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Abstract

The present invention relates to mixtures comprising from 70 to 99.5% by weight of a compound of the formula (R).sub.4 P.sup.+ X.sup.- (1) and from 30 to 0.5% by weight of a compound of the formula (R).sub.3 P.dbd.O (2), where R is in each case a radical ##STR1## and X.sup.- is an inorganic or organic anion or the equivalent of a multiply charged inorganic or organic anion, also to a process for preparing the mixtures by reacting a phosphorus pentahalide with pyrrolidine or piperidine in the molar ratio 1:6 to 1:50 in the presence of an inert solvent initially at -20 to 80.degree. C., subsequently continuing the reaction at 90 to 180.degree. C., treating the resulting reaction product at 0 to 80.degree. C. with aqueous alkali at a pH of 7 to 15, and separating aqueous and organic phase from one another, and to the use of the mixtures as catalyst and cocatalyst for phase-transfer reactions, nucleophilic substitution reactions or halogen-fluorine exchange reactions.

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First Claim