Cl as an expanded octet
Moderators: Chem_Mod, Chem_Admin
-
- Posts: 117
- Joined: Thu Jul 11, 2019 12:15 am
Cl as an expanded octet
How can Cl form an expanded octet? And can someone please provide an example of a compound in which Cl acts as an expanded octet?
-
- Posts: 120
- Joined: Thu Jul 25, 2019 12:17 am
Re: Cl as an expanded octet
Since Cl is in the third period it can hold electrons in its d shell (3d) and form an expanded octet. I googled it and found the example: ClF3
-
- Posts: 50
- Joined: Fri Aug 30, 2019 12:18 am
Re: Cl as an expanded octet
AngieGarcia_4F wrote:I googled it and found the example: ClF3
To add to this, one of the problems on our practice exam was to draw ClO4-, and the only correct way to do it is to know that Cl can access the 3d subshell and accept more electrons. Always check the formal charge to make sure your molecule works out ;)
-
- Posts: 130
- Joined: Wed Sep 11, 2019 12:16 am
Re: Cl as an expanded octet
Like other elements in Period 3 or higher, atoms can have an expanded octet because a d-subshell is present, although it isn't filled for Period 3. You can think of it as existing, but empty for Period 3 elements. Thus, when Period 3 elements like Cl gain more electrons, their d-orbitals are occupied.
Who is online
Users browsing this forum: No registered users and 0 guests