Conductivity, FT-Raman spectra, and X-ray crystal structures of two novel (D2I)In (n = 3 and D = N-methylbenzothiazole-2(3H)-selone; n = 7 and D = N-methylbenzothiazole-2(3H)-thione) iodonium salts: first example of I-.3I2 heptaiodide

Mixtures of N-methylbenzothiazole-2(3H)-selone containing molecular diiodine in CH2Cl produce solids of stoichiometry (C8H7I4NS2) and (C8H7I2NSSe) and show feeble reactions between the I7- anions and the cations found in the chain. The triclicnic crystals of (C8H7I2NSSe) show N-benzothiazole-2(3H)-selone iodide cations and triiodide anions in various crystallographic centers. Electric conductivity is low for both compounds.