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It thus tends to form a covalent bond with another S − center to form S 2− 2 group, similar to elemental chlorine existing as the diatomic Cl 2. Oxygen may also behave similarly, e.g. in peroxides such as H 2 O 2. Examples: Hydrogen disulfide (S 2 H 2), the simplest inorganic disulfide; Disulfur dichloride (S 2 Cl 2), a distillable liquid.
The bonding between adjacent atoms in a chain is covalent, but there is evidence of a weak metallic interaction between the neighbouring atoms of different chains. [387] Tellurium is a semiconductor with an electrical conductivity of around 1.0 S•cm −1 [ 388 ] and a band gap of 0.32 to 0.38 eV. [ 389 ]