What is the diference between the most common two-dimensional NMR techniques: COSY and HETCOR?
In COSY, the proton spectra are plotted along each axis, while in HETCOR the proton spectrum is on one axis and the
(you may also see it written as H,H-COSY)
In COSY, both axes correspond to
The off-diagonal peaks show which protons are coupled to each other.
The COSY spectrum of ethyl but-2-enoate
For example, peak A indicates a coupling between the
This shows that the
in HETCOR spectra, a proton NMR spectrum is plotted on one axis and the
The peaks show which
Here is the HETCOR spectrum of ethyl but-2-enoate.
For example, Peak A indicates that the
This corresponds to the