Is there any particular reason that peaks in proton NMR can appear with a larger integral ratio than expected, that is to say one specific proton absorption stretches over a wide ppm range?
I have a very broad singlet that is integrating to nearly 5x expected. The rest of the spectrum is fine in terms of integrating and the position of the peaks. This particular proton is a singlet from 9.95 to 10.25 ppm and is the alpha proton of a carbene hydrogen chloride salt. Either that or it is impure, but so far my spectrum is very clean whenever I run it.
Many thanks! :)