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Safiullin RL, Chainikova EM, Teregulova AN, Khursan SL. Reactivity of Arylnitroso Oxide Isomers with Benzoquinones. KINETICS AND CATALYSIS 2021. [DOI: 10.1134/s0023158421030071] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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2
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Formation of 1,2,4-oxadiazoles in the course of photooxidation of aromatic azides in acetonitrile. MENDELEEV COMMUNICATIONS 2021. [DOI: 10.1016/j.mencom.2021.03.029] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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3
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Chapyshev SV, Korchagin DV, Misochko EY. Recent advances in chemistry of high-spin nitrenes. RUSSIAN CHEMICAL REVIEWS 2021. [DOI: 10.1070/rcr4965] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
Experimental and theoretical studies on aromatic nitrenes bearing from three to six unpaired electrons and having quartet, quintet, sextet or septet ground spin states, published in the last 15 years are analyzed. A comparative analysis of the magnetic properties of high-spin nitrenes and all other known high-spin organic molecules is performed. Promising areas of practical application of high-spin nitrenes as molecular magnets and as qubits and qudits for quantum computations are discussed.
The bibliography includes 214 references.
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4
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Bhagat V, Schumann J, Bettinger HF. Unusual Nitrene Oxidation Product Formation by Metathesis Involving the Dioxygen O-O and Borylnitrene B-N Bonds. Chemistry 2020; 26:12654-12663. [PMID: 32902001 PMCID: PMC7590100 DOI: 10.1002/chem.202002445] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2020] [Revised: 06/11/2020] [Indexed: 01/08/2023]
Abstract
The reaction of dioxygen with nitrenes can have significant energy barriers, although both reactants are triplet diradicals and the formation of nitroso-O-oxides is spin-allowed. By means of matrix-isolation infrared spectroscopy in solid argon, nitrogen, and neon, and through high-level computational quantum chemistry, it is shown herein that a 3-nitreno-1,3,2-benzodioxaborole CatBN (Cat=catecholato) reacts with dioxygen under cryogenic conditions thermally at temperatures as low as 7 K to produce two distinct products, an anti-nitroso-O-oxide and a nitritoborane CatBONO. The computed barriers for the formation of nitroso-O-oxide isomers are very low. Whereas anti-nitroso-O-oxide is kinetically trapped, its bisected isomer has a very low barrier for metathesis, yielding the CatBO+NO radicals in a strongly exothermic reaction; these radicals can combine under matrix-isolation conditions to give nitritoborane CatBONO. The trapped isomer, anti-nitroso-O-oxide, can form the nitritoborane CatBONO only after photoexcitation, possibly involving isomerization to the bisected isomer of anti-nitroso-O-oxide.
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Affiliation(s)
- Virinder Bhagat
- Institut für Organische ChemieUniversität TübingenAuf der Morgenstelle 1872076TübingenGermany
| | - Julia Schumann
- Institut für Organische ChemieUniversität TübingenAuf der Morgenstelle 1872076TübingenGermany
| | - Holger F. Bettinger
- Institut für Organische ChemieUniversität TübingenAuf der Morgenstelle 1872076TübingenGermany
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5
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Chainikova EM, Khursan SL, Yusupova AR, Teregulova AN, Abdullin MF, Lobov AN, Safiullin RL. Ortho-Cyclization in Asymmetrically Substituted Arylnitroso Oxides. J Org Chem 2020; 85:10813-10822. [PMID: 32692173 DOI: 10.1021/acs.joc.0c01314] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The mechanism of the photooxidation of a number of asymmetrically substituted phenyl azides in acetonitrile was studied. The key intermediates of this reaction are the corresponding nitroso oxides, the unimolecular consumption of which occurs via the cis form when the terminal oxygen atom of the NOO moiety reacts with the ortho position of the aromatic ring. As a result, it is opened to form a nitrile oxide. In the case of 3-methylphenyl azide, the reaction proceeds via the cis/syn form of nitroso oxide with a regioselectivity of 91%. The methoxy substituent at the para position changes the direction of the ortho-cyclization so that it occurs via the cis/anti form of nitroso oxide independently on the nature of a meta substituent. Nitrile oxides, which are formed as a result of these transformations of nitroso oxides, are stabilized by [3 + 2] cycloaddition with acetonitrile to give 1,2,4-oxadiazoles. The observed regioselectivity of the ortho-cyclization of nitroso oxides was explained using theoretical methods. Its cause consists in the extra-stabilization of the transition state of the reaction of the cis/anti form due to a stereoelectronic effect of the para-methoxy substituent.
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Affiliation(s)
- Ekaterina M Chainikova
- Ufa Institute of Chemistry, Ufa Federal Research Center of the Russian Academy of Sciences, 71 pr. Oktyabrya, Ufa 450054, Russian Federation
| | - Sergey L Khursan
- Ufa Institute of Chemistry, Ufa Federal Research Center of the Russian Academy of Sciences, 71 pr. Oktyabrya, Ufa 450054, Russian Federation
| | - Alfia R Yusupova
- Ufa Institute of Chemistry, Ufa Federal Research Center of the Russian Academy of Sciences, 71 pr. Oktyabrya, Ufa 450054, Russian Federation
| | - Aigul N Teregulova
- Ufa Institute of Chemistry, Ufa Federal Research Center of the Russian Academy of Sciences, 71 pr. Oktyabrya, Ufa 450054, Russian Federation
| | - Marat F Abdullin
- Ufa Institute of Chemistry, Ufa Federal Research Center of the Russian Academy of Sciences, 71 pr. Oktyabrya, Ufa 450054, Russian Federation
| | - Alexander N Lobov
- Ufa Institute of Chemistry, Ufa Federal Research Center of the Russian Academy of Sciences, 71 pr. Oktyabrya, Ufa 450054, Russian Federation
| | - Rustam L Safiullin
- Ufa Institute of Chemistry, Ufa Federal Research Center of the Russian Academy of Sciences, 71 pr. Oktyabrya, Ufa 450054, Russian Federation
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Schleif T, Mieres-Perez J, Henkel S, Mendez-Vega E, Inui H, McMahon RJ, Sander W. Conformer-Specific Heavy-Atom Tunneling in the Rearrangement of Benzazirines to Ketenimines. J Org Chem 2019; 84:16013-16018. [PMID: 31730349 DOI: 10.1021/acs.joc.9b02482] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
5-Methoxy-2H-benzazirine was prepared via irradiation of the corresponding phenyl azide, isolated in an argon matrix at cryogenic temperatures. It undergoes ring expansion to the corresponding ketenimine in the dark at T < 30 K despite a calculated activation barrier of 4.9 kcal mol-1 [B3LYP/6-311++G(d,p)]. Since this rearrangement proceeds with a rate constant in the order of 10-4 s-1, exhibiting only a shallow temperature dependence, the results are interpreted in terms of heavy-atom tunneling. Of the four isomeric benzazirines resulting from the initial photolysis, only one can be observed to rearrange; this conformer specificity is explained by the other potentially observable rearrangements being either too fast or too slow to be detected due to the differences in heights and widths of their respective activation barriers.
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Affiliation(s)
- Tim Schleif
- Lehrstuhl für Organische Chemie II , Ruhr-Universität Bochum , 44801 Bochum , Germany
| | - Joel Mieres-Perez
- Lehrstuhl für Organische Chemie II , Ruhr-Universität Bochum , 44801 Bochum , Germany
| | - Stefan Henkel
- Lehrstuhl für Organische Chemie II , Ruhr-Universität Bochum , 44801 Bochum , Germany
| | - Enrique Mendez-Vega
- Lehrstuhl für Organische Chemie II , Ruhr-Universität Bochum , 44801 Bochum , Germany
| | - Hiroshi Inui
- Department of Chemistry, School of Science , Kitasato University , 1-15-1 Kitasato, Minami-ku , Sagamihara , Kanagawa 252-0373 , Japan
| | - Robert J McMahon
- Department of Chemistry , University of Wisconsin-Madison , 1101 University Avenue , Madison , Wisconsin 53706-1322 , United States
| | - Wolfram Sander
- Lehrstuhl für Organische Chemie II , Ruhr-Universität Bochum , 44801 Bochum , Germany
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7
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Yarullin AR, Ovchinnikov MY, Khursan SL, Chainikova EM, Safiullin RL. The substituent effects on the [3+2] cycloaddition of nitrile oxides generated by photooxidation of arylazides to acetonitrile. J Mol Graph Model 2019; 95:107491. [PMID: 31757588 DOI: 10.1016/j.jmgm.2019.107491] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/14/2019] [Revised: 10/17/2019] [Accepted: 11/12/2019] [Indexed: 11/16/2022]
Abstract
The DFT approach in M06L/6-311 + G(d,p) approximation was used to study the transformation of unsaturated nitrile oxides (RCNO), which were generated by photooxidation of the corresponding aromatic azide, to oxadiazoles via [3 + 2]cyclization with acetonitrile. It was found that the cycloaddition activation enthalpy was within 60-93 kJ/mol, depending on the structure of the nitrile oxide. A significant mesomeric effect of the substituent and its position in the conjugated molecular system on the activation barrier of the reaction studied was identified. The relationship between the thermodynamic characteristics of [3 + 2] cycloaddition and electron density distribution in RCNO was demonstrated by a representative set of compounds including mono- and disubstituted nitrile oxides.
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Affiliation(s)
- Aidar R Yarullin
- Ufa Institute of Chemistry of the Russian Academy of Sciences, Ufa Federal Scientific Center, 71 prosp. Oktyabrya, 450054, Ufa, Russian Federation
| | - Mikhail Yu Ovchinnikov
- Ufa Institute of Chemistry of the Russian Academy of Sciences, Ufa Federal Scientific Center, 71 prosp. Oktyabrya, 450054, Ufa, Russian Federation
| | - Sergey L Khursan
- Ufa Institute of Chemistry of the Russian Academy of Sciences, Ufa Federal Scientific Center, 71 prosp. Oktyabrya, 450054, Ufa, Russian Federation.
| | - Ekaterina M Chainikova
- Ufa Institute of Chemistry of the Russian Academy of Sciences, Ufa Federal Scientific Center, 71 prosp. Oktyabrya, 450054, Ufa, Russian Federation
| | - Rustam L Safiullin
- Ufa Institute of Chemistry of the Russian Academy of Sciences, Ufa Federal Scientific Center, 71 prosp. Oktyabrya, 450054, Ufa, Russian Federation
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8
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Affiliation(s)
- Ashim Nandi
- Department of Chemistry Ben-Gurion University of the Negev Beer-Sheva 841051 Israel
| | - Sebastian Kozuch
- Department of Chemistry Ben-Gurion University of the Negev Beer-Sheva 841051 Israel
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9
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10
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Mendez-Vega E, Mieres-Perez J, Chapyshev SV, Sander W. Persistent Organic High-Spin Trinitrenes. Angew Chem Int Ed Engl 2019; 58:12994-12998. [PMID: 31265166 PMCID: PMC7687127 DOI: 10.1002/anie.201904556] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2019] [Indexed: 11/15/2022]
Abstract
The septet ground state trinitrenes 1,3,5‐trichloro‐2,4,6‐trinitrenobenzene and 1,3,5‐tribromo‐2,4,6‐trinitrenobenzene were isolated in inert (Ar, Ne, and Xe) as well as reactive matrices (H2, O2, and H2O) at cryogenic temperatures. These trinitrenes were obtained in high yields by UV photolysis of the corresponding triazides and characterized by IR and UV/Vis spectroscopy. The trinitrenes, despite bearing six unpaired electrons, are remarkably unreactive towards molecular oxygen and hydrogen and are persistent in water ice up to 160 K where the water matrix starts to sublime off.
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Affiliation(s)
- Enrique Mendez-Vega
- Lehrstuhl für Organische Chemie II, Ruhr-Universität Bochum, 44780, Bochum, Germany
| | - Joel Mieres-Perez
- Lehrstuhl für Organische Chemie II, Ruhr-Universität Bochum, 44780, Bochum, Germany
| | - Sergei V Chapyshev
- Institute of Problems of Chemical Physics, Russian Academy of Sciences, 142432, Chernogolovka, Moscow Region, Russia
| | - Wolfram Sander
- Lehrstuhl für Organische Chemie II, Ruhr-Universität Bochum, 44780, Bochum, Germany
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11
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Nunes CM, Eckhardt AK, Reva I, Fausto R, Schreiner PR. Competitive Nitrogen versus Carbon Tunneling. J Am Chem Soc 2019; 141:14340-14348. [DOI: 10.1021/jacs.9b06869] [Citation(s) in RCA: 33] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Cláudio M. Nunes
- CQC, Department of Chemistry, University of Coimbra, 3004-535 Coimbra, Portugal
| | - André K. Eckhardt
- Institute of Organic Chemistry, Justus Liebig University, Heinrich-Buff-Ring 17, 35392 Giessen, Germany
| | - Igor Reva
- CQC, Department of Chemistry, University of Coimbra, 3004-535 Coimbra, Portugal
| | - Rui Fausto
- CQC, Department of Chemistry, University of Coimbra, 3004-535 Coimbra, Portugal
| | - Peter R. Schreiner
- Institute of Organic Chemistry, Justus Liebig University, Heinrich-Buff-Ring 17, 35392 Giessen, Germany
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12
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Nunes CM, Reva I, Kozuch S, McMahon RJ, Fausto R. Photochemistry of 2-Formylphenylnitrene: A Doorway to Heavy-Atom Tunneling of a Benzazirine to a Cyclic Ketenimine. J Am Chem Soc 2017; 139:17649-17659. [DOI: 10.1021/jacs.7b10495] [Citation(s) in RCA: 30] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Affiliation(s)
- Cláudio M. Nunes
- CQC, Department
of Chemistry, University of Coimbra, 3004-535 Coimbra, Portugal
| | - Igor Reva
- CQC, Department
of Chemistry, University of Coimbra, 3004-535 Coimbra, Portugal
| | - Sebastian Kozuch
- Department of Chemistry, Ben-Gurion University of the Negev, Beer-Sheva 841051, Israel
| | - Robert J. McMahon
- Department of Chemistry, University of Wisconsin-Madison, Madison, Wisconsin 53706-1322, United States
| | - Rui Fausto
- CQC, Department
of Chemistry, University of Coimbra, 3004-535 Coimbra, Portugal
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13
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Chainikova EM, Yusupova AR, Khursan SL, Teregulova AN, Lobov AN, Abdullin MF, Enikeeva LV, Gubaydullin IM, Safiullin RL. Interplay of Conformational and Chemical Transformations of Ortho-Substituted Aromatic Nitroso Oxides: Experimental and Theoretical Study. J Org Chem 2017; 82:7750-7763. [PMID: 28695737 DOI: 10.1021/acs.joc.7b00537] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The mechanism of the photooxidation of aromatic azides containing a substituent at one of the ortho positions (2,4-dimethoxyphenyl azide (1a) and 2-methyl-4-[(2E)-1-methylbut-2-en-1-yl]phenyl azide (1b)) was studied in acetonitrile. The electronic spectra and the kinetic regularities of the consumption of corresponding nitroso oxides, which are the reaction intermediates, were investigated by flash photolysis. Owing to the one-and-a-half order of the C-N and N-O bonds and asymmetric molecule structure these nitroso oxides exist as four conformers (cis/syn, cis/anti, trans/syn, and trans/anti). The conformers differ in the spectral properties and in the reactivity in various irreversible transformations. The only product, (2Z,4E)-4-methoxy-6-oxohepta-2,4-dienenitrile oxide (7a), was observed during photooxidation of 1a, whereas transformations of the nitroso oxide isomers derived from 1b led to a set of stable products: the cis/anti isomer was transformed into (3,4,7-trimethyl-3a,4-dihydro-2,1-benzisoxazol-5(3H)-ylidene)ethanal (10), the trans isomers recombined forming the corresponding nitro and nitroso compounds, and the most reactive cis/syn isomer was transformed into ortho-nitrosobenzyl alcohol 11. The last was oxidized slowly to the corresponding benzaldehyde 12. Interaction of 11 and 12 led to the formation of (Z)-1,2-bis(2-formyl-4-((2E)-1-methylbut-2-en-1-yl)phenyl)diazene-1-oxide (13). The DFT simulation and kinetic modeling of the nitroso oxide transformations as well as the product analysis allowed revealing the fine details of the mechanism of decay for these species.
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Affiliation(s)
- Ekaterina M Chainikova
- Ufa Institute of Chemistry of the Russian Academy of Sciences , 71 pr. Oktyabrya, Ufa 450054, Russian Federation
| | - Alfia R Yusupova
- Ufa Institute of Chemistry of the Russian Academy of Sciences , 71 pr. Oktyabrya, Ufa 450054, Russian Federation
| | - Sergey L Khursan
- Ufa Institute of Chemistry of the Russian Academy of Sciences , 71 pr. Oktyabrya, Ufa 450054, Russian Federation
| | - Aigul N Teregulova
- Ufa Institute of Chemistry of the Russian Academy of Sciences , 71 pr. Oktyabrya, Ufa 450054, Russian Federation
| | - Alexander N Lobov
- Ufa Institute of Chemistry of the Russian Academy of Sciences , 71 pr. Oktyabrya, Ufa 450054, Russian Federation
| | - Marat F Abdullin
- Ufa Institute of Chemistry of the Russian Academy of Sciences , 71 pr. Oktyabrya, Ufa 450054, Russian Federation
| | - Leniza V Enikeeva
- Ufa State Petroleum Technological University , 1 Kosmonavtov Street, Ufa 450062, Russian Federation
| | - Irek M Gubaydullin
- Ufa State Petroleum Technological University , 1 Kosmonavtov Street, Ufa 450062, Russian Federation
| | - Rustam L Safiullin
- Ufa Institute of Chemistry of the Russian Academy of Sciences , 71 pr. Oktyabrya, Ufa 450054, Russian Federation
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Mardyukov A, Niedek D, Schreiner PR. Preparation and Characterization of Parent Phenylphosphinidene and Its Oxidation to Phenyldioxophosphorane: The Elusive Phosphorus Analogue of Nitrobenzene. J Am Chem Soc 2017; 139:5019-5022. [DOI: 10.1021/jacs.7b01639] [Citation(s) in RCA: 39] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Affiliation(s)
- Artur Mardyukov
- Institute of Organic Chemistry, Justus-Liebig University, Heinrich-Buff-Ring 17, 35392 Giessen, Germany
| | - Dominik Niedek
- Institute of Organic Chemistry, Justus-Liebig University, Heinrich-Buff-Ring 17, 35392 Giessen, Germany
| | - Peter R. Schreiner
- Institute of Organic Chemistry, Justus-Liebig University, Heinrich-Buff-Ring 17, 35392 Giessen, Germany
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15
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Yusupova AR, Safiullin RL, Khursan SL. Conformational Transformations in Aromatic Nitroso Oxides. J Phys Chem A 2016; 120:5693-705. [PMID: 27356269 DOI: 10.1021/acs.jpca.6b04282] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
A systematic theoretical study on conformational transformations of monosubstituted (ortho- and para-) aromatic nitroso oxides R-C6H4NOO was performed. The existence of two rotation axes enables two types of conformational transitions in substituted arylnitroso oxides: trans/cis (rotation around the N-O bond) and syn/anti (rotation around the C-N bond, which is important in ortho isomers). The complete set of conformers was localized for R-C6H4NOO using four selected density functional (M06-L, mPWPW91, OLYP, and HCTH) and augmented polarization basis set of triple splitting. It was found that the activation enthalpy of the trans-cis conformational transition is nearly insensitive to the nature of R and ranges within 58-60 kJ/mol for para isomers. The ortho substituent has an insignificant effect on ΔH(≠)trans→cis: it increases this value by ∼5 kJ/mol in syn isomers and decreases it by ∼3 kJ/mol in anti isomers. On the contrary, the syn-anti conformational barrier is considerably affected by the substituent R; an increase in the electron-withdrawing properties of R decreases ΔH(≠)syn→anti. The activation enthalpies grow with increasing polarity of the solvent, as it was found using IEFPCM calculation. The values of relaxation time for all conformational equilibria were calculated and compared with known lifetimes of aromatic nitroso oxides. Our results suggest that syn/anti transitions occur fast enough in the scale of the experimental lifetime. However, trans/cis transformations proceed more slowly. And under certain conditions discussed in the paper, the rate of this conformational transition limits that of irreversible decay of nitroso oxide.
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Affiliation(s)
- Alfia R Yusupova
- Ufa Institute of Chemistry of the Russian Academy of Sciences , 71 pr. Oktyabrya, Ufa 450054, Russian Federation
| | - Rustam L Safiullin
- Ufa Institute of Chemistry of the Russian Academy of Sciences , 71 pr. Oktyabrya, Ufa 450054, Russian Federation
| | - Sergey L Khursan
- Ufa Institute of Chemistry of the Russian Academy of Sciences , 71 pr. Oktyabrya, Ufa 450054, Russian Federation
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16
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Mieres-Pérez J, Mendez-Vega E, Velappan K, Sander W. Reaction of Triplet Phenylnitrene with Molecular Oxygen. J Org Chem 2015; 80:11926-31. [DOI: 10.1021/acs.joc.5b01263] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Joel Mieres-Pérez
- Lehrstuhl
für Organische
Chemie II, Ruhr-Universität Bochum, D-44780 Bochum, Germany
| | - Enrique Mendez-Vega
- Lehrstuhl
für Organische
Chemie II, Ruhr-Universität Bochum, D-44780 Bochum, Germany
| | - Kavitha Velappan
- Lehrstuhl
für Organische
Chemie II, Ruhr-Universität Bochum, D-44780 Bochum, Germany
| | - Wolfram Sander
- Lehrstuhl
für Organische
Chemie II, Ruhr-Universität Bochum, D-44780 Bochum, Germany
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17
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Khursan VS, Shamukaev VA, Chainikova EM, Khursan SL, Safiullin RL. Kinetics and mechanism of the nitrosobenzene deoxygenation by trivalent phosphorous compounds. Russ Chem Bull 2014. [DOI: 10.1007/s11172-013-0359-8] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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18
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Inui H, Sawada K, Oishi S, Ushida K, McMahon RJ. Aryl Nitrene Rearrangements: Spectroscopic Observation of a Benzazirine and Its Ring Expansion to a Ketenimine by Heavy-Atom Tunneling. J Am Chem Soc 2013; 135:10246-9. [DOI: 10.1021/ja404172s] [Citation(s) in RCA: 53] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Hiroshi Inui
- Department of Chemistry, School
of Science, Kitasato University, 1-15-1
Kitasato, Minami-ku, Sagamihara, Kanagawa 252-0373, Japan
- Department of Chemistry, University of Wisconsin-Madison, 1101 University Avenue,
Madison, Wisconsin 53706-1322, United States
| | - Kazuhiro Sawada
- Department of Chemistry, School
of Science, Kitasato University, 1-15-1
Kitasato, Minami-ku, Sagamihara, Kanagawa 252-0373, Japan
| | - Shigero Oishi
- Department of Chemistry, School
of Science, Kitasato University, 1-15-1
Kitasato, Minami-ku, Sagamihara, Kanagawa 252-0373, Japan
| | - Kiminori Ushida
- Department of Chemistry, School
of Science, Kitasato University, 1-15-1
Kitasato, Minami-ku, Sagamihara, Kanagawa 252-0373, Japan
| | - Robert J. McMahon
- Department of Chemistry, University of Wisconsin-Madison, 1101 University Avenue,
Madison, Wisconsin 53706-1322, United States
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19
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Chainikova EM, Pankratyev EY, Teregulova AN, Gataullin RR, Safiullin RL. Thermal intramolecular transformation of key intermediates in the photooxidation of para-allyl-substituted phenyl azide. J Phys Chem A 2013; 117:2728-37. [PMID: 23473334 DOI: 10.1021/jp401038g] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
The electronic spectra, kinetic regularities, and the mechanism of decay of the cis and trans isomeric forms of 4-[(2E)-1-methylbut-2-en-1-yl]phenylnitroso oxide (2) were studied by flash photolysis and product analysis. The mechanism of the consumption of this nitroso oxide is the same as the one proposed earlier for 4-methoxyphenylnitroso oxide. The trans-2 isomer is converted into cis-2, which undergoes cyclization to the substituted benzo[d][1,2,3]dioxazole 3. The reopening of the dioxazole ring yields nitrile oxide 4. The final product (3,4-dimethyl-3a,4-dihydro-2,1-benzisoxazol-5(3H)-ylidene)acetaldehyde (5) is formed by the intramolecular [3 + 2]-cycloaddition of the nitrile oxide group of 4 to the allylic double bond. To support the proposed mechanism, the quantum chemical calculations have been employed.
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Affiliation(s)
- Ekaterina M Chainikova
- Institute of Organic Chemistry, Ufa Scientific Center, The Russian Academy of Sciences, 71 prosp. Oktyabrya, 450054 Ufa, Russian Federation.
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20
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Chainikova EM, Safiullin RL, Spirikhin LV, Abdullin MF. A revised mechanism of thermal decay of arylnitroso oxides. J Phys Chem A 2012; 116:8142-7. [PMID: 22803653 DOI: 10.1021/jp301699p] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
The electronic spectra were measured and the unimolecular decay kinetics of the isomeric forms (cis and trans) of 4-methoxyphenylnitroso oxide in acetonitrile, benzene, and hexane was studied using flash photolysis. The cis form absorbed in a shorter wavelength region and was more labile than the trans form. The difference between the reactivity of the two species increased on going from hexane to acetonitrile. The temperature dependences of reaction rate constants were studied for both isomeric forms. The analysis of products of flash photolysis of 4-methoxyphenyl azide in the presence of oxygen allowed for understanding the mechanism of thermal decay of nitroso oxides. It was shown that the trans nitroso oxide is converted into cis nitroso oxide. The latter undergoes an unusual ring cleavage reaction to form 4-methoxy-6-oxohexa-2,4-dienenitrile N-oxide derivative. We conclude that the nitro- and nitrosobenzenes, which are the main products of the steady-state photolysis of aromatic azides in the presence of oxygen, are formed by the photochemical transformation of the nitroso oxides.
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Affiliation(s)
- Ekaterina M Chainikova
- Institution of the Russian Academy of Sciences Institute of Organic Chemistry, Ufa Scientific Center of the Russian Academy of Sciences, 71 prosp. Oktyabrya, 450054 Ufa, Russian Federation.
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Talipov MR, Khursan SL, Safiullin RL. The reaction of nitroso oxides with olefins: Concerted or nonconcerted addition? RUSSIAN JOURNAL OF PHYSICAL CHEMISTRY A 2011. [DOI: 10.1134/s0036024411030290] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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Khursan VS, Kovaleva OA, Chainikova EM, Talipov MR, Safiullin RL. A flash photolysis and theoretical study of the reaction of arylnitroso oxides with phosphorus(III) compounds. HIGH ENERGY CHEMISTRY 2010. [DOI: 10.1134/s0018143910040053] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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Zeng X, Beckers H, Willner H, Neuhaus P, Grote D, Sander W. Difluorophosphoryl Nitrene F2P(O)N: Matrix Isolation and Unexpected Rearrangement to F2PNO. Chemistry 2009; 15:13466-73. [DOI: 10.1002/chem.200901973] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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Khursan VS, Chainikova EM, Safiullin RL. Flash photolysis study of the reactivity of isomeric forms of arylnitroso oxides toward triphenyl phosphite. HIGH ENERGY CHEMISTRY 2009. [DOI: 10.1134/s0018143909060095] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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Talipov MR, Khursan SL, Safiullin RL. The quantum-chemical modeling of the reaction of nitroso oxides with olefins. RUSSIAN JOURNAL OF PHYSICAL CHEMISTRY B 2009. [DOI: 10.1134/s1990793109040022] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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Chainikova EM, Safiullin RL. Reactivity of arylnitroso oxides to triphenylphosphine. KINETICS AND CATALYSIS 2009. [DOI: 10.1134/s0023158409040089] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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Chainikova EM, Safiullin RL. Chain processes in the reduction of aromatic nitroso compounds by triphenylphosphine in the presence of oxygen. Russ Chem Bull 2009. [DOI: 10.1007/s11172-009-0116-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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Chainikova EM, Safiullin RL, Faizrakhmanova IM, Galkin EG. Reactions of arylnitroso oxides with substituted styrenes: Kinetics and products. KINETICS AND CATALYSIS 2009. [DOI: 10.1134/s0023158409020050] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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Chainikova EM, Safiullin RL. Kinetics of reactions between arylnitroso oxides and methyl vinyl ketone. KINETICS AND CATALYSIS 2009. [DOI: 10.1134/s0023158409010133] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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Gritsan NP. Study of photochemical transformations of organic azides by matrix isolation techniques and quantum chemistry. RUSSIAN CHEMICAL REVIEWS 2008. [DOI: 10.1070/rc2007v076n12abeh003702] [Citation(s) in RCA: 59] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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Qi SF, Yang ZZ. Modeling Mechanisms of Unusual Benzene Imine N6 Adduct Formation in Carcinogenic Reactions of Arylnitrenium Ions with Adenosine. J Org Chem 2007; 72:10058-64. [DOI: 10.1021/jo701980y] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Affiliation(s)
- Shi-Fei Qi
- Chemistry and Chemical Engineering Faculty, Liaoning Normal University, Dalian 116029, People's Republic of China
| | - Zhong-Zhi Yang
- Chemistry and Chemical Engineering Faculty, Liaoning Normal University, Dalian 116029, People's Republic of China
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Yang ZZ, Qi SF. Mechanism of Direct Conversion between C8 Adducts and N7 Adducts in Carcinogenic Reactions of Arylnitrenium Ions with Purine Nucleosides: A Theoretical Study. J Phys Chem B 2007; 111:13444-50. [DOI: 10.1021/jp0765143] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Zhong-Zhi Yang
- Chemistry and Chemical Engineering Faculty, Liaoning Normal University, Dalian 116029, P. R. China
| | - Shi-Fei Qi
- Chemistry and Chemical Engineering Faculty, Liaoning Normal University, Dalian 116029, P. R. China
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Wang J, Burdzinski G, Zhu Z, Platz MS, Carra C, Bally T. Ultrafast Spectroscopic and Matrix Isolation Studies of p-Biphenylyl, o-Biphenylyl, and 1-Naphthylnitrenium Cations. J Am Chem Soc 2007; 129:8380-8. [PMID: 17567009 DOI: 10.1021/ja071325j] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
p-biphenylyl, o-biphenylyl, and 1-naphthyl azides were deposited in argon at low temperature in the presence and absence of HCl. In the absence of HCl, the known electronic and vibrational spectra of the corresponding triplet nitrenes, azirines, and didehydroazepines were observed, whereas in the presence of HCl, photolysis of these azides produces new electronic spectra assigned to the corresponding nitrenium cations. For p-biphenylyl azide the resulting spectrum of the nitrenium ion is very similar to the previously observed solution-phase spectrum of this species. The vibrational spectrum of this cation was recorded for the first time. Spectroscopic evidence for the previously unknown o-biphenylylnitrenium cation and 1-naphthylnitrenium cation are provided. The spectra of p- and o-biphenylylnitrenium cations and 1-naphthylnitrenium cation are well reproduced by CASSCF and CASPT2 calculations. The same nitrenium cations were detected in solution by femtosecond time-resolved laser flash photolysis of the appropriate azides in 88% formic acid. The transient spectra of the nitrenium cations recorded in solution are in good agreement with the spectra obtained in HCl matrices. The rates of formation of these cations equal the rates of decay of the singlet nitrenes in 88% formic acid and are as follows: p-biphenylyl (taugrowth = 11.5 ps), o-biphenylyl (taugrowth = 7.7 ps), and 1-naphthylnitrenium cations (taugrowth = 8.4 ps). The decay lifetimes of p- and o-biphenylylnitrenium cations are 50 and 27 ns, respectively. The decay lifetimes of 1-naphthylnitrenium cation is 860 ps in 88% formic acid.
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Affiliation(s)
- Jin Wang
- Department of Chemistry, The Ohio State University, Columbus, OH 43210, USA
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Gritsan NP, Platz MS. Kinetics, Spectroscopy, and Computational Chemistry of Arylnitrenes. Chem Rev 2006; 106:3844-67. [PMID: 16967923 DOI: 10.1021/cr040055+] [Citation(s) in RCA: 159] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- N P Gritsan
- Institute of Chemical Kinetics and Combustion and Novosibirsk State University, 630090 Novosibirsk, Russian Federation
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