Cyclotriphosphazenes bearing an amino ligand are readily converted into the corresponding (tripheny1phosphoranylidene)amino derivatives by means of an excess of triphenylphosphinetetrachloromethane in an acetonitrile-triethylamine medium (Appel reaction). Thus prepared, N3P3CI4( N=PPh3)2 reacts with dimethylamine in various solvents according to a geminal substitution pattern ; this is an indication of SN1 -type reactions, as a result of the strong electron-donating character of the ligands. The ultimate substitution product N3P3( NMe2),( N=PPh3)2, also prepared from N3P3(NMe2)4(NH2)2, is isolated as its HCI or 2HCI adduct, depending on the method of preparation. In both adducts the protons are attached to ring nitrogen atoms, and variable-temperature
Reactions of the ring system cis-(NSOCl),NPCl, with water in the presence of [Me4N]C1 or [Ph,As]Cl convert it into salts containing the N,PS,O,Cl,-anion; 31P n.m.r. and X-ray structural data demonstrate that substitution takes place at the phosphorus centre.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.