1.The sequence of changes in the electron-donor properties of the following groups in p-nitroanilines and their PhHg derivatives was established from the positions of the long-wave bands in the electron spectra and the ?asNO2 frequencies and integral intensities of the ?Ar and ?sNO2 bands in the IR spectra:2.The electron-donor properties of the XHgPh groups in phenylmercury derivatives of p-nitrothiophenol, p-nitrophenol, and p-nitroaniline change in the following order: SHgPh < OHgPh