From Wikipedia, the free encyclopedia
Jump to: navigation, search
Kekulé, skeletal formula of dithiete with all explicit hydrogens added
3D model (Jmol)
Molar mass 90.16 g·mol−1
Related compounds
Related thietes
Related compounds
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
Infobox references

Dithiete is an unsaturated heterocyclic compound that contains two adjacent sulfur atoms and two sp2-hybridized carbon centers. Derivatives are known collectively as dithietes or 1,2-dithietes. With 6 π electrons, 1,2-dithietes, like thiophenes, are examples of aromatic organosulfur compounds. A few 1,2-dithietes are known.[1][2][3] Unsubstituted 1,2-dithiete has been generated in thermolytic reactions and was characterized by microwave spectroscopy, ultraviolet photoelectron spectroscopy and infrared spectroscopy in a low temperature matrix. The open ring structure, dithioglyoxal, HC(S)C(S)H, which is less stable than the isomeric 1,2-dithiete,[4][5] can be prepared (as trans-dithioglyoxal) by low temperature photolysis of 1,3-dithiol-2-one in solid argon or nitrogen matrix.[6] Quantum chemical calculations can reproduce the observed higher stability of 1,2-dithiete only if large basis-sets with polarization functions are used.[7][8][9][10]

General chemical structure of 1,2-dithietes, where R is an organic group


  1. ^ Drabowicz, J; Lewkowski, J; Kudelska, W; Zając, A (2008). "Four-membered Rings with Two Sulfur Atoms". Comprehensive Heterocyclic Chemistry III. 2.18: 811–852. doi:10.1016/B978-008044992-0.00218-2. 
  2. ^ Zoller, U (1996). "Four-membered Rings with Two Sulfur Atoms". Comprehensive Heterocyclic Chemistry II. 1.35: 1113–1138. doi:10.1016/B978-008096518-5.00035-6. 
  3. ^ Donahue, JP; Holm, RH (1998). "3,4-Bis(1-adamantyl)-1,2-dithiete: the First Structurally Characterized Dithiete Unsupported by a Ring or Benzenoid Frame". Acta Crystallographica. C54 (8): 1175–1178. doi:10.1107/S0108270198002935. 
  4. ^ Reinhard Schulz; Armin Schweig; Klaus Hartke; Joachim Koester (1983). "Theory and application of photoelectron spectroscopy. 100. Variable-temperature photoelectron spectral study of 1,3-dithiol-2-one and 4,5-disubstituted 1,3-dithiol-2-ones. Thermal generation of 1,2-dithiete, 3,4-disubstituted 1,2-dithietes, and dialkyl tetrathiooxalates". Journal of the American Chemical Society. 105 (14): 4519–4528. doi:10.1021/ja00352a004. 
  5. ^ Diehl, F.; Meyer, H.; Schweig, A.; Hess, B. A.; Fabian, J. (September 1989). "1,2-Dithiete is more stable than 1,2-dithioglyoxal as evidenced by a combined experimental and theoretical IR spectroscopic approach". J. Amer. Chem. Soc. 111 (19): 7651–7653. doi:10.1021/ja00201a076. Retrieved 2009-11-10. 
  6. ^ Mucha, M; Pagacza, M; Mielke, Z (6 June 2008). "Infrared detection of dithioglyoxal from photolysis of 1,3-dithiol-2-one in solid argon and nitrogen". Chemical Physics Letters. 458 (1–3): 39–43. Bibcode:2008CPL...458...39M. doi:10.1016/j.cplett.2008.04.088. 
  7. ^ Frolov, YV; Vashchenko, AV; Mal’kina, AG; Trofimov, BA (2009). "Ab initio quantum-chemical calculations of the energies and structures of 1,2-acetylenedithiol isomers". Journal of Structural Chemistry. 50 (2): 195–200. doi:10.1007/s10947-009-0029-8. 
  8. ^ Vijay, D; Priyakumar, UD; Sastry, GN (2004). "Basis set and method dependence of the relative energies of C2S2H2 isomers". Chemical Physics Letters. 383 (1-2): 192–197. Bibcode:2004CPL...383..192V. doi:10.1016/j.cplett.2003.11.021. 
  9. ^ Jonas, V; Frenking, G (1991). "On the crucial importance of polarization functions for the calculation of molecules with third-row elements: the conformations of chlorocarbonyl isocyanate ClC(O)NCO and the equilibrium of 1,2-dithioglyoxal with its cyclic isomer 1,2-dithiete". Chemical Physics Letters. 177 (2): 175–183. Bibcode:1991CPL...177..175J. doi:10.1016/0009-2614(91)90064-G. 
  10. ^ Gonzalez, L; Mo, O; Yanez, M (13 December 1996). "High-level ab initio calculations on the 1,2-dithioglyoxal/1,2-dithiete isomerism". Chemical Physics Letters. 263 (3): 407–413(7). Bibcode:1996CPL...263..407G. doi:10.1016/S0009-2614(96)01240-7.