Abstract The reaction of (CH 3) 2 NPCl 2,[(CH 3) 2 N] 2 PCl, Et 2 NPCl 2 and C 6 H 5 (CH 3) NPCl 2 with organoaluminum compounds,(CH 3) 3 Al, Et 3 A1, Et 2 AlCl, EtAlC1 2 and iso- Bu 3 Al, has been studied. The preparation of dialkylamino-dialkylphosphines, R 2 PNK′ R ″(R [DOUBLE BOND] CH 3, Et, i-Bu; R′ R ″[DOUBLE BOND] CH 3, Et; R′[DOUBLE BOND] CH 3; R ″[DOUBLE BOND] C 6 H 5), and bis-dialkylamino-alkyl-phosphines, RP ( ...