SEARCH Articles Figures Tables FUNCTIONAL COMPOUNDS CONTAINING OXYGEN, SULPHUR OR NITROGEN AND THEIR DERIVATIVES Four-membered Rings containing Oxygen and One Sulphur Atom Four-membered Rings containing Sulphur and Oxygen Fused Heterocycles containing One Oxygen or Sulphur Atom Heterocycles Containing Nitrogen, Oxygen, and Sulphur Metal—sulphur oxygen systems Other Oxygen- and Sulphur-containing Systems Oxygen and Sulphur Derivatives Oxygen and sulphur Oxygen and sulphur donor ligands Oxygen, Sulphur, Selenium, and Tellurium Oxygen, Sulphur, and Selenium Oxygen- and Sulphur-containing Heterocycles Oxygen-, Sulphur-, and Selenium-bonded Compounds Phosphorus-Oxygen-Sulphur Compounds REACTIONS WITH ELECTROPHILIC OXYGEN AND SULPHUR Six-Membered Rings containing Oxygen or Sulphur Sulphur dioxide, reaction with oxygen Sulphur dioxide/oxygen mixture Sulphur, reaction with hydrogen oxygen Sulphur, replacing oxygen Sulphur- or Oxygen-bonded Compounds Sulphur-Oxygen Compounds Sulphur-Oxygen-Halogen Compounds