Carbonyl sulphide

Figure Bl.6.12 Ionization-energy spectrum of carbonyl sulphide obtained by dipole (e, 2e) spectroscopy [18], The incident-electron energy was 3.5 keV, the scattered incident electron was detected in the forward direction and the ejected (ionized) electron detected in coincidence at 54.7° (angular anisotropies cancel at this magic angle ). The energy of the two outgoing electrons was scaimed keeping the net energy loss fixed at 40 eV so that the spectrum is essentially identical to the 40 eV photoabsorption spectrum. Peaks are identified with ionization of valence electrons from the indicated molecular orbitals.

Caprylic acid, see Octanoic acid Caprylic alcohol, see 1-Octanol Carbitol, see Diethylene glycol monoethyl ether Carbolic acid, see Phenol Carbon disulphide Carbon monoxide Carbon oxysulphide, see Carbonyl sulphide... 

Butyl ether Butyl carbitol /i-Butyl glycidyl ether Butyl mercaptan p-tert-Butyltoluene Carbon disulphide Carbon dioxide Carbon monoxide Carbon tetrachloride Carbonyl sulphide Carbary ... 

Reactivities of carbon disulphide, carbon dioxide and carbonyl sulphide towards some transition metal systems. J. A. Ibers, Chem. Soc. Rev., 1982,11, 57-73 (78),... 

The chemistry of carbonyl sulphide (COS) and its interaction with transition metal complexes. K. K. 

Carbon oxysulphide, see Carbonyl sulphide Carbonyl sulphide 1.07 2.1 ... 

The compound carbonyl sulphide (COS) is present today in volcanic exhalations ( 0.09 mol%). Since there was certainly much more volcanic activity on the young Earth than there is today, COS was then available in sufficient amounts for chemical reactions. As laboratory experiments show, amino acids can be linked under mild conditions to form peptides. 

An unusual reaction of methoxythiocarbonyl chloride with tetra-n-butylammo-nium iodide in the presence of sodium thiosulphate leads to the formation of 0,5-dimethyl dithiocarbonate [49], The reaction appears to involve a reduction step, with the iodide anion being regenerated from the released iodine by the thiosulphate ions (Scheme 4.7). In the absence of the thiosulphate ions, the thiocarbonyl chloride decomposes to yield chloromethane and carbonyl sulphide. 

DANCKWERTS, P. V. and SHARMA, M. M. Chem. Engr. London No. 202 (Oct. 1966) CE244. The absorption of carbon dioxide into solutions of alkalis and amines (with some notes on hydrogen sulphide and carbonyl sulphide). 

The analysis of the water gas so far given enumerates the chief constituents, but in reality there are traces of other products, such as carbon bisulphide, carbonyl sulphide, and thiophene, derived from the sulphur in the uel, which, minute in quantity, may nevertheless in the certain chemical processes produce appreciable and un-iesirable results from the iron contained in the fuel, ninute amounts of iron carbonyl are formed, which in nost processes in which water gas is used is a matter jf no importance, but if the gas is to be used for ighting with incandescent mantles, its removal is de-.irable. 

Barnes, I., K. H. Becker, and I. Patroescu, FTIR Product Study of the OH Initiated Oxidation of Dimethyl Sulphide Observation of Carbonyl Sulphide and Dimethyl Sulphoxide, Atmos. Environ., 30, 1805-1814(1996). 

Carbonyl sulphide [463-58-1] M 60.1, b -47.5°. Passed through traps containing saturated aqueous... 

Carbonyl sulphide [463-58-1 ] M 60.1. Purified by scrubbing through three consecutive fritted washing flasks containing cone NaOH at 0°. Then freeze-pumped repeatedly and distd through a trap packed with glass wool and cooled to -130° (using an n-pentane slurry). 

Carbonyl Sulphide or Carbon Oxysulphide, COS.—Carbonyl sulphide, discovered by Than,5 is formed synthetically when a mixture of sulphur vapour and carbon monoxide is passed through a hot tube. The action is reversible,... 

Carbonyl sulphide is also formed by the interaction of carbon disulphide and sulphur trioxide, thus ... 

Some thiocarbonates yield carbonyl sulphide on decomposition, thus 2... 

An important method of preparing carbonyl sulphide consists in the decomposition of a thiocyanate with moderately concentrated (14-/V) sulphuric acid, the liberated thiocyanic acid being hydrolysed thus ... 

The carbonyl sulphide is evolved at 20° C. together with hydrocyanic acid, formic acid and carbon disulphide. The gas is purified by passing through concentrated aqueous caustic potash to absorb the acid vapours, and the carbon disulphide is absorbed in a mixture of triethylphosphine, pyridine and nitrobenzene. After drying with sulphuric acid, the gas may be further purified by liquefaction or absorption in toluene.3... 

Carbonyl sulphide may also be obtained by the action of hydrochloric acid on commercial ammonium thiocarbamate, according to the equation ... 

Properties.—Pure carbonyl sulphide is a colourless, odourless gas, which is slowly decomposed by water. When dry it is stable, even in sunlight, and if kept over sulphuric acid it undergoes only slight decomposition. Its density at —87° C. is 1-24. It melts at —138-2° C. and boils at -50-2° C. under a pressure of 760 mm.4... 

The thermal decomposition of carbonyl sulphide has been investigated.5 The products of dissociation may be carbon monoxide and... 

At 800° C. reaction (2) appears to proceed slowly in either direction, while (1) is very rapid. The fact that the degree of dissociation in (1) is. independent of the amounts of carbon dioxide and carbon disulphide present, shows that carbon monoxide and sulphur are primary products of the decomposition of carbonyl sulphide and are not formed secondarily from the carbon dioxide and carbon disulphide. At temperatures below 400° C. decomposition according to equation (1) is not evident, while at 900° C. it reaches a maximum (64 per cent.) reaction (2) reaches a maximum at about 600° C., at which point 43 per cent, of the carbonyl sulphide is decomposed in this way and 16 per cent, according to reaction (1). The carbon monoxide equilibrium depends upon the pressure, whilst the carbon dioxide equilibrium does not. Nearly all the reactions involved in the thermal decomposition of carbonyl sulphide depend greatly on catalytic influences. Quartz is a pronounced catalyst for reaction (2), but has little influence on reaction (1). Carbonyl sulphide is comparatively rapidly decomposed in quartz vessels, but is stable when kept in glass apparatus. The viscosity of gaseous carbonyl sulphide is as follows x... 

The physiological effects of carbonyl sulphide are very similar to those of nitrous oxide. 

When the pure gas is passed through a saturated solution of barium hydroxide or copper sulphate, no opalescence or precipitate is produced for at least half a minute if any carbon dioxide is present, however, the solution becomes milky at once. According to Weeldenburg2 there is no reaction between carbonyl sulphide and copper sulphate in neutral or acid solution, nor is there any reaction with iodine or ethereal tri-ethylphosphine (qf. CS2, p. 263). 

Carbonyl sulphide burns with a blue flame, forming carbon dioxide and sulphur dioxide. With air it forms a mixture which is slightly explosive except when quite dry.3 The explosive limits lie between 11-9 and 28-5 per cent, of carbonyl sulphide.4 A white-hot platinum wire completely decomposes the sulphide into carbon monoxide and sulphur. 

Water slowly decomposes carbonyl sulphide, forming carbon dioxide and hydrogen sulphide ... 

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