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He Y, Wen Z, Nie W, Yang L. Mechanistic Study of B(C 6F 5) 3-Catalyzed Transfer Hydrogenation of Aldehydes/Ketones with PhSiH 3 and Stoichiometric Water. ACS OMEGA 2024; 9:341-350. [PMID: 38222538 PMCID: PMC10785341 DOI: 10.1021/acsomega.3c05388] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/24/2023] [Revised: 10/24/2023] [Accepted: 11/27/2023] [Indexed: 01/16/2024]
Abstract
A DFT study was performed on the mechanisms of B(C6F5)3-catalyzed transfer hydrogenation of aldehydes/ketones, using PhSiH3 and stoichiometric water. Path B2 includes a stepwise Piers SN2-Si process, H- transfer, and hydrolysis desilylation of siloxane, in which the hydrolysis desilylation step is rate-determining. Path C1 is first determined, involving a B(C6F5)3-catalyzed concerted addition step of 2H2O to carbonyl generating R1R2C(OH)2, a subsequent SN2-Si dehydroxylation step of R1R2C(OH)2 giving R1R2C=OH+ and (C6F5)3B-H-, and final H- transfer producing the respective alcohol R1R2CHOH. A B(C6F5)3-catalyzed H2 generation process (Path H0) is determined. Path B2 is the only mechanism for the stepwise method. Using a one-time one-pot feeding method, alkyl/aryl aldehydes, dialkyl ketones, and alkyl aryl ketones (1a-g) can be reduced into alcohols chemoselectively and effectively at room temperature. More than 1 equiv of water over substrates is necessary. Herein, Path C1 is the dominant transfer hydrogenation pathway, and the H2 generation is efficiently inhibited, by the competitive advantage of Path C1 and initial dominant existence of the complexes IM0 and IM1-x. The diaryl ketones (1h,1i) cannot be efficiently reduced into the respective alcohols using the one-time feeding one-pot method. The barriers of C-TS1-h/i are obviously higher than those of C-TS1-a-g, attributed to the electron-donating and space effects of the two aryls on carbonyl C. The possible Paths B2 and C1 of transfer hydrogenation have no competitive advantage with Path H0. The DFT results are consistent with the experiments.
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Affiliation(s)
- Yunqing He
- Sichuan
Province Engineering Technology Research Center of Oil Cinnamon and Key Lab of Process
Analysis and Control of Sichuan Universities, Yibin University, Yibin 644000, Sichuan, People’s Republic of China
| | - Zhiguo Wen
- Leshan Engineering Research Center for Medicinal Components
of Characteristic
AgroProducts and Leshan West Silicon Materials Photovoltaic and New Energy Industry
Technology research Institute, Leshan Normal
University, Leshan 614000, Sichuan, People’s Republic of China
| | - Wanli Nie
- Department
of Material Science, Shenzhen MSU-BIT University, Shenzhen 518172, Guangdong, People’s
Republic of China
| | - Li Yang
- Faculty of
Materials and Chemical Engineering, Yibin
University, Yibin 644000, Sichuan, People’s Republic of China
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2
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Balduf T, Blakemore JD, Caricato M. Computational Insights into the Influence of Ligands on Hydrogen Generation with [Cp*Rh] Hydrides. J Phys Chem A 2023. [PMID: 37436832 DOI: 10.1021/acs.jpca.3c02550] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/14/2023]
Abstract
This work reports a computational investigation of the effect of ancillary ligands on the activity of an Rh catalyst for hydrogen evolution based on the [Cp*Rh] motif (Cp* = η5-pentamethylcyclopentadienyl). Specifically, we investigate why a bipyridyl (bpy) ligand leads to H2 generation but diphenylphosphino-based (dpp) ligands do not. We compare the full ligands to simplified models and systematically vary structural features to ascertain their effect on the reaction energy of each catalytic step. The calculations based on density functional theory show that the main effect on reactivity is the choice of linker atom, followed by its coordination. In particular, P stabilizes the intermediate Rh-hydride species by donating electron density to the Rh, thus inhibiting the reaction toward H2 generation. Conversely, N, a more electron-withdrawing center, favors H2 generation at the price of destabilizing the hydride intermediate, which cannot be isolated experimentally and makes determining the mechanism of this reaction more difficult. We also find that the steric effects of bulky substituents on the main ligand scaffold can lead to large effects on the reactivity, which may be challenging to fine-tune. On the other hand, structural features like the bite angle of the bidentate ligand have a much smaller impact on reactivity. Therefore, we propose that the choice of linker atom is key for the catalytic activity of this species, which can be further fine-tuned by a proper choice of electron-directing groups on the ligand scaffold.
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Affiliation(s)
- Ty Balduf
- Department of Chemistry, University of Kansas, 1567 Irving Hill Road, Lawrence, Kansas 66045, United States
| | - James D Blakemore
- Department of Chemistry, University of Kansas, 1567 Irving Hill Road, Lawrence, Kansas 66045, United States
| | - Marco Caricato
- Department of Chemistry, University of Kansas, 1567 Irving Hill Road, Lawrence, Kansas 66045, United States
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3
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Liu SC, Zhu XR, Liu DY, Fang DC. DFT calculations in solution systems: solvation energy, dispersion energy and entropy. Phys Chem Chem Phys 2023; 25:913-931. [PMID: 36519338 DOI: 10.1039/d2cp04720a] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
DFT calculations of reaction mechanisms in solution have always been a hot topic, especially for transition-metal-catalyzed reactions. The calculation of solvation energy is performed using either the polarizable continuum model (PCM) or the universal solvation model SMD. The PCM calculation is very sensitive to the choice of atomic radii to form a cavity, where the self-consistent isodensity PCM (SCI-PCM) has been recognized as the best choice and our IDSCRF radii can provide a similar cavity. Moving from a gas-phase case to a solution case, dispersion energy and entropy should be carefully treated. The solvent-solute dispersion is also important in solution systems, and it should be calculated together with the solute dispersion. Only half of the solvent-solute dispersion energy from the PCM calculation belongs to the solute molecules to maintain a thermal equilibrium between a solute molecule and its cavity, similar to the treatment of electrostatic energy. Relative solute dispersion energy should also be shared equally with the newly formed cavity. The entropy change from a gas phase to a liquid phase is quite large, but the modern quantum chemistry programs can only calculate the gas-phase translational entropy based on the idea-gas equation. In this review, we will provide an operable method to calculate the solution translational entropy, which has been coded in our THERMO program.
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Affiliation(s)
- Si-Cong Liu
- College of Chemistry, Beijing Normal University, Beijing 100875, China.
| | - Xin-Rui Zhu
- College of Chemistry, Beijing Normal University, Beijing 100875, China.
| | - Dan-Yang Liu
- College of Chemistry, Beijing Normal University, Beijing 100875, China.
| | - De-Cai Fang
- College of Chemistry, Beijing Normal University, Beijing 100875, China.
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4
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Ruccolo S, Sambade D, Shlian DG, Amemiya E, Parkin G. Catalytic reduction of carbon dioxide by a zinc hydride compound, [Tptm]ZnH, and conversion to the methanol level. Dalton Trans 2022; 51:5868-5877. [PMID: 35343979 DOI: 10.1039/d1dt04156h] [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
The zinc hydride compound, [Tptm]ZnH, may achieve the reduction of CO2 by (RO)3SiH (R = Me, Et) to the methanol oxidation level, (MeO)xSi(OR)4-x, via the formate species, HCO2Si(OR)3. However, because insertion of CO2 into the Zn-H bond is more facile than insertion of HCO2Si(OR)3, conversion of HCO2Si(OR)3 to the methanol level only occurs to a significant extent in the absence of CO2.
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Affiliation(s)
- Serge Ruccolo
- Department of Chemistry, Columbia University, New York, New York 10027, USA.
| | - David Sambade
- Department of Chemistry, Columbia University, New York, New York 10027, USA.
| | - Daniel G Shlian
- Department of Chemistry, Columbia University, New York, New York 10027, USA.
| | - Erika Amemiya
- Department of Chemistry, Columbia University, New York, New York 10027, USA.
| | - Gerard Parkin
- Department of Chemistry, Columbia University, New York, New York 10027, USA.
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5
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Theoretical study of nickel-catalyzed hydroalkylation of 3-pyrrolines: Origin of ligand-controlled regioselectivity. MOLECULAR CATALYSIS 2022. [DOI: 10.1016/j.mcat.2022.112238] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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6
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Jeon J, Lee C, Seo H, Hong S. NiH-Catalyzed Proximal-Selective Hydroamination of Unactivated Alkenes. J Am Chem Soc 2020; 142:20470-20480. [PMID: 33205955 DOI: 10.1021/jacs.0c10333] [Citation(s) in RCA: 60] [Impact Index Per Article: 15.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
Reported herein is a modular, NiH-catalyzed system capable of proximal-selective hydroamination of unactivated alkenes with diverse amine sources. The key to the successful implementation of this approach is the promotion of NiH insertion into even highly substituted olefins via coordination of the bidentate directing group to the nickel complex. A wide range of primary and secondary amines can be installed in both internal and terminal unactivated alkenes with excellent regiocontrol under the optimized reaction conditions. This protocol is flexible and general for the preparation of a variety of valuable β- and γ-amino acid building blocks that would otherwise be difficult to synthesize. The utility of this transformation was further demonstrated by the site-selective late-stage modification of complex and medicinally relevant molecules. Combined experimental and computational studies illuminate the detailed reaction mechanism.
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Affiliation(s)
- Jinwon Jeon
- Department of Chemistry, Korea Advanced Institute of Science and Technology, Daejeon 34141, Korea.,Center for Catalytic Hydrocarbon Functionalizations, Institute for Basic Science, Daejeon 34141, Korea
| | - Changseok Lee
- Department of Chemistry, Korea Advanced Institute of Science and Technology, Daejeon 34141, Korea.,Center for Catalytic Hydrocarbon Functionalizations, Institute for Basic Science, Daejeon 34141, Korea
| | - Huiyeong Seo
- Department of Chemistry, Korea Advanced Institute of Science and Technology, Daejeon 34141, Korea.,Center for Catalytic Hydrocarbon Functionalizations, Institute for Basic Science, Daejeon 34141, Korea
| | - Sungwoo Hong
- Department of Chemistry, Korea Advanced Institute of Science and Technology, Daejeon 34141, Korea.,Center for Catalytic Hydrocarbon Functionalizations, Institute for Basic Science, Daejeon 34141, Korea
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7
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Transition metal center effect on the mechanism of homogenous hydrogenation and dehydrogenation. Inorganica Chim Acta 2020. [DOI: 10.1016/j.ica.2020.119808] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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8
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Naweephattana P, Sawatlon B, Surawatanawong P. Insights into the Regioselectivity of Hydroheteroarylation of Allylbenzene with Pyridine Catalyzed by Ni/AlMe 3 with N-Heterocyclic Carbene: The Concerted Hydrogen Transfer Mechanism. J Org Chem 2020; 85:11340-11349. [PMID: 32786651 DOI: 10.1021/acs.joc.0c01449] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
The hydroheteroarylation of allylbenzene with pyridine as catalyzed by Ni/AlMe3 and a N-heterocyclic carbene ligand has recently been established. Density functional calculations revealed that the common stepwise pathway, which involves the C-H oxidative addition of pyridine-AlMe3 before the migratory insertion of allylbenzene, is unlikely as the migratory insertion needs to overcome a prohibitively high energy barrier. In contrast, the ligand-to-ligand hydrogen transfer pathway is more favorable in which the hydrogen is transferred directly from the para-position of pyridine-AlMe3 to C2 of allylbenzene. Our distortion-interaction analysis and natural bond orbital analysis indicate that the interaction energy is strongly correlated with the extent of the charge transfer from the alkene (hydrogen acceptor) to the pyridine-AlMe3 (hydrogen donor), which dictates the selectivity of the H-transfer to the C2 position of allylbenzene. Then, the subsequent C-C reductive elimination of the regioselective linear product is facilitated by the steric hindrance of the IPr ligand. Understanding these key factors affecting the product regioselectivity is important to the development of catalysts for hydroheteroarylation of alkenes.
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Affiliation(s)
- Phiphob Naweephattana
- Department of Chemistry and Center of Excellence for Innovation in Chemistry, Faculty of Science, Mahidol University, Bangkok 10400, Thailand
| | - Boodsarin Sawatlon
- Department of Chemistry and Center of Excellence for Innovation in Chemistry, Faculty of Science, Mahidol University, Bangkok 10400, Thailand
| | - Panida Surawatanawong
- Department of Chemistry and Center of Excellence for Innovation in Chemistry, Faculty of Science, Mahidol University, Bangkok 10400, Thailand.,Center of Sustainable Energy and Green Materials, Mahidol University, Salaya, Nakhon Pathom 73170, Thailand
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9
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Zhang B, Yang S, Zheng X, Ju YW, Chen BZ. Computational Study of Photocatalytic CO 2 Reduction by a Ni(II) Complex Bearing an S 2N 2-Type Ligand. Organometallics 2020. [DOI: 10.1021/acs.organomet.9b00801] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Beibei Zhang
- School of Chemical Sciences, University of Chinese Academy of Sciences, Beijing 100049, People’s Republic of China
| | - Suyu Yang
- School of Chemical Sciences, University of Chinese Academy of Sciences, Beijing 100049, People’s Republic of China
| | - Xiaofan Zheng
- School of Chemical Sciences, University of Chinese Academy of Sciences, Beijing 100049, People’s Republic of China
| | - Yi-wen Ju
- Key Laboratory of Computational Geodynamics, College of Earth and Planetary Sciences, University of Chinese Academy of Sciences, Beijing 100049, People’s Republic of China
| | - Bo-Zhen Chen
- School of Chemical Sciences, University of Chinese Academy of Sciences, Beijing 100049, People’s Republic of China
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10
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Zhang Q, Fukaya N, Fujitani T, Choi JC. Carbon Dioxide Hydrosilylation to Methane Catalyzed by Zinc and Other First-Row Transition Metal Salts. BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN 2019. [DOI: 10.1246/bcsj.20190203] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Affiliation(s)
- Qiao Zhang
- National Institute of Advanced Industrial Science and Technology (AIST), 1-1-1 Higashi, Tsukuba Central 5, Tsukuba, Ibaraki 305-8565, Japan
| | - Norihisa Fukaya
- National Institute of Advanced Industrial Science and Technology (AIST), 1-1-1 Higashi, Tsukuba Central 5, Tsukuba, Ibaraki 305-8565, Japan
| | - Tadahiro Fujitani
- National Institute of Advanced Industrial Science and Technology (AIST), 1-1-1 Higashi, Tsukuba Central 5, Tsukuba, Ibaraki 305-8565, Japan
| | - Jun-Chul Choi
- National Institute of Advanced Industrial Science and Technology (AIST), 1-1-1 Higashi, Tsukuba Central 5, Tsukuba, Ibaraki 305-8565, Japan
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11
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Chen J, McGraw M, Chen EYX. Diverse Catalytic Systems and Mechanistic Pathways for Hydrosilylative Reduction of CO 2. CHEMSUSCHEM 2019; 12:4543-4569. [PMID: 31386795 DOI: 10.1002/cssc.201901764] [Citation(s) in RCA: 40] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/29/2019] [Revised: 08/03/2019] [Indexed: 06/10/2023]
Abstract
Catalytic hydrosilylation of carbon dioxide has emerged as a promising approach for carbon dioxide utilization. It allows the reductive transformation of carbon dioxide into value-added products at the levels of formate, formaldehyde, methanol, and methane. Tremendous progress has been made in the area of carbon dioxide hydrosilylation since the first reports in 1981. This focus review describes recent advances in the design and catalytic performance of leading catalyst systems, including transition-metal, main-group, and transition-metal/main-group and main-group/main-group tandem catalysts. Emphasis is placed on discussions of key mechanistic features of these systems and efforts towards the development of more selective, efficient, and sustainable carbon dioxide hydrosilylation processes.
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Affiliation(s)
- Jiawei Chen
- Department of Chemistry, Columbia University, 3000 Broadway, New York, NY, 10027, USA
| | - Michael McGraw
- Department of Chemistry, Colorado State University, Fort Collins, CO, 80523, USA
| | - Eugene Y-X Chen
- Department of Chemistry, Colorado State University, Fort Collins, CO, 80523, USA
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12
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Singh V, Sakaki S, Deshmukh MM. Theoretical prediction of Ni(I)-catalyst for hydrosilylation of pyridine and quinoline. J Comput Chem 2019; 40:2119-2130. [PMID: 31184780 DOI: 10.1002/jcc.25864] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2019] [Revised: 04/26/2019] [Accepted: 05/02/2019] [Indexed: 12/14/2022]
Abstract
Catalytic synthesis of dihydropyridine by transition-metal complex is one of the important research targets, recently. Density functional theory calculations here demonstrate that nickel(I) hydride complex (bpy)NiI H (bpy = 2,2'-bipyridine) 1 is a good catalyst for hydrosilylation of both quinoline and pyridine. Two pathways are possible; in path 1, substrate reacts with 1 to form stable intermediate Int1. After that, N3 ─C1 bond of substrate inserts into Ni─H bond of 1 via TS1 to afford N-coordinated 1,2-dihydroquinoline Int2 with the Gibbs activation energy (ΔG°‡ ) of 21.8 kcal mol-1 . Then, Int2 reacts with hydrosilane to form hydrosilane σ-complex Int3; this is named path 1A. In the other route (path 1B), Int1 reacts with phenylsilane in a concerted manner via hydride-shuttle transition state TS2 to afford Int3. In TS2, Si atom takes hypervalent trigonal bipyramidal structure. Formation of hypervalent structure is crucial for stabilization of TS2 (ΔG°‡ = 17.3 kcal mol-1 ). The final step of path 1 is metathesis between Ni─N3 bond of Int3 and Si─H bond of PhSiH3 to afford N-silylated 1,2-dihydroproduct and regenerate 1 (ΔG°‡ = 4.5 kcal mol-1 ). In path 2, 1 reacts with hydrosilane to form Int5, which then forms adduct Int6 with substrate through Si-N interaction between substrate and PhSiH3 . Then, N-silylated 1,2-dihydroproduct is produced via hydride-shuttle transition state TS5 (ΔG°‡ = 18.8 kcal mol-1 ). The absence of N-coordination of substrate to NiI in TS5 is the reason why path 2 is less favorable than path 1B. Quinoline hydrosilylation occurs more easily than pyridine because quinoline has the lowest unoccupied molecular orbital at lower energy than that of pyridine. © 2019 Wiley Periodicals, Inc.
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Affiliation(s)
- Vijay Singh
- Department of Chemistry, Dr. Harisingh Gour Vishwavidyalaya (A Central University), Sagar, 470003, India
| | - Shigeyoshi Sakaki
- Fukui Institute for Fundamental Chemistry, Kyoto University, Nishihiraki-cho, Takano, Sakyo-ku, Kyoto, 606-8103, Japan
| | - Milind M Deshmukh
- Department of Chemistry, Dr. Harisingh Gour Vishwavidyalaya (A Central University), Sagar, 470003, India
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13
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Wang Y, Chen XM, Zhang LL, Liu CG. Jahn-Teller Distorted Effects To Promote Nitrogen Reduction over Keggin-Type Phosphotungstic Acid Catalysts: Insight from Density Functional Theory Calculations. Inorg Chem 2019; 58:7852-7862. [PMID: 31141350 DOI: 10.1021/acs.inorgchem.9b00537] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Molecular geometry, electronic structure, and possible reaction mechanism of a series of mono-transition-metal-substituted Keggin-type polyoxometalate (POM)-dinitrogen complexes [PW11O39M(N2)] n- (M = Cr, Mn, Fe, Co, Ni, Cu, Zn, Mo, Tc, Ru, Rh, Pd, Ag, Cd, W, Re, Os, Ir, Pt, Au, and Hg) have been investigated by using density functional theory (DFT) calculations with M06L functional. The calculated adsorption energy of N2 molecule, N-N bond length, N-N stretching frequency, and the NBO charge on the coordinated N2 moiety indicate that MoII-, TcII-, WII-, ReII-, and OsII-POM complexes are significant for binding and activation of the inert N2 molecule. The degree of the N2 activation can be classified into the "moderately activated" category according to Tuczek's sense [ J. Comput. Chem. 2006 , 27 , 1278 ]. Electronic structure and NBO analysis indicate that the terminal N atom of the coordinated N2 molecule in these POM-dinitrogen complexes possesses more negative charge relative to the bridge N atom because Jahn-Teller distorted effects lead to an effective orbital mixture between σ2s* orbital of N2 and d z2 orbital of transition metal center. And the mono-lacunary Keggin-type POM ligand with five oxygen donor atoms serves as a strong electron donor to the bivalent metal center. Meanwhile, a catalytic cycle for direct conversion of N2 into NH3 has been systematically investigated based on a Re-POM complex along distal, alternating, and enzymatic pathways. The calculated free energy profile of the three catalytic cycles indicates that the distal mechanism is the favorable pathway in the presence of proton and electron donors.
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Affiliation(s)
- Yu Wang
- State Key Laboratory for Chemistry and Molecular Engineering of Medicinal Resources, Ministry of Science and Technology of China, School of Chemistry and Pharmaceutical Sciences , Guangxi Normal University , 15 Yu Cai Road , Guilin 541004 , P. R. China.,College of Chemical Engineering , Northeast Electric Power University , Jilin City 132012 , P. R. China
| | - Xue-Mei Chen
- College of Chemical Engineering , Northeast Electric Power University , Jilin City 132012 , P. R. China
| | - Li-Long Zhang
- College of Chemical Engineering , Northeast Electric Power University , Jilin City 132012 , P. R. China
| | - Chun-Guang Liu
- State Key Laboratory for Chemistry and Molecular Engineering of Medicinal Resources, Ministry of Science and Technology of China, School of Chemistry and Pharmaceutical Sciences , Guangxi Normal University , 15 Yu Cai Road , Guilin 541004 , P. R. China.,College of Chemical Engineering , Northeast Electric Power University , Jilin City 132012 , P. R. China
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14
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Iglesias M, Fernández-Alvarez FJ, Oro LA. Non-classical hydrosilane mediated reductions promoted by transition metal complexes. Coord Chem Rev 2019. [DOI: 10.1016/j.ccr.2019.02.003] [Citation(s) in RCA: 29] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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15
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Nickel-catalysed selective migratory hydrothiolation of alkenes and alkynes with thiols. Nat Commun 2019; 10:1752. [PMID: 30988306 PMCID: PMC6465347 DOI: 10.1038/s41467-019-09783-w] [Citation(s) in RCA: 93] [Impact Index Per Article: 18.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2019] [Accepted: 03/27/2019] [Indexed: 11/26/2022] Open
Abstract
Direct (utilize easily available and abundant precursors) and selective (both chemo- and regio-) aliphatic C–H functionalization is an attractive mean with which to streamline chemical synthesis. With many possible sites of reaction, traditional methods often need an adjacent polar directing group nearby to achieve high regio- and chemoselectivity and are often restricted to a single site of functionalization. Here we report a remote aliphatic C–H thiolation process with predictable and switchable regioselectivity through NiH-catalysed migratory hydrothiolation of two feedstock chemicals (alkenes/alkynes and thiols). This mild reaction avoids the preparation of electrophilic thiolation reagents and is highly selective to thiols over other nucleophilic groups, such as alcohols, acids, amines, and amides. Mechanistic studies show that the reaction occurs through the formation of an RS-Bpin intermediate, and THF as the solvent plays an important role in the regeneration of NiH species. Construction of C–S bonds via C–H functionalization is an attractive route to organosulfur compounds. Here, the authors show the synergistic combination of NiH-catalysed alkene isomerization and subsequent thiolation to afford remote hydrothiolation products from alkenes (or alkynes) and thiols under mild conditions.
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16
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Biswas S, Pramanik A, Sarkar P. Computational Design of Quaterpyridine‐Based Fe/Mn–Complexes for the Direct Hydrogenation of CO
2
to HCOOH: A Direction for Atom‐Economic Approach. ChemistrySelect 2018. [DOI: 10.1002/slct.201800169] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Affiliation(s)
- Santu Biswas
- Department of ChemistryVisva-Bharati University Santiniketan- 731235 India
| | - Anup Pramanik
- Department of ChemistryVisva-Bharati University Santiniketan- 731235 India
| | - Pranab Sarkar
- Department of ChemistryVisva-Bharati University Santiniketan- 731235 India
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