Variant of the
heteronuclear single quantum correlation (HSQC) and
heteronuclear multiple bond correlation (HMBC) experiment in
nuclear magnetic resonance spectroscopy that almost exclusively correlates
\(\ce{^{1}H}\) nuclei with heteronuclei separated by two covalent bonds.
Source:
PAC, 2021, 93, 647. 'Glossary of methods and terms used in analytical spectroscopy (IUPAC Recommendations 2019)' on page 690 (https://doi.org/10.1515/pac-2019-0203)