Re: summary of responses re NMR standard tests

GLENN H. PENNER (penner@chembio.uoguelph.ca)
Wed, 23 Apr 1997 19:26:39 EDT

> Date: Wed, 23 Apr 1997 11:31:01 -0700 (PDT)
> From: lew cary <lcary@chem.unr.edu>
> To: jsimpson@mit.edu
> Cc: ammrl@bloch.cchem.berkeley.edu
> Subject: Re: summary of responses re NMR standard tests

> Degassing 0.1% ethylbenzene is not a good thing to do, so I would caution
> when degassing. It is necessary for res. but not s/n and will cause long
> wait times for no good reason. Cheers, Lew

I do not quite understand this comment. It sounds as if it is
dangerous to degas a 0.1% ethylbenzene sol'n.
>
I think that the splitting of the CHCl3 peak is not due to
alignment in the field but rather a Cl35/Cl37 isotope shift
which of course increases with field. This was first reported
by F. Anet et al. at 500MHz and T. Schaefer and R. Sebastian
at 300MHz about 10 years ago.
>
Glenn Penner