At lower metal concentrations, salts of the monovalent anions CO−2 were favored over CO2−2. Carbonite was not detected when sodium was used as the metal.[2] The alkali metal carbonites obtained in the cryogenic experiments decomposed to the corresponding carbonate (with release of carbon monoxide) or oxalate.[1][2] The carbonite ion is promptly converted to carbonate in the presence of oxygen.[3][4]
The presence of carbonite ions has been proposed to be relevant to the absorption of carbon monoxide on calcium oxide and magnesium oxide[3] and on ceria.[4] In the former, it has been suggested that the carbon atom attaches via a coordinate covalent bond to an oxygen atom from the substrate through its free bonds.[3] In these contexts, it appears that the carbonite ion reacts with excess carbon monoxide to form an anion with the ketene structure, O=C=C(−O−)2.[3]
Infrared spectroscopy data confirm earlier theoretical studies that the carbonite anion has a bent structure, with the O−C−O angle varying between 120° and 130° depending on the context. The metal atoms interact with both oxygen atoms. However two geometrical arrangements for the lithium and caesium salts were detected, only one of them being symmetrical on the two oxygen atoms.[1][2]
Referencesedit
^ abcKafafi, Zakya H.; Hauge, Robert H.; Billups, W. Edward; Margrave, John L. (1983). "Carbon dioxide activation by lithium metal. 1. Infrared spectra of Li+CO2–, Li+C2O4–, and Li22+CO22– in inert-gas matrices". Journal of the American Chemical Society. 183: 3886–3893. doi:10.1021/ja00350a025.
^ abcdKafafi, Zakya H.; Hauge, Robert H.; Billups, W. Edward; Margrave, John L. (1984). "Carbon dioxide activation by alkali metals. 2. Infrared spectra of M+CO2– and M22+CO22– in argon and nitrogen matrices". Inorganic Chemistry. 23: 177–183. doi:10.1021/ic00170a013.
^ abcdBabaeva, M. A.; Tsyganenko, A. A. (1987). "Infrared spectroscopic evidence for the formation of carbonite CO2− 2 ions in CO interaction with basic oxide surfaces". Reaction Kinetics and Catalysis Letters. 34 (1): 9–14. doi:10.1007/BF02069193.
^ abBinet, Claude; Ahmed Badri; Magali Boutonnet-Kizling; Jean-Claude Lavalley (1994). "FTIR study of carbon monoxide adsorption on ceria: CO22– carbonite dianion adsorbed species". Journal of the Chemical Society, Faraday Transactions. 90 (7): 1023–1028. doi:10.1039/FT9949001023.
April 11, 2024
carbonite, carbonite, anion, with, with, chemical, formula, this, divalent, anion, forms, deprotonation, carbonous, acid, alkali, metal, salts, carbonous, acid, li2co2, lithium, carbonite, k2co2, potassium, carbonite, rb2co2, rubidium, carbonite, cs2co2, caesi. The carbonite ion is an anion with the with the chemical formula CO2 2 This divalent anion forms by deprotonation of carbonous acid C OH 2 Alkali metal salts of carbonous acid Li2CO2 lithium carbonite K2CO2 potassium carbonite Rb2CO2 rubidium carbonite and Cs2CO2 caesium carbonite have been observed at 15 K 1 2 Interestingly sodium does not form a carbonite why Due to the lone pair on the carbon atom salts of the carbonite ion would be protonated to form formate and formic acid rather than the carbene citation needed Carbonite ion Identifiers3D model JSmol Interactive imageInChI InChI 1S CO2 c2 1 3 q 2Key DEXSTXPKYXOQOB UHFFFAOYSA NSMILES C O O PropertiesChemical formula CO2 2Molar mass 44 009 g mol 1Conjugate acid BicarboniteRelated compoundsRelated compounds CarbonateCarbon monoxideCarbon dioxideOxalateBicarboniteCarbonous acidExcept where otherwise noted data are given for materials in their standard state at 25 C 77 F 100 kPa Infobox references At lower metal concentrations salts of the monovalent anions CO 2 were favored over CO2 2 Carbonite was not detected when sodium was used as the metal 2 The alkali metal carbonites obtained in the cryogenic experiments decomposed to the corresponding carbonate with release of carbon monoxide or oxalate 1 2 The carbonite ion is promptly converted to carbonate in the presence of oxygen 3 4 The presence of carbonite ions has been proposed to be relevant to the absorption of carbon monoxide on calcium oxide and magnesium oxide 3 and on ceria 4 In the former it has been suggested that the carbon atom attaches via a coordinate covalent bond to an oxygen atom from the substrate through its free bonds 3 In these contexts it appears that the carbonite ion reacts with excess carbon monoxide to form an anion with the ketene structure O C C O 2 3 Infrared spectroscopy data confirm earlier theoretical studies that the carbonite anion has a bent structure with the O C O angle varying between 120 and 130 depending on the context The metal atoms interact with both oxygen atoms However two geometrical arrangements for the lithium and caesium salts were detected only one of them being symmetrical on the two oxygen atoms 1 2 References edit a b c Kafafi Zakya H Hauge Robert H Billups W Edward Margrave John L 1983 Carbon dioxide activation by lithium metal 1 Infrared spectra of Li CO2 Li C2O4 and Li22 CO22 in inert gas matrices Journal of the American Chemical Society 183 3886 3893 doi 10 1021 ja00350a025 a b c d Kafafi Zakya H Hauge Robert H Billups W Edward Margrave John L 1984 Carbon dioxide activation by alkali metals 2 Infrared spectra of M CO2 and M22 CO22 in argon and nitrogen matrices Inorganic Chemistry 23 177 183 doi 10 1021 ic00170a013 a b c d Babaeva M A Tsyganenko A A 1987 Infrared spectroscopic evidence for the formation of carbonite CO2 2 ions in CO interaction with basic oxide surfaces Reaction Kinetics and Catalysis Letters 34 1 9 14 doi 10 1007 BF02069193 a b Binet Claude Ahmed Badri Magali Boutonnet Kizling Jean Claude Lavalley 1994 FTIR study of carbon monoxide adsorption on ceria CO22 carbonite dianion adsorbed species Journal of the Chemical Society Faraday Transactions 90 7 1023 1028 doi 10 1039 FT9949001023 Retrieved from https en wikipedia org w index php title Carbonite ion amp oldid 1216691678, wikipedia, wiki, book, books, library,
