J-coupling constants

J-coupling constants are measurements in nuclear magnetic resonance (NMR) spectroscopy that quantify the interaction between nuclear spins of atoms within a molecule. They reflect how nearby atoms influence each other's magnetic environment through chemical bonds, providing information about the spatial arrangement and connectivity of atoms. These constants are expressed in hertz (Hz) and help chemists determine molecular structure, stereochemistry, and conformations by analyzing the splitting patterns in NMR spectra, revealing how atomic nuclei communicate through bonds in complex molecules.