Abstract:
The Review discusses in what elementary chemical reactions the intrinsic angular momentum of electrons and nuclei is conserved and in what reactions it is not conserved, how weak electron- nuclear magnetic interaction and an external magnetic field influence the conservation of angular momentum and what are the consequences of this effect, and what magnetic effects occur in chemical reactions, as well as the conditions for their development and detection. Conditions are formulated for the non-conservation of the intrinsic angular momentum of electrons and nuclei in chemical reactions. The bibliography contains 36 references.