Conclusions

1. A dependence of the magnetic resonance parameters on the nature of the anion was established for organic polythiophene conductors with various anions.
   
2. The major values of the anisotropic g-tensor were measured by 2-mm band ESR spectroscopy and the conductivity of polythiophene (BF₄ – and polyacetylene (I^–) was evaluated at 200°K.