Beiträge zur Chemie des Phosphors. 231. Li3P7S3 und Li2HP7S2 — die ersten Sulfido-heptaphosphane(3)

Contributions to the Chemistry of Phosphorus. 231. Li₃P₇S₃ and Li₂HP₇S₂ — the First Sulfido Heptaphosphanes(3) The novel sulfido heptaphosphanes(3) Li₃P₇S₃ ( 1 ) and Li₂HP₇S₂ ( 2 ) have been obtained by the reaction of Li₃P₇ with sulfur in tetrahydrofuran under suitable conditions. The compounds 1 and 2 are also formed from LiP₅ and sulfur and are only stable in solution below room temperature. According to a complete analysis of the ³¹P{¹H}-NMR spectra, in each case, the sulfur atoms are bonded as sulfido groups exocyclically to the heptaphosphanortricyclene skeleton. Compound 2 reacts with chloro(trimethyl)silane or acetylacetone at one of the two sulfido groups while compound 1 does not form any product with retention of the P₇(3) framework.