Under hydrolytic conditions, the compounds used for preparation of linear polymer and for chain termination, respectively, are

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Under hydrolytic conditions, the compound used for the preparation of linear polymer and for chain termination are $(C H_{3})_{2} SiC l_{2}$ and $(C H_{3})_{3} SiCl$ respectively.

The hydrolysis of dimethyldichlorosilane gives dimethyl silane diol which on condensation polymerization forms a linear polymer.

The hydrolysis of trimethylchlorosilane gives trimethyl silanol which can not undergo polymerization as it contains only one -OH group so it is used for chain termination.

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