The electronic g factor carries highly useful information about the electronic structure of a
paramagnetic species, such as spin-orbit coupling and dia-or paramagnetic (de-) shielding
due to local fields of surrounding electron pairs. However, in many cases, a near “spin-only”
case is observed, in particular for light elements, necessitating accurate and precise
measurement of the g factors. Such measurement is typically impeded by a “chicken and
egg situation”: internal or external reference standards are used for relative comparison of …