November 23, 2024, 07:54:20 AM
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Topic: which phenyl protons usually have the highest chemical shift in H NMR?  (Read 3772 times)

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Offline trishasales714

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I know it can vary but I'm curious if there's a particular one (para, ortho or meta) that usually has a higher chemical shift than the rest?

Offline Dan

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It depends on electron density at each position, which varies depending on the substituents (e.g. electron-donating and -withdrawing substituents have opposite effects) - if you google chemical shifts of aromatic H (or similar) you will find lots of detailed explanations.
My research: Google Scholar and Researchgate

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