C. Muller et P. Bottcher, SYNTHESIS AND CRYSTAL-STRUCTURE OF BIS(DI ISOBUTYLAMMONIUM)-HEPTASULFIDE [H2N(I-C4H9)(2)](2)S-7, Zeitschrift fur Naturforschung. B, A journal of chemical sciences, 48(12), 1993, pp. 1732-1736
The reaction of diisobutylamine, H2S, and sulfur in a mixture of dimet
hylformamide, formamide, and ethanol yields orange crystals of bis(dii
sobutylammonium)-heptasulfide. The compound crystallizes in the centro
symmetric orthorhombic space group Pbca, the lattice constants are a =
11.234(4), b = 17.875(7), c = 27.009(10)Angstrom. The S-7(2-)-chain d
oes not have the common helical all-trans-conformation, but a mixed co
nformation trans-cis-trans (sequence of the signs of torsion angles +-- and --++).