TeCl₄ in organic synthesis. Elimination reactions

TeCl₄ has been shown to react smoothly with unsaturated or halogenated cyclohydrocarbons. With cyclohexene, alklcyclohexenes, halogenocyclohexenes, halogenocyclohexanes or unsaturated polycyclic compounds at elevated temperatures (ca 80°C), aromatization takes place as the only process, whereas at room temperature, addition products of halogenation or halogenotelluration are also formed. With conjugated dienes only chlorine-containing products are obtained with TeCl₄, whereas dienes with separated double ponds undergo addition of TeCl₄ to the double bond. An ionic pathway for the addition and aromatization reactions is suggested.