Carbon monosulfide

Carbon monosulfide [2944-05-0] CS, is an unstable gas produced by the decomposition of carbon disulfide at low pressure ia a silent electrical discharge or photolyticaHy (1 3) ia the presence or absence of sulfur (3). It decomposes with a half-life of seconds or minutes to a black soHd of uncertain composition (1—3). The monosulfide can be stabilized ia a CS2 matrix at — 196°C, and many stable coordination complexes of CS with metals have been prepared by iadirect means (8). 

Carbon monosulfide, CS, which can be produced by passiag CS2 through a high voltage discharge, can react with C H SCl at low temperatures ia toluene to give CgH SC(S)Cl. In a similar manner CS reacts with S2CI2 by double iasertion to yield C1C(S)SSC(S)C1 (9). Carbon monosulfide can also react with amines or thiols ia toluene or DMF (10). A review of the synthetic utiUty of CS has been pubUshed (11). 

Thiocarbonyl and Selenocarbonyl (Carbon Monosulfide and Carbon Monoselenide) 860, 949,1062... 

Fig. 5.1 Sample IJs) curves for various vibrational states of carbon monosulfide, C = S. These curves were calculated2 in accordance with Eq. (5.2), using i )y(r) functions obtained by solving Schrodinger s equation with an experimental potential energy surface derived from molecular spectroscopy.

Fig. 5.2 Radial distribution curves, Pv

Two other compounds containing carbon and sulfur should be mentioned. The first of these is carbon monosulfide, CS. This compound has been reported to be produced by the reaction of CS2 with ozone. The second compound is COS or, more correctly, OCS (m.p. -138.2 °C and b.p. -50.2 °C). It is prepared by the reaction... 

Whereas the diatomic molecules carbon monoxide and carbon monosulfide can readily be synthesized, attempts to isolate the analogous carbon monoselenide... 

Carbon Monoxide and Carbon Monosulfide.—It was stated in Chap-... 

In addition to carbon disulfide (odorless when pure), carbon subsulfidc, —C—C—C—S, an evil-smelling red oil and carbon monosulfide, (CSX), are known as well as COS, CSSe and CSTe. Because of its similarity to oxygen, and the reactivity of its acids, sulfur enters widely into organic compounds. 

CARBON DISULFIDE AND CARBON MONOSULFIDE AS LIGANDS 16.4.2.1 Introduction... 

CS2, the analogue of C02, reacts with e aq at a faster rate (k = 3.1 0.3 X 1010 M-1 sec.-1) (68) which is diffusion controlled. It is not surprising that the C=S bond is more reactive toward e aq than the carbonyl bond, since the lower electronegativity of the sulfur atom makes its additional orbitals more liable to accommodate an additional electron. It is very likely that a long lived CS2- is produced, which eventually is reduced to carbon monosulfide however this requires verification. It... 

CS)ar (c). Dewar2 measured the heat of combustion of solid polymerized carbon monosulfide. 

New iridacyclobutadiene intermediates have been isolated in the [2+2+1+1] cycloaddition reaction that yields iridabenzene complexes from two alkynes, carbon monosulfide, and the metal (Section 2.12.5). The iridacyclobutadiene ring can be transformed, alternatively, into the corresponding r/s-cyclopcntadicnyl complex or into the iridabenzene product by reaction with additional alkyne, depending on the substituents present on both the iridacyclobutadiene ring and the incoming alkyne. 

Mass spectral data have been obtained for compounds (20), (21), (22), and (23). The data show that the most abundant peak for each is the molecular ion. Considerable amounts of (M — 1)+ and M+2 ions are also formed. Loss of HCN from the molecular ion is evidence for the pyridine ring, while loss of carbon monosulfide and/or the thioformyl radical are characteristic of the thiophene ring <75JHC865>. Mass spectral fragmentation patterns have also been reported for the halo- and halonitrothienopyridines (Scheme 3) <70AK(32)249,74JHC205). 

M. D. Huang, H. Becker-Ross, S. Florek, U. Heitmann, M. Okruss, Determination of sulfur by molecular absorption of carbon monosulfide using a high-resolution continuum source absorption spectrometer and an air-acetylene flame, Spectrochim. Acta, 61B (2006), 181. 

Raine, G. P., H. F. Schaefer III, and R. C. Haddon (1983). The dimers of carbon monoxide and carbon monosulfide. Chemically bound triplet electronic ground states. J. Am. Chem. Soc. 105, 194-98. 

The microwave spectra of carbon monosulfide have been critically reviewed by Lovas and Krupenie ( ). Their derived rotational constants are in agreement with those adopted. 

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