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why trimethylamine is a relatively stronger base than trisilylamine??

why trimethylamine is a relatively stronger base than trisilylamine??

Grade:

2 Answers

SAGAR SINGH - IIT DELHI
879 Points
10 years ago

Dear student,

Tri methyl amine has 3 methyl groups attached to the nitrogen. these - CH3 groups are aliphatic and hence electron donating in nature. They tend to donate electrons to nitrogen which increases the electron density at Nitrogen. Trimethylamine can hence easily donate electrons and hence is a stronger base.

 

Sri
11 Points
4 years ago
Tri methyl amine has 3 methyl groups attached to the nitrogen. these - CH3 groups are aliphatic and hence electron donating in nature. They tend to donate electrons to nitrogen which increases the electron density at Nitrogen. Trimethylamine can hence easily donate electrons and hence is a stronger base.whereas due to the presence of vacant d orbital of Si in trisiylamine it accept electron from nitrogen atom through back bonding...as the result its the basic nature decreases

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