Ein neues Kaliumhydrogensulfat,K(H3O)(HSO4)2 — Synthese und Struktur

A New Potassium Hydrogensulfate, K(H₃O)(HSO₄)₂ — Synthesis and Structure Single crystals of the new compound K(H₃O)(SO₄)₂ are synthesized from the system potassium sulfate/sulfuric acid. The up to day not described compound crystallizes in the monoclinic space group P2₁/c with the unit cell parameters a = 7.203(1) b = 13.585(2) and c = 8.434(1) Å, β = 105.54(1)°, V = 795.1 ų, Z = 4 and D_x = 2.107 g · cm^?3. There are two crystallographically different tetrahedral SO₃(OH) anions. The first kind S1 tetrahedra forms dimers, whereas the second kind S2 forms infinite chains bonded via hydrogen bridges. The S1 dimers are linked to the S2 chains via oxonium ions (hydrogen bonds). Potassium is coordinated by 8 oxygen atoms which belong to four different SO₃(OH) tetrahedra. These potassium oxygen polyhedra are connected by common edges forming chains running parallel z.