Electric Conductivity and Paramagnetic Resonance of Charge-Transfer Complexes of Chloranil with Trimethylamine and Triethylamine

The conditions for the formation of charge-transfer complexes of p-chloranil with aliphatic amines were examined. The formation of the stable CT complex was found only in the reaction of gaseous trimethylamine and triethylamine with solid choranil. Electric conductivity of the complexes in form of pressed pellets and of thin films was measured as a function of temperature and pressure of amine vapour. The doping effects of ambient amine, viz. and increase in conductivity and a decrease in activation energy were observed. The effects were due to an increase in the ionic character of the complex, revealed as a rise of the ESR-absorption and a modification of the IR spectrum.