Soci6t6 suisse de chimie, BBle -SocietA svizzera di chimica, Basilea Nachdruck verboten -Tous droits rCserv6s -Printed by Birkhauser AG., Basel, Switzerland Erscheint 9mal jahrlich -ParaTt 9 fois par an 48. Organische Phosphorverbindungen XXXI. Ein einfaches Verfahren zur Herstellung von Alkylen-bzw. Arylen-diphosphiniten und von Bis-(dialkyl-und Summary. The reactions of dialkylamino-dialkyl-or diaryl-phosphines, R,PNR; (R = C,H, , C,H,, C,H,; R' = CH,, C,H,) with unsaturated alcohols, functional alcohols, cc, w-alkane-diols and a,o-alkane-dithiols have been studied. The preparation of a large number of alkylene (or arylene) bis-phosphinites and of bis-phosphinyl-alkanes is reported and their physical properties listcd.