Question

In which of the following species, presence of t-bond will affect ideal bond angle
(A) POCI3
(B) COCl2
(C) Xe04
(D) SF4​

Answer 1

Answer:

Bond angle of PF

3

>PCl

3

but bond angle of PCl

3

<PBr

3

Reason

The bond angles show an increase on decreasing electronegativity of attached other atom on central atom but in PF

3

pπ−dπ bonding results in an increase in bond angle.

Answer 2

COCl2- presence of t-bond will affect ideal bond angle

Explanation:

• By the presence of lone pairs of electrons at the central atom, Bond angle is affected.
• The  POCl3 molecular geometry is tetrahedral also asymmetric charge distribution round the central atom.
• As it has no lone pair of electrons, the form of XeO4 is tetrahedral and also the bond angle of 109 degrees.
• The nature of the molecule is polar and also the atoms form a trigonal bipyramidal shape. The equatorial fluorine atoms have 102° bond angles actual it's 120° angle.
• Bond length increases with decreasing bond order that the short the bond, the higher will be its bond order.