Which one of the following compounds has - hybridisation?
1
2
3
4
Official Solution
Correct Option: (2)
In molecule, is hybridised
02
PYQ 2011
hard
chemistryID: wbjee-20
The hybridization of central atom of a molecule would lead to
1
square planar geometry
2
tetrahedral geometry
3
trigonal bipyramidal geometry
4
octahedral geometry
Official Solution
Correct Option: (4)
The and hybridization of central atom leads to octahedral geometry.
03
PYQ 2012
medium
chemistryID: wbjee-20
The state of hybridization of the central atom and the number of lone pairs over the central atom in are
1
2
3
4
Official Solution
Correct Option: (3)
bonds hybridisation without lone pair of electrons.
04
PYQ 2022
medium
chemistryID: wbjee-20
Hybridisation of the negative carbons in (1) and (2) are:
1
sp2 and sp3
2
sp3 and sp2
3
both sp2
4
both sp3
Official Solution
Correct Option: (1)
The correct answer is sp2 and sp3.
Here's why:
Hybridization and Carbanions: A carbanion is a carbon atom with a negative charge and three substituents. The hybridization depends on whether the lone pair on the carbon is involved in resonance.
Structure (1): In structure (1), the carbanion is directly attached to a carbonyl group. The negative charge can delocalize into the carbonyl group through resonance: This resonance delocalization makes the carbanion sp2 hybridized. The carbon has 3 sigma bonds and 0 lone pair. The lone pair participates in pi-bonding.
Structure (2): In structure (2), the carbanion is attached to 3 other atoms with single bonds. Therefore, it is sp3 hybridized. The carbon has 3 sigma bonds and 1 lone pair.
Therefore, the hybridization of the negatively charged carbons in (1) and (2) are sp2 and sp3, respectively.
