Question

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

NEET 2013

• A. $M{e}_{3}SiCl$
• B. $PbSiC{l}_3$
• C. $MeSiC{l}_3$
• D. $M{e}_{2}SiC{l}_2$

Answer 1

The correct option is A $M{e}_{3}SiCl$

$PbSiC{l}_3,MeSiC{l}_3,M{e}_{2}SiC{l}_2$are monomers for a high molecular mass silicone polymer.
Silicones are organo-silicon polymer containing linkage.
Since $M{e}_{3}SiCl$ contain only one $Cl$ therefore it can't form high molecular mass silicon polymer. At best, it can form a dimer.It act a chain terminating organo-silane