Bond angles of PF3 and PCl3

In case of PF3 the size of F is small and thus it approaches near to the central atom that is P.

as it approaches near to P there comes the repulsion between the bond pairs,

which widens the bond angle and makes it larger than in case of PCl3.

Here two types of forces are deployed

  1. Bond pair – lone pair repulsions
  2. Bond pair –bond pair repulsions.

In case of the PF3 , the bond pair- bond pair repulsions compensate the effect of lone pair-bond pair repulsions. Thus the bond angle is larger as it has to face lesser repulsion in case of P-F-P bond angle.

Structure of PF3

In case of PCl3 , the size of Cl is larger as compared to F. so in this case the bonds are longer and bond pairs have enough space between them. and the lone pair – bond pair repulsion plays a bigger role in deciding the bond angle . So the bond angle is decreased due to the compression of bonds by repulsion of lone pair. As shown below:-

Structure of PCl3

Contribute to make this site more intractive.


Make a one-time donation

Make a monthly donation

Make a yearly donation

Choose an amount


Or enter a custom amount


Your contribution is appreciated.

Your contribution is appreciated.

Your contribution is appreciated.

DonateDonate monthlyDonate yearly

Published by Ankush Sharma

I am M.Sc (chemistry ) from Punjabi University Patiala. I am a science teacher with expertise in chemistry, with 8 years of experience in teaching. Writing and blogging is my hobby, I write whenever I am free. I am constantly working on creating a new and easy way of learning the tough things in an effective way. I am constantly working to make authentic and reliable information to be shared with my students and widen the horizons of knowledge.

Leave a Reply

Fill in your details below or click an icon to log in: Logo

You are commenting using your account. Log Out /  Change )

Facebook photo

You are commenting using your Facebook account. Log Out /  Change )

Connecting to %s

This site uses Akismet to reduce spam. Learn how your comment data is processed.

%d bloggers like this: