Selenide COSe

Cobalt(II) sulfide, CoS cobalt disulfide, C0S2 cobalt(III) sulfide, C02S3 cobalt(II) selenide, CoSe cobalt selenium, CoSc2 (trogtalite) cobalt(II) telluride, CoTe. 

Carbon diselenide CSe2 Carbonyl selenide COSe. Hydrogen selenide HjSe... 

Cobalt Selenide, CoSe, is yielded in an amorphous condition by heating cobalt in selenium vapour. It also results when hydrogen selenide is passed over cobalt oxide, or preferably the anhydrous chlorate, at bright red heat. 

Carbon Oxyselenide, COSe.—By the action of carbonyl chloride on cadmium selenide heated to redness, von Bartal 4 obtained a gas which contained selenium and which was probably carbon oxyselenide. The gas did not liquefy at — 80° C. 

The spectra of alkene selenides persists for several minutes after flashing. A spectrum observed in flashed COSe and ethylene mixture is identical to that produced in flashed CSe2 and ethylene mixture. In Ar or N2, flash photolysis of COSe produces Se2 but no CSe. An added alkene inhibits Se2 formation in experiments either with COSe or CSe2. In flashed CSe2, the rate of decay of Se (4 P) is identical to the rate of appearance of the far ultraviolet bands, within an experimental scatter of + 20% in the pseudo first-order rate constant. Therefore the absorption in the far... 

As shown in Table 1, other metallic (ZnSe, CoSe, Bi2Sc3, NiSe) and non metallic (Sb2Se3) selenide binaries have been deposited successfully. 

Two further examples of the usefulness of the R-line diagram in the estimation of Na or Xa values in difficult systems are afforded by the following papers. Pearson and Robinson (1932) found a molecular weight of 103.0 for carbonyl selenide (bp —22.9°C) from the gas density at 0 C, whereas its actual molecular weight is 107.2. The discrepancy was attributed to the presence of either carbon monoxide or carbon dioxide, which were stated to be appreciably soluble in the liquid. Under the conditions stated, Xccb would not be more than 0.05, and xco not more than 0.01, The solubility pattern of COSe itself can be approximately assessed by reference to Fig. 140. The R-line values for COSe at 0°C may be assessed at Ncose = 0-41, cose = 0.7 for 1 atm, based on the vapor-pressure data. 

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