The semiempirical dipole moment functions of the molecules HX (X = F, Cl, Br, I, O), CO and NO

A semiempirical method is suggested to construct the dipole moment function for a diatomic molecule in the form of a piecewise-continuous function that exhibits physically correct behaviour at small and large internuclear separations and agrees with the dipole moment function near the equilibrium position of molecule nuclei. The dipole moment functions are calculated for the ground electron states of the molecules HF, HCl, HBr, HI, OH, NO and CO for all ranges of internuclear separations.