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In which of the following molecules the central atom does not have sp3 hybridization?

Option: 1

CH4


Option: 2

SF4


Option: 3

\text{BF}_{4}^{-}


Option: 4

\text{NH}_{4}^{+}


Answers (1)

best_answer

When the number of hybrid orbitals, is  4 the hybridization is sp3 hybridization

H=\frac{1}{2}\left [ V+M-C+A \right ]

Where,\, \, V=number \, of \, valence\,\, eletron\, \, in \, centralatom

c=total\, \, positive\, \, charge

A= negative\, \, charge

M=Number\, \, of \, \, monovalent\, \, atoms

\\ \text{For} \ CH_{4} \\ H =\frac{1}{2}[4+4-0+0] = 4 \\ sp^{3} \\ \\ \text{For} \ SF_{4} \\ H =\frac{1}{2}[6+4-0+0] = 5 \\ sp^{3}d \\

\\ \text{For} \ BF_{4}^{-} \\ H =\frac{1}{2}[3+4-0+1] = 4 \\ sp^{3} \\ \\ \text{For} \ NH_{4}^{+} \\ H =\frac{1}{2}[5+4-1+0] = 4 \\ sp^{3}

Thus, only in SF4 the central atom does not have sp3 hybridisation.

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Riya

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