| The NMR
scale (d, ppm) |
| Bo >> Bloc -- MHz compared to Hz |
| Comparing small changes in
the context of a large number is cumbersome |
|
|
| Instead
use a relative scale, and refer all signals (w)
in the spectrum to the |
|
| signal of
a particular compound (wref). |
|
| IMPORTANT:
absolute frequency is field dependent (n = g Bo / 2p) |
| Tetramethyl
silane (TMS) is a common reference chemical |
