Question

The given reaction can occur in the presence of :
(a) Bromine water
(b) $Br _{2}$ in $CS _{2}, 273\, K$
(c) $Br _{2} / FeBr _{3}$
(d) $Br _{2}$ in $CHCl _{3}, 273\, K$
Choose the correct answer from the options givenbelow

• A. (b) and (d) only
• B. (a) and (c) only
• C. (b), (c) and (d) only
• D. (a), (b) and (d) only

Answer 1

Answer: (C)

The main reasons are :
(i) six large chloride ions cannot be accommodated around $Si ^{4+}$ due to limitation of its size.
(ii) interaction between lone pair of chloride ion and $Si ^{4+}$ is not very strong.
The species like, $SiF _{6}{ }^{2-},\left[ GeCl _{6}\right]^{2-},\left[ Sn ( OH )_{6}\right]^{2-}$ exist where the hybridisation of the central atom is $sp ^{3} d ^{2}$.