Whitephosphorus (P4) is still the major commercial P-atom source for the production of organophosphorus compounds. Conventionally, C–S–P bonds were constructed from environmentally questionable P(O)X directly or indirectly. From the green chemistry point of view, formation of C–S–P bonds from inorganic molecule P4 in an easy-to-operate and atom-economical way is essential because it will avoid the
A flame retardant polyolefin resin composition which, when molded, affords a molded product having highly flame retardant properties, no dripping properties, a smooth surface and an excellent appearance and superior resistances to heavy metal deterioration, heat deterioration and weather is provided, which composition consists of (A) 5 - 60% by weight of a halogen-containing flame retardant, (B) 100 - 10% by weight of antimony trioxide based on the weight of the halogen-containing flame retardant, (C) 0.5 - 15% by weight of a crosslinking agent, (D) 0.05 - 5% by weight of a specified thiophosphite, and (E) the balance % by weight of a polyolefin raein, the total of the quantities of (A), (B), (C), (D) and (E) being 100% by weight. If necessary, a processing aid may be further added to the above flame retardant polyolefin resin composition.
Industrially important triaryl phosphites, traditionally prepared from PCl3, have been synthesized by a diphenyl diselenide-catalyzed one-step procedure involving white phosphorus and phenols, which provides a halogen- and transition metal-free way to these compounds. Subsequent oxidation of triaryl phosphites produces triaryl phosphates and triaryl thiophosphates. Phosphorotrithioates are also prepared