12005-86-6Relevant articles and documents
The First Step of the Oxidation of Elemental Sulfur: Crystal Structure of the Homopolyatomic Sulfur Radical Cation [S8].+
Derendorf, Janis,Jenne, Carsten,Ke?ler, Mathias
, p. 8281 - 8284 (2017)
The oxidation of elemental sulfur in superacidic solutions and melts is one of the oldest topics in inorganic main group chemistry. Thus far, only three homopolyatomic sulfur cations ([S4]2+, [S8]2+, and [S19]2+) have been characterized crystallographically although ESR investigations have given evidence for the presence of at least two additional homopolyatomic sulfur radical cations in solution. Herein, the crystal structure of the hitherto unknown homopolyatomic sulfur radical cation [S8].+ is presented. The radical cation [S8].+ represents the first step of the oxidation of the S8 molecule present in elemental sulfur. It has a structure similar to the known structure of [S8]2+, but the transannular sulfur???sulfur contact is significantly elongated. Quantum-chemical calculations help in understanding its structure and support its presence in solution as a stable compound. The existence of [S8].+ is also in accord with previous ESR investigations.
Preparation of S7X+MF6- (X = F, Cl; M = As, Sb) and vibrational spectra of the series S7X+ (X = F, Cl, Br, I) 1
Minkwitz, Rolf,Nowicki, Joachim
, p. 2361 - 2364 (2008/10/08)
The salts S7F+MF6- and S7Cl+MF6- (M = As, Sb) have been prepared by reaction of S82+(MF6-)2 with NaF and KCl in liquid SO2. In comparison to those of the known compounds S7Br+MF6- and S7I+MF6-, their thermal stabilities are much smaller. The new products have been characterized by analytical and spectroscopic methods. IR and Ra spectra of the complete series S7X+MF6- (X = F, Cl, Br, I; M = As, Sb) have been recorded and the SX and SS stretching vibrations can be assigned: ν(SF) = 804, ν(SCl) = 528, ν(SBr) = 416, ν(SI) = 353 cm-1; ν(SS) for the ring system are found in the range 570-330 cm-1.
