Carbon diselenide

Carbon diselenide is an organoselenium compound with the chemical formula CSe₂. It is analogous to carbon disulfide (CS₂), but with selenium atoms replacing the sulfur atoms. This compound is of interest in the field of inorganic chemistry and has applications in materials science and organic synthesis.

Structure and Properties

Carbon diselenide is a linear molecule, similar to carbon disulfide, with a central carbon atom double-bonded to two selenium atoms. The molecule is characterized by its yellowish color and distinctive odor. It is a volatile liquid at room temperature, with a boiling point of 125 °C and a melting point of -45 °C.

The compound is less stable than carbon disulfide, due to the larger size and lower electronegativity of selenium compared to sulfur. This results in weaker C-Se bonds compared to C-S bonds.

Synthesis

Carbon diselenide can be synthesized by the reaction of selenium with carbon tetrachloride in the presence of a catalyst. Another method involves the reaction of selenium with carbon disulfide under high temperature and pressure conditions.

Applications

While not as widely used as carbon disulfide, carbon diselenide has potential applications in the synthesis of organoselenium compounds, which are valuable in pharmaceutical chemistry and materials science. Its reactivity with various organic substrates makes it a useful reagent in the formation of carbon-selenium bonds.

Safety and Handling

Carbon diselenide is a hazardous material and should be handled with care. It is toxic if inhaled or ingested and can cause irritation to the skin and eyes. Proper protective equipment, such as gloves and goggles, should be used when handling this compound. It should be stored in a cool, well-ventilated area away from sources of ignition.

Also see

• Carbon disulfide
• Organoselenium chemistry
• Selenium compounds
• Inorganic chemistry