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Mondal T, De S, Dutta S, Koley D. Mechanistic Exploration of the Transmetalation and Reductive Elimination Events Involving Pd IV -Abnormal NHC Complexes in Suzuki-Miyaura Coupling Reactions: A DFT Study. Chemistry 2018; 24:6155-6168. [PMID: 29411924 DOI: 10.1002/chem.201800024] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/03/2018] [Indexed: 12/25/2022]
Abstract
A comprehensive DFT (M06-L-D3(SMD)/BS2//M06-L/BS1 level) investigation has been carried out to explore in detail the mechanism of the transmetalation and reductive elimination reactions of abnormal N-heterocyclic carbene (aNHC) palladium(IV) complexes within the framework of Suzuki-Miyaura cross-coupling reactions. Emphasis was placed on the role of base and the effect of countercations on the critical transmetalation and reductive elimination events involving palladium(IV) complexes. Of the two competing roles of the base, the route involving boronate formation followed by halide exchange prevails over that of direct halide exchange for the intermediates [PdIV (aNHC)(OMe)2 Cl]- Na+ (pathway A), [PdIV (aNHC)(OMe)(Cl)2 ]- Na+ (pathway B), and [PdIV (aNHC)Cl3 ]- Na+ (pathway C) emanating from the oxidative addition reaction. The results of the calculations are in accordance with our previous theoretical findings of favorable energetics for palladium intermediates incorporating two coordinated methoxy groups. The negative role played by the countercation in the transmetalation step is mainly due to the overstabilization of the pre-transmetalation intermediate, which is in line with experimental kinetic results. The anionic complexes exhibit greater affinity for the transmetalation and reductive elimination reactions than the neutral variants.
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Affiliation(s)
- Totan Mondal
- Department of Chemical Sciences, Indian Institute of Science Education and Research (IISER) Kolkata, Mohanpur, 741 246, India
| | - Sriman De
- Department of Chemical Sciences, Indian Institute of Science Education and Research (IISER) Kolkata, Mohanpur, 741 246, India
| | - Sayan Dutta
- Department of Chemical Sciences, Indian Institute of Science Education and Research (IISER) Kolkata, Mohanpur, 741 246, India
| | - Debasis Koley
- Department of Chemical Sciences, Indian Institute of Science Education and Research (IISER) Kolkata, Mohanpur, 741 246, India
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Adsorption and diffusion of a silver atom and its cation on α-SiO2 (001): Comparison of a pure surface with a surface containing an Al defect. Chem Phys Lett 2013. [DOI: 10.1016/j.cplett.2013.02.067] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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Sharma M, Ariafard A, Canty AJ, Yates BF, Gardiner MG, Jones RC. Synthetic and computational studies of the palladium(iv) system Pd(alkyl)(aryl)(alkynyl)(bidentate)(triflate) exhibiting selectivity in C–C reductive elimination. Dalton Trans 2012; 41:11820-8. [DOI: 10.1039/c2dt31086d] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Ariafard A, Ejehi Z, Sadrara H, Mehrabi T, Etaati S, Moradzadeh A, Moshtaghi M, Nosrati H, Brookes NJ, Yates BF. Insight into the Mechanism of R−R Reductive Elimination from the Six-Coordinate d6 Complexes L2Pt(R)4 (R = vinyl, Me). Organometallics 2011. [DOI: 10.1021/om1005512] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Alireza Ariafard
- Department of Chemistry, Faculty of Science, Central Tehran Branch, Islamic Azad University, Shahrak Gharb, Tehran, Iran
| | - Zeinab Ejehi
- Department of Chemistry, Faculty of Science, Central Tehran Branch, Islamic Azad University, Shahrak Gharb, Tehran, Iran
| | - Hoda Sadrara
- Department of Chemistry, Faculty of Science, Central Tehran Branch, Islamic Azad University, Shahrak Gharb, Tehran, Iran
| | - Tahmineh Mehrabi
- Department of Chemistry, Faculty of Science, Central Tehran Branch, Islamic Azad University, Shahrak Gharb, Tehran, Iran
| | - Shohreh Etaati
- Department of Chemistry, Faculty of Science, Central Tehran Branch, Islamic Azad University, Shahrak Gharb, Tehran, Iran
| | - Azadeh Moradzadeh
- Department of Chemistry, Faculty of Science, Central Tehran Branch, Islamic Azad University, Shahrak Gharb, Tehran, Iran
| | - Mahshid Moshtaghi
- Department of Chemistry, Faculty of Science, Central Tehran Branch, Islamic Azad University, Shahrak Gharb, Tehran, Iran
| | - Hadis Nosrati
- Department of Chemistry, Faculty of Science, Central Tehran Branch, Islamic Azad University, Shahrak Gharb, Tehran, Iran
| | - Nigel J. Brookes
- School of Chemistry, University of Tasmania, Private Bag 75, Hobart, Tasmania 7001, Australia
| | - Brian F. Yates
- School of Chemistry, University of Tasmania, Private Bag 75, Hobart, Tasmania 7001, Australia
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Kirchner B, di Dio PJ, Hutter J. Real-world predictions from ab initio molecular dynamics simulations. Top Curr Chem (Cham) 2011; 307:109-53. [PMID: 21842358 DOI: 10.1007/128_2011_195] [Citation(s) in RCA: 66] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/03/2022]
Abstract
In this review we present the techniques of ab initio molecular dynamics simulation improved to its current stage where the analysis of existing processes and the prediction of further chemical features and real-world processes are feasible. For this reason we describe the relevant developments in ab initio molecular dynamics leading to this stage. Among them, parallel implementations, different basis set functions, density functionals, and van der Waals corrections are reported. The chemical features accessible through AIMD are discussed. These are IR, NMR, as well as EXAFS spectra, sampling methods like metadynamics and others, Wannier functions, dipole moments of molecules in condensed phase, and many other properties. Electrochemical reactions investigated by ab initio molecular dynamics methods in solution, on surfaces as well as complex interfaces, are also presented.
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Affiliation(s)
- Barbara Kirchner
- Wilhelm-Ostwald Institute of Physical and Theoretical Chemistry, University of Leipzig, Linnéstr. 2, 04103 Leipzig, Germany.
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Darses B, Milet A, Philouze C, Greene AE, Poisson JF. Ynol Ethers from Dichloroenol Ethers: Mechanistic Elucidation Through 35Cl Labeling. Org Lett 2008; 10:4445-7. [DOI: 10.1021/ol801704u] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Benjamin Darses
- Département de Chimie Moléculaire (SERCO), Université Joseph Fourier, UMR-5250, ICMG FR-2607, CNRS BP 53, 38041 Grenoble Cedex 9, France
| | - Anne Milet
- Département de Chimie Moléculaire (SERCO), Université Joseph Fourier, UMR-5250, ICMG FR-2607, CNRS BP 53, 38041 Grenoble Cedex 9, France
| | - Christian Philouze
- Département de Chimie Moléculaire (SERCO), Université Joseph Fourier, UMR-5250, ICMG FR-2607, CNRS BP 53, 38041 Grenoble Cedex 9, France
| | - Andrew E. Greene
- Département de Chimie Moléculaire (SERCO), Université Joseph Fourier, UMR-5250, ICMG FR-2607, CNRS BP 53, 38041 Grenoble Cedex 9, France
| | - Jean-François Poisson
- Département de Chimie Moléculaire (SERCO), Université Joseph Fourier, UMR-5250, ICMG FR-2607, CNRS BP 53, 38041 Grenoble Cedex 9, France
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