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Question

What is the correct geometry for carbocation?

A
Trigonal planar
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B
Tetrahedral
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C
Linear
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D
Pyramidal
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Solution

The correct option is A Trigonal planar
Carbocation forms from heterolytic bond cleavage. CH+3 is sp2 hybridized. It is the mixture of one s-orbital and two p-orbitals. Thus, the geometry of carbocation is trigonal planar as it has 3 sigma bonds. All the H and C lie in one plane.
Carbocation ion has electron-deficient nature as there is a vacant p orbital which shows its nature. In valence, shell carbon has 6 electrons. Thus, it is an electron-deficient species.

The structure of carbonium ion is given below:


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