Direct Preparation of Anhydrous Sodium Oligosulfides from Metal Sodium and Elemental Sulfur in Aprotic Organic Media Directed toward Synthesis of Silane Coupling Agent

Abstract Anhydrous sodium oligosulfide was prepared by the heterogeneous reaction of metal sodium and elemental sulfur in aprotic solvents. The oligosulfide consisted of a mixture of several Na2Sn (n=2-8). Organic oligosulfides (R2Sn, n≥2) including moisture-sensitive one were synthesized by the reaction with organic halides in high yeilds under mild conditions.