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Foscue C, Brown H, Walden K, Hession D, Taylor WS, Provorse Long M. Near-Thermal Reactions of Au +( 1S, 3D) and AuX + with CH 3X (X = Br, I): A Combined Experimental and Computational Analysis. J Phys Chem A 2021; 125:1696-1710. [PMID: 33616399 DOI: 10.1021/acs.jpca.0c11007] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Reactions of Au+(1S,3D) and AuX+ with CH3X (X = I and Br) were performed in the gas phase by utilizing a selected-ion drift cell reactor. These experiments were done at room temperature as well as reduced temperature (∼200 K) at a total pressure of 3.5 Torr in helium. Rate coefficients, product sequencing, and branching fractions were obtained for all reactions to evaluate reaction efficiencies and higher-order processes. Reactions of both Au+ states proceed with moderate efficiencies as compared to the average dipole orientation model with these neutral substrates. Results from this work revealed that, dependent on the reacting partner, Au+(1S) exhibits, among others, halogen abstraction, HX elimination, and association. By comparison, Au+(3D) participates primarily in charge transfer and halogen abstraction. Dependent on the halogen ligand, AuX+ ions induce several processes, including association, charge transfer, halogen loss, and halogen substitution. AuI+ reacting with CH3Br resulted in association exclusively, whereas the AuI+/CH3I and AuBr+/CH3Br systems exhibited halogen loss as the dominant process. By contrast, all possible bimolecular pathways occurred in the reaction of AuBr+ with CH3I. Observed products indicate that displacement of bromine by iodine on gold is favored in ionic products, consistent with the thermochemical preference for formation of the Au+-I bond. All AuX+ reactions proceed at maximum efficiency. Potential energy surfaces calculated at the B3LYP/def2-TZVPP level of theory for the AuX+ reactions are in good agreement with the available thermochemistry for these species and with previously calculated structures and energetics. Experimental and computational results are consistent with a mechanism for the AuX+/CH3Y systems where bimolecular products occur either via direct loss of the halogen originally on Au or via a common intermediate resulting from methyl migration in which the Au center is three-coordinate.
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Affiliation(s)
- Camille Foscue
- Department of Chemistry, University of Central Arkansas, Conway, Arkansas 72035, United States
| | - Hayden Brown
- Department of Chemistry, University of Central Arkansas, Conway, Arkansas 72035, United States
| | - Kathryn Walden
- Department of Chemistry, University of Central Arkansas, Conway, Arkansas 72035, United States
| | - Dayna Hession
- Department of Chemistry, University of Central Arkansas, Conway, Arkansas 72035, United States
| | - William S Taylor
- Department of Chemistry, University of Central Arkansas, Conway, Arkansas 72035, United States
| | - Makenzie Provorse Long
- Department of Chemistry, University of Central Arkansas, Conway, Arkansas 72035, United States
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Eisenstein O, Milani J, Perutz RN. Selectivity of C–H Activation and Competition between C–H and C–F Bond Activation at Fluorocarbons. Chem Rev 2017; 117:8710-8753. [DOI: 10.1021/acs.chemrev.7b00163] [Citation(s) in RCA: 221] [Impact Index Per Article: 31.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Affiliation(s)
- Odile Eisenstein
- Institut
Charles Gerhardt, UMR 5253 CNRS Université Montpellier, cc 1501,
Place E. Bataillon, 34095 Montpellier, France
- Centre
for Theoretical and Computational Chemistry (CTCC), Department of
Chemistry, University of Oslo, P.O. Box 1033, Blindern, 0315 Oslo, Norway
| | - Jessica Milani
- Department
of Chemistry, University of York, York YO10 5DD, United Kingdom
| | - Robin N. Perutz
- Department
of Chemistry, University of York, York YO10 5DD, United Kingdom
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Barrientos C, Rayón VM, Largo A, Sordo JÁ, Redondo P. Kinetics studies of the reactions of main fourth-period monocations (Ga+, Ge+, As+, and Se+) with methyl fluoride. J Phys Chem A 2013; 117:7742-53. [PMID: 23859563 DOI: 10.1021/jp405601y] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
Thermodynamics and kinetics theoretical studies on the gas-phase reactions of fluoromethane with main fourth-period monocations (Ga(+), Ge(+), As(+), and Se(+)) have been carried out. Density functional theory (in particular mPW1K functional) was employed in the description of the potential energy surfaces, and refinement of the energies were done at the CCSD(T) level. The reaction rate constants were estimated using variational/conventional microcanonical transition state theory. From a thermodynamic viewpoint, the fluorine abstraction product is predicted for Ga(+) and Ge(+), whereas for As(+) and Se(+) the elimination product, MCH2(+) (M = As, Se) + HF, is the preferred one. Nevertheless, the most favorable channel for the reactions of CH3F with Ga(+) and Se(+) cations present a net activation barrier. In the case of Ga(+), the reaction proceeds via an addition channel forming the adduct complex, CH3FGa(+), whereas for Se(+) no reaction is found, in agreement with the experiments. The predicted reaction rate constants are in reasonable good agreement with the experimental values available. Apart from the harpoon-like mechanism, our results suggest that an oxidative addition mechanism seems to play a relevant role.
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Affiliation(s)
- Carmen Barrientos
- Departamento de Química Física y Química Inorgánica, Facultad de Ciencias, Universidad de Valladolid, 47011 Valladolid, Spain
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Kim J, Hong K, Kim HK, Lee YS, Kim TK. Strong Spin–Orbit Coupling Facilitates C–H Activation in the Reactions of Os+ with CH3F: Theoretical Investigations. J Chem Theory Comput 2013; 9:1087-92. [DOI: 10.1021/ct301041u] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Affiliation(s)
- Joonghan Kim
- Department of Chemistry, The
Catholic University of Korea, Bucheon, 420-743, Republic of Korea
| | - Kiryong Hong
- Department of Chemistry and
Chemistry Institute of Functional Materials, Pusan National University,
Busan 609-735, Republic of Korea
| | - Hyun Kook Kim
- Department of Chemistry and
Chemistry Institute of Functional Materials, Pusan National University,
Busan 609-735, Republic of Korea
| | - Yoon Sup Lee
- Department of Chemistry, KAIST,
Daejeon 305-701, Republic of Korea
| | - Tae Kyu Kim
- Department of Chemistry and
Chemistry Institute of Functional Materials, Pusan National University,
Busan 609-735, Republic of Korea
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Taylor WS, Abrams ML, Matthews CC, Byers S, Musial S, Nichols CM. State-Specific Reactions of Cu+(1S, 3D) with CH3X and CF3X (X = Cl, Br, I): Exploring the Influence of Dipole Orientation on Association and C–X Bond Activation. J Phys Chem A 2012; 116:3979-88. [DOI: 10.1021/jp300587y] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Affiliation(s)
- William S. Taylor
- Department of Chemistry, University of Central Arkansas, Conway, Arkansas 72035, United States
| | - Micah L. Abrams
- Department of Chemistry, University of Central Arkansas, Conway, Arkansas 72035, United States
| | - Cullen C. Matthews
- Department of Chemistry, University of Central Arkansas, Conway, Arkansas 72035, United States
| | - Seth Byers
- Department of Chemistry, University of Central Arkansas, Conway, Arkansas 72035, United States
| | - Scott Musial
- Department of Chemistry, University of Central Arkansas, Conway, Arkansas 72035, United States
| | - Charles M. Nichols
- Department of Chemistry, University of Central Arkansas, Conway, Arkansas 72035, United States
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Taylor WS, Matthews CC, Hicks AJ, Fancher KG, Chen LC. Near-thermal reactions of Au(+)(1S,3D) with CH3X (X = F,Cl). J Phys Chem A 2012; 116:943-51. [PMID: 22257138 DOI: 10.1021/jp2093912] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Reactions of Au(+)((1)S) and Au(+)((3)D) with CH(3)F and CH(3)Cl have been carried out in a drift cell in He at a pressure of 3.5 Torr at both room temperature and reduced temperatures in order to explore the influence of the electronic state of the metal on reaction outcomes. State-specific product channels and overall two-body rate constants were identified using electronic state chromatography. These results indicate that Au(+)((1)S) reacts to yield an association product in addition to AuCH(2)(+) in parallel steps with both neutrals. Product distributions for association vs HX elimination were determined to be 79% association/21% HX elimination for X = F and 50% association/50% HX elimination when X = Cl. Reaction of Au(+)((3)D) with CH(3)F also results in HF elimination, which in this case is thought to produce (3)AuCH(2)(+). With CH(3)Cl, Au(+)((3)D) reacts to form AuCH(3)(+) and CH(3)Cl(+) in parallel steps. An additional product channel initiated by Au(+)((3)D) is also observed with both methyl halides, which yields CH(2)X(+) as a higher-order product. Kinetic measurements indicate that the reaction efficiency for both Au(+) states is significantly greater with CH(3)Cl than with CH(3)F. The observed two-body rate constant for depletion of Au(+)((1)S) by CH(3)F represents less than 5% of the limiting rate constant predicted by the average dipole orientation model (ADO) at room temperature and 226 K, whereas CH(3)Cl reacts with Au(+)((1)S) at the ADO limit at both room temperature and 218 K. Rate constants for depletion of Au(+)((3)D) by CH(3)F and CH(3)Cl were measured at 226 and 218 K respectively, and indicate that Au(+)((3)D) is consumed at approximately 2% of the ADO limit by CH(3)F and 69% of the ADO limit by CH(3)Cl. Product formation and overall efficiency for all four reactions are consistent with previous experimental results and available theoretical models.
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Affiliation(s)
- William S Taylor
- Department of Chemistry, University of Central Arkansas, Conway, Arkansas 72035, United States.
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Méndez O, Colmenares F. Theoretical Study of the Reactions M++CH3F (M=Ge, As, Se, Sb). Chemphyschem 2010; 11:1909-17. [DOI: 10.1002/cphc.201000046] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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Li TH, Xie XG. A DFT study on the mechanisms for gas phase reaction of yttrium with propene. J PHYS ORG CHEM 2010. [DOI: 10.1002/poc.1655] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
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Li TH, Wang CM, Yu SW, Liu XY, Fu H, Xie XG. A DFT study on the mechanism of the gas phase reaction of ground-state Y (4d15s2,2D) with 2-butyne. ACTA ACUST UNITED AC 2009. [DOI: 10.1016/j.theochem.2009.08.025] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Theoretical determination of the favorable mechanism of the reaction between AlX and HX (X = Br, Cl, and F). OPEN CHEM 2009. [DOI: 10.2478/s11532-009-0026-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
AbstractThe reaction mechanism between AlX and HX (X = Br, Cl, and F) have been characterized in detail using DFT as well as the ab initio method. The reaction yielding AlX3 and molecular hydrogen was calculated to be highly exothermic. The present calculations also show that the possible routes to the trihalides species start more favorable with the primary insertion product AlX2H than with the biadduct AlX(HX)2 one.
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Mechanisms for H2 and CH3 elimination in the gas phase reaction of propyne with Zr: A DFT study. Chem Phys Lett 2009. [DOI: 10.1016/j.cplett.2009.05.014] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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12
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Bernabé E, Méndez O, Colmenares F. Theoretical study on the oxidative addition of methyl fluoride to Ru+. Chem Phys Lett 2009. [DOI: 10.1016/j.cplett.2009.05.038] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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13
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Li X, Deng S, Fu H, Li T. Adsorption and inhibition effect of 6-benzylaminopurine on cold rolled steel in 1.0M HCl. Electrochim Acta 2009. [DOI: 10.1016/j.electacta.2009.02.084] [Citation(s) in RCA: 240] [Impact Index Per Article: 16.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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