Kristallstruktur von 1,1'-Dimethyl-4,4'-bipyridinium-octachlorodiantimonat(III) / Crystal Structure of 1,1'-Dimethyl-4,4'-bipyridinium-octachlorodiantimonate(III)

Abstract

Crystal Structure, 1,1 '-Dimethyl-4,4'-bipyridinium-octachlorodiantimonate(III)The title compound was prepared by reaction of SbCl3 with 1,1'-dimethyl-4,4'-bipyridiniumchloride in methanol. The single crystal structure gave the following data: [Cl2Hi4N2] [Sb2Cl8] (1) space group PI, Nr. 1, with a = 570.68(7) pm, b = 938.57(14) pm, c = 1174.27(11)"pm, q = 66.72(9)°, ß = 89.304(12)°, 7 = 78.684(11)°, and Z = 1. The compound has a small SHG effect and a phase transition at 272 °C with an enthalpy of transition of 6.54 kJ mol-1 .

Reactions of Thianthrene and 10-Phenylphenothiazine with the Lewis Acids─Titanium Tetrachloride, Titanium Tetrabromide, Tin(IV) Tetrachloride, or Antimony(V) Pentachloride: The Competition between Coordination and Oxidation

“…There are three components in the crystal: the almost planar thianthrene cation radical, the dianion (Sb 2 (μ-Cl) 2 Cl 6 ) has been seen and crystallographically characterized previously, for example, in 1,1′-dimethyl-4,4′-bipyridinium-octachlorodiantimonate-(III). 36,37 As shown in Figure 4B, the thianthrene cation radical in (3) is slightly folded about the S−S vector with a fold angle of 12°. Additionally, two of these cation radicals closely approach one another through short contacts between the sulfur atoms of 2.978 Å.…”