymer. \[Cl-\underset{\underset{\text{Cl}}{\mathop{\text{ }\!\!|\!\!\text{ }}}\,}{\overset{\overset{\text{R}}{\mathop{\text{ }\!\!|\!\!\text{ }}}\,}{\mathop{\text{Si}}}}\,-Cl+3{{H}_{2}}O\xrightarrow{-3HCl}HO-\underset{\underset{\text{OH}}{\mathop{\text{ }\!\!|\!\!\text{ }}}\,}{\overset{\overset{\text{R}}{\mathop{\text{ }\!\!|\!\!\text{ }}}\,}{\mathop{\text{Si}}}}\,-OH\] \[nHO-\underset{\underset{\text{OH}}{\mathop{\text{ }\!\!|\!\!\text{ }}}\,}{\overset{\overset{\text{R}}{\mathop{\text{ }\!\!|\!\!\text{ }}}\,}{\mathop{\text{Si}}}}\,-OH\xrightarrow[-(n-1){{H}_{2}}O]{Polymerisation}\]    


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