7791-27-7

Disulfuryl dichloride ClSO2OSO2Cl was characterized by vibrational spectroscopy in the gaseous and liquid phase as well as in the Ar-matrix. By varying the temperature, certain bands could be assigned to several conformers. Gas-phase electron diffraction revealed a dominance of the anti-conformer at ambient temperature. The same conformation was found in the solid state. Via the in situ technique for crystallization, not less than four different modifications were identified. Among these different modifications, the structural parameters of the molecules remain relatively constant, but the aggregation pattern changes. Although the molecules aggregate by chlorine???oxygen contacts in each modification, the geometrical parameters of these interaction show significant differences and were evaluated and are in part inconsistent with the halogen bonding concept.

The invention discloses a para-ester synthesis process capable of recycling hydrogen chloride, which is characterized by comprising the following steps: (1) preparing chlorosulfonic acid; absorbing the hydrogen chloride gas generated in the chlorosulfonation link through an original HCl absorption tower, and resolving to generate pure hydrogen chloride gas; reacting the hydrogen chloride gas withpure sulfur trioxide gas in a primary reaction tower to obtain gaseous chlorosulfonic acid; condensing the gaseous chlorosulfonic acid and entering in a secondary reaction tower, and fully reacting aside reaction product in the primary reaction tower with excessive sulfur trioxide and hydrogen chloride to further generate chlorosulfonic acid; (2) preparing para-ester; preparing chlorosulfonated substances in a sulfonation reaction kettle; diluting and carrying out suction filtration, and then carrying out a reduction reaction, a condensation reaction and an esterification reaction to preparethe para-ester. The hydrogen chloride generated in the chlorosulfonation link is recovered and reacts with sulfur trioxide gas to prepare chlorosulfonic acid, the chlorosulfonic acid serves as a raw material in the chlorosulfonation link, the para-ester is further prepared, and cyclic utilization is achieved.

Photochemically induced gas-phase reactions of CI2/SO 2/O2 mixtures at -78 °C have been investigated on a preparative scale. The sulfuryl chlorides CISO2(OSO2) nCI, n = 0,1, or 2, along wit

Iodine and a few of its compounds form low valent polyatomic cations of iodine in chlorosulphuric acid medium.Conductometric redox titrations of iodine with the solutions of oxidizing agents like K2S2O8 in HSO3Cl indicate the formation of the cations I2(+) and I(+), which however, disproportionate to I3(+) and I(SO2Cl)3.Potassium iodide, iodine monochloride, iodic acid and iodine pentoxide produce reddish-brown coloured solutions characteristic of I3(+) cation.Iodine trichloride, however ionizes to yield ICl2(+).Conductometric titration of iodine against iodine trichloride in the acidic medium indicates the formation of I2Cl(+).