Primitive semiclassical quantization of H-2(+) and D-2(+) without the
restriction of the separation of electronic and nuclear motions. revea
ls the existence of a small (10%) classical contribution to the one-el
ectron chemical bond. It is found that in the electronic ground state
the electron is exchanged classically between the two nuclei and that
this exchange is correlated with the molecular vibration. [S1050-2947(
98)03302-2].