INFRARED SPECTRA OF CARBON MONOXIDE AND CARBON DIOXIDE ADSORBED ON CHROMIA–ALUMINA AND ON ALUMINA

1962 ◽  
Vol 40 (10) ◽  
pp. 1997-2006 ◽  
Author(s):  
L. H. Little ◽  
C. H. Amberg
Keyword(s):  
Carbon Dioxide ◽  
Carbon Monoxide ◽  
Infrared Spectra ◽  
Room Temperature ◽  
Ion Formation ◽  
Carbonate Ion

Infrared spectra of CO and CO2 adsorbed on chromia–alumina and on alumina surfaces have been determined. A band near 2200 cm−1 formed by CO on both surfaces at room temperature was due to a weak, non-activated sorption, but also contained a contribution from a more strongly sorbed, activated species on the chromia–alumina. The assignment of this band was discussed in some detail. Bands in the region 1200–1800 cm−1 were considered in terms of surface CO2− species, although in certain instances the appearance of bands at 1750 and 1430 cm−1 may have indicated carbonate ion formation.

Matrix infrared spectra of the products of uranium-atom reactions with carbon monoxide and carbon dioxide

1993 ◽  
Vol 97 (42) ◽  
pp. 10920-10924 ◽  
Author(s):  
Thomas J. Tague ◽  
Lester Andrews ◽  
Rodney D. Hunt
Keyword(s):  
Carbon Dioxide ◽  
Carbon Monoxide ◽  
Infrared Spectra ◽  
Uranium Atom

PRELIMINARY STUDY OF PHOTOCHEMICAL BEHAVIOR IN THE SYSTEM NITROGEN DIOXIDE – ETHANE

1955 ◽  
Vol 33 (5) ◽  
pp. 843-848
Author(s):  
T. M. Rohr ◽  
W. Albert Noyes Jr.
Keyword(s):  
Nitric Oxide ◽  
Carbon Dioxide ◽  
Carbon Monoxide ◽  
Nitrogen Dioxide ◽  
Room Temperature ◽  
Reverse Reaction ◽  
Primary Process ◽  
Photochemical Behavior ◽  
Preliminary Study ◽  
Oxygen Atoms

The addition of ethane to nitrogen dioxide either during exposure to radiation transmitted by pyrex, or afterwards, reduces the amount of oxygen formed. At room temperature this is apparently due to the effectiveness of ethane in promoting the reverse reaction of nitric oxide and oxygen to form nitrogen dioxide. At temperatures over 100° there is a reaction which uses oxygen atoms produced in the primary process. Nitroethane (or nitrosoethane) is formed along with carbon monoxide, carbon dioxide, and some methane. The results suggest that acetaldehyde is an intermediate, but acetaldehyde could not be detected because it would react thermally with nitrogen dioxide. It is not possible to give a complete explanation of the results, but suggestions can be made which might form the basis for later work.

Oligophosphan-Liganden, XXIII. Synthese und Chemie des metallacyclischen Eisenkomplexes / Oligophosphine Ligands, XXIII. Synthesis and Chemistry of the Metallacyclic Iron Complex

1987 ◽  
Vol 42 (4) ◽  
pp. 435-440 ◽  
Author(s):  
Martin Antberg ◽  
Lutz Dahlenburg
Keyword(s):  
Carbon Dioxide ◽  
Carbon Monoxide ◽  
Nmr Spectroscopy ◽  
Room Temperature ◽  
Iron Complex ◽  
Oxidation States ◽  
Trimethyl Phosphite ◽  
Iodo Derivative

The complex (1) was obtained by reduction of FeCl2[P(CH2CH2CH2PMe2)3] with lithium dust in tetrahydrofuran at room temperature. Although an equilibrium of 1 with its iron(0) tautomer Fe[P(CH2CH2CH2PMe2)3] could not be detected by NMR spectroscopy, the coordinatively unsaturated 16e-fragment could be trapped by ligands favouring low oxidation states: trimethyl phosphite reacted with 1 to give Fe[P(OMe)3][P(CH2CH2CH2PMe2)3] (2), whereas carbon monoxide was observed to add to the metal(O) species to yield a mixture of Fe(CO)[P(CH2CH2CH2PMe2)3] (3) and -(CH2)3-PMe2 (4). 1 was completely unreactive towards dihydrogen and dinitrogen, not, however, towards carbon dioxide, which was found to insert into both the Fe-H and Fe-C bond producing (5). Methyl and benzyl iodide interacted with 1 to give the iodo derivative (6). The reaction of 1 with methanol lead to FeH2[P(CH2CH2CH2PMe2)3] (7).

THE MECHANISM OF THE PHOTOOXIDATION OF ACETALDEHYDE AT ROOM TEMPERATURE

1959 ◽  
Vol 37 (10) ◽  
pp. 1671-1679 ◽  
Author(s):  
Jack G. Calvert ◽  
Philip L. Hanst
Keyword(s):  
Carbon Dioxide ◽  
Carbon Monoxide ◽  
Acetic Acid ◽  
Detection Limit ◽  
Formic Acid ◽  
Analytical Methods ◽  
Room Temperature ◽  
Product Formation ◽  
Infrared Spectrometry ◽  
Peroxyacetic Acid

The initial rates of product formation in the photooxidation of acetaldehyde at room temperature have been determined through the use of infrared spectrometry. The rates of formation of the products peroxyacetic acid, carbon monoxide, carbon dioxide, methanol, formic acid, and acetic acid were determined in experiments with various pressures of acetaldehyde, oxygen, and added gases. The amounts of methylhydroperoxide and acetylperoxide formed in all of the experiments were below the detection limit of the analytical methods. The results require that some modification and corrections be made to the mechanism suggested by McDowell and Sharples.

INFRARED STUDY OF THE PHOTOCHEMISTRY OF TETRAMETHYLCYCLOBUTAN-1,3-DIONE

1965 ◽  
Vol 43 (12) ◽  
pp. 3165-3172 ◽  
Author(s):  
Ivan Haller ◽  
R. Srinivasan
Keyword(s):  
Carbon Monoxide ◽  
Infrared Spectra ◽  
Room Temperature ◽  
Infrared Study ◽  
Intense Absorption ◽  
Effect Of Light ◽  
Do So

The photolysis of tetramethylcyclobutan-1,3-dione was investigated in a nitrogen matrix at 4°K and in solution in cyclohexane at room temperature. Infrared spectra of the reactant after irradiation showed the formation of carbon monoxide, dimethylketene, tetramethylethylene, and a compound with an intense absorption at 1 840 cm−1 which has been identified as tetramethylcyclopropanone. Since the dimethylketene that was formed was also capable of undergoing secondary photolysis, the effect of light (mainly 2 537 Å) on dimethylketene in solution or in a nitrogen matrix, was also studied. It has been found that in solution 0.2 of the molecules of tetramethylcyclobutandione which decompose, do so to give two molecules of dimethylketene, while approximately the same number of molecules decompose to tetramethylcyclopropanone and carbon monoxide. The remainder of the molecules seem to give tetramethylethylene and carbon monoxide in a concerted process.

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