piperidine and pyridine reacting with vanadyl acetylacetonate IR spectrum

Watch this thread
Electrogeek
Badges: 8
Rep:
? You'll earn badges for being active around the site. Rep gems come when your posts are rated by other community members.
#1
Report Thread starter 4 years ago
#1
Hi everyone,

I've taken IR spectrums of VO(acac)2, and the appropriate adducts which form when you react VO(acac)2 with pyridine and piperidine, and I've noticed that the V=O frequency has shifted.

I understand that the nitrogen atom in both pyridine and piperidine donate electron density to the vanadium central ion, which in turn weakens the V=O bond, causing the appropriate peak to shift.

I don't understand why piperidine causes a larger shift to the V=O peak than pyridine?

Is it linked with the hybridisation that occurs in the two bases - piperidine features sp3 hybridisation making it more basic than pyridine?
0
reply
X

Quick Reply

Attached files
Write a reply...
Reply
new posts
Back
to top
Latest
My Feed

See more of what you like on
The Student Room

You can personalise what you see on TSR. Tell us a little about yourself to get started.

Personalise

Has advance information helped during your exams?

Yes (108)
68.35%
No (33)
20.89%
I didn't use it to prepare (17)
10.76%

Watched Threads

View All