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Soyluoglu M, Kim D, Karanfil T. Characteristics and Stability of Ozone Nanobubbles in Freshwater Conditions. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2023; 57:21898-21907. [PMID: 38085154 DOI: 10.1021/acs.est.3c07443] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/27/2023]
Abstract
The characteristics and stability of ozone nanobubbles (NBs) were investigated for the first time under different preparation conditions and freshwater conditions (i.e., pH, natural organic matter [NOM], carbonate, calcium, and temperature) for an extended period. Two oxygen gas flow rates (4 and 1 L/min) used in ozone NB generation affected the characteristics and stability of ozone NBs. The ozone NBs generated at a high initial dissolved ozone (12.5 mg/L) concentration showed a much higher brightness during measurements than the ozone NBs generated at a low initial dissolved ozone concentration (1 mg/L). The former also exhibited a higher negative surface charge and higher stability in comparison to the latter. The stability and half-lives of ozone NBs followed the order of 3 mM Ca2+ < pH 3 < NOM with high specific ultraviolet absorbance at 254 nm (SUVA254 = 4.1 L/mg·m) < pH 7 < pH 9, while the effects of carbonate and temperature were insignificant. Ozone NBs were relatively stable in waters for a long period (e.g., ≥ 60 days) except for high hardness or low pH conditions. Higher levels of hydroxyl radicals were produced from ozone NB solutions as compared to conventional ozonation.
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Affiliation(s)
- Meryem Soyluoglu
- Department of Environmental Engineering and Earth Sciences, Clemson University, Anderson, South Carolina 29625, United States
| | - Daekyun Kim
- Department of Environmental Engineering and Earth Sciences, Clemson University, Anderson, South Carolina 29625, United States
| | - Tanju Karanfil
- Department of Environmental Engineering and Earth Sciences, Clemson University, Anderson, South Carolina 29625, United States
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2
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Dong M, Liu YD, Zhong R. NDMA formation mechanisms from typical hydrazines and hydrazones during ozonation: A computational study. JOURNAL OF HAZARDOUS MATERIALS 2019; 366:370-377. [PMID: 30544038 DOI: 10.1016/j.jhazmat.2018.12.012] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/29/2018] [Revised: 12/01/2018] [Accepted: 12/03/2018] [Indexed: 06/09/2023]
Abstract
N-nitrosodimethylamine (NDMA) as the most frequently detected disinfection by-product has aroused widespread concern due to its unusually high carcinogenicity, however, there is still limited understanding of its formation mechanisms. In this study, the formation mechanisms of NDMA from some typical hydrazines and hydrazones with high NDMA conversion yields (60%∼90%) during ozonation, i.e., unsymmetrical dimethylhydrazine (UDMH), 1-formyl-2,2-dimethylhydrazine (FDMH), formaldehyde dimethylhydrazone (FDH) and acetone dimethylhydrazone (ADMH), were investigated by using DFT method with the M05 functional. A new NDMA formation mechanism from hydrazines during ozonation was proposed, in which the initial step is hydrogen abstraction rather than previously reported oxygen addition. For hydrazones, the C atom of the -N = C moiety in hydrazones is preferred to be attacked by ozone to generate N,N-dimethylaminonitrene (DMAN), which is an important intermediate in NDMA formation during ozonation. Moreover, the reactivity order of the following H atoms in hydrogen/hydride ion abstraction (HA) by ozone is -NH2 > -N(CH3)2 > -CO-NH ∼ =C(CH3)2 > =CH-. Additionally, formation pathways of some experimentally detected compounds, i.e., HOOOH, HOOH and HCOH, in the ozonation of hydrazine were elucidated in this study. The results are expected to expand our understanding of NDMA formation mechanisms and ozone reaction characteristics.
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Affiliation(s)
- Meng Dong
- Beijing Key Laboratory of Environmental and Viral Oncology, College of Life Science & Bioengineering, Beijing University of Technology, Beijing, 100124, China
| | - Yong Dong Liu
- Beijing Key Laboratory of Environmental and Viral Oncology, College of Life Science & Bioengineering, Beijing University of Technology, Beijing, 100124, China.
| | - Rugang Zhong
- Beijing Key Laboratory of Environmental and Viral Oncology, College of Life Science & Bioengineering, Beijing University of Technology, Beijing, 100124, China
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Lee R, Coote ML. Mechanistic insights into ozone-initiated oxidative degradation of saturated hydrocarbons and polymers. Phys Chem Chem Phys 2016; 18:24663-71. [DOI: 10.1039/c6cp05064f] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Accurate quantum chemistry is used to identify the mechanism of ozonation of saturated C–H hydrocarbons and various polymer dimer units, and to show that the process can be catalysed by water and plays an important role in environmental polymer degradation.
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Affiliation(s)
- Richmond Lee
- ARC Centre of Excellence for Electromaterials Science
- Research School of Chemistry
- Australian National University
- Canberra ACT 2601
- Australia
| | - Michelle L. Coote
- ARC Centre of Excellence for Electromaterials Science
- Research School of Chemistry
- Australian National University
- Canberra ACT 2601
- Australia
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Denis PA, Huelmo CP. New trends along hydrogen polyoxides: unusually long oxygen–oxygen bonds in H2O6and H2O7. Mol Phys 2014. [DOI: 10.1080/00268976.2014.928385] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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6
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Cerkovnik J, Plesničar B. Recent advances in the chemistry of hydrogen trioxide (HOOOH). Chem Rev 2013; 113:7930-51. [PMID: 23808683 DOI: 10.1021/cr300512s] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Affiliation(s)
- Janez Cerkovnik
- Department of Chemistry, Faculty of Chemistry and Chemical Technology, University of Ljubljana , 1000 Ljubljana, Slovenia
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Anglada JM, Torrent-Sucarrat M, Ruiz-Lopez MF, Martins-Costa M. Is the HO4−Anion a Key Species in the Aqueous-Phase Decomposition of Ozone? Chemistry 2012; 18:13435-45. [DOI: 10.1002/chem.201201991] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2012] [Indexed: 11/10/2022]
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Suarez-Bertoa R, Saliu F, Bruschi M, Rindone B. Reaction products and mechanism of the regioselective oxidation of N-phenylmorpholine by ozone. Tetrahedron 2012. [DOI: 10.1016/j.tet.2012.07.055] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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Gerothanassis IP. Oxygen-17 NMR spectroscopy: basic principles and applications (part I). PROGRESS IN NUCLEAR MAGNETIC RESONANCE SPECTROSCOPY 2010; 56:95-197. [PMID: 20633350 DOI: 10.1016/j.pnmrs.2009.09.002] [Citation(s) in RCA: 82] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/18/2009] [Accepted: 09/24/2009] [Indexed: 05/29/2023]
Affiliation(s)
- Ioannis P Gerothanassis
- Section of Organic Chemistry and Biochemistry, Department of Chemistry, University of Ioannina, Ioannina GR-451 10, Greece.
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Denis PA, Ornellas FR. Theoretical Characterization of Hydrogen Polyoxides: HOOH, HOOOH, HOOOOH, and HOOO. J Phys Chem A 2008; 113:499-506. [DOI: 10.1021/jp808795e] [Citation(s) in RCA: 50] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Pablo A. Denis
- Computational Nanotechnology, DETEMA, Facultad de Química, UDELAR, CC 1157, 11800 Montevideo, Uruguay, and Instituto de Química, Universidade de São Paulo, Caixa Postal 26077, São Paulo, São Paulo, 05513-970, Brazil
| | - Fernando R. Ornellas
- Computational Nanotechnology, DETEMA, Facultad de Química, UDELAR, CC 1157, 11800 Montevideo, Uruguay, and Instituto de Química, Universidade de São Paulo, Caixa Postal 26077, São Paulo, São Paulo, 05513-970, Brazil
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Cerkovnik J, Plesničar B, Koller J, Tuttle T. Hydrotrioxides Rather than Cyclic Tetraoxides (Tetraoxolanes) as the Primary Reaction Intermediates in the Low-Temperature Ozonation of Aldehydes. The Case of Benzaldehyde. J Org Chem 2008; 74:96-101. [DOI: 10.1021/jo801594n] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Affiliation(s)
- Janez Cerkovnik
- Department of Chemistry, Faculty of Chemistry and Chemical Technology, University of Ljubljana, P.O. Box 537, 1000 Ljubljana, Slovenia, and WestCHEM, Department of Pure and Applied Chemistry, University of Strathclyde, 295 Cathedral Street, Glasgow G1 1XL, U.K
| | - Božo Plesničar
- Department of Chemistry, Faculty of Chemistry and Chemical Technology, University of Ljubljana, P.O. Box 537, 1000 Ljubljana, Slovenia, and WestCHEM, Department of Pure and Applied Chemistry, University of Strathclyde, 295 Cathedral Street, Glasgow G1 1XL, U.K
| | - Jože Koller
- Department of Chemistry, Faculty of Chemistry and Chemical Technology, University of Ljubljana, P.O. Box 537, 1000 Ljubljana, Slovenia, and WestCHEM, Department of Pure and Applied Chemistry, University of Strathclyde, 295 Cathedral Street, Glasgow G1 1XL, U.K
| | - Tell Tuttle
- Department of Chemistry, Faculty of Chemistry and Chemical Technology, University of Ljubljana, P.O. Box 537, 1000 Ljubljana, Slovenia, and WestCHEM, Department of Pure and Applied Chemistry, University of Strathclyde, 295 Cathedral Street, Glasgow G1 1XL, U.K
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de Petris G, Cartoni A, Rosi M, Troiani A. The HSSS Radical and the HSSS− Anion. J Phys Chem A 2008; 112:8471-7. [DOI: 10.1021/jp8055637] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Giulia de Petris
- Dipartimento di Chimica e Tecnologie del Farmaco, Università “La Sapienza”, Piazzale Aldo Moro 5, 00185 Rome, Italy, and Dipartimento di Ingegneria Civile ed Ambientale—Sezione Tecnologie Chimiche e Materiali per l’Ingegneria, ISTM-CNR—Università di Perugia, Via Duranti, I-06131, Perugia, Italy
| | - Antonella Cartoni
- Dipartimento di Chimica e Tecnologie del Farmaco, Università “La Sapienza”, Piazzale Aldo Moro 5, 00185 Rome, Italy, and Dipartimento di Ingegneria Civile ed Ambientale—Sezione Tecnologie Chimiche e Materiali per l’Ingegneria, ISTM-CNR—Università di Perugia, Via Duranti, I-06131, Perugia, Italy
| | - Marzio Rosi
- Dipartimento di Chimica e Tecnologie del Farmaco, Università “La Sapienza”, Piazzale Aldo Moro 5, 00185 Rome, Italy, and Dipartimento di Ingegneria Civile ed Ambientale—Sezione Tecnologie Chimiche e Materiali per l’Ingegneria, ISTM-CNR—Università di Perugia, Via Duranti, I-06131, Perugia, Italy
| | - Anna Troiani
- Dipartimento di Chimica e Tecnologie del Farmaco, Università “La Sapienza”, Piazzale Aldo Moro 5, 00185 Rome, Italy, and Dipartimento di Ingegneria Civile ed Ambientale—Sezione Tecnologie Chimiche e Materiali per l’Ingegneria, ISTM-CNR—Università di Perugia, Via Duranti, I-06131, Perugia, Italy
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Pullabhotla VR, Southway C, Jonnalagadda S. Oxidation of n-hexadecane with uranyl loaded/anchored microporous zeolites and ozone. CATAL COMMUN 2008. [DOI: 10.1016/j.catcom.2008.03.014] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
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Rajasekhar Pullabhotla VSR, Southway C, Jonnalagadda SB. Ozone Initiated Oxidation of Hexadecane with Metal Loaded γ-Al2O3 Catalysts. Catal Letters 2008. [DOI: 10.1007/s10562-008-9434-4] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Elliott BM, Boldyrev AI. The Oxygen-Rich Carboxide Series: COn (n = 3, 4, 5, 6, 7, or 8). J Phys Chem A 2005; 109:3722-7. [PMID: 16839040 DOI: 10.1021/jp0449455] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Abstract
The lowest-energy isomers of the high-order carboxide series, COn (n = 3-8), have been elucidated via ab initio quantum chemical calculations. The structures of the lowest order of these (3 and 4) are in close agreement with previous calculations and with experimental data. The structures of the higher-order species are elucidated and correlated to the previous structures, showing similarities in structure and reactivity pathways. The reaction energies of the formation of all products are shown to be related. Exothermic pathways of formation often involve a C2v form of CO2, which was shown to be metastable. The newly identified species could be intermediates in atmospheric reactions. The calculated vibrational frequencies and IR intensities may be used to identify these metastable species.
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Affiliation(s)
- Ben M Elliott
- Department of Chemistry and Biochemistry, Utah State University, Logan, Utah 84322-0300, USA
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Tuttle T, Cerkovnik J, Plesnicar B, Cremer D. Hemiortho Esters and Hydrotrioxides as the Primary Products in the Low-Temperature Ozonation of Cyclic Acetals: An Experimental and Theoretical Investigation. J Am Chem Soc 2004; 126:16093-104. [PMID: 15584745 DOI: 10.1021/ja0450511] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
Low-temperature ozonation (-78 degrees C) of 1,3-dioxolanes 1a-1f and 1,3-dioxanes 1g and h in acetone-d6, methyl acetate, and tert-butyl methyl ether produced both the corresponding hemiortho esters (2a-h, ROH) and acetal hydrotrioxides (3a-h, ROOOH) in molar ratios ROH/ROOOH ranging from 0.5 to 23. Both types of intermediates were fully characterized by 1H, 13C, and 17O NMR spectroscopy. DFT calculations suggest that ozone abstracts a hydride ion from 1 to form an ion pair, R+ -OOOH, which subsequently collapses to either the corresponding hemiortho ester (ROH) or the acetal hydrotrioxide (ROOOH). Hemiortho esters decomposed quantitatively into the corresponding hydroxy esters. Experimentally obtained activation parameters for the decomposition of 2a (E(a) = 13.5 +/- 1.0 kcal/mol, log A = 8.3 +/- 1.0) are in accord with a highly oriented transition state involving, according to B3LYP calculations (deltaH(a)(298) = 13.2 kcal/mol), two molecules of water as a bifunctional catalyst. This mechanism is also supported by the magnitude of the solvent isotope effect for the decomposition of 2e, i.e., k(H2O)/k(D2O) = 4.6 +/- 1.2. Besides the hydroxy esters and oxygen (3O2/1O2), dihydrogen trioxide (HOOOH) was formed in the decomposition of most of the acetal hydrotrioxides (ROOOH) investigated. The activation parameters for the decomposition of the hydrotrioxides 3a-e in various solvents were E(a) = 20 +/- 2 kcal/mol, log A = 13.5 +/- 1.5. Several mechanistic possibilities for the decomposition of ROOOH were tested by experiment and theory. The formation of the hydroxy esters and oxygen could be explained by the intramolecular transfer of the proton to form the hydroxy ester. The assistance of water in the decomposition of ROOOH to form the hydroxy esters, either directly or via hemiortho esters, was also investigated. According to DFT calculations, the formation of a hydroxy ester via hemiortho ester is energetically more favorable (deltaH(a)(298) = 14.5 kcal/mol), again due to the catalytic effect of two water molecules. HOOOH generation requires the involvement of water in the decomposition of ROOOH where the direct formation out of ROOOH is energetically preferred. The energy for a reaction between two molecules of water and singlet oxygen (delta1O2) is too high to occur in solution.
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Affiliation(s)
- Tell Tuttle
- Department of Theoretical Chemistry, University of Göteborg, Reutersgatan 2, S-41320, Göteborg, Sweden
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Lesko TM, Colussi AJ, Hoffmann MR. Hydrogen Isotope Effects and Mechanism of Aqueous Ozone and Peroxone Decompositions. J Am Chem Soc 2004; 126:4432-6. [PMID: 15053633 DOI: 10.1021/ja038907v] [Citation(s) in RCA: 34] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
Hydrogen peroxide exalts the reactivity of aqueous ozone by reasons that remain obscure. Should H2O2 enhance free radical production, as it is generally believed, a chain mechanism propagated by (.OH/.O2-) species would account for O3 decomposition rates in neat H2O, HR-O3, and in peroxone (O3 + H2O2) solutions, HPR-O3. We found, however, that: (1) the radical mechanism correctly predicts HR-O3 but vastly overestimates HPR-O3, (2) solvent deuteration experiments preclude radical products from the (O3 + HO2-) reaction. The modest kinetic isotope effect (KIE) we measure in H2O/D2O: HR-O3/DR-O3 = 1.5 +/- 0.3, is compatible with a chain process driven by electron- and/or O-atom transfer processes. But the large KIE found in peroxone: HPR-O3/DPR-O3 = 19.6 +/- 4.0, is due to an elementary (O3 + HO2-) reaction involving H-O2- bond cleavage. Since the KIE for the hypothetical H-atom transfer: O3 + HO2- HO3. +.O2-, would emerge as a KIE1/2 factor in the rates of the ensuing radical chain, the magnitude of the observed KIE must be associated with the hydride transfer reaction that yields a diamagnetic species: O3 + HO2- HO3- + O2. HO3-/H2O3 may be the bactericidal trioxide recently identified in the antibody-catalyzed addition of O2(1Deltag) to H2O.
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Affiliation(s)
- Timothy M Lesko
- W. M. Keck Laboratories, California Institute of Technology, Pasadena, California 91125, USA
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Plesnicar B, Tuttle T, Cerkovnik J, Koller J, Cremer D. Mechanism of formation of hydrogen trioxide (HOOOH) in the ozonation of 1,2-diphenylhydrazine and 1,2-dimethylhydrazine: an experimental and theoretical investigation. J Am Chem Soc 2003; 125:11553-64. [PMID: 13129358 DOI: 10.1021/ja036801u] [Citation(s) in RCA: 46] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Low-temperature (-78 degrees C) ozonation of 1,2-diphenylhydrazine in various oxygen bases as solvents (acetone-d(6), methyl acetate, tert-butyl methyl ether) produced hydrogen trioxide (HOOOH), 1,2-diphenyldiazene, 1,2-diphenyldiazene-N-oxide, and hydrogen peroxide. Ozonation of 1,2-dimethylhydrazine produced besides HOOOH, 1,2-dimethyldiazene, 1,2-dimethyldiazene-N-oxide and hydrogen peroxide, also formic acid and nitromethane. Kinetic and activation parameters for the decomposition of the HOOOH produced in this way, and identified by (1)H, (2)H, and (17)O NMR spectroscopy, are in agreement with our previous proposal that water participates in this reaction as a bifunctional catalyst in a polar decomposition process to produce water and singlet oxygen (O(2), (1)delta(g)). The possibility that hydrogen peroxide is, besides water, also involved in the decomposition of hydrogen trioxide is also considered. The half-life of HOOOH at room temperature (20 degrees C) is 16 +/- 1 min in all solvents investigated. Using a variety of DFT methods (restricted, broken-symmetry unrestricted, self-interaction corrected) in connection with the B3LYP functional, a stepwise mechanism involving the hydrotrioxyl (HOOO(*)) radical is proposed for the ozonation of hydrazines (RNHNHR, R = H, Ph, Me) that involves the abstraction of the N-hydrogen atom by ozone to form a radical pair, RNNHR(*) (*)OOOH. The hydrotrioxyl radical can then either abstract the remaining N(H) hydrogen atom from the RNNHR(*) radical to form the corresponding diazene (RN=NR), or recombines with RNNHR(*) in a solvent cage to form the hydrotrioxide, RN(OOOH)NHR. The decomposition of these very labile hydrotrioxides involves the homolytic scission of the RO-OOH bond with subsequent "in cage" formation of the diazene-N-oxide and hydrogen peroxide. Although 1,2-diphenyldiazene is unreactive toward ozone under conditions investigated, 1,2-dimethyldiazene reacts with relative ease to yield 1,2-dimethyldiazene-N-oxide and singlet oxygen (O(2), (1)delta(g)). The subsequent reaction sequence between these two components to yield nitromethane as the final product is discussed. The formation of formic acid and nitromethane in the ozonolysis of 1,2-dimethylhydrazine is explained as being due to the abstraction of a methyl H atom of the CH(3)NNHCH(3)(*) radical by HOOO(*) in the solvent cage. The possible mechanism of the reaction of the initially formed formaldehyde methylhydrazone (and HOOOH) with ozone/oxygen mixtures to produce formic acid and nitromethane is also discussed.
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Affiliation(s)
- Bozo Plesnicar
- Department of Chemistry, Faculty of Chemistry and Chemical Technology, University of Ljubljana, PO Box 537, 1000 Ljubljana, Slovenia, Sweden.
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Wu A, Cremer D, Gauss J. 17O NMR Chemical Shifts of Polyoxides in Gas Phase and in Solution. J Phys Chem A 2003. [DOI: 10.1021/jp030697l] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Affiliation(s)
- Anan Wu
- Department of Theoretical Chemistry, Göteborg University, Reutersgatan 2, S-41320 Göteborg, Sweden, and Institut für Physikalische Chemie, Universität Mainz, D-55099 Mainz, Germany
| | - Dieter Cremer
- Department of Theoretical Chemistry, Göteborg University, Reutersgatan 2, S-41320 Göteborg, Sweden, and Institut für Physikalische Chemie, Universität Mainz, D-55099 Mainz, Germany
| | - Jürgen Gauss
- Department of Theoretical Chemistry, Göteborg University, Reutersgatan 2, S-41320 Göteborg, Sweden, and Institut für Physikalische Chemie, Universität Mainz, D-55099 Mainz, Germany
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Hendrickx MFA, Vinckier C. 1,3-Cycloaddition of Ozone to Ethylene, Benzene, and Phenol: A Comparative ab Initio Study. J Phys Chem A 2003. [DOI: 10.1021/jp034541x] [Citation(s) in RCA: 35] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Affiliation(s)
- Marc F. A. Hendrickx
- Department of Chemistry, Katholieke Universiteit Leuven, Celestijnenlaan 200F, B-3001 Leuven, Belgium
| | - Chris Vinckier
- Department of Chemistry, Katholieke Universiteit Leuven, Celestijnenlaan 200F, B-3001 Leuven, Belgium
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Wu A, Cremer D, Plesnicar B. The role of the HOOO(-) anion in the ozonation of alcohols: large differences in the gas-phase and in the solution-phase mechanism. J Am Chem Soc 2003; 125:9395-402. [PMID: 12889970 DOI: 10.1021/ja030245m] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Abstract
The mechanism of the ozonation of isopropyl alcohol was investigated for the gas and the solution phase using second-order many body perturbation theory and density functional theory (DFT) with the hybrid functional B3LYP and a 6-311++G(3df,3pd) basis set. A careful analysis of calculated energies (considering thermochemical corrections, solvation energies, BSSE corrections, the self-interaction error of DFT, etc.) reveals that the gas-phase mechanism of the reaction is dominated by radical or biradical intermediates while the solution-phase mechanism is characterized by hydride transfer and the formation of an intermediate ion pair that includes the HOOO(-) anion. The product distribution observed for the ozonation in acetone solution can be explained on the basis of the properties of the HOOO(-) anion. General conclusions for the ozonation of alcohols and the toxicity of ozone (inhaled or administered into the blood) can be drawn.
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Affiliation(s)
- Anan Wu
- Department of Theoretical Chemistry, Göteborg University, Reutersgatan 2, S-413 20 Göteborg, Sweden
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Filatov M, Cremer D. Bonding in the ClOO(2A″) and BrOO(2A″) radical: Nonrelativistic single-reference versus relativistic multi-reference descriptions in density functional theory. Phys Chem Chem Phys 2003. [DOI: 10.1039/b301627g] [Citation(s) in RCA: 19] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
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