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Topic: What is the bond order?  (Read 4896 times)

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Offline stacker

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What is the bond order?
« on: December 15, 2009, 05:47:44 PM »
1. The problem statement, all variables and given/known data

What is the bond order of B22-

2. Relevant equations

(Number of bonding electrons - number of antibonding electron)/2

3. The attempt at a solution

(3-0)/2 = 1.5, which is wrong. What's going on?

Offline stacker

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Re: What is the bond order?
« Reply #1 on: December 15, 2009, 06:23:24 PM »
*Ignore me, I am impatient*

Offline cth

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Re: What is the bond order?
« Reply #2 on: December 15, 2009, 06:30:18 PM »
1. The problem statement, all variables and given/known data

What is the bond order of B22-

2. Relevant equations

(Number of bonding electrons - number of antibonding electron)/2

3. The attempt at a solution

(3-0)/2 = 1.5, which is wrong. What's going on?
Where is this 3 coming from? If you add up bonding and antibonding electrons, do you have 3 electrons only overall?

Offline stacker

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Re: What is the bond order?
« Reply #3 on: December 15, 2009, 06:38:39 PM »
1. The problem statement, all variables and given/known data

What is the bond order of B22-

2. Relevant equations

(Number of bonding electrons - number of antibonding electron)/2

3. The attempt at a solution

(3-0)/2 = 1.5, which is wrong. What's going on?
Where is this 3 coming from? If you add up bonding and antibonding electrons, do you have 3 electrons only overall?

I'm not understanding what the number of bonding electrons and antibonding electrons are. What do each mean in an atom?

Offline stacker

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Re: What is the bond order?
« Reply #4 on: December 15, 2009, 06:42:43 PM »
1. The problem statement, all variables and given/known data

What is the bond order of B22-

2. Relevant equations

(Number of bonding electrons - number of antibonding electron)/2

3. The attempt at a solution

(3-0)/2 = 1.5, which is wrong. What's going on?
Where is this 3 coming from? If you add up bonding and antibonding electrons, do you have 3 electrons only overall?

I'm not understanding what the number of bonding electrons and antibonding electrons are. What do each mean in an atom?

I used three because I thought there were three single bonds protruding out of both boron atoms. If it's not three then what is it and how did you derive that?

Should it be (6-2)/2

Offline cth

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Re: What is the bond order?
« Reply #5 on: December 15, 2009, 07:09:15 PM »
Look at this webpage http://www.meta-synthesis.com/webbook/39_diatomics/diatomics.html. Half-way through, you'll find the molecular orbital diagram of diboron B2. Do you understand it?
This diagram is for B2. You now need to fill in the correct number of electrons for B22- --> it will give you the number of bonding and antibonding electrons.

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