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Chemistry Question... PLEASE HELP? I've been working on my homework for hours & I am stuck on this one... And we don't have lectures...?
a) Determine the N--O bond order for each of the following species:
1) NO
2) NO2^1-
3) HNO2
*If I remember correctly Bond Order is something along the lines of # shared/# bonds, but I am not certain and I don't know if I did it correctly.
b) Rank ALL the NO bonds in PART A in order of increasing length.
1 Answer
- IggyLv 75 years ago
a)
1) NO has a double bond between the nitrogen and the oxygen. Bond order = 2
2) [NO2]^- can be described with a resonance structure that means a bond is shared between the two oxygen atoms. Bond order = 1.5
3) There are two bonds here. One (N=O) is a double bond, Bond order = 2, the other is to a hydroxyl group (N-O-H) and is a single bond. Bond order = 1.
b)
Rank in sequence of decreasing bond order and you'll have this in order of increasing length
[HNO2, N=O] and [NO] -based on bond order alone, I call this a tie, however I would suggest the NO bond on it's own to be slightly stronger, due to the electronegativity of the hydroxyl group oxygen in HNO2. I doubt your teachers want you to go to that depth, given the question.
[NO2]^-
[HNO2, N-O(H)]
