The Quantum Theory of Chemical Valence

Abstract

DR. J. C. SLATER has shown in a most valuable paper (Phys. Rev., Vol. 34, p. 1293; 1929) that one can develop the complete theory of atomic states (multiplets) in a simple way without the application of the methods of the group theory. This is of considerable importance; for the difficulties of these methods interfere greatly with the understanding of the simple relationships which are derived. I should like to point out (no doubt Slater has already done so himself) that one can treat the theory of the interaction of several atoms in the same simple way and indeed more exactly than merely to the first approximation. One obtains the results first obtained by Heitler and London with help of the methods of the group theory and, furthermore, the valence forces between atoms in all various excited states. In the interest of the further propagation of Slater's ideas, I shall in the near future publish these considerations in greater detail in the Zeitschrift für Physik.