4.43 - "s-character"

Moderators: Chem_Mod, Chem_Admin

Kyra LeRoy 1E
Posts: 52
Joined: Sat Jul 22, 2017 3:00 am

4.43 - "s-character"

Postby Kyra LeRoy 1E » Sat Nov 25, 2017 8:08 pm

Can someone explain the answer to this question to me? It asks:
"Do you expect the bond angle between two hybrid orbitals to increase or decrease as the s-character of the hybrids is increased?"
The correct answer is increase.

Also, what exactly do they mean by "s-character"?


Justin Lau 1D
Posts: 51
Joined: Sat Jul 22, 2017 3:00 am

Re: 4.43 - "s-character"

Postby Justin Lau 1D » Sat Nov 25, 2017 9:51 pm

What I took it to mean was that there were less p orbitals hybridized with the s orbital, so the s orbital "retains more character" in the hybridization. Basically, I guess there's more of the fractional s orbital per hybridized orbital. The reason that the bond angles increase as there's more s character can be easily seen if you look at how many hybridized orbitals you are creating. sp is for 2 electron pairs/atoms, sp2 is for 3, sp3 is for 4, and so on. Looking at say, sp3, we know the bond angles to be 109.5 or a little less depending on the number of atoms/electron pairs. Moving to sp2, we see that it's 120 or slightly less, and sp is 180. Therefore, we can see that the bond angles increase.

Return to “Hybridization”

Who is online

Users browsing this forum: No registered users and 2 guests