The structural formula of a compound is CH3−CH=C=CH2. The type of hybridization at the four carbon atoms from left to right is:
A
sp2,sp,sp2,sp3
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B
sp2,sp3,sp2,sp
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C
sp3,sp2,sp,sp2
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D
sp3,sp2,sp2,sp2
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Solution
The correct option is Dsp3,sp2,sp,sp2 The first carbon is bonded to second C and three H atoms all by single bonds. It has tetrahedral geometry and thus, has sp3 hybridisation.
The second and fourth C are bonded by two single bonds and one double bond and thus, have trigonal planar geometry resulting in sp2 hybridisation.
The third C is constraint to move in any direction due to double bonds on either side and hence, has a linear geometry. Thus, third C is sp hybridised.