(1) Back bonding is a type of weaker π bond which is formed by sideways overlapping of filled orbital with empty orbital present on adjacent bonded atoms in a molecule.
(2) It is also considered as intermolecular Lewis acid-base interaction as it is a π bond.
(3) Back bonding is found to be effective and considerable in following type of overlapping.
[(i) 2p-2p, (ii) 2p-3p, (iii) 2p-3d]
(4) The extent of overlapping order is
[2p-2p> 2p-3d >2p-3p]
(4) dx2-y2 and dx2 Orbital’s does not participate in back Bonding.
ILLUSTRATIVE EXAMPLE: Which of the following options is/are true about back Bonding?
(A) Sigma-dative bond
(B) π- dative bond
(C) Intermolecular Lewis acid-base interaction
(D) Intramolecular Lewis acid-base interaction
SOLUTION: Options B and D are responsible for back Bonding and options A and C are responsible for Coordinate Bonding.
Realated Questions:
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