(65 % SO3) in the ionic liquid [BMIm][OTf]. The crystal structures of K[HS2O7], [NH4][HS2O7], [NO][HS2O7], and Rb[HS2O7] show the [HS2O7]– ions linked into dimers by strong hydrogen bonds. Contrastingly, in the crystal structure of Cs[HS2O7] the [HS2O7]– ions are connected to infinite chains. Raman spectra were recorded for M[HS2O7] (M = K, Rb, Cs).
KCl、[NH4]2[SO4]、Rb2[CO3] 和 CS2[CO3] 与
发烟硫酸 (65 % SO3) 的反应生成无色且对湿气敏感的 K[HS2O7] 晶体(单斜晶系,P21/c ( no. 14), Z = 4, a = 716.67(3) pm, b = 1043.57(4) pm, c = 828.78(3) pm, β = 107.884(1)°, V = 589.89(4) × 106 pm3 ), [NH4][HS2O7] (单斜, P21/c (no. 14), Z = 4, a = 729.29(1) pm, b = 1079.73(1) pm, c = 843.26(1) pm, β = 106.397(1)°, V = 637.01(1) × 106 pm3), Rb[HS2O7] (单斜, P21/c (no. 14), Z = 4, a = 724.49(2) pm