Shape of (SiH_3)_3N and (SiH_3)_3P respective | vedclass

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(B) In $(SiH_3)_3N$,the lone pair on $N$ is involved in $p\pi-d\pi$ back-bonding with the empty $d$-orbitals of $Si$. This makes the $N$ atom $sp^2$ h

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Trigonal planar,Tetrahedral

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(B) In $(SiH_3)_3N$,the lone pair on $N$ is involved in $p\pi-d\pi$ back-bonding with the empty $d$-orbitals of $Si$. This makes the $N$ atom $sp^2$ hybridized,resulting in a trigonal planar geometry.In $(SiH_3)_3P$,the $P$ atom has a lone pair,but the energy gap between the $P$ $3p$ orbital and $Si$ $3d$ orbital is large,making $p\pi-d\pi$ back-bonding ineffective. Thus,$P$ remains $sp^3$ hybridized with a lone pair,resulting in a pyramidal (tetrahedral arrangement of electron pairs) geometry.

Shape of $(SiH_3)_3N$ and $(SiH_3)_3P$ respectively are

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