1
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Bigham NP, Novorolsky RJ, Davis KR, Zou H, MacMillan SN, Stevenson MJ, Robertson GS, Wilson JJ. Supramolecular delivery of dinuclear ruthenium and osmium MCU inhibitors. Inorg Chem Front 2024; 11:5064-5079. [PMID: 39113903 PMCID: PMC11301636 DOI: 10.1039/d4qi01102c] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2024] [Accepted: 07/03/2024] [Indexed: 08/10/2024]
Abstract
The transmembrane protein known as the mitochondrial calcium uniporter (MCU) mediates the influx of calcium ions (Ca2+) into the mitochondrial matrix. An overload of mitochondrial Ca2+ ( m Ca2+) is directly linked to damaging effects in pathological conditions. Therefore, inhibitors of the MCU are important chemical biology tools and therapeutic agents. Here, two new analogues of previously reported Ru- and Os-based MCU inhibitors Ru265 and Os245, of the general formula [(C10H15CO2)M(NH3)4(μ-N)M(NH3)4(O2CC10H15)](CF3SO3)3, where M = Ru (1) or Os (2), are reported. These analogues bear adamantane functional groups, which were installed to act as guests for the host molecule cucurbit-[7]-uril (CB[7]). These complexes were characterized and analyzed for their efficiency as guests for CB[7]. As shown through a variety of spectroscopic techniques, each adamantane ligand is encapsulated into one CB[7], affording a supramolecular complex of 1 : 2 stoichiometry. The biological effects of these compounds in the presence and absence of two equiv. CB[7] were assessed. Both complexes 1 and 2 exhibit enhanced cellular uptake compared to the parent compounds Ru265 and Os245, and their uptake is increased further in the presence of CB[7]. Compared to Ru265 and Os245, 1 and 2 are less potent as m Ca2+ uptake inhibitors in permeabilized cell models. However, in intact cell systems, 1 and 2 inhibit the MCU at concentrations as low as 1 μM, marking an advantage over Ru265 and Os245 which require an order of magnitude higher doses for similar biological effects. The presence of CB[7] did not affect the inhibitory properties of 1 and 2. Experiments in primary cortical neurons showed that 1 and 2 can elicit protective effects against oxygen-glucose deprivation at lower doses than those required for Ru265 or Os245. At low concentrations, the protective effects of 1 were modulated by CB[7], suggesting that supramolecular complex formation can play a role in these biological conditions. The in vivo biocompatibility of 1 was investigated in mice. The intraperitoneal administration of these compounds and their CB[7] complexes led to time-dependent induction of seizures with no protective effects elicited by CB[7]. This work demonstrates the potential for supramolecular interactions in the development of MCU inhibitors.
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Affiliation(s)
- Nicholas P Bigham
- Department of Chemistry and Chemical Biology, Cornell University Ithaca NY 14853 USA
| | - Robyn J Novorolsky
- Department of Pharmacology, Faculty of Medicine, Dalhousie University 6th Floor Sir Charles Tupper Medical Building Halifax B3H 4R2 Canada
- Brain Repair Centre, Faculty of Medicine, Dalhousie University, Life Sciences Research Institute Halifax NS B3H 4R2 Canada
| | - Keana R Davis
- Department of Chemistry, University of San Francisco San Francisco CA 94117 USA
| | - Haipei Zou
- Department of Chemistry and Chemical Biology, Cornell University Ithaca NY 14853 USA
- Department of Chemistry & Biochemistry, University of California Santa Barbara Santa Barbara CA 93106 USA
| | - Samantha N MacMillan
- Department of Chemistry and Chemical Biology, Cornell University Ithaca NY 14853 USA
| | - Michael J Stevenson
- Department of Chemistry, University of San Francisco San Francisco CA 94117 USA
| | - George S Robertson
- Department of Pharmacology, Faculty of Medicine, Dalhousie University 6th Floor Sir Charles Tupper Medical Building Halifax B3H 4R2 Canada
- Brain Repair Centre, Faculty of Medicine, Dalhousie University, Life Sciences Research Institute Halifax NS B3H 4R2 Canada
- Department of Psychiatry, Faculty of Medicine, Dalhousie University Halifax NS B3H 2E2 Canada
| | - Justin J Wilson
- Department of Chemistry and Chemical Biology, Cornell University Ithaca NY 14853 USA
- Department of Chemistry & Biochemistry, University of California Santa Barbara Santa Barbara CA 93106 USA
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2
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Artizzu F, Marchiò L, Pilia L, Serpe A, Deplano P. Heteroleptic Co(III) bisdithiocarbamato-dithione complexes: Synthesis, structure and bonding of [Co(Et 2dtc) 2(R 2pipdt)]BF 4 (R = Me, 1; Ph, 2; pipdt = piperazin-2,3-dithione) complexes. J COORD CHEM 2022. [DOI: 10.1080/00958972.2022.2126770] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/14/2022]
Affiliation(s)
- Flavia Artizzu
- Dipartimento di Sviluppo Sostenibile e Transizione Ecologica (DISSTE), Università del Piemonte Orientale, Vercelli, Italy
| | | | - Luca Pilia
- Dipartimento di Ingegneria Meccanica, Chimica e dei Materiali, Università di Cagliari, Cagliari, Italy
| | - Angela Serpe
- Dipartimento di Ingegneria Civile, INSTM Research Unit, Università di Cagliari, Cagliari, Italy
- Istituto di Geologia Ambientale e Geoingegneria, Consiglio Nazionale delle Ricerche (IGAG-CNR), Cagliari, Italy
| | - Paola Deplano
- Dipartimento di Ingegneria Civile, INSTM Research Unit, Università di Cagliari, Cagliari, Italy
- Dipartimento di Scienze Chimiche e Geologiche, Università di Cagliari, Monserrato, Italy
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3
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Núñez-Zarur F, Díaz López E, Restrepo A. Alkane C-H activation and ligand exchange on silica supported d 0 metal alkylidenes: relevance to alkane metathesis. Dalton Trans 2022; 51:6416-6426. [PMID: 35388847 DOI: 10.1039/d2dt00434h] [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]
Abstract
In this work, we study the ligand exchange process between an alkane and a series of silica supported metal alkylidenes, which may occur by different pathways: C-H addition, σ-bond metathesis, and α-H abstraction. The results indicate that the α-H abstraction pathway is the preferred one, regardless of the catalyst and ligands. This is in contrast to the expected preference for the C-H addition route. When looking for the origin of this preference, our calculations revealed that the α-H abstraction pathway is driven by entropy, which favors the initial dissociation of the alkyl ligand from the catalyst.
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Affiliation(s)
- Francisco Núñez-Zarur
- Facultad de Ciencias Básicas, Universidad de Medellín, Carrera 87 N° 30-65, 050026 Medellín, Colombia.
| | - Estefanía Díaz López
- Departament de Química, Universitat Autònoma de Barcelona, 08193 Cerdanyola del Vallès, Spain
| | - Albeiro Restrepo
- Instituto de Química, Universidad de Antioquia, Calle 70 N° 52-21, 050010 Medellín, Colombia
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4
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Vorobyeva SN, Shekhovtsov NA, Baidina IA, Sukhikh TS, Tkachev SV, Bushuev MB, Belyaev AV. The saga of rhodium(III) nitrate complexes and their speciation in solution: An integrated experimental and quantum chemical study. Polyhedron 2022. [DOI: 10.1016/j.poly.2021.115564] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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5
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Sánchez Delgado GY, Arvellos JFA, Paschoal DFS, Dos Santos HF. Role of the Enzymatic Environment in the Reactivity of the Au III-C^N^C Anticancer Complexes. Inorg Chem 2021; 60:3181-3195. [PMID: 33600154 DOI: 10.1021/acs.inorgchem.0c03521] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
The action mechanism of anticancer gold(III) complexes is a multi-step process and depends on their redox stability. First, the gold(III) complex undergoes a ligand exchange reaction in the presence of cellular thiols, such as those available in the active site of the enzyme TrxR, and then, the AuIII → AuI reduction occurs. Most experimental and theoretical studies describe these processes under chemical conditions without considering the enzyme structure effect. In the present study, molecular models are proposed for the [AuIII(C^N^C)(SHCys-R)]+ adduct, with the [AuIII(C^N^C)]+ moiety bonded to the Cys498 residue in the C-terminal arm of the TrxR. This one represents the product of the first ligand exchange reaction. Overall, our results suggest that the exchange of the auxiliary ligand (for instance, Cl- to S-R) plays a primary role in increasing the reduction potential, with the enzyme structure having a small effect. The parent compound [AuIII(C^N^C)Cl] has E° = -1.20 V, which enlarges to -0.72 V for [AuIII(C^N^C)CH3SH]+ and to -0.65 V for the largest model studied, Au-trx. In addition to the effect of the enzyme structure on the redox stability, we also analyze the Au transfer to the enzyme using a small peptide model (a tetramer). This reaction is dependent on the Cys497 protonation state. Thermodynamics and kinetic analysis suggests that the C^N^C ligand substitution by Cys497 is an exergonic process, with an energy barrier estimated at 20.2 kcal mol-1. The complete transfer of the Au ion to the enzyme's active site would lead to a total loss of enzyme activity, generating oxidative damage and, consequently, cancer cell death.
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Affiliation(s)
- Giset Y Sánchez Delgado
- NEQC: Núcleo de Estudos em Química Computacional, Department of Chemistry, Federal University of Juiz de Fora, Campus Universitário Martelos, 36.036-900 Juiz de Fora, Minas Gerais, Brazil
| | - Júlio F A Arvellos
- NEQC: Núcleo de Estudos em Química Computacional, Department of Chemistry, Federal University of Juiz de Fora, Campus Universitário Martelos, 36.036-900 Juiz de Fora, Minas Gerais, Brazil
| | - Diego F S Paschoal
- NQTCM: Núcleo de Química Teórica e Computacional de Macaé, Polo Ajuda, Universidade Federal do Rio de Janeiro, Campus UFRJ-Macaé, 27.971-525 Macaé, Rio de Janeiro, Brazil
| | - Hélio F Dos Santos
- NEQC: Núcleo de Estudos em Química Computacional, Department of Chemistry, Federal University of Juiz de Fora, Campus Universitário Martelos, 36.036-900 Juiz de Fora, Minas Gerais, Brazil
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Saleh M, Zam ZZ, Hofer TS. Solvent influence on the presence of axial ligand coordination: A QMCF-MD study of the structural and dynamical properties of Pd(II) and Pd(II) tetra-ammine in aqueous solution. J Mol Liq 2021. [DOI: 10.1016/j.molliq.2020.114612] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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7
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Dong S, Bi S. The solvation effect on the rattling behaviour of the hydrated excess proton in water. Phys Chem Chem Phys 2019; 21:22385-22389. [PMID: 31577286 DOI: 10.1039/c9cp03827b] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
The solvation effect on the kinetic rattling behaviour of the hydrated excess proton H+(aq) in water is theoretically modeled by using density functional theory (DFT) and the quantum chemical cluster model (CM). To test the solvation effects on the proton morphology and rattling kinetics, different solvation models for the proton are constructed based on the gas phase (GP) Zundel cation, which include the gas phase-polarizable continuum model (GP-PCM), the gas phase-supermolecule model (GP-SM), and the gas phase-supermolecule-polarizable continuum model (GP-SM-PCM). These solvation models consider either one or both of the short- and long-range solute-solvent interactions. Meanwhile, 1 to 6 explicit solvent water molecules (Nm' = 1-6) are added around the GP Zundel cation to test different explicit solvation environments. The calculation results show that the solvation environment has an important influence on the morphology and rattling kinetics of H+(aq). The proton rattling pathways are obtained only under the condition that both symmetrical explicit solvation environments and implicit bulk solvents are present. The zero-point contribution reduces the reaction energy barrier and enables the rattling to occur spontaneously at room temperature. The theoretical modeling results provide new insights into the microscopic kinetic behaviour of proton rattling in water at the molecular level, which are helpful in studying the proton transfer mechanism in aqueous systems.
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Affiliation(s)
- Shaonan Dong
- School of Chemistry and Chemical Engineering, State Key Laboratory of Coordination Chemistry of China & Key Laboratory of MOE for Life Science, Nanjing University, Nanjing 210023, China.
| | - Shuping Bi
- School of Chemistry and Chemical Engineering, State Key Laboratory of Coordination Chemistry of China & Key Laboratory of MOE for Life Science, Nanjing University, Nanjing 210023, China.
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8
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Shiekh BA. Hierarchy of Commonly Used DFT Methods for Predicting the Thermochemistry of Rh-Mediated Chemical Transformations. ACS OMEGA 2019; 4:15435-15443. [PMID: 31572844 PMCID: PMC6761679 DOI: 10.1021/acsomega.9b01563] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 05/28/2019] [Accepted: 09/04/2019] [Indexed: 06/10/2023]
Abstract
The accuracy and reliability of 17 commonly used density functionals in conjunction with Poisson-Boltzmann finite solvation model were gauged for predicting the free energy of Rh(I)- and Rh(III)-mediated chemical transformations such as ligand exchange, hydride elimination, dihydrogen elimination, chloride affinity, and silyl hydride bond activation reactions. In total, six Rh-mediated reactions were examined, and the computed density functional theory results were then subjected to comparison with the experimentally reported values. For reaction A, involving replacement of N2 with η2-H2 over Rh(I), MPWB1K-D3, B3PW91, B3LYP, and BHandHYLP emerged to be the best functionals of all the tested methods in terms of their deviations ≤2 kcal mol-1 from experimental data. For reaction B, in which exchange of η2-C2H4 with N2 over Rh(I) takes place, MPWB1K-D3 and M06-2X-D3 functionals performed the best, while as for reaction C (hydride elimination reaction in Rh(III) complex), it is PBE functional that showed impressive performance. Similarly, for reaction D (H2 elimination reaction in Rh(III) complex), PBE0-D3 and PBE-D3 showed exceptional results compared to other functionals. For reaction E (H2O/Cl- exchange), the PBE0 again shows impressive performance as compared to other functionals. For reaction F (Si-H activation), M06-2X-D3, PBE0-D3, and MPWB1K-D3 functionals are undoubtedly the best functionals. Overall, PBE0-D3 and MPWB1K-D3 functionals were impressive in all cases with lowest mean unsigned errors (3.2 and 3.4 kcal mol-1, respectively) with respect to experimental Gibbs free energies. Thus, these two functionals are recommended for studying Rh-mediated chemical transformations.
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9
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Renard N, Brenner E, Matt D, Gourlaouen C. Adaptive Behavior of a Ditopic Phosphine Ligand. Eur J Inorg Chem 2019. [DOI: 10.1002/ejic.201900571] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Nicolas Renard
- Laboratoire de Chimie Inorganique Moléculaire et Catalyse Institut de Chimie UMR 7177 CNRS‐Université de Strasbourg 4 rue Blaise Pascal 67070 Strasbourg cedex France
| | - Eric Brenner
- Laboratoire de Chimie Inorganique Moléculaire et Catalyse Institut de Chimie UMR 7177 CNRS‐Université de Strasbourg 4 rue Blaise Pascal 67070 Strasbourg cedex France
| | - Dominique Matt
- Laboratoire de Chimie Inorganique Moléculaire et Catalyse Institut de Chimie UMR 7177 CNRS‐Université de Strasbourg 4 rue Blaise Pascal 67070 Strasbourg cedex France
| | - Christophe Gourlaouen
- Laboratoire de Chimie Quantique Institut de Chimie UMR 7177 CNRS‐Université de Strasbourg 1 rue Blaise Pascal 67008 Strasbourg cedex France
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10
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Belaid I, Poradowski MN, Bouaouli S, Thuilliez J, Perrin L, D’Agosto F, Boisson C. Dialkenylmagnesium Compounds in Coordinative Chain Transfer Polymerization of Ethylene. Reversible Chain Transfer Agents and Tools To Probe Catalyst Selectivities toward Ring Formation. Organometallics 2018. [DOI: 10.1021/acs.organomet.8b00127] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Islem Belaid
- Université de Lyon, Univ. Lyon 1, CPE Lyon, CNRS UMR 5265, Laboratoire de Chimie Catalyse Polymères et Procédés (C2P2), Equipe LCPP, Bat 308F, 43 Bd du 11 Novembre 1918, F-69616 Villeurbanne, France
| | - Marie-Noëlle Poradowski
- Université de Lyon, Université Claude Bernard Lyon 1, CPE Lyon, INSA Lyon, ICBMS, CNRS UMR 5246, Equipe ITEMM, Bât
Curien, 43 Bd. du 11 Novembre 1918, 69622 Villeurbanne, France
| | - Samira Bouaouli
- Université de Lyon, Université Claude Bernard Lyon 1, CPE Lyon, INSA Lyon, ICBMS, CNRS UMR 5246, Equipe ITEMM, Bât
Curien, 43 Bd. du 11 Novembre 1918, 69622 Villeurbanne, France
| | - Julien Thuilliez
- MFP Michelin, 23 Place des Carmes Dechaux, 63040 Clermont-Ferrand, France
| | - Lionel Perrin
- Université de Lyon, Université Claude Bernard Lyon 1, CPE Lyon, INSA Lyon, ICBMS, CNRS UMR 5246, Equipe ITEMM, Bât
Curien, 43 Bd. du 11 Novembre 1918, 69622 Villeurbanne, France
| | - Franck D’Agosto
- Université de Lyon, Univ. Lyon 1, CPE Lyon, CNRS UMR 5265, Laboratoire de Chimie Catalyse Polymères et Procédés (C2P2), Equipe LCPP, Bat 308F, 43 Bd du 11 Novembre 1918, F-69616 Villeurbanne, France
| | - Christophe Boisson
- Université de Lyon, Univ. Lyon 1, CPE Lyon, CNRS UMR 5265, Laboratoire de Chimie Catalyse Polymères et Procédés (C2P2), Equipe LCPP, Bat 308F, 43 Bd du 11 Novembre 1918, F-69616 Villeurbanne, France
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11
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Liu L, Zhang J, Dong S, Zhang F, Wang Y, Bi S. Density functional theory studies on the solvent effects in Al(H 2O) 63+ water-exchange reactions: the number and arrangement of outer-sphere water molecules. Phys Chem Chem Phys 2018; 20:7342-7350. [PMID: 29485659 DOI: 10.1039/c7cp07311a] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
Density functional theory (DFT) calculations combined with cluster models are performed at the B3LYP/6-311+G(d,p) level for investigating the solvent effects in Al(H2O)63+ water-exchange reactions. A "One-by-one" method is proposed to obtain the most representative number and arrangement of explicit H2Os in the second hydration sphere. First, all the possible ways to locate one explicit H2O in second sphere (Nm' = 1) based on the gas phase structure (Nm' = 0) are examined, and the optimal pathway (with the lowest energy barrier) for Nm' = 1 is determined. Next, more explicit H2Os are added one by one until the inner-sphere is fully hydrogen bonded. Finally, the optimal pathways with Nm' = 0-7 are obtained. The structural and energetic parameters as well as the lifetimes of the transition states are compared with the results obtained with the "Independent-minimum" method and the "Independent-average" method, and all three methods show that the pathway with Nm' = 6 may be representative. Our results give a new idea for finding the representative pathway for water-exchange reactions in other hydrated metal ion systems.
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Affiliation(s)
- Li Liu
- School of Chemistry and Chemical Engineering, State Key Laboratory of Coordination Chemistry of China & Key Laboratory of MOE for Life Science, Nanjing University, Nanjing 210023, China.
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12
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Clean and selective catalytic C-H alkylation of alkenes with environmental friendly alcohols. MOLECULAR CATALYSIS 2017. [DOI: 10.1016/j.molcata.2016.09.010] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
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13
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Reinhard M, Auböck G, Besley NA, Clark IP, Greetham GM, Hanson-Heine MWD, Horvath R, Murphy TS, Penfold TJ, Towrie M, George MW, Chergui M. Photoaquation Mechanism of Hexacyanoferrate(II) Ions: Ultrafast 2D UV and Transient Visible and IR Spectroscopies. J Am Chem Soc 2017; 139:7335-7347. [DOI: 10.1021/jacs.7b02769] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Marco Reinhard
- Ecole polytechnique Fédérale de Lausanne, Laboratoire de spectroscopie ultrarapide, ISIC, and Lausanne Centre
for Ultrafast Science (LACUS), FSB, Station 6, CH-1015 Lausanne, Switzerland
| | - Gerald Auböck
- Ecole polytechnique Fédérale de Lausanne, Laboratoire de spectroscopie ultrarapide, ISIC, and Lausanne Centre
for Ultrafast Science (LACUS), FSB, Station 6, CH-1015 Lausanne, Switzerland
| | - Nicholas A. Besley
- School
of Chemistry, University of Nottingham, Nottingham NG7 2RD, United Kingdom
| | - Ian P. Clark
- Central
Laser Facility, Research Complex at Harwell Science and Technology
Facilities Council, Rutherford Appleton Laboratory, Harwell Oxford, Didcot, Oxfordshire OX11 0QX, United Kingdom
| | - Gregory M. Greetham
- Central
Laser Facility, Research Complex at Harwell Science and Technology
Facilities Council, Rutherford Appleton Laboratory, Harwell Oxford, Didcot, Oxfordshire OX11 0QX, United Kingdom
| | | | - Raphael Horvath
- School
of Chemistry, University of Nottingham, Nottingham NG7 2RD, United Kingdom
| | - Thomas S. Murphy
- School
of Chemistry, University of Nottingham, Nottingham NG7 2RD, United Kingdom
| | - Thomas J. Penfold
- School
of Chemistry, Newcastle University, Newcastle upon Tyne NE1
7RU, United Kingdom
| | - Michael Towrie
- Central
Laser Facility, Research Complex at Harwell Science and Technology
Facilities Council, Rutherford Appleton Laboratory, Harwell Oxford, Didcot, Oxfordshire OX11 0QX, United Kingdom
| | - Michael W. George
- School
of Chemistry, University of Nottingham, Nottingham NG7 2RD, United Kingdom
- Department
of Chemical and Environmental Engineering, University of Nottingham Ningbo China, 199 Taikang East Road, Ningbo 315100, China
| | - Majed Chergui
- Ecole polytechnique Fédérale de Lausanne, Laboratoire de spectroscopie ultrarapide, ISIC, and Lausanne Centre
for Ultrafast Science (LACUS), FSB, Station 6, CH-1015 Lausanne, Switzerland
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14
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H-bonding directed formation of 1D-single chains, 2D-sheets, and 3D structures in magnetically coupled tetranuclear nickel(II) complexes with incomplete double cubane core. Polyhedron 2017. [DOI: 10.1016/j.poly.2016.12.001] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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15
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Pilgrim CD, Zavarin M, Casey WH. Pressure Dependence of Carbonate Exchange with [NpO 2(CO 3) 3] 4- in Aqueous Solutions. Inorg Chem 2017; 56:661-666. [PMID: 27959524 DOI: 10.1021/acs.inorgchem.6b02604] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The rates of ligand exchange into the geochemically important [NpO2(CO3)3]4- aqueous complex are measured as a function of pressure in order to complement existing data on the isostructural [UO2(CO3)3]4- complex. Experiments are conducted at pH conditions where the rate of exchange is independent of the proton concentration. Unexpectedly, the experiments show a distinct difference in the pressure dependencies of rates of exchange for the uranyl and neptunyl complexes.
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Affiliation(s)
| | - Mavrik Zavarin
- Glenn T. Seaborg Institute, Physical & Life Sciences, Lawrence Livermore National Laboratory , Livermore, California 94550, United States
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16
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Rotzinger FP. Quantum Chemical Investigation of the Transition States and Intermediates for the Reaction of the Nitrosonium Ion with the Pentaammineazidocobalt(III) Ion. Inorg Chem 2016; 55:12707-12715. [DOI: 10.1021/acs.inorgchem.6b01915] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- François P. Rotzinger
- Institut des Sciences et
Ingénierie Chimiques, Ecole Polytechnique Fédérale de Lausanne (EPFL), Station 6, CH-1015 Lausanne, Switzerland
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17
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Fabrizio A, Rotzinger FP. Quantum Chemical Study of the Water Exchange Mechanism of the Americyl(VI) Aqua Ion. Inorg Chem 2016; 55:11147-11152. [DOI: 10.1021/acs.inorgchem.6b01793] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Alberto Fabrizio
- Institut des Sciences et Ingénierie Chimiques, Ecole Polytechnique Fédérale de Lausanne (EPFL), Station 6, CH-1015 Lausanne, Switzerland
| | - François P. Rotzinger
- Institut des Sciences et Ingénierie Chimiques, Ecole Polytechnique Fédérale de Lausanne (EPFL), Station 6, CH-1015 Lausanne, Switzerland
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18
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Poater A, Vummaleti SVC, Polo A, Cavallo L. Mechanistic Insights of a Selective C-H Alkylation of Alkenes by a Ru-based Catalyst and Alcohols. ChemistrySelect 2016. [DOI: 10.1002/slct.201600860] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Albert Poater
- Institut de Química Computacional i Catàlisi and Departament de Química; Universitat de Girona, Campus Montilivi; 17003 Girona, Catalonia Spain
| | - Sai Vikrama Chaitanya Vummaleti
- KAUST Catalysis Center, Physical Sciences and Engineering Division; King Abdullah University of Science and Technology; Thuwal 23955-6900 Saudi Arabia
| | - Alfonso Polo
- Institut de Química Computacional i Catàlisi and Departament de Química; Universitat de Girona, Campus Montilivi; 17003 Girona, Catalonia Spain
| | - Luigi Cavallo
- KAUST Catalysis Center, Physical Sciences and Engineering Division; King Abdullah University of Science and Technology; Thuwal 23955-6900 Saudi Arabia
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19
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Göttle AJ, Alary F, Boggio-Pasqua M, Dixon IM, Heully JL, Bahreman A, Askes SHC, Bonnet S. Pivotal Role of a Pentacoordinate (3)MC State on the Photocleavage Efficiency of a Thioether Ligand in Ruthenium(II) Complexes: A Theoretical Mechanistic Study. Inorg Chem 2016; 55:4448-56. [PMID: 27054312 DOI: 10.1021/acs.inorgchem.6b00268] [Citation(s) in RCA: 35] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
A mechanistic study of the photocleavage of the methylthioethanol ligand (Hmte) in the series of ruthenium complexes [Ru(tpy)(N-N)(Hmte)](2+) (tpy = 2,2':6',2″-terpyridine, N-N = bpy (2,2'-bipyridine), biq (2,2'-biquinoline), dcbpy (6,6'-dichloro-2,2'-bipyridine), dmbpy (6,6'-dimethyl-2,2'-bipyridine)) was performed using density functional theory. These studies reveal the decisive role of two quasi-degenerate triplet metal-centered states, denoted (3)MChexa and (3)MCpenta, on the lowest triplet potential energy surface. It also shows how the population of the specific pentacoordinate (3)MCpenta state, characterized by a geometry more accessible for the attack of a solvent molecule, is a key step for the efficiency of the photosubstitution reaction. The difference in the photosubstitution quantum yields experimentally observed for this series of complexes (from φ = 0.022 for N-N = bpy up to φ = 0.30 for N-N = dmbpy) is rationalized by the existence of this (3)MCpenta photoreactive state and by the different topologies of the triplet excited-state potential energy surfaces, rather than by the sole steric properties of these polypyridinyl ligands.
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Affiliation(s)
- Adrien J Göttle
- Laboratoire de Chimie et Physique Quantiques, UMR 5626, IRSAMC, CNRS et Université de Toulouse , 118 route de Narbonne, 31062 Toulouse, France
| | - Fabienne Alary
- Laboratoire de Chimie et Physique Quantiques, UMR 5626, IRSAMC, CNRS et Université de Toulouse , 118 route de Narbonne, 31062 Toulouse, France
| | - Martial Boggio-Pasqua
- Laboratoire de Chimie et Physique Quantiques, UMR 5626, IRSAMC, CNRS et Université de Toulouse , 118 route de Narbonne, 31062 Toulouse, France
| | - Isabelle M Dixon
- Laboratoire de Chimie et Physique Quantiques, UMR 5626, IRSAMC, CNRS et Université de Toulouse , 118 route de Narbonne, 31062 Toulouse, France
| | - Jean-Louis Heully
- Laboratoire de Chimie et Physique Quantiques, UMR 5626, IRSAMC, CNRS et Université de Toulouse , 118 route de Narbonne, 31062 Toulouse, France
| | - Azadeh Bahreman
- Leiden Institute of Chemistry, Leiden University , Einsteinweg 55, 2333 CC Leiden, The Netherlands
| | - Sven H C Askes
- Leiden Institute of Chemistry, Leiden University , Einsteinweg 55, 2333 CC Leiden, The Netherlands
| | - Sylvestre Bonnet
- Leiden Institute of Chemistry, Leiden University , Einsteinweg 55, 2333 CC Leiden, The Netherlands
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20
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Poater A. Moving from Classical Ru-NHC to Neutral or Charged Rh-NHC Based Catalysts in Olefin Metathesis. Molecules 2016; 21:177. [PMID: 26840290 PMCID: PMC6273139 DOI: 10.3390/molecules21020177] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2015] [Revised: 01/13/2016] [Accepted: 01/28/2016] [Indexed: 11/26/2022] Open
Abstract
Considering the versatility of oxidation states of rhodium together with the successful background of ruthenium-N-heterocyclic carbene based catalysts in olefin metathesis, it is envisaged the exchange of the ruthenium of the latter catalysts by rhodium, bearing an open-shell neutral rhodium center, or a +1 charged one. In the framework of in silico experiments, density functional theory (DFT) calculations have been used to plot the first catalytic cycle that as a first step includes the release of the phosphine. DFT is, in this case, the tool that allows the discovery of the less endergonic reaction profile from the precatalytic species for the neutral catalyst with respect to the corresponding ruthenium one; increasing the endergonic character when dealing with the charged system.
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Affiliation(s)
- Albert Poater
- Institut de Química Computacional i Catàlisi and Departament de Química, Universitat de Girona, Campus Montilivi, 17071 Girona, Catalonia, Spain.
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21
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Kefalidis CE, Castro L, Perrin L, Rosal ID, Maron L. New perspectives in organolanthanide chemistry from redox to bond metathesis: insights from theory. Chem Soc Rev 2016; 45:2516-43. [DOI: 10.1039/c5cs00907c] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
A fifteen year contribution of computational studies carried out in close synergy with experiments is summarized.
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22
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Kanjana K, Courtin B, MacConnell A, Bartels DM. Reactions of Hexa-aquo Transition Metal Ions with the Hydrated Electron up to 300 °C. J Phys Chem A 2015; 119:11094-104. [DOI: 10.1021/acs.jpca.5b08812] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Kotchaphan Kanjana
- Notre Dame Radiation Laboratory & Department of Chemistry and Biochemistry, University of Notre Dame, Notre Dame, Indiana 46556 United States
| | - Bruce Courtin
- Notre Dame Radiation Laboratory & Department of Chemistry and Biochemistry, University of Notre Dame, Notre Dame, Indiana 46556 United States
| | - Ashley MacConnell
- Notre Dame Radiation Laboratory & Department of Chemistry and Biochemistry, University of Notre Dame, Notre Dame, Indiana 46556 United States
| | - David M. Bartels
- Notre Dame Radiation Laboratory & Department of Chemistry and Biochemistry, University of Notre Dame, Notre Dame, Indiana 46556 United States
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23
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Rotzinger FP. Structure and Properties of Precursor/Successor Complex and Transition State of the FeCl 2+/Fe 2+ Electron Self-Exchange Reaction via the Inner-Sphere Pathway. Inorg Chem 2015; 54:10450-6. [DOI: 10.1021/acs.inorgchem.5b01916] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- François P. Rotzinger
- Institut des Sciences et Ingénierie
Chimiques, Ecole Polytechnique Fédérale de Lausanne (EPFL), Station
6, CH-1015 Lausanne, Switzerland
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24
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Hu L, Chen H. Assessment of DFT Methods for Computing Activation Energies of Mo/W-Mediated Reactions. J Chem Theory Comput 2015; 11:4601-14. [DOI: 10.1021/acs.jctc.5b00373] [Citation(s) in RCA: 41] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Affiliation(s)
- Lianrui Hu
- Beijing National Laboratory
for Molecular Sciences (BNLMS), CAS Key Laboratory of Photochemistry,
Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China
| | - Hui Chen
- Beijing National Laboratory
for Molecular Sciences (BNLMS), CAS Key Laboratory of Photochemistry,
Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China
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25
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Stripp ST, Lindenstrauss U, Sawers RG, Soboh B. Identification of an Isothiocyanate on the HypEF Complex Suggests a Route for Efficient Cyanyl-Group Channeling during [NiFe]-Hydrogenase Cofactor Generation. PLoS One 2015; 10:e0133118. [PMID: 26186649 PMCID: PMC4506123 DOI: 10.1371/journal.pone.0133118] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2015] [Accepted: 06/24/2015] [Indexed: 01/12/2023] Open
Abstract
[NiFe]–hydrogenases catalyze uptake and evolution of H2 in a wide range of microorganisms. The enzyme is characterized by an inorganic nickel/ iron cofactor, the latter of which carries carbon monoxide and cyanide ligands. In vivo generation of these ligands requires a number of auxiliary proteins, the so–called Hyp family. Initially, HypF binds and activates the precursor metabolite carbamoyl phosphate. HypF catalyzes removal of phosphate and transfers the carbamate group to HypE. In an ATP–dependent condensation reaction, the C–terminal cysteinyl residue of HypE is modified to what has been interpreted as thiocyanate. This group is the direct precursor of the cyanide ligands of the [NiFe]–hydrogenase active site cofactor. We present a FT–IR analysis of HypE and HypF as isolated from E. coli. We follow the HypF–catalyzed cyanation of HypE in vitro and screen for the influence of carbamoyl phosphate and ATP. To elucidate on the differences between HypE and the HypEF complex, spectro–electrochemistry was used to map the vibrational Stark effect of naturally cyanated HypE. The IR signature of HypE could ultimately be assigned to isothiocyanate (–N=C=S) rather than thiocyanate (–S–C≡N). This has important implications for cyanyl–group channeling during [NiFe]–hydrogenase cofactor generation.
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Affiliation(s)
- Sven T. Stripp
- Department of Physics, Freie Universität Berlin, Berlin, Germany
- * E-mail:
| | - Ute Lindenstrauss
- Institute of Microbiology, Martin–Luther University Halle–Wittenberg, Halle (Saale), Germany
| | - R. Gary Sawers
- Institute of Microbiology, Martin–Luther University Halle–Wittenberg, Halle (Saale), Germany
| | - Basem Soboh
- Institute of Microbiology, Martin–Luther University Halle–Wittenberg, Halle (Saale), Germany
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26
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Prlj A, Rotzinger FP. Investigation of the water exchange mechanism of the Plutonyl(VI) and Uranyl(VI) ions with quantum chemical methods. J COORD CHEM 2015. [DOI: 10.1080/00958972.2015.1059425] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Affiliation(s)
- Antonio Prlj
- Institut des Sciences et Ingénierie Chimiques, Ecole Polytechnique Fédérale de Lausanne (EPFL), Lausanne, Switzerland
| | - François P. Rotzinger
- Institut des Sciences et Ingénierie Chimiques, Ecole Polytechnique Fédérale de Lausanne (EPFL), Lausanne, Switzerland
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27
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Mereshchenko AS, Olshin PK, Karabaeva KE, Panov MS, Wilson RM, Kochemirovsky VA, Skripkin MY, Tveryanovich YS, Tarnovsky AN. Mechanism of Formation of Copper(II) Chloro Complexes Revealed by Transient Absorption Spectroscopy and DFT/TDDFT Calculations. J Phys Chem B 2015; 119:8754-63. [PMID: 26079181 DOI: 10.1021/acs.jpcb.5b03889] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Copper(II) complexes are extremely labile with typical ligand exchange rate constants on the order of 10(6)-10(9) M(-1) s(-1). As a result, it is often difficult to identify the actual formation mechanism of these complexes. In this work, using UV-vis transient absorption when probing in a broad time range (20 ps to 8 μs) in conjunction with DFT/TDDFT calculations, we studied the dynamics and underlying reaction mechanisms of the formation of extremely labile copper(II) CuCl4(2-) chloro complexes from copper(II) CuCl3(-) trichloro complexes and chloride ions. These two species, produced via photochemical dissociation of CuCl4(2-) upon 420 nm excitation into the ligand-to-metal-charge-transfer electronic state, are found to recombine into parent complexes with bimolecular rate constants of (9.0 ± 0.1) × 10(7) and (5.3 ± 0.4) × 10(8) M(-1) s(-1) in acetonitrile and dichloromethane, respectively. In dichloromethane, recombination occurs via a simple one-step addition. In acetonitrile, where [CuCl3](-) reacts with the solvent to form a [CuCl3CH3CN](-) complex in less than 20 ps, recombination takes place via ligand exchange described by the associative interchange mechanism that involves a [CuCl4CH3CN](2-) intermediate. In both solvents, the recombination reaction is potential energy controlled.
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Affiliation(s)
- Andrey S Mereshchenko
- †Institute of Chemistry, Saint-Petersburg State University, 198504 Saint-Petersburg, Russian Federation
| | - Pavel K Olshin
- †Institute of Chemistry, Saint-Petersburg State University, 198504 Saint-Petersburg, Russian Federation
| | - Kanykey E Karabaeva
- ‡Department of Chemistry and the Center for Photochemical Sciences, Bowling Green State University, Bowling Green, Ohio 43403, United States
| | - Maxim S Panov
- †Institute of Chemistry, Saint-Petersburg State University, 198504 Saint-Petersburg, Russian Federation
| | - R Marshall Wilson
- ‡Department of Chemistry and the Center for Photochemical Sciences, Bowling Green State University, Bowling Green, Ohio 43403, United States
| | - Vladimir A Kochemirovsky
- †Institute of Chemistry, Saint-Petersburg State University, 198504 Saint-Petersburg, Russian Federation
| | - Mikhail Yu Skripkin
- †Institute of Chemistry, Saint-Petersburg State University, 198504 Saint-Petersburg, Russian Federation
| | - Yury S Tveryanovich
- †Institute of Chemistry, Saint-Petersburg State University, 198504 Saint-Petersburg, Russian Federation
| | - Alexander N Tarnovsky
- ‡Department of Chemistry and the Center for Photochemical Sciences, Bowling Green State University, Bowling Green, Ohio 43403, United States
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28
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Pump E, Slugovc C, Cavallo L, Poater A. Mechanism of the Ru–Allenylidene to Ru–Indenylidene Rearrangement in Ruthenium Precatalysts for Olefin Metathesis. Organometallics 2015. [DOI: 10.1021/om501246q] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Affiliation(s)
- Eva Pump
- Institute
for Chemistry and Technology of Materials, Graz University of Technology, Stremayrgasse 9, A-8010 Graz, Austria
- Kaust
Catalysis Center, Physical Sciences and Engineering Division, King Abdullah University of Science and Technology, Thuwal 23955-6900, Saudi Arabia
| | - Christian Slugovc
- Institute
for Chemistry and Technology of Materials, Graz University of Technology, Stremayrgasse 9, A-8010 Graz, Austria
| | - Luigi Cavallo
- Kaust
Catalysis Center, Physical Sciences and Engineering Division, King Abdullah University of Science and Technology, Thuwal 23955-6900, Saudi Arabia
| | - Albert Poater
- Institut
de Química Computacional i Catàlisi and Departament
de Química, Universitat de Girona, Campus Montilivi, 17071 Girona, Catalonia, Spain
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29
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Sun Y, Hu L, Chen H. Comparative Assessment of DFT Performances in Ru- and Rh-Promoted σ-Bond Activations. J Chem Theory Comput 2015; 11:1428-38. [PMID: 26574354 DOI: 10.1021/ct5009119] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
In this work, the performances of 19 density functional theory (DFT) methods are calibrated comparatively on Ru- and Rh-promoted σ-bond (C-H, O-H, and H-H) activations. DFT calibration reference is generated from explicitly correlated coupled cluster CCSD(T)-F12 calculations, and the 4s4p core-valence correlation effect of the two 4d platinum group transition metals is also included. Generally, the errors of DFT methods for calculating energetics of Ru-/Rh-mediated reactions appear to correlate more with the magnitude of energetics itself than other factors such as metal identity. For activation energy calculations, the best performing functionals for both Ru and Rh systems are MN12SX < CAM-B3LYP < M06-L < MN12L < M06 < ωB97X < B3LYP < LC-ωPBE (in the order of increasing mean unsigned deviations, MUDs, of less than 2 kcal/mol). For reaction energy calculations, best functionals with MUDs less than 2 kcal/mol are PBE0 < CAM-B3LYP ≈ N12SX. The effect of the DFT empirical dispersion correction on the performance of the DFT methods is beneficial for most density functionals tested in this work, reducing their MUDs to different extents. After including empirical dispersion correction, ωB97XD, B3LYP-D3, and CAM-B3LYP-D3 (PBE0-D3, B3LYP-D3, and ωB97XD) are the three best performing DFs for activation energy (reaction energy) calculations, from which B3LYP-D3 and ωB97XD can notably be recommended uniformly for both the reaction energy and reaction barrier calculations. The good performance of B3LYP-D3 in quantitative description of the energetic trends further adds value to B3LYP-D3 and singles this functional out as a reasonable choice in the Ru/Rh-promoted σ-bond activation processes.
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Affiliation(s)
- Yuanyuan Sun
- Beijing National Laboratory for Molecular Sciences (BNLMS), CAS Key Laboratory of Photochemistry, Institute of Chemistry, Chinese Academy of Sciences , Beijing 100190, China
| | - Lianrui Hu
- Beijing National Laboratory for Molecular Sciences (BNLMS), CAS Key Laboratory of Photochemistry, Institute of Chemistry, Chinese Academy of Sciences , Beijing 100190, China
| | - Hui Chen
- Beijing National Laboratory for Molecular Sciences (BNLMS), CAS Key Laboratory of Photochemistry, Institute of Chemistry, Chinese Academy of Sciences , Beijing 100190, China
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30
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Riache N, Dery A, Callens E, Poater A, Samantaray M, Dey R, Hong J, Li K, Cavallo L, Basset JM. Silica-Supported Tungsten Carbynes (≡SiO)xW(≡CH)(Me)y (x = 1, y = 2; x = 2, y = 1): New Efficient Catalysts for Alkyne Cyclotrimerization. Organometallics 2015. [DOI: 10.1021/om500684e] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Affiliation(s)
- Nassima Riache
- Physical
Sciences and Engineering, Kaust Catalysis Center, King Abdullah University of Science and Technology (KAUST), Thuwal 23955-6900, Saudi Arabia
| | - Alexandre Dery
- Physical
Sciences and Engineering, Kaust Catalysis Center, King Abdullah University of Science and Technology (KAUST), Thuwal 23955-6900, Saudi Arabia
| | - Emmanuel Callens
- Physical
Sciences and Engineering, Kaust Catalysis Center, King Abdullah University of Science and Technology (KAUST), Thuwal 23955-6900, Saudi Arabia
| | - Albert Poater
- Physical
Sciences and Engineering, Kaust Catalysis Center, King Abdullah University of Science and Technology (KAUST), Thuwal 23955-6900, Saudi Arabia
- Institut
de Química Computacional i Catàlisi and Departament
de Química, Universitat de Girona, Campus de Motilivi, E-17071 Girona, Spain
| | - Manoja Samantaray
- Physical
Sciences and Engineering, Kaust Catalysis Center, King Abdullah University of Science and Technology (KAUST), Thuwal 23955-6900, Saudi Arabia
| | - Raju Dey
- Physical
Sciences and Engineering, Kaust Catalysis Center, King Abdullah University of Science and Technology (KAUST), Thuwal 23955-6900, Saudi Arabia
| | - Jinhua Hong
- Advanced
Nanofabrication, Imaging and Characterization Core Laboratory, King Abdullah University of Science and Technology, Thuwal 23955-6900, Saudi Arabia
| | - Kun Li
- Advanced
Nanofabrication, Imaging and Characterization Core Laboratory, King Abdullah University of Science and Technology, Thuwal 23955-6900, Saudi Arabia
| | - Luigi Cavallo
- Physical
Sciences and Engineering, Kaust Catalysis Center, King Abdullah University of Science and Technology (KAUST), Thuwal 23955-6900, Saudi Arabia
| | - Jean-Marie Basset
- Physical
Sciences and Engineering, Kaust Catalysis Center, King Abdullah University of Science and Technology (KAUST), Thuwal 23955-6900, Saudi Arabia
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31
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Rotzinger FP. Structure and properties of the precursor/successor complex and transition state of the CrCl²⁺/Cr²⁺ electron self-exchange reaction via the inner-sphere pathway. Inorg Chem 2014; 53:9923-31. [PMID: 25162781 DOI: 10.1021/ic5015785] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
The electron self-exchange reaction CrCl(OH2)5(2+) + Cr(OH2)6(2+) → Cr(OH2)6(2+) + CrCl(OH2)5(2+), proceeding via the inner-sphere pathway, was investigated with quantum-chemical methods. Geometry and vibrational frequencies of the precursor/successor (P/S) complex, (H2O)5Cr(III)ClCr(II)(OH2)5(4+)/(H2O)5Cr(II)ClCr(III)(OH2)5(4+), and the transition state (TS), (H2O)5CrClCr(OH2)5(4+‡), were computed with density functional theory (DFT) and conductor polarizable continuum model hydration. Consistent data were obtained solely with long-range-corrected functionals, whereby in this study, LC-BOP was used. Bent and linear structures were computed for the TS and P/S. The electronic coupling matrix element (H(ab)) and the reorganizational energy (λ) were calculated with multistate extended general multiconfiguration quasi-degenerate second-order perturbation theory. The nuclear tunneling factor (Γ(n)), the nuclear frequency factor (ν(n)), the electronic frequency factor (ν(el)), the electron transmission coefficient (κ(el)), and the first-order rate constant (k(et)) for the electron-transfer step (the conversion of the precursor complex into the successor complex) were calculated based on the imaginary frequency (ν(‡)) of the TS, the Gibbs activation energy (ΔG(‡)), H(ab), and λ. The formation of the precursor complex via water substitution at Cr(OH2)6(2+) was also investigated with DFT and found to be very fast. Thus, the electron-transfer step is rate-determining. For the substitution reaction, only a bent TS structure could be obtained. The overall rate constant (k) was estimated as the product K(A)k(et), whereby K(A) is the equilibrium constant for the formation of the ion aggregate of the reactants Cr(OH2)6(2+) and CrCl(OH2)5(2+), Cr(H2O)6·CrCl(OH2)5(4+) (IAR). k calculated for the bent and linear isomers agrees with the experimental value.
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Affiliation(s)
- François P Rotzinger
- Institut des Sciences et Ingénierie Chimiques, Ecole Polytechnique Fédérale de Lausanne (EPFL) , Station 6, CH-1015 Lausanne, Switzerland
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32
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Poater A, Pump E, Vummaleti SVC, Cavallo L. The Right Computational Recipe for Olefin Metathesis with Ru-Based Catalysts: The Whole Mechanism of Ring-Closing Olefin Metathesis. J Chem Theory Comput 2014; 10:4442-8. [DOI: 10.1021/ct5003863] [Citation(s) in RCA: 66] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Albert Poater
- Institut
de Química Computacional i Catàlisi and Departament
de Química, Universitat de Girona, Campus Montilivi, 17071 Girona, Catalonia, Spain
| | - Eva Pump
- Institute
for Chemistry and Technology of Materials, Graz University of Technology, Stremayrgasse 9, A 8010 Graz, Austria
- Kaust
Catalysis Center, Physical Sciences and Engineering Division, King Abdullah University of Science and Technology, Thuwal 23955-6900, Saudi Arabia
| | - Sai Vikrama Chaitanya Vummaleti
- Kaust
Catalysis Center, Physical Sciences and Engineering Division, King Abdullah University of Science and Technology, Thuwal 23955-6900, Saudi Arabia
| | - Luigi Cavallo
- Kaust
Catalysis Center, Physical Sciences and Engineering Division, King Abdullah University of Science and Technology, Thuwal 23955-6900, Saudi Arabia
- Dipartimento
di Chimica e Biologia, Università di Salerno, Via Ponte
don Melillo, I-84084 Fisciano (SA), Italy
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33
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Alzoubi BM, Weber I, Walther M, van Eikema Hommes N, Puchta R, van Eldik R. HCN exchange on [Cu(HCN) 4] +: a quantum chemical investigation. J COORD CHEM 2014. [DOI: 10.1080/00958972.2014.941828] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
Affiliation(s)
- Basam M. Alzoubi
- Inorganic Chemistry, Department of Chemistry and Pharmacy, University of Erlangen-Nürnberg, Erlangen, Germany
- Department of Basic Science, Al-Huson University College, Al-Balqa Applied University, Irbid, Jordan
| | - Immo Weber
- Inorganic Chemistry, Department of Chemistry and Pharmacy, University of Erlangen-Nürnberg, Erlangen, Germany
| | - Markus Walther
- Computer Chemistry Center, Department of Chemistry and Pharmacy, University of Erlangen-Nürnberg, Erlangen, Germany
| | - Nico van Eikema Hommes
- Computer Chemistry Center, Department of Chemistry and Pharmacy, University of Erlangen-Nürnberg, Erlangen, Germany
| | - Ralph Puchta
- Inorganic Chemistry, Department of Chemistry and Pharmacy, University of Erlangen-Nürnberg, Erlangen, Germany
- Computer Chemistry Center, Department of Chemistry and Pharmacy, University of Erlangen-Nürnberg, Erlangen, Germany
| | - Rudi van Eldik
- Inorganic Chemistry, Department of Chemistry and Pharmacy, University of Erlangen-Nürnberg, Erlangen, Germany
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34
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Annapureddy HVR, Dang LX. Understanding the rates and molecular mechanism of water-exchange around aqueous ions using molecular simulations. J Phys Chem B 2014; 118:8917-27. [PMID: 24911526 DOI: 10.1021/jp502922c] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Solvation processes occurring around aqueous ions are of fundamental importance in physics, chemistry, and biology. Over the past few decades, several experimental and theoretical studies were devoted to understanding ion solvation and the processes involved in it. In this article, we present a summary of our recent efforts that, through computer simulations, focused on providing a comprehensive understanding of solvent-exchange processes around aqueous ions. To accomplish these activities, we have looked at the mechanistic properties associated with the water-exchange process, such as potentials of mean force, time-dependent transmission coefficients, and the corresponding rate constants using transition state theory, the reactive flux method, and Grote-Hynes treatments of the dynamic response of the solvent.
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Affiliation(s)
- Harsha V R Annapureddy
- Physical Sciences Division, Pacific Northwest National Laboratory , Richland, Washington 93352, United States
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35
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Radical decomposition of hydrogen peroxide catalyzed by aqua complexes [M(H2O)n]2+ (M=Be, Zn, Cd). J Catal 2014. [DOI: 10.1016/j.jcat.2014.03.010] [Citation(s) in RCA: 40] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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36
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Annapureddy HVR, Dang LX. Water Exchange Rates and Molecular Mechanism around Aqueous Halide Ions. J Phys Chem B 2014; 118:7886-91. [DOI: 10.1021/jp500402j] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Harsha V. R. Annapureddy
- Physical Sciences
Division, Pacific Northwest National Laboratory, Richland, Washington 93352, United States
| | - Liem X. Dang
- Physical Sciences
Division, Pacific Northwest National Laboratory, Richland, Washington 93352, United States
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37
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Reinhard M, Penfold TJ, Lima FA, Rittmann J, Rittmann-Frank MH, Abela R, Tavernelli I, Rothlisberger U, Milne CJ, Chergui M. Photooxidation and photoaquation of iron hexacyanide in aqueous solution: A picosecond X-ray absorption study. STRUCTURAL DYNAMICS (MELVILLE, N.Y.) 2014; 1:024901. [PMID: 26798775 PMCID: PMC4711601 DOI: 10.1063/1.4871751] [Citation(s) in RCA: 42] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/29/2013] [Accepted: 04/07/2014] [Indexed: 05/03/2023]
Abstract
We present a picosecond Fe K-edge absorption study of photoexcited ferrous and ferric hexacyanide in water under 355 and 266 nm excitation. Following 355 nm excitation, the transient spectra for the ferrous and ferric complexes exhibit a red shift of the edge reflecting an increased electron density at the Fe atom. For the former, an enhanced pre-edge transition is also observed. These observations are attributed to the aquated [Fe(CN)5OH2](3-) species, based on quantum chemical calculations which also provide structural parameters. Upon 266 nm excitation of the ferric complex, a transient reminiscent of the aquated species is observed (appearance of a pre-edge feature and red shift of the edge) but it is different from that obtained under 355 nm excitation. This points to a new reaction channel occurring through an intermediate state lying between these two excitation energies. Finally, 266 nm excitation of the ferrous species is dominated by the photooxidation channel with formation of the ferric complex as main photoproduct. However, we observe an additional minor photoproduct, which is identical to the 266 nm generated photoproduct of the ferric species, suggesting that under our experimental conditions, the pump pulse photooxidises the ferrous complex and re-excites the primary ferric photoproduct.
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Affiliation(s)
- M Reinhard
- Ecole Polytechnique Fédérale de Lausanne, Laboratoire de Spectroscopie Ultrarapide , ISIC, FSB, CH-1015 Lausanne, Switzerland
| | | | - F A Lima
- Ecole Polytechnique Fédérale de Lausanne, Laboratoire de Spectroscopie Ultrarapide , ISIC, FSB, CH-1015 Lausanne, Switzerland
| | - J Rittmann
- Ecole Polytechnique Fédérale de Lausanne, Laboratoire de Spectroscopie Ultrarapide , ISIC, FSB, CH-1015 Lausanne, Switzerland
| | - M H Rittmann-Frank
- Ecole Polytechnique Fédérale de Lausanne, Laboratoire de Spectroscopie Ultrarapide , ISIC, FSB, CH-1015 Lausanne, Switzerland
| | - R Abela
- SwissFEL, Paul Scherrer Inst , CH-5232 Villigen, Switzerland
| | - I Tavernelli
- Ecole Polytechnique Fédérale de Lausanne, Laboratoire de Chimie et Biochimie Computationnelles , ISIC, FSB, CH-1015 Lausanne, Switzerland
| | - U Rothlisberger
- Ecole Polytechnique Fédérale de Lausanne, Laboratoire de Chimie et Biochimie Computationnelles , ISIC, FSB, CH-1015 Lausanne, Switzerland
| | | | - M Chergui
- Ecole Polytechnique Fédérale de Lausanne, Laboratoire de Spectroscopie Ultrarapide , ISIC, FSB, CH-1015 Lausanne, Switzerland
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38
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Sun Y, Chen H. Performance of Density Functionals for Activation Energies of Re-Catalyzed Organic Reactions. J Chem Theory Comput 2014; 10:579-88. [DOI: 10.1021/ct4010855] [Citation(s) in RCA: 41] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Yihua Sun
- Beijing National
Laboratory
for Molecular Sciences (BNLMS), CAS Key Laboratory of Photochemistry,
Institute of Chemistry, Chinese Academy of Sciences, Beijing, 100190, China
| | - Hui Chen
- Beijing National
Laboratory
for Molecular Sciences (BNLMS), CAS Key Laboratory of Photochemistry,
Institute of Chemistry, Chinese Academy of Sciences, Beijing, 100190, China
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39
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Jin X, Wu H, Jiang X, Zhang H. Effect of fluorine substitution on structures and reactivity of Keggin-Al13in aqueous solution: an exploration of the fluorine substitution mechanism. Phys Chem Chem Phys 2014; 16:10566-72. [DOI: 10.1039/c3cp55290j] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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40
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de la Cruz Cruz JI, Juárez-Saavedra P, Paz-Michel B, Leyva-Ramirez MA, Rajapakshe A, Vannucci AK, Lichtenberger DL, Paz-Sandoval MA. Phosphine-Substituted (η5-Pentadienyl) Manganese Carbonyl Complexes: Geometric Structures, Electronic Structures, and Energetic Properties of the Associative Substitution Mechanism, Including Isolation of the Slipped η3-Pentadienyl Associative Intermediate. Organometallics 2013. [DOI: 10.1021/om401017t] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
| | - Patricia Juárez-Saavedra
- Departamento de Quı́mica, Cinvestav, Av. IPN #
2508, Col. San Pedro Zacatenco, México
D. F. 07360, México
| | - Brenda Paz-Michel
- Departamento de Quı́mica, Cinvestav, Av. IPN #
2508, Col. San Pedro Zacatenco, México
D. F. 07360, México
| | | | - Asha Rajapakshe
- Department of Chemistry and Biochemistry, The University of Arizona, Tucson, Arizona 85721, United States
| | - Aaron K. Vannucci
- Department of Chemistry and Biochemistry, The University of Arizona, Tucson, Arizona 85721, United States
| | - Dennis L. Lichtenberger
- Department of Chemistry and Biochemistry, The University of Arizona, Tucson, Arizona 85721, United States
| | - M. Angeles Paz-Sandoval
- Departamento de Quı́mica, Cinvestav, Av. IPN #
2508, Col. San Pedro Zacatenco, México
D. F. 07360, México
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41
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Sun Y, Chen H. Performance of Density Functionals for Activation Energies of Zr-Mediated Reactions. J Chem Theory Comput 2013; 9:4735-43. [DOI: 10.1021/ct400432x] [Citation(s) in RCA: 54] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Affiliation(s)
- Yuanyuan Sun
- Beijing National
Laboratory for Molecular Sciences (BNLMS), CAS Key Laboratory of Photochemistry,
Institute of Chemistry, Chinese Academy of Sciences, Beijing, 100190, China
| | - Hui Chen
- Beijing National
Laboratory for Molecular Sciences (BNLMS), CAS Key Laboratory of Photochemistry,
Institute of Chemistry, Chinese Academy of Sciences, Beijing, 100190, China
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42
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Dang LX, Annapureddy HVR. Computational studies of water exchange around aqueous Li+ with polarizable potential models. J Chem Phys 2013; 139:084506. [DOI: 10.1063/1.4819135] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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43
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Feigl A, Chiorescu I, Deller K, Heidsieck SUH, Buchner MR, Karttunen V, Bockholt A, Genest A, Rösch N, Rieger B. Metal-Free Polymerization of Phenylsilane: Tris(pentafluorophenyl)borane-Catalyzed Synthesis of Branched Polysilanes at Elevated Temperatures. Chemistry 2013; 19:12526-36. [DOI: 10.1002/chem.201203139] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2012] [Revised: 05/29/2013] [Indexed: 11/05/2022]
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44
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Wu Y, Karttunen VA, Parker S, Genest A, Rösch N. Olefin Hydrosilylation Catalyzed by a Bis-N-Heterocyclic Carbene Rhodium Complex. A Density Functional Theory Study. Organometallics 2013. [DOI: 10.1021/om301236n] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Yin Wu
- Catalysis
Research Center and Wacker-Institut für Siliciumchemie, Technische Universität München, 85747 Garching, Germany
| | - Virve A. Karttunen
- Catalysis
Research Center and Wacker-Institut für Siliciumchemie, Technische Universität München, 85747 Garching, Germany
| | - Shane Parker
- Catalysis
Research Center and Wacker-Institut für Siliciumchemie, Technische Universität München, 85747 Garching, Germany
| | - Alexander Genest
- Catalysis
Research Center and Wacker-Institut für Siliciumchemie, Technische Universität München, 85747 Garching, Germany
- Institute of High Performance Computing, Agency for Science, Technology and Research, 1 Fusionopolis Way, #16-16 Connexis, Singapore 138632, Singapore
| | - Notker Rösch
- Catalysis
Research Center and Wacker-Institut für Siliciumchemie, Technische Universität München, 85747 Garching, Germany
- Institute of High Performance Computing, Agency for Science, Technology and Research, 1 Fusionopolis Way, #16-16 Connexis, Singapore 138632, Singapore
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45
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Rolla GA, Platas-Iglesias C, Botta M, Tei L, Helm L. 1H and 17O NMR relaxometric and computational study on macrocyclic Mn(II) complexes. Inorg Chem 2013; 52:3268-79. [PMID: 23437979 DOI: 10.1021/ic302785m] [Citation(s) in RCA: 66] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Abstract
Herein we report a detailed 1H and 17O relaxometric investigation of Mn(II) complexes with cyclen-based ligands such as 2-(1,4,7,10-tetraazacyclododecan-1-yl)acetic acid (DO1A), 2,2'-(1,4,7,10-tetraazacyclododecane-1,4-diyl)diacetic acid (1,4-DO2A), 2,2'-(1,4,7,10-tetraazacyclododecane-1,7-diyl)diacetic acid (1,7-DO2A), and 2,2',2"-(1,4,7,10-tetraazacyclododecane-1,4,7-triyl)triacetic acid (DO3A). The Mn(II) complex with the heptadentate ligand DO3A does not have inner sphere water molecules (q = 0), and therefore, the metal ion is most likely seven-coordinate. The hexadentate DO2A ligand has two isomeric forms: 1,7-DO2A and 1,4-DO2A. The Mn(II) complex with 1,7-DO2A is predominantly six-coordinate (q = 0). In aqueous solutions of [Mn(1,4-DO2A)], a species with one coordinated water molecule (q = 1) prevails largely, whereas a q = 0 form represents only about 10% of the overall population. The Mn(II) complex of the pentadentate ligand DO1A also contains a coordinated water molecule. DFT calculations (B3LYP model) are used to obtain information about the structure of this family of closely related complexes in solution, as well as to determine theoretically the 17O and 1H hyperfine coupling constants responsible for the scalar contribution to 17O and 1H NMR relaxation rates and 17O NMR chemical shifts. These calculations provide 17O A/ħ values of ca. 40 × 10(6) rad s(-1), in good agreement with experimental data. The [Mn(1,4-DO2A)(H2O)] complex is endowed with a relatively fast water exchange rate (k(ex)298 = 11.3 × 10(8) s(-1)) in comparison to the [Mn(EDTA)(H2O)]2- analogue (k(ex)298 = 4.7 × 10(8) s(-1)), but about 5 times lower than that of the [Mn(DO1A)(H2O)]+ complex (k(ex)298 = 60 × 10(8) s(-1)). The water exchange rate measured for the latter complex represents the highest water exchange rate ever measured for a Mn(II) complex.
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Affiliation(s)
- Gabriele A Rolla
- Dipartimento di Scienze e Innovazione Tecnologica, Università del Piemonte Orientale Amedeo Avogadro, Viale T. Michel 11, 15121, Alessandria, Italy
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46
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Efremenko I, Neumann R. Computational insight into the initial steps of the Mars-van Krevelen mechanism: electron transfer and surface defects in the reduction of polyoxometalates. J Am Chem Soc 2012; 134:20669-80. [PMID: 23210519 DOI: 10.1021/ja308625q] [Citation(s) in RCA: 47] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Metal oxides as a rule oxidize and oxygenate substrates via the Mars-van Krevelen mechanism. A well-defined α-Keggin polyoxometalate, H(5)PV(2)Mo(10)O(40), can be viewed as an analogue of discrete structure that reacts via the Mars-van Krevelen mechanism both in solution and in the gas phase. Guided by previous experimental observations, we have studied the key intermediates on the reaction pathways of its reduction by various compounds using high-level DFT calculations. These redox reactions of polyoxometalates require protons, and thus such complexes were explicitly considered. First, the energetics of outer-sphere proton and electron transfer as well as coupled proton and electron transfer were calculated for seven substrates. This was followed by identification of possible key intermediates on the subsequent reaction pathways that feature displacement of the metal atom from the Keggin structure and coordinatively unsaturated sites on the H(5)PV(2)Mo(10)O(40) surface. Such metal defects are favored at vanadium sites. For strong reducing agents the initial outer-sphere electron transfer, alone or possibly coupled with proton transfer, facilitates formation of metal defects. Subsequent coordination allows for formation of reactive ensembles on the catalyst surface, for which the selective oxygen-transfer step becomes feasible. Weak reducing agents do not facilitate defect formation by outer-sphere electron and/or proton transfers, and thus formation of metal defect structures prior to the substrate activation is suggested as an initial step. Calculated geometries and energies of metal defect structures support experimentally observed intermediates and demonstrate the complex nature of the Mars-van Krevelen mechanism.
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Affiliation(s)
- Irena Efremenko
- Department of Organic Chemistry, Weizmann Institute of Science, Rehovot 76100, Israel
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47
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Dos Santos HF, Paschoal D, Burda JV. Exploring the Potential Energy Surface for the Interaction of Sterically Hindered Trichloro(diethylenetriamine)gold(III) Complexes with Water. J Phys Chem A 2012; 116:11015-24. [DOI: 10.1021/jp307977p] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Hélio F. Dos Santos
- NEQC: Núcleo
de Estudos em Química Computacional, Departamento de Química−ICE, Universidade Federal e Juiz de Fora, 36036-330 Juiz
de Fora, MG, Brazil
| | - Diego Paschoal
- NEQC: Núcleo
de Estudos em Química Computacional, Departamento de Química−ICE, Universidade Federal e Juiz de Fora, 36036-330 Juiz
de Fora, MG, Brazil
| | - Jaroslav V. Burda
- Department
of Chemical Physics and Optics, Faculty of Mathematics and Physics, Charles University, Ke Karlovu 3, 121 16 Prague 2,
Czech Republic
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48
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Aono S, Sakaki S. Evaluation Procedure of Electrostatic Potential in 3D-RISM-SCF Method and Its Application to Hydrolyses of Cis- and Transplatin Complexes. J Phys Chem B 2012; 116:13045-62. [DOI: 10.1021/jp307879j] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Affiliation(s)
- Shinji Aono
- Fukui Institute for Fundamental Chemistry, Kyoto University, Nishiraki-cho, Takano, Sakyao-ku,
Kyoto606-8103, Japan
| | - Shigeyoshi Sakaki
- Fukui Institute for Fundamental Chemistry, Kyoto University, Nishiraki-cho, Takano, Sakyao-ku,
Kyoto606-8103, Japan
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49
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Walther M, Budimir A, Puchta R. Water exchange on beryllium complexes: part VIII – influence of neutral electron pair donors. J COORD CHEM 2012. [DOI: 10.1080/00958972.2012.739284] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Affiliation(s)
- Markus Walther
- a Department of Chemistry and Pharmacy , University of Erlangen-Nürnberg – Egerlandstraße 1 – 91058 Erlangen , Germany
- b Department of Chemistry and Pharmacy, Computer Chemistry Center , University of Erlangen-Nürnberg , Nägelsbachstr. 25, 91052 Erlangen , Germany
| | - Ana Budimir
- c Faculty of Pharmacy and Biochemistry , University of Zagreb , A. Kovačića 1 – 10000 Zagreb , Croatia
| | - Ralph Puchta
- a Department of Chemistry and Pharmacy , University of Erlangen-Nürnberg – Egerlandstraße 1 – 91058 Erlangen , Germany
- b Department of Chemistry and Pharmacy, Computer Chemistry Center , University of Erlangen-Nürnberg , Nägelsbachstr. 25, 91052 Erlangen , Germany
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50
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Dos Santos HF, Paschoal D, Burda JV. Exploring the potential energy surface for interaction of a trichloro(diethylenetriamine)gold(III) complex with strong nucleophiles. Chem Phys Lett 2012. [DOI: 10.1016/j.cplett.2012.07.080] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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