Synthesis and Characterisation of New Arsonium Salts and Crystal Structures of Trimethylarsonium Undecafluorodiarsenate (CH_3)_3AsH~+ As_2F_(11)-and Trimethylarsonium Hexafluoroantimonate (CH_3)_3AsH~+SbF_6-

摘要

The reaction of trimethylarsane in the superacidic systems hydrogen/fluoride antimony pentafluoride and hydrogen fluoride/arsenic pentafluoride leads to trimethylarsonium fluorometallates.These salts are stable up to 60deg C and 5deg C,cases of trimethylarsonium undecafluorodiarsenate and trimethylarsonium hexafluoroantimonate. (CH_3)_3AsH~+- As_2F_(11)-crystallizes in the monoclinic space group P2_1 with four formula units per unit cell with the dimensions a=7.362(1),b=12.589(1),c=13.589(1) A and #beta#=95.37(1)deg.(CH_3)_3AsH~+SbF_6- crystallizes in the monoclinic space group P2_1/m with four formula units per unit cell with the dimensions a=8.313(1),b=8.855(1),c=13.285(1) A and #beta#=94.358(1)deg.