The Heteronuclear Multiple-Quantum Correlation Experiment: Perspective from Classical Vectors, Nonclassical Vectors, and Product Operators

Figure 2

The pulse sequence of HMQC is presented on top. Pulses are designated by the rotation angle, in degrees, with a subscript indicating the axis. Magnetization evolution is presented in schemes below. Thick arrows represent net magnetization and thin arrows represent vector components. Red color is used for proton, while blue is used for carbon. Green dashed arrows in scheme 7 represent the projection of carbon components into the - and -axes. Further insights concerning the interpretation of schemes 7–9 shall be given in the section devoted to a comparative analysis.