A new expression for the calculation of the solute dipole moment in the concentration range 1 % ? 40 % at microwave frequencies

A new method for the calculation of the solute dipole moment in the concentration range 1 % - 40 % at microwave frequencies is proposed. It is applied for the analysis of the dielectric data of chloral (CCl₃-CHO) in solution in benzene at 9.8 GHz. The concentration dependence of the permittivity is fitted by the equation including linear and quadratic terms of the concentration. The dipole moment of chloral obtained by this method is 7.07×10^-3 SI units, a value 36 % higher than the one computed by the Guggenheim static method.