The HSQC (Heteronuclear Single Quantum Coherence) experiment is used to determine
proton-carbon single bond correlations, where the protons lie along the observed
F2 (X) axis and the carbons are along the F1 (Y) axis.
An edited HSQC spectrum of sucrose at 500 MHz is shown below. The edited version
shows CH2 peaks in blue and CH (and CH3-although there are none in sucrose) peaks
in red in opposite phase. Edited HSQC provides the same information
as the DEPT135 experiment but HSQC is much more sensitive.