Question

What does cross peak X in figure tell you?

Short answer

Hydrogen having signal at in ${}^1\mathrm{H}$NMR spectrum has a bond with the carbon atom having signal at $19\mathrm{ppm}$ in ${}^{13}C$NMR spectrum.

Step-by-step solution

Step-by-Step SolutionStep 1: Identifying the type of spectrum

The given spectrum is an example of the HETCOR spectrum.

HETCOR spectrum tells about the bonding between carbon and hydrogen atoms.

Explanation of cross peak

Cross peak in the HETCOR spectrum hints at how the carbon atom and hydrogen atom get bonded. Here, protons having signal at $1\mathrm{ppm}$in ${}^1\mathrm{H}$NMR spectrum make a bond with the carbon atom having signal at$19\mathrm{ppm}$ in role="math" localid="1652278604840" ${}^{13}\mathrm{C}$NMR spectrum.