Two-dimensional nuclear magnetic resonance homonuclear correlation experiment, which creates correlations between all protons within a given
spin system, not just between geminal or vicinal protons as in
COSY.
Note:
TOCSY uses a spin lock to allow propagation of magnetization through scalar couplings.
Source:
PAC, 2021, 93, 647. 'Glossary of methods and terms used in analytical spectroscopy (IUPAC Recommendations 2019)' on page 709 (https://doi.org/10.1515/pac-2019-0203)