Is it possible solid state proton nmr with negative values?

14 July 2020 1 6K Report

I have done solid-state proton NMR. General solid-state proton NMR shows broad peaks. But, I find a negative value peak. In the case of solid-state, there should not use any reference (as TMS).

What is the possible reason for it?

Sridhar Banerjee

That can happen if the proton is directly attached to a metal center.

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