Compounds containing the boron-chalcogen B-E (E.S, Se, Te) bond -- Thiolates, selenolates, and tellurolates -- Recent developments in the chemistry of thio-, seleno- and telluro-ethers -- Chalcogenone C.E compounds -- Thioamides, thioureas and related selenium and tellurium compounds -- The compounds between Si, Ge and Sn and chalcogens (S, Se, and Te) having both a single bond and a double bond (heavy ketones) -- Chalcogen-nitrogen chemistry -- Chalcogen-phosphorus (and heavier congeners) chemistry -- Chalcogen-oxygen chemistry -- Structure and bonding of the neutral chalcogens and their polyatomic cations -- Organochalcogen multication species -- Recent developments in binary halogen-chalcogen compounds, polyanions and polycations -- Charge-transfer (C.-T.) Adducts and related compounds -- Metal chalcogenides : clusters, layers, nanotubes -- Polychalcogenides -- Synthesis and stereochemistry of optically active chalcogen compounds -- 1,1-dithiolato ligands and related selenium and tellurium compounds -- Hypervalent chalcogen compounds -- Chalcogens (S, Se, Te) in microorganisms and plants -- Metal-sulfur clusters as the model for the active sites of metalloenzymes -- Stable chalcogen radicals -- Chalcogen-rich compounds as electron donors -- 1,2-dithiolene ligands and related selenium and tellurium compounds -- Chalcogen-halogen secondary bonds in self-assembling of supramolecular structures.