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Which is more basic N(CH3)3 or N(SiH3)3 , explain?

Nitrogen (N) atom in trimethylamine [N(CH3)3] is sp3 hybridised and non bonding electron pair of N is localised. Therefore it is more basic. On the other hand N atom of trisilylamine [N(SiH3)3] is sp2 hybridised. This is due to the participatlon of non-bondlng pair of N into pπ-dπ back banding. Due to this delocalization of non-bonding electron pair of N in trisilylamine it is less basic.

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