https://doi.org/10.1351/goldbook.C01383
A quantitative measure for nuclear spin-spin, nuclear-electron (@[email protected]) and electron-electron (fine @[email protected] in EPR) @[email protected] in magnetic @[email protected] @[email protected] The 'indirect' or scalar NMR @[email protected] constants are in a first approximation independent of the external magnetic field and are expressed in \(\mathrm{Hz}\).