SYNTHESIS AND MOLECULAR-PARAMETERS OF OLI GOARYLENECARBORANES

The specific parameters of the synthesis of oligophenylene-, oligonaph thylene-, and oligcanthracenecarboranes were studied. Molecular mass a nd viscosity of each oligoarylenecarborane were determined and the wei ght average and number-average molecular mass distributions were analy zed using gel permeation chromatography. Fractional extraction was use d to isolate eight fractions of oligophenylenecarborane and it was sho wn that they were described by the Mark-Kuhn-Houwink equation with an exponent of 0.59. For the free rotation model, the Kuhn segment was ev aluated using the Monte-Carlo computational procedure.