Abstract
The hydrogen exchange reaction on alkali metal- and alkali earth metal-naphthacene ion salts was observed by means of para-ortho hydrogen conversion. In the case of mononegative ion salt (naphthacene) −M +, the para-ortho hydrogen conversion proceeded by the physical mechanism. On the contrary, in the case of the naphthacene dinegative ion salts with alkali metal (naphthacene) 2−2M +, the chemisorptive mechanism was predominant. Further, the hydrogen exchange over the (naphthacene) 2−Ba 2+ salt occurred by way of exchange reaction between gaseous hydrogen and the hydrogen atom of the hydrocarbon. A proposal to explain the surface reaction is submitted.
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