First slide

Silicones

Question

Which one of the following is the starting material in the preparation of linear silicones ?

Easy

A

$R_{4} Si$
B

$R_{2} {SiCl}_{2}$
C

$R_{3} SiCl$
D

${RSiCl}_{3}$

Solution

$2 R - Cl + Si \to_{573 K}^{Cu} R_{2} {SiCl}_{2}; R_{2} {SiCl}_{2} \to_{- 2 HCl}^{2 H_{2} O} R_{2} Si {(OH)}_{2};$

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