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Chemistry Forums for Students => Organic Chemistry Forum => Organic Spectroscopy => Topic started by: myabaumbach on December 15, 2021, 10:44:54 AM

Title: allyl pattern in nmr
Post by: myabaumbach on December 15, 2021, 10:44:54 AM

How does allyl protons appear in HNMR
I have doublet at 4 ppm, two doublets at 5-5.5 ppm and multiplet at 6 ppm
how can this be explained

Title: Re: allyl pattern in nmr
Post by: phth on January 02, 2022, 08:51:28 PM

What are the J coupling values? Are there multiple J coupling values per each proton?

Title: Re: allyl pattern in nmr
Post by: wildfyr on January 03, 2022, 11:20:47 AM

Yep, that is HIGHLY characteristic of allyl.

You can look up some allyl compounds on the public site SDBS for examples.

https://sdbs.db.aist.go.jp/sdbs/cgi-bin/cre_index.cgi