AMMRL: 31P-1H Asymmetric Coupling

From: Matthew Reid <karate562000_at_yahoo.co.uk>
Date: Tue, 01 Jun 2021 10:28:12 +0100

Hello All,

I'm wondering if any of you could shed light on an asymmetric coupling
between 1H and 31P (1J) in phosphorus acid. The stack plot attached shows
the proton coupled and decoupled spectra and you can observe the asymmetry
in the coupled spectra.
The species in question is phosphorus acid in polyaminated polyisobutylene
where the phosphorus like forms a complex with the polyamine which in turn
has PIB groups attached at either end.

Any ideas would be appreciated.

Thanks

Matthew Reid
Afton Chemical

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Received on Mon May 31 2021 - 23:28:02 MST