[ngray]

What is the common CDCl3 peak/signal for 19F NMR?

[azmanam]

There's no F in CDCl3 - no 19F signal.

[nielsgeode]

There's no F in CDCl3 - no 19F signal.

exactly 

for 1H it's @ 7.24
for 13C it's @ 78.00 (the central peak)
for 35Cl / 37Cl ==> cannot really be measured by NMR. I tried it once on a Varian 500MHz but it just gives crap

[sjb]

There's no F in CDCl₃ - no 19F signal.

exactly 

for ¹H it's @ 7.24
for ¹³C it's @ 78.00 (the central peak)
for ³⁵Cl / ³⁷Cl ==> cannot really be measured by NMR. I tried it once on a Varian 500MHz but it just gives crap

Have you got a reference for that? I've always used 7.27 and 77.1  (for proton and carbon respectively). I do know that it's all relative though - so as long it's clear what you reference to, it's all much of a muchness in the end.

S

[muse]

Hi

This article is very usefull for shift references and impurities in NMR samples.
http://ccc.chem.pitt.edu/wipf/Web/4505.pdf

-m

[macman104]

It also depends how accurately your shift reference is set to 0 (if you're using TMS).