1. In the first order approximation of a perturbation theory was modelled EPR-spectrums of termically polarized spins for bi and triradicaals of complexes of metals and radical pairs. There is shown the correspondence of datas of  experimentally obtained spectrums.

    2. There is shown, that the ration of intensities of high and lowfield components of EPR-spectrums of polycrystallic is model at lead-over linewidths at half-height 10-70Gs and values (d/2) /D 0.07-0.16 is well featured by the law of Boltzmann.

    3. The character of association of modelled EPR-spectrums from a breadth and shape of an individual line is investigated. It is established, that at values (d/2) /D 0.07-0.16 spectrums are most correspond to experimental.

    4. The character of association defined of modelled EPR-spectrums of constants decomposition in a zero field from a breadth of an individual line is investigated. The deviation of these constants from "exact" values is defined, that can serve for an estimation of experimental errors in definition of values of these constants.

    5. On a basisof modelled EPR-spectrums of bi and triradicaal complexes the calculations of relative densities of monoradical admixtures are carried out.