Carbon sulfide selenide or thiocarbonyl selenide is a triatomic molecular compound with formula S=C=Se.
Production Carbon sulfide selenide was made by Henry Vincent Aird Briscoe by passing carbon disulfide vapour over ferrous selenide.
CS2 + FeSe → CSSe + FeS
Earlier it was made by passing an electric arc through liquid carbon disulfide in the presence of selenium. Properties Carbon sulfide selenide appears as a dark yellow oily liquid. Its boiling point is about 83.92°C at 749.2 mmHg pressure. The density of the liquid at 25° is 1.9777 Mg/m3. Coefficient if cubic expansion is 0.000996.
The liquid does not wet glass. It is immiscible in water, but dissolves in acetone, benzene, bromoform or ethyl alcohol.
The C-S bond length is 1.553 Å and the C-Se bond length is 1.695 Å
The effect on humans is lachrymatory, the vapour is extremely irritating to mucous membranes, and it smells disgusting. Microwave spectrum
isotopologground state rotational constant MHzvibration‐rotation constant α2 MHzl‐type doubling constant qlcentrifugal distortion constant Dj kHz32S12C76Se2078.190−4.2151.04132S12C78Se2060.321−4.1691.0210.2232S12C80Se2043.310−4.1331.0050.16332S12C82Se2027.113−4.1160.996 Molecular force field for C-Se: 5.72 mdyn/Å and C-S: 7.97 mdyn/Å. Dipole moment is 0.031 D.
Reactions Carbon sulfide selenide reacts with zinc and hydrochloric acid yielding hydrogen sulfide and hydrogen selenide.
Carbon sulfide selenide reacts with dimethyl acetylenedicarboxylate under high pressure to yield a dithiadiselenafulvalene derivative.
Reduction of carbon sulfide selenide forms a 1,3-dichalcogenole-2-chalcogenone-4,5-dichalcogenolate, but is a mixture of S and Se substances. Selenium is in the 4,5 charged positions.
A reaction with iodine and azide with carbon sulfide selenide results in the formation of selenium.
Carbon sulfide selenide reacts with chlorine gas to form thiocarbonyl tetrachloride and selenium tetrachloride. It does not react with iodine by itself, but only dissolves it.
CSSe + 4 Cl2 → ClSCCl3 + SeCl4
Carbon sulfide selenide reacts with bromine liquid to form thiocarbonyl tetrabromide and selenium tetrabromide and also some C2S2SeBr6.
CSSe + 4 Br2 → BrSCBr3 + SeBr4
Carbon sulfide selenide can complex with palladium. It reacts with Pd[P(CH(CH3)2)3]2, Pd[P(CH(CH3)2)3]3 or Pd[P(C6H5)3]4] to displace all but two of the ligands to add CSSe as a bidentate ligand. P(CH(CH3)2)3 also reacts with CSSe to yield [P(CH(CH3)2)3]+[CSSe]−. For these reactions, methanol can be a solvent. C and Se atoms are ligands to the metal. The bonds in C=S and C=Se are lengthened in the ligand. The bond opposite to the C atom is lengthened.
Complexes formulanamestructurecommentreferenceC5H5Co(PMe3)(η2-CSSe)Pd[P(CH(CH3)2)3]2(η2-CSSe)Pd[P(C6H5)3]2(η2-CSSe)(diphos)Pd(η2-CSSe)(dpmb)Pd(η2-CSSe)P21/c a=9.585 b=15.02 c=21.50 Å β=103.1°planarOs(η2-CSSe)(CO)(CN-p-tol)(PPh3)2Os(η2-CSeS)(CO)(CN-p-tol)(PPh3)2Ru(η2-CSSe)(CO)(CN-p-tol)(PPh3)2Ru(η2-CSeS)(CO)(CN-p-tol)(PPh3)2
References