Title: Carbon Diselenide

CAS Registry Number: 506-80-9

CAS Name: Carbon selenide

Molecular Formula: CSe2

Molecular Weight: 169.93

Percent Composition: C 7.07%, Se 92.93%

Literature References: Prepd by the action of methylene chloride vapor on heated selenium: Ives et al., J. Chem. Soc. 1947, 1080; or from a mixture of CCl4 and H2Se in a stream of N2 at 500°: Grimm, Metzger, Ber. 69, 1356 (1936); from the elements by electrical discharge on Se vapor in the presence of sugar charcoal: Steudel, Z. Anorg. Allg. Chem. 361, 195 (1968).

Properties: Light-sensitive, golden yellow, strongly refractive, liquid. Odor of rotten radishes. Turns brown to black on storage. d420 2.6824; d425 2.6626. mp -45.5°. bp 125-126°; bp8.0 10.0°. nD20 1.845. Heat of formation: 34 kcal/mol. Miscible with carbon tetrachloride, carbon disulfide, toluene, other organic solvents. Practically insol in water. Dec by alc, pyridine.

Melting point: mp -45.5°

Boiling point: bp 125-126°; bp8.0 10.0°

Index of refraction: nD20 1.845

Density: d420 2.6824; d425 2.6626