heteronuclear multiple quantum coherence 1H–13C heteronuclear multiple quantum coherence CHMO:0002399 https://orcid.org/0000-0001-5985-7429 1H-13C heteronuclear multiple quantum coherence 2009-09-16T11:27:48Z 13C–1H HMQC 13C-1H HMQC FIX:0000475 1H–13C HMQC 1H-13C HMQC A type of heteronuclear NMR spectroscopy where a second frequency dimension is employed to disperse the signals and reveal correlations between protons and the 13C nuclei to which they are covalently bound. The magnetisation of both the proton and the 13C nucleus is allowed to evolve over time.