Question

${(SiH}_3{)}_{3}N$ is a____base than ${(CH}_3{)}_{3}N$.

• A. weaker
• B. stronger
• C. equal
• D. none

Answer 1

The correct option is A weaker

Lone pair of electrons on nitrogen in ${(SiH}_3{)}_{3}N$ are used up in $p\pi -d\pi$ back bonding while in ${(CH}_3{)}_{3}N$ such a $p\pi -d\pi$ bonding is not possible due to absence of vacant d-orbitals in carbon. therefore ${(CH}_3{)}_{3}N$ is more basic than ${(SiH}_3{)}_{3}N$.