Structure, Conductivity and Raman Spectrum of 4,7,13,16-tetraoxa-1,10-dithiacyclooctadecanebis(diiodine)

摘要

The preparation, X-ray structure, Raman spectrum and conductivity of 4,7,13,16-tetraoxa-1,10-dithiacyclooctadecanebis(diiodine) (2(C12H2404S2)(dot)5I2) are described. The title compound crystallizes in space group Pi (No. 2) with a = 12.467(8), b = 14.097(7), c = 15.662(9) angstrons; Alpha = 75.53(4), Beta = 75.94(5), Gamma = 70.01(4) degrees and Z = 2; R = 0.043 for 5899 reflections. The 1, units form a neutral polyhalogen network anchored at sulfurs. The Raman spectrum at 100 K shows one peak at 164 cm(-1) assigned to the symmetric stretching mode of I2. This compound has low electrical conductivity, which is attributed to the lack of continuous polyiodide chains in the structure.