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Red phosphorus, soluble phosphorus organic compounds and small amounts of phosphine are formed when white phosphorus in cyclohexane solution is exposed to γ-rays. The red phosphorus contains one C 6 H 11 -group per 4 — 5 P-atoms. It reacts with chlorine to give cyclohexylphosphorusdichloride. Its reactivity towards oxygen can be decreased by high temperatures during irradiation or by high γ-doses. It is concluded from quantitative studies of this “annealing” process that phosphorus atoms carrying C 6 H 11 -endgroups are especially reactive in the polymeric form of phosphorus. The low molecular weight products of the reaction between white phosphorus and cyclohexane undergo typical reactions of tertiary phosphines. They can readily be oxidized and chlorinated to yield cyclohexyl-phosphinic-acid or cyclohexyl-phosphorus-dichloride, respectively. White phosphorus acts as a scavenger for free H-atoms and C 6 H 11 -radicals from the radiolysis of cyclohexane. This reaction, however, does generally not lead to the complete cracking of all PP-bonds of the P 4 -molecule.

γ-strahlenchemische Reaktionen des weißen Phosphors in Cyclohexan- und Cyclohexan-Tetrachlorkohlenstoff-Lösung