Go Back   Chemistry Help Forum > Chemistry Forums > Undergraduate Chemistry Forum

Undergraduate Chemistry Forum Ask your undergraduate chemistry questions here.

Thread Tools Display Modes
Old Nov 12th 2011, 08:38 PM   #1
Junior Member
Join Date: Nov 2011
Posts: 6
Skyrim is on a distinguished road
Hybrdization of atoms that do not follow octet rule

So far I am clear on how hybridization works for "most" atoms. But some atoms do not obey the octet rule...

Some atoms have more than an octet of electrons, in which case it's either spppd or spppdd hybridization. That I understand.

Some atoms though have fewer than an octet of electrons. Boron in boron trifluoride for example (BF3). The boron only has 3 valence electrons, and bonded with each flourine there are 6 total electrons available to boron rather than 8.

So what will Boron's hybridization be in this case? I'm guessing sp2 with an unfillled unhybridized p-orbital? This is in agreement with the fact that BF3 has a trigonal planar molecular geometry (and no nonbonding electron pairs).

And also, what about atoms that have an odd number of valence electrons? Nitrogen monoxide for example? The nitrogen atom has 7 total electrons available, of which 4 are shared with oxygen via a double bond. Out of the remaining 3 electrons, two are involved in a nonbonding electron pair. But there is one final electron. Will that electron occupy a hybridized or an unhybridized orbital??

Skyrim is offline   Reply With Quote
Old Nov 13th 2011, 06:12 AM   #2
Senior Member
Unknown008's Avatar
Join Date: May 2010
Location: Mauritius
Posts: 1,685
Unknown008 will become famous soon enough
1. Right.

2. It'll be an SP2 hybridisation with the lone pair in the hybridised orbital. Though NO tends also to get the lone electron (delocalisation) in the bond, which then is an SP hybridised structure.
Jerry (Working, studying, writing and drawing :3)
It is easier to protect your feet with slippers than to cover the earth with carpet.
No one can go back and change a bad beginning; but anyone can start now and create a successful ending.

If a problem can be solved, no need to worry about it. If it cannot be solved what is the use of worrying?
Give a man a fish and you feed him for a day. Teach a man to fish and you feed him for a lifetime.
Thank you for leaving a reputation to my post

Unknown008 is offline   Reply With Quote

  Chemistry Help Forum > Chemistry Forums > Undergraduate Chemistry Forum

Thread Tools
Display Modes

Facebook Twitter Google+ RSS Feed