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Moto JO, Adjieufack AI, Ndika Ngomb SC, D'ambassa GM, Djendo Mazia SL, Bikele DM. Deciphering the influence of Pd II and Pd IV oxidation states on non-standard chemical bonds within bis(jN-heterocyclic carbene) complexes: insights from DFT. RSC Adv 2024; 14:21075-21088. [PMID: 38962091 PMCID: PMC11221531 DOI: 10.1039/d4ra03893b] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2024] [Accepted: 06/18/2024] [Indexed: 07/05/2024] Open
Abstract
Bis-N-heterocyclic carbene ligands (bis(NHC)) have introduced a new approach to designing homogeneous and heterogeneous catalysts, demonstrating the versatility of ligand concepts in catalysis. This study presents a computational analysis of palladium (+ii and +iv) complexes containing either a normally (bis(nNHC)) or an abnormally (bis(aNHC)) bound CH2-bridged bis-N-heterocyclic carbene ligand; in addition, ancillary ligands are permuted from chlorides (X = Cl) to bromides (X = Br). Density functional theory at the B3PW91/6-31G(d)/Lanl2DZ level in the gas phase was used to investigate the electronic structure and bonding properties of bis(NHC)PdIIX2 and bis(NHC)PdIVX4 for bis(NHC) palladium(ii) dihalide and palladium(iv) tetrachloride complexes, respectively. Results indicate that all of the palladium complex structures prefer a flexible boat-type conformation with an average C 2v symmetry, according to bond property (Ccarbene-Pd and Pd-Cl[Br]) analysis. The strength of these bonds depends on coordinating halide ions (Cl- and Br-), the type of ligand (bis(nNHC) and bis(aNHC)), and the palladium oxidation state (+ii and +iv). Analysis of thermodynamic parameters (ΔH 0, ΔG 0, and ΔE bind) shows an increase in values from an abnormal to normal chelating mode in tetrahalides, whereas the opposite is observed for dihalide complexes. The lower π-backbonding ability of the metal, which is influenced by the quantity and size of halide ions involved, could be one possible explanation for this deficiency.
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Affiliation(s)
- Jean Ongagna Moto
- Computational and Theoretical Chemistry Unit, Department of Chemistry, Faculty of Science, University of Douala P.O. Box 24157 Douala Cameroon
| | - Abel Idrice Adjieufack
- Physical and Theoretical Chemistry Laboratory, University of Yaoundé I P.O. Box 812 Yaoundé Cameroon
| | - Simon Claude Ndika Ngomb
- Computational and Theoretical Chemistry Unit, Department of Chemistry, Faculty of Science, University of Douala P.O. Box 24157 Douala Cameroon
| | - Gaël Mouzong D'ambassa
- Computational and Theoretical Chemistry Unit, Department of Chemistry, Faculty of Science, University of Douala P.O. Box 24157 Douala Cameroon
| | - Suzane Leonie Djendo Mazia
- Computational and Theoretical Chemistry Unit, Department of Chemistry, Faculty of Science, University of Douala P.O. Box 24157 Douala Cameroon
| | - Désiré Mama Bikele
- Computational and Theoretical Chemistry Unit, Department of Chemistry, Faculty of Science, University of Douala P.O. Box 24157 Douala Cameroon
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Mohammadpour P, Safaei E, Mazarei E, Zeinalipour-Yazdi CD. TEMPO and a co-reductant mediated aerobic epoxidation of olefins using a new magnetically recoverable iron(III) bis(phenol)diamine complex: experimental and computational studies. Phys Chem Chem Phys 2023; 25:26588-26603. [PMID: 37753780 DOI: 10.1039/d3cp02254d] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/28/2023]
Abstract
A magnetically recoverable catalyst of an iron(III) bis(phenol) diamine complex immobilized onto amine functionalized silica-coated magnetic nanoparticles has been synthesized. The catalyst was characterized using FESEM, TEM and XRD which confirmed the nano structure of the catalyst. The physicochemical techniques of ICP, FT-IR, XPS, EDS and TGA proved the loading of the ligand and metal complex on silica-coated magnetic nanoparticles. Using the prepared heterogeneous catalyst, aerobic epoxidation reactions of different alkenes have been investigated in the presence of SO32- as a reducing agent. Moreover, using TEMPO (2,2,6,6-tetramethyl-1-piperidinyloxy) to discover the mechanism of the aerobic epoxidation of olefins, a new TEMPO-assisted route has been explored. Both of the reaction pathways led to a moderate to high percentage yield of epoxides in water at room temperature. For further understanding mechanistic aspects, density functional theory (DFT) computational studies have been performed. The DFT calculations confirm the suggested mechanism for the title reaction and show the electron density in the vicinity of Fe(II) in the presence of TEMPO as a co-catalyst was more than that in the presence of SO32-.
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Affiliation(s)
- Pegah Mohammadpour
- Department of Chemistry, College of Sciences, Shiraz University, Shiraz, 7194684795, Iran.
| | - Elham Safaei
- Department of Chemistry, College of Sciences, Shiraz University, Shiraz, 7194684795, Iran.
| | - Elham Mazarei
- Theoretical Chemistry, Institute of Chemistry, University of Potsdam, Karl-Liebknecht-Str. 24-25, 14476 Potsdam, Germany
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Malchau C, Ultes N, Ehrhard J, Eger TR, Fries DV, Oelkers B, Becker S, Niedner-Schatteburg G, Thiel WR. A novel chelating bidentate NHC ligand based on the cationic (η5-cyclopentadienyl)(η6-arene)iron(II) motif. J Organomet Chem 2023. [DOI: 10.1016/j.jorganchem.2023.122618] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
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4
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Methane Oxidation to Methyl Trifluoroacetate by Simple Anionic Palladium Catalyst: Comprehensive understanding of K2S2O8-based Methane Oxidation in CF3CO2H. J Catal 2022. [DOI: 10.1016/j.jcat.2022.07.031] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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5
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Ghatak K, Huynh HV. Palladium hetero‐di(N‐heterocyclic carbene) complexes and their catalytic activities in direct C−H arylation of heteroarenes. Appl Organomet Chem 2022. [DOI: 10.1002/aoc.6717] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Kausani Ghatak
- Department of Chemistry National University of Singapore Singapore
| | - Han Vinh Huynh
- Department of Chemistry National University of Singapore Singapore
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Neshat A, Mastrorilli P, Mousavizadeh Mobarakeh A. Recent Advances in Catalysis Involving Bidentate N-Heterocyclic Carbene Ligands. Molecules 2021; 27:95. [PMID: 35011327 PMCID: PMC8746573 DOI: 10.3390/molecules27010095] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2021] [Revised: 12/02/2021] [Accepted: 12/13/2021] [Indexed: 11/17/2022] Open
Abstract
Since the discovery of persistent carbenes by the isolation of 1,3-di-l-adamantylimidazol-2-ylidene by Arduengo and coworkers, we witnessed a fast growth in the design and applications of this class of ligands and their metal complexes. Modular synthesis and ease of electronic and steric adjustability made this class of sigma donors highly popular among chemists. While the nature of the metal-carbon bond in transition metal complexes bearing N-heterocyclic carbenes (NHCs) is predominantly considered to be neutral sigma or dative bonds, the strength of the bond is highly dependent on the energy match between the highest occupied molecular orbital (HOMO) of the NHC ligand and that of the metal ion. Because of their versatility, the coordination chemistry of NHC ligands with was explored with almost all transition metal ions. Other than the transition metals, NHCs are also capable of establishing a chemical bond with the main group elements. The advances in the catalytic applications of the NHC ligands linked with a second tether are discussed. For clarity, more frequently targeted catalytic reactions are considered first. Carbon-carbon coupling reactions, transfer hydrogenation of alkenes and carbonyl compounds, ketone hydrosilylation, and chiral catalysis are among highly popular reactions. Areas where the efficacy of the NHC based catalytic systems were explored to a lesser extent include CO2 reduction, C-H borylation, alkyl amination, and hydroamination reactions. Furthermore, the synthesis and applications of transition metal complexes are covered.
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Affiliation(s)
- Abdollah Neshat
- Department of Chemistry, Institute for Advanced Studies in Basic Sciences (IASBS), Zanjan 45137-66731, Iran;
| | - Piero Mastrorilli
- Dipartimento di Ingegneria Civile, Ambientale, del Territorio, Edile e di Chimica, Politecnico di Bari, Via Orabona, I-70125 Bari, Italy;
| | - Ali Mousavizadeh Mobarakeh
- Department of Chemistry, Institute for Advanced Studies in Basic Sciences (IASBS), Zanjan 45137-66731, Iran;
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The continuum of carbon-hydrogen (C-H) activation mechanisms and terminology. Commun Chem 2021; 4:173. [PMID: 36697593 PMCID: PMC9814233 DOI: 10.1038/s42004-021-00611-1] [Citation(s) in RCA: 45] [Impact Index Per Article: 15.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2021] [Accepted: 11/22/2021] [Indexed: 01/28/2023] Open
Abstract
As a rapidly growing field across all areas of chemistry, C-H activation/functionalisation is being used to access a wide range of important molecular targets. Of particular interest is the development of a sustainable methodology for alkane functionalisation as a means for reducing hydrocarbon emissions. This Perspective aims to give an outline to the community with respect to commonly used terminology in C-H activation, as well as the mechanisms that are currently understood to operate for (cyclo)alkane activation/functionalisation.
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Penn KR, Anders EJ, Lindsay VNG. Expedient Synthesis of Bis(imidazolium) Dichloride Salts and Bis(NHC) Complexes from Imidazoles Using DMSO as a Key Polar Additive. Organometallics 2021. [DOI: 10.1021/acs.organomet.1c00592] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Kyle R. Penn
- Department of Chemistry, North Carolina State University, 2620 Yarbrough Drive, Raleigh, North Carolina 27695, United States
| | - Evan J. Anders
- Department of Chemistry, North Carolina State University, 2620 Yarbrough Drive, Raleigh, North Carolina 27695, United States
| | - Vincent N. G. Lindsay
- Department of Chemistry, North Carolina State University, 2620 Yarbrough Drive, Raleigh, North Carolina 27695, United States
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Mandal T, Yadav S, Choudhury J. Steric effect of NHC ligands in Pd(II)–NHC-catalyzed non-directed C–H acetoxylation of simple arenes. J Organomet Chem 2021. [DOI: 10.1016/j.jorganchem.2021.122047] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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10
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Mandal T, Mondal M, Choudhury J. Hypercrosslinked Polymer Platform-Anchored Single-Site Heterogeneous Pd–NHC Catalysts for Diverse C–H Functionalization. Organometallics 2021. [DOI: 10.1021/acs.organomet.1c00182] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- Tanmoy Mandal
- Organometallics & Smart Materials Laboratory, Department of Chemistry, Indian Institute of Science Education and Research Bhopal, Bhopal 462 066, India
| | - Moumita Mondal
- Organometallics & Smart Materials Laboratory, Department of Chemistry, Indian Institute of Science Education and Research Bhopal, Bhopal 462 066, India
| | - Joyanta Choudhury
- Organometallics & Smart Materials Laboratory, Department of Chemistry, Indian Institute of Science Education and Research Bhopal, Bhopal 462 066, India
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Liu L, Fan W, Chen W, Chen X, Li S. KF-Promoted copper-catalyzed highly efficient and selective oxidation of methane and other alkanes with a dramatic additive effect. Catal Sci Technol 2021. [DOI: 10.1039/d1cy00474c] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
Abstract
Selective oxidation of methane is traditionally challenging. Now using KF could dramatic improve the efficiency of copper catalyzed methane oxidation with K2S2O8 as oxidant. The role of KF is conjectured to promote [SO4˙]− to escape the solvent cage.
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Affiliation(s)
- Luyao Liu
- School of Chemistry
- Sun Yat-Sen University
- Guangzhou 510275
- China
| | - Wu Fan
- Key Laboratory of Tobacco Flavor Basic Research
- Zhengzhou Tobacco Research Institute of CNTC
- Zhengzhou 450001
- China
| | - Wei Chen
- Department of Colorectal Surgery & Guangdong Provincial Key laboratory of Colorectal and Pelvic Floor Disease & Guangdong Research Institute of Gastroenterology
- The Sixth Affiliated Hospital of Sun Yat-Sen University
- Guangzhou 510655
- China
| | - Xiaoyan Chen
- School of Chemistry
- Sun Yat-Sen University
- Guangzhou 510275
- China
| | - Suhua Li
- School of Chemistry
- Sun Yat-Sen University
- Guangzhou 510275
- China
- Key Lab of Functional Molecular Engineering of Guangdong Province
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12
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Moto Ongagna J, Tamafo Fouegue AD, Ateba Amana B, Mouzong D'ambassa G, Zobo Mfomo J, Mbaze Meva'A L, Bikele Mama D. B3LYP, M06 and B3PW91 DFT assignment of nd 8 metal-bis-(N-heterocyclic carbene) complexes. J Mol Model 2020; 26:246. [PMID: 32827077 DOI: 10.1007/s00894-020-04500-7] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2020] [Accepted: 08/03/2020] [Indexed: 10/23/2022]
Abstract
This paper is focused on the examination of the bonding properties of a series of [M(NHC)2X2] (M = nd8 transition metal; X = Cl, Br and I) complexes in normal, abnormal and mixed C∩C coordination modes. Structures have been optimised in gas phase using B3LYP, M06 and P3BW91 functionals. Two basis sets have been used: the LanL2DZ and a mixed basis set (LanL2DZ for nd8 transition metals as well as halogen atoms and 6-311+G(d,p) for other atoms). Results obtained indicate that the B3PW91 bond distances are closer to experimental data. The complexation energies obtained for each binding mode increase in the order: Ni2+ < Pd2+ < Pt2+, independently of the halogen atom adopted. From the Quantum Theory of Atoms in Molecule (QTAIM) approach, the instability has been found to follow this trend: M - X < M - C. The analysis of metal-ligand interactions using the natural bond orbital (NBO) revealed that the strongest metal-ligand interactions are observed in the normal binding mode. The NCH → MX2 donation terms were found to be interestingly predominant compared with back donation ones in the complexes studied, except in Pt chloride ones. The contribution of electrostatic interaction energy between the above fragments (∆Eelstat term) is in the range 57.48-63.95% traducing the fact that the interactions are mostly electrostatic. Graphical abstract.
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Affiliation(s)
- Jean Moto Ongagna
- Computational and Theoretical Chemistry Unit, Department of Chemistry, Faculty of Science, University of Douala, P.O. Box 24157, Douala, Cameroon
| | - Aymard Didier Tamafo Fouegue
- Department of Chemistry, Higher Teacher Training College Bertoua, University of Ngaoundere, P.O Box. 652, Bertoua, Cameroon
| | - Baruch Ateba Amana
- Computational and Theoretical Chemistry Unit, Department of Chemistry, Faculty of Science, University of Douala, P.O. Box 24157, Douala, Cameroon
| | - Gaël Mouzong D'ambassa
- Computational and Theoretical Chemistry Unit, Department of Chemistry, Faculty of Science, University of Douala, P.O. Box 24157, Douala, Cameroon
| | - Joseph Zobo Mfomo
- Department of Forestry and Wood Engineering, Advanced Training College for Technical Education, University of Douala, Douala, Cameroon
| | - Luc Mbaze Meva'A
- Computational and Theoretical Chemistry Unit, Department of Chemistry, Faculty of Science, University of Douala, P.O. Box 24157, Douala, Cameroon
| | - Désiré Bikele Mama
- Computational and Theoretical Chemistry Unit, Department of Chemistry, Faculty of Science, University of Douala, P.O. Box 24157, Douala, Cameroon.
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13
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Longevial JF, Lo M, Lebrun A, Laurencin D, Clément S, Richeter S. Molecular complexes and main-chain organometallic polymers based on Janus bis(carbenes) fused to metalloporphyrins. Dalton Trans 2020; 49:7005-7014. [PMID: 32186566 DOI: 10.1039/d0dt00594k] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Janus bis(N-heterocyclic carbenes) composed of a porphyrin core with two N-heterocyclic carbene (NHC) heads fused to opposite pyrroles were used as bridging ligands for the preparation of metal complexes. We first focused our attention on the synthesis of gold(i) chloride complexes [(NHC)AuCl] and investigated the substitution of the chloride ligand by acetylides to obtain the corresponding [(NHC)AuC[triple bond, length as m-dash]CR] complexes. Polyacetylides were then used to obtain molecular multiporphyrinic systems with porphyrins fused to only one NHC ligand, while main-chain organometallic polymers (MCOPs) were obtained when using Janus porphyrin bis(NHCs). Interestingly, MCOPs incorporating zinc(ii) porphyrins proved to be efficient as heterogeneous photocatalysts for the generation of singlet oxygen upon visible light irradiation.
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Affiliation(s)
- Jean-François Longevial
- ICGM, Univ Montpellier, CNRS, ENSCM, CC 1701, Campus Triolet, Place Eugène Bataillon, Montpellier, France.
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Abstract
The synthesis and characterization of a series of homoleptic iron complexes [Fe(benzNHCOCO)2]2-/1-/0/1+ supported by the tridentate bis-aryloxide benzimidazolin-2-ylidene pincer ligand benzNHCOCO2- (II) is presented. While the reaction of 2 equiv of free ligand II with a ferrous iron precursor leads to the isolation of the coordination polymer [Fe(benzNHCOCOK)2]n (1), treatment of II with ferric iron salts allows for the synthesis and isolation of the mononuclear, octahedral bis-pincer compound K[Fe(benzNHCOCO)2] (2) and its crown-ether derivative [K(18c6)(THF)2][Fe(benzNHCOCO)2] (3). Electrochemical studies of 2 suggested stable products upon further one- and two-electron oxidation. Hence, treatment of 2 with 1 equiv of AgPF6 yields the charge-neutral species [Fe(benzNHCOCO)2] (4). Similarly, the cationic complex [Fe(benzNHCOCO)2]PF6 (5) is obtained by addition of 2 equiv of AgPF6. The characterization of complexes 1, 3, and 4 reveals iron-centered reduction and oxidation processes; thus, preserving the dianionic, closed-shell structure of both coordinated benzNHCOCO pincer chelates, II. This implies a stabilization of a highly Lewis acidic iron(IV) center by four phenolate anions rather than charge distribution across the ligand framework with a lower formal oxidation state at iron. Notably, the overall charge-neutral iron(IV) complex undergoes reductive elimination of the pincer ligand, providing a metal-free compound that can be described as a spirocyclic imidazolone ketal (6). In contrast, the ligand-metal bonds in 5, formally an iron(V) complex, are considerably covalent, rendering the assignment of its oxidation state challenging, if not impossible. All compounds are fully characterized, and the complexes' electronic structures were studied with a variety of spectroscopic and computational methods, including single-crystal X-ray diffraction (SC-XRD), X-band electron paramagnetic resonance (EPR), and zero-field 57Fe Mössbauer spectroscopy, variable-field and variable-temperature superconducting quantum interference device (SQUID) magnetization measurements, and multi-reference ab initio (NEVPT2/CASSCF) as well as density functional theory (DFT) studies. Taken altogether, the electronic structure of 5 is best described as an iron(IV) center antiferromagnetically coupled to a ligand-centered radical.
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Affiliation(s)
- Lisa Gravogl
- Department of Chemistry and Pharmacy, Inorganic Chemistry, Friedrich-Alexander University Erlangen-Nürnberg, Egerlandstraße 1, 91058 Erlangen, Germany
| | - Frank W Heinemann
- Department of Chemistry and Pharmacy, Inorganic Chemistry, Friedrich-Alexander University Erlangen-Nürnberg, Egerlandstraße 1, 91058 Erlangen, Germany
| | - Dominik Munz
- Department of Chemistry and Pharmacy, Inorganic Chemistry, Friedrich-Alexander University Erlangen-Nürnberg, Egerlandstraße 1, 91058 Erlangen, Germany
| | - Karsten Meyer
- Department of Chemistry and Pharmacy, Inorganic Chemistry, Friedrich-Alexander University Erlangen-Nürnberg, Egerlandstraße 1, 91058 Erlangen, Germany
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Chepaikin EG, Menchikova GN, Pomogailo SI. Homogeneous catalytic systems for the oxidative functionalization of alkanes: design, oxidants, and mechanisms. Russ Chem Bull 2019. [DOI: 10.1007/s11172-019-2581-5] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
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16
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Combination of Chemo- and Biocatalysis: Conversion of Biomethane to Methanol and Formic Acid. APPLIED SCIENCES-BASEL 2019. [DOI: 10.3390/app9142798] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
In the present day, methanol is mainly produced from methane via reforming processes, but research focuses on alternative production routes. Herein, we present a chemo-/biocatalytic oxidation cascade as a novel process to currently available methods. Starting from synthetic biogas, in the first step methane was oxidized to formaldehyde over a mesoporous VOx/SBA-15 catalyst. In the second step, the produced formaldehyde was disproportionated enzymatically towards methanol and formic acid in equimolar ratio by formaldehyde dismutase (FDM) obtained from Pseudomonas putida. Two processing routes were demonstrated: (a) batch wise operation using free formaldehyde dismutase after accumulating formaldehyde from the first step and (b) continuous operation with immobilized enzymes. Remarkably, the chemo-/biocatalytic oxidation cascades generate methanol in much higher productivity compared to methane monooxygenase (MMO) which, however, directly converts methane. Moreover, production steps for the generation of formic acid were reduced from four to two stages.
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Schroeter F, Císařová I, Soellner J, Herdtweck E, Strassner T. Electron-poor hemilabile dicationic palladium NHC complexes - synthesis, structure and catalytic activity. Dalton Trans 2018; 47:16638-16650. [PMID: 30421765 DOI: 10.1039/c8dt03373k] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
We present a new class of dicationic palladium NHC complexes with two carbene ligands bearing different aryl substituents and a hemilabile pyrimidyl group. They can either be synthesized from the imidazolium salts via the silver transmetalation route to a halide-free palladium(ii) precursor or by direct deprotonation by palladium acetate. For four complexes we could determine their solid-state structures by X-ray diffraction experiments. Insight gained by NMR spectroscopy and DFT calculations revealed that in solution the two potentially bidentate ligands interchange between chelating and non-chelating coordination modes. The preference of these coordination modes is governed by the steric influence of the different ligands. The complexes were shown to be active catalysts for the hydroarylation of alkynes, and their performance was rationalized by DFT calculations.
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Affiliation(s)
- Felix Schroeter
- Fakultät Chemie und Lebensmittelchemie, TU Dresden, 01062 Dresden, Germany.
| | - Ivana Císařová
- Charles University Prague, Department of Inorganic Chemistry, Hlavova 2030/8, 12843 Prague 2, Czech Republic
| | - Johannes Soellner
- Fakultät Chemie und Lebensmittelchemie, TU Dresden, 01062 Dresden, Germany.
| | - Eberhardt Herdtweck
- Molecular Catalysis, Catalysis Research Center and Department of Chemistry, Technische Universität München, Lichtenbergstraße 4, 85747 Garching bei München, Germany
| | - Thomas Strassner
- Fakultät Chemie und Lebensmittelchemie, TU Dresden, 01062 Dresden, Germany.
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Gardiner MG, Ho CC. Recent advances in bidentate bis(N-heterocyclic carbene) transition metal complexes and their applications in metal-mediated reactions. Coord Chem Rev 2018. [DOI: 10.1016/j.ccr.2018.02.003] [Citation(s) in RCA: 52] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
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Scattolin T, Canovese L, Visentin F, Santo C, Demitri N. Synthesis and characterization of novel olefin complexes of palladium(0) with chelating bis(N-heterocyclic carbenes) as spectator ligands. Polyhedron 2018. [DOI: 10.1016/j.poly.2018.08.007] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Liu JQ, Gou XX, Han YF. Chelating Bis(N-Heterocyclic Carbene) Palladium-Catalyzed Reactions. Chem Asian J 2018; 13:2257-2276. [DOI: 10.1002/asia.201800583] [Citation(s) in RCA: 30] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2018] [Revised: 06/02/2018] [Indexed: 11/09/2022]
Affiliation(s)
- Ji-Quan Liu
- Key Laboratory of Synthetic and Natural Functional Molecule Chemistry; College of Chemistry and Materials Science; Northwest University; Xi'an 710127 P.R. China
| | - Xing-Xing Gou
- Key Laboratory of Synthetic and Natural Functional Molecule Chemistry; College of Chemistry and Materials Science; Northwest University; Xi'an 710127 P.R. China
| | - Ying-Feng Han
- Key Laboratory of Synthetic and Natural Functional Molecule Chemistry; College of Chemistry and Materials Science; Northwest University; Xi'an 710127 P.R. China
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21
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Propane CH activation by palladium complexes bearing ligands with Charge-shift bonding characteristics: A DFT study. COMPUT THEOR CHEM 2017. [DOI: 10.1016/j.comptc.2017.06.004] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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22
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Lee E, Lee J, Yandulov DV. On the Mechanism of the Oxidative Cleavage of N‐Heterocyclic‐Carbene–Palladium Bonds with Iodine. Eur J Inorg Chem 2017. [DOI: 10.1002/ejic.201700034] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Eunsung Lee
- Department of Chemistry Stanford University 94305‐5080 Stanford CA USA
- Center for Self‐assembly and Complexity (CSC) Institute for Basic Science (IBS) 790‐784 Pohang Republic of Korea
- Department of Chemistry and Division of Advanced Materials Science Pohang University of Science and Technology 790‐784 Pohang Republic of Korea
| | - Jaechul Lee
- Center for Self‐assembly and Complexity (CSC) Institute for Basic Science (IBS) 790‐784 Pohang Republic of Korea
- Department of Chemistry and Division of Advanced Materials Science Pohang University of Science and Technology 790‐784 Pohang Republic of Korea
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23
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Mondal M, Joji J, Choudhury J. Designing a heterogeneous Pd(ii)–NHC-based C–H activation catalyst on a self-supported coordination polymer platform. Chem Commun (Camb) 2017; 53:3185-3188. [DOI: 10.1039/c6cc09935a] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
An extended RuII(terpy)2-based coordination polymer provides a potential scaffold to design a self-supported, single-site PdII(NHC) oxidative catalyst for challenging reactions such as selective arene monohalogenation with enhanced catalytic activity compared to the homogeneous counterpart.
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Affiliation(s)
- Moumita Mondal
- Organometallics and Smart Materials Laboratory
- Indian Institute of Science Education and Research Bhopal
- Bhopal 462 066
- India
| | - Jinu Joji
- Organometallics and Smart Materials Laboratory
- Indian Institute of Science Education and Research Bhopal
- Bhopal 462 066
- India
| | - Joyanta Choudhury
- Organometallics and Smart Materials Laboratory
- Indian Institute of Science Education and Research Bhopal
- Bhopal 462 066
- India
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24
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Webster-Gardiner MS, Piszel PE, Fu R, McKeown BA, Nielsen RJ, Goddard WA, Gunnoe TB. Electrophilic RhI catalysts for arene H/D exchange in acidic media: Evidence for an electrophilic aromatic substitution mechanism. ACTA ACUST UNITED AC 2017. [DOI: 10.1016/j.molcata.2016.07.045] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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25
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Kondratenko EV, Peppel T, Seeburg D, Kondratenko VA, Kalevaru N, Martin A, Wohlrab S. Methane conversion into different hydrocarbons or oxygenates: current status and future perspectives in catalyst development and reactor operation. Catal Sci Technol 2017. [DOI: 10.1039/c6cy01879c] [Citation(s) in RCA: 161] [Impact Index Per Article: 23.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
This Perspective highlights recent developments in methane conversion into different hydrocarbons and C1-oxygenates. Our analysis identified possible directions for further research to bring the above approaches to a commercial level.
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Affiliation(s)
| | - Tim Peppel
- Leibniz-Institut für Katalyse e.V. an der Universität Rostock
- D-18059 Rostock
- Germany
| | - Dominik Seeburg
- Leibniz-Institut für Katalyse e.V. an der Universität Rostock
- D-18059 Rostock
- Germany
| | - Vita A. Kondratenko
- Leibniz-Institut für Katalyse e.V. an der Universität Rostock
- D-18059 Rostock
- Germany
| | - Narayana Kalevaru
- Leibniz-Institut für Katalyse e.V. an der Universität Rostock
- D-18059 Rostock
- Germany
| | - Andreas Martin
- Leibniz-Institut für Katalyse e.V. an der Universität Rostock
- D-18059 Rostock
- Germany
| | - Sebastian Wohlrab
- Leibniz-Institut für Katalyse e.V. an der Universität Rostock
- D-18059 Rostock
- Germany
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26
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He J, Wasa M, Chan KSL, Shao Q, Yu JQ. Palladium-Catalyzed Transformations of Alkyl C-H Bonds. Chem Rev 2016; 117:8754-8786. [PMID: 28697604 DOI: 10.1021/acs.chemrev.6b00622] [Citation(s) in RCA: 1463] [Impact Index Per Article: 182.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
This Review summarizes the advancements in Pd-catalyzed C(sp3)-H activation via various redox manifolds, including Pd(0)/Pd(II), Pd(II)/Pd(IV), and Pd(II)/Pd(0). While few examples have been reported in the activation of alkane C-H bonds, many C(sp3)-H activation/C-C and C-heteroatom bond forming reactions have been developed by the use of directing group strategies to control regioselectivity and build structural patterns for synthetic chemistry. A number of mono- and bidentate ligands have also proven to be effective for accelerating C(sp3)-H activation directed by weakly coordinating auxiliaries, which provides great opportunities to control reactivity and selectivity (including enantioselectivity) in Pd-catalyzed C-H functionalization reactions.
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Affiliation(s)
- Jian He
- Department of Chemistry, The Scripps Research Institute , 10550 N. Torrey Pines Road, La Jolla, California 92037, United States
| | - Masayuki Wasa
- Department of Chemistry, The Scripps Research Institute , 10550 N. Torrey Pines Road, La Jolla, California 92037, United States
| | - Kelvin S L Chan
- Department of Chemistry, The Scripps Research Institute , 10550 N. Torrey Pines Road, La Jolla, California 92037, United States
| | - Qian Shao
- Department of Chemistry, The Scripps Research Institute , 10550 N. Torrey Pines Road, La Jolla, California 92037, United States
| | - Jin-Quan Yu
- Department of Chemistry, The Scripps Research Institute , 10550 N. Torrey Pines Road, La Jolla, California 92037, United States
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27
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Neutral platinum(II) N-heterocyclic carbene complexes with tetrazolide-tethered imidazolin-2-ylidene ligands. J Organomet Chem 2016. [DOI: 10.1016/j.jorganchem.2016.04.027] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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28
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Lee E, Bae DY, Park S, Oliver AG, Kim Y, Yandulov DV. A Palladium(II) Peroxido Complex Supported by the Smallest Steric N‐Heterocyclic Carbene,
I
Me = 1,3‐Dimethylimidazole‐2‐ylidene, and Its Reactivity by Oxygen‐Atom Transfer. Eur J Inorg Chem 2016. [DOI: 10.1002/ejic.201601019] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Eunsung Lee
- Department of Chemistry Stanford University 94305‐5080 Stanford CA USA
- Center for Self‐assembly and Complexity (CSC) Institute for Basic Science (IBS) 790‐784 Pohang Republic of Korea
- Department of Chemistry and Division of Advanced Materials Science Pohang University of Science and Technology 790‐784 Pohang Republic of Korea
| | - Dae Young Bae
- Center for Self‐assembly and Complexity (CSC) Institute for Basic Science (IBS) 790‐784 Pohang Republic of Korea
- Department of Chemistry and Division of Advanced Materials Science Pohang University of Science and Technology 790‐784 Pohang Republic of Korea
| | - Sungho Park
- Center for Self‐assembly and Complexity (CSC) Institute for Basic Science (IBS) 790‐784 Pohang Republic of Korea
| | - Allen G. Oliver
- Department of Chemistry and Biochemistry University of Notre Dame 46556 Notre Dame IN USA
| | - Yonghwi Kim
- Center for Self‐assembly and Complexity (CSC) Institute for Basic Science (IBS) 790‐784 Pohang Republic of Korea
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29
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Bolbat E, Wendt OF. Ligand Control in Selective C-H Oxidative Functionalization Using Pd-PEPPSI-Type Complexes. European J Org Chem 2016. [DOI: 10.1002/ejoc.201600322] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Affiliation(s)
- Ekaterina Bolbat
- Centre for Analysis and Synthesis; Department of Chemistry; Lund University; P. O. Box 124 22100 Lund Sweden
| | - Ola F. Wendt
- Centre for Analysis and Synthesis; Department of Chemistry; Lund University; P. O. Box 124 22100 Lund Sweden
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30
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Munz D, Wang D, Moyer MM, Webster-Gardiner MS, Kunal P, Watts D, Trewyn BG, Vedernikov AN, Gunnoe TB. Aerobic Epoxidation of Olefin by Platinum Catalysts Supported on Mesoporous Silica Nanoparticles. ACS Catal 2016. [DOI: 10.1021/acscatal.6b01532] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Affiliation(s)
- Dominik Munz
- Department
of Chemistry, University of Virginia, Charlottesville, Virginia 22904, United States
| | - Daoyong Wang
- Department
of Chemistry and Biochemistry, University of Maryland, College Park, Maryland 20742, United States
| | - Megan M. Moyer
- Department
of Chemistry, Colorado School of Mines, Golden, Colorado 80401, United States
| | | | - Pranaw Kunal
- Department
of Chemistry, Colorado School of Mines, Golden, Colorado 80401, United States
| | - David Watts
- Department
of Chemistry and Biochemistry, University of Maryland, College Park, Maryland 20742, United States
| | - Brian G. Trewyn
- Department
of Chemistry, Colorado School of Mines, Golden, Colorado 80401, United States
| | - Andrei N. Vedernikov
- Department
of Chemistry and Biochemistry, University of Maryland, College Park, Maryland 20742, United States
| | - T. Brent Gunnoe
- Department
of Chemistry, University of Virginia, Charlottesville, Virginia 22904, United States
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31
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Desai SP, Mondal M, Choudhury J. Chelating Bis-N-heterocyclic Carbene–Palladium(II) Complexes for Oxidative Arene C–H Functionalization. Organometallics 2015. [DOI: 10.1021/om501163m] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Affiliation(s)
- Sai Puneet Desai
- Organometallics & Smart Materials Laboratory, Department of Chemistry, Indian Institute of Science Education and Research Bhopal, Bhauri, Bhopal By-pass Road, Bhopal 462 066, India
| | - Moumita Mondal
- Organometallics & Smart Materials Laboratory, Department of Chemistry, Indian Institute of Science Education and Research Bhopal, Bhauri, Bhopal By-pass Road, Bhopal 462 066, India
| | - Joyanta Choudhury
- Organometallics & Smart Materials Laboratory, Department of Chemistry, Indian Institute of Science Education and Research Bhopal, Bhauri, Bhopal By-pass Road, Bhopal 462 066, India
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32
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33
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Vinogradov MM, Shul'pina LS, Kozlov YN, Kudinov AR, Ikonnikov NS, Shul'pin GB. Oxidation of hydrocarbons and alcohols with peroxides catalyzed by new π-cymene osmium complexes. J Organomet Chem 2015. [DOI: 10.1016/j.jorganchem.2014.07.026] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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34
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Munz D, Strassner T. Alkane C-H functionalization and oxidation with molecular oxygen. Inorg Chem 2015; 54:5043-52. [PMID: 25822853 DOI: 10.1021/ic502515x] [Citation(s) in RCA: 68] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
The application of environmentally benign, cheap, and economically viable oxidation procedures is a key challenge of homogeneous, oxidative alkane functionalization. The typically harsh reaction conditions and the propensity of dioxygen for radical reactivity call for extraordinary robust catalysts. Mainly three strategies have been applied. These are (1) the combination of a catalyst responsible for C-H activation with a cocatalyst responsible for dioxygen activation, (2) transition-metal catalysts, which react with both hydrocarbons and molecular oxygen, and (3) the introduction of very robust main-group element catalysts for C-H functionalization chemistry. Herein, these three approaches will be assessed and exemplified by the reactivity of chelated palladium (N-heterocyclic carbene) catalysts in combination with a vanadium cocatalyst, the methane functionalization by cobalt catalysts, and the reaction of group XVII compounds with alkanes.
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Affiliation(s)
- Dominik Munz
- Physikalische Organische Chemie, Technische Universität Dresden, 01069 Dresden, Germany
| | - Thomas Strassner
- Physikalische Organische Chemie, Technische Universität Dresden, 01069 Dresden, Germany
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35
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Aksenov AV, Smirnov AN, Aksenov NA, Bijieva AS, Aksenova IV, Rubin M. Benzimidazoles and benzoxazoles via the nucleophilic addition of anilines to nitroalkanes. Org Biomol Chem 2015; 13:4289-95. [PMID: 25758157 DOI: 10.1039/c5ob00131e] [Citation(s) in RCA: 42] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
PPA-induced umpolung triggers efficient nucleophilic addition of unactivated anilines to nitroalkanes to produce N-hydroxyimidamides. The latter undergo sequential acid-promoted cyclocondensation with ortho-OH or ortho-NHR moieties to afford benzoxazoles and benzimidazoles, respectively.
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Affiliation(s)
- Alexander V Aksenov
- Department of Chemistry, North Caucasus Federal University, 1a Pushkin St., Stavropol 355009, Russian Federation.
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36
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37
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Kalman SE, Munz D, Fortman GC, Boaz NC, Groves JT, Gunnoe TB. Partial oxidation of light alkanes by periodate and chloride salts. Dalton Trans 2015; 44:5294-8. [DOI: 10.1039/c5dt00558b] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The efficient and selective partial oxidation of light alkanes using potassium periodate and potassium chloride is reported.
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Affiliation(s)
| | - Dominik Munz
- Department of Chemistry
- University of Virginia
- Charlottesville
- USA
| | | | - Nicholas C. Boaz
- Department of Chemistry and Princeton Institute for the Science and Technology of Materials
- Princeton University
- Princeton
- USA
| | - John T. Groves
- Department of Chemistry and Princeton Institute for the Science and Technology of Materials
- Princeton University
- Princeton
- USA
| | - T. Brent Gunnoe
- Department of Chemistry
- University of Virginia
- Charlottesville
- USA
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38
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Jagadeesan R, Velmurugan G, Venuvanalingam P. The nature of Pd–carbene and Pd–halogen bonds in (bisNHC)PdX2 type catalysts: insights from density functional theory. RSC Adv 2015. [DOI: 10.1039/c5ra16500h] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Pd–carbene and Pd–halogen play a key role in the catalytic activity of (bisNHC)PdX2 complexes and they can be fine-tuned with proper substitution in the carbene moiety and choosing a weakly coordinating halide ion.
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Affiliation(s)
- Rajangam Jagadeesan
- Theoretical and Computational Chemistry Laboratory
- School of Chemistry
- Bharathidasan University
- Tiruchirappalli – 620 024
- India
| | - Gunasekaran Velmurugan
- Theoretical and Computational Chemistry Laboratory
- School of Chemistry
- Bharathidasan University
- Tiruchirappalli – 620 024
- India
| | - Ponnambalam Venuvanalingam
- Theoretical and Computational Chemistry Laboratory
- School of Chemistry
- Bharathidasan University
- Tiruchirappalli – 620 024
- India
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39
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Pinter P, Biffis A, Tubaro C, Tenne M, Kaliner M, Strassner T. Palladium(ii) complexes with electron-poor, 4,5-disubstituted diimidazol-2-ylidene ligands: synthesis, characterization and catalytic activity. Dalton Trans 2015; 44:9391-9. [DOI: 10.1039/c5dt01067e] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
Palladium(ii) complexes with N-heterocyclic dicarbene ligands featuring electron-withdrawing substituents have been prepared and tested as catalysts in alkyne hydroarylations.
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Affiliation(s)
- Piermaria Pinter
- Dipartimento di Scienze Chimiche
- Università di Padova
- 35131 Padova
- Italy
| | - Andrea Biffis
- Dipartimento di Scienze Chimiche
- Università di Padova
- 35131 Padova
- Italy
| | - Cristina Tubaro
- Dipartimento di Scienze Chimiche
- Università di Padova
- 35131 Padova
- Italy
| | - Mario Tenne
- Fachrichtung Chemie und Lebensmittelchemie
- Technische Universität Dresden
- 01069 Dresden
- Germany
| | - Maria Kaliner
- Fachrichtung Chemie und Lebensmittelchemie
- Technische Universität Dresden
- 01069 Dresden
- Germany
| | - Thomas Strassner
- Fachrichtung Chemie und Lebensmittelchemie
- Technische Universität Dresden
- 01069 Dresden
- Germany
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40
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Webster-Gardiner MS, Fu R, Fortman GC, Nielsen RJ, Gunnoe TB, Goddard III WA. Arene C–H activation using Rh(i) catalysts supported by bidentate nitrogen chelates. Catal Sci Technol 2015. [DOI: 10.1039/c4cy00972j] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Abstract
New Rh(i) complexes as precursors to efficient catalytic arene C–H activation in trifluoroacetic acid.
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Affiliation(s)
| | - Ross Fu
- Materials and Process Simulation Center
- Dept of Chemistry
- California Institute of Technology
- Pasadena
- USA
| | | | - Robert J. Nielsen
- Materials and Process Simulation Center
- Dept of Chemistry
- California Institute of Technology
- Pasadena
- USA
| | - T. Brent Gunnoe
- Department of Chemistry
- University of Virginia
- Charlottesville
- USA
| | - William A. Goddard III
- Materials and Process Simulation Center
- Dept of Chemistry
- California Institute of Technology
- Pasadena
- USA
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41
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Vinogradov MM, Kozlov YN, Bilyachenko AN, Nesterov DS, Shul'pina LS, Zubavichus YV, Pombeiro AJL, Levitsky MM, Yalymov AI, Shul'pin GB. Alkane oxidation with peroxides catalyzed by cage-like copper(ii) silsesquioxanes. NEW J CHEM 2015. [DOI: 10.1039/c4nj01163e] [Citation(s) in RCA: 42] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Copper(ii) silsesquioxanes [(PhSiO1.5)12(CuO)4(NaO0.5)4] or [(PhSiO1.5)10(CuO)2(NaO0.5)2] are catalysts for alkane oxidation with H2O2ort-BuOOH.
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Affiliation(s)
- Mikhail M. Vinogradov
- Nesmeyanov Institute of Organoelement Compounds
- Russian Academy of Sciences
- Moscow 119991
- Russia
- Centro de Química Estrutural
| | - Yuriy N. Kozlov
- Semenov Institute of Chemical Physics
- Russian Academy of Sciences
- Moscow 119991
- Russia
| | - Alexey N. Bilyachenko
- Nesmeyanov Institute of Organoelement Compounds
- Russian Academy of Sciences
- Moscow 119991
- Russia
| | - Dmytro S. Nesterov
- Centro de Química Estrutural
- Complexo I
- Instituto Superior Técnico
- Universidade de Lisboa
- 1049-001 Lisboa
| | - Lidia S. Shul'pina
- Nesmeyanov Institute of Organoelement Compounds
- Russian Academy of Sciences
- Moscow 119991
- Russia
| | - Yan V. Zubavichus
- Nesmeyanov Institute of Organoelement Compounds
- Russian Academy of Sciences
- Moscow 119991
- Russia
- National Research Center “Kurchatov Institute”
| | - Armando J. L. Pombeiro
- Centro de Química Estrutural
- Complexo I
- Instituto Superior Técnico
- Universidade de Lisboa
- 1049-001 Lisboa
| | - Mikhail M. Levitsky
- Nesmeyanov Institute of Organoelement Compounds
- Russian Academy of Sciences
- Moscow 119991
- Russia
| | - Alexey I. Yalymov
- Nesmeyanov Institute of Organoelement Compounds
- Russian Academy of Sciences
- Moscow 119991
- Russia
| | - Georgiy B. Shul'pin
- Semenov Institute of Chemical Physics
- Russian Academy of Sciences
- Moscow 119991
- Russia
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42
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Munz D, Webster-Gardiner M, Fu R, Strassner T, Goddard WA, Gunnoe TB. Proton or Metal? The H/D Exchange of Arenes in Acidic Solvents. ACS Catal 2014. [DOI: 10.1021/cs501620f] [Citation(s) in RCA: 50] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Affiliation(s)
- Dominik Munz
- Department of Chemistry, University of Virginia, Charlottesville, Virginia 22904, United States
| | | | - Ross Fu
- Materials and Process Simulation Center, California Institute of Technology, Pasadena, California 91125, United States
| | - Thomas Strassner
- Physikalische Organische Chemie, Technische Universität Dresden, 01069 Dresden, Germany
| | - William A. Goddard
- Materials and Process Simulation Center, California Institute of Technology, Pasadena, California 91125, United States
| | - T. Brent Gunnoe
- Department of Chemistry, University of Virginia, Charlottesville, Virginia 22904, United States
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43
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Allolio C, Strassner T. Palladium Complexes with Chelating Bis-NHC Ligands in the Mizoroki–Heck Reaction—Mechanism and Electronic Effects, a DFT Study. J Org Chem 2014; 79:12096-105. [DOI: 10.1021/jo501897s] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Affiliation(s)
- Christoph Allolio
- Physikalische Organische
Chemie, Technische Universität Dresden, 01062 Dresden, Germany
| | - Thomas Strassner
- Physikalische Organische
Chemie, Technische Universität Dresden, 01062 Dresden, Germany
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44
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O’Reilly ME, Pahls DR, Cundari TR, Gunnoe TB. Reductive Functionalization of a Rhodium(III)–Methyl Bond in Acidic Media: Key Step in the Electrophilic Functionalization of Methane. Organometallics 2014. [DOI: 10.1021/om5008456] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
Affiliation(s)
- Matthew E. O’Reilly
- Department
of Chemistry, University of Virginia, Charlottesville, Virginia 22904-4319, United States
| | - Dale R. Pahls
- Department
of Chemistry and Center for Advanced Scientific Computing and Modeling, University of North Texas, Denton, Texas 76203-5017, United States
| | - Thomas R. Cundari
- Department
of Chemistry and Center for Advanced Scientific Computing and Modeling, University of North Texas, Denton, Texas 76203-5017, United States
| | - T. Brent Gunnoe
- Department
of Chemistry, University of Virginia, Charlottesville, Virginia 22904-4319, United States
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45
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C2-Symmetric normal and mesoionic bis-N-heterocyclic carbenes with biphenyl backbone. A comparison of bis(1,2,3-triazol-5-ylidene) and bis(imidazol-2-ylidene) ligands. J Organomet Chem 2014. [DOI: 10.1016/j.jorganchem.2014.06.023] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
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46
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Munz D, Strassner T. On the Mechanism of the Palladium Bis(NHC) Complex Catalyzed CH Functionalization of Propane: Experiment and DFT Calculations. Chemistry 2014; 20:14872-9. [DOI: 10.1002/chem.201403910] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2014] [Indexed: 11/07/2022]
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48
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Zhong R, Pöthig A, Haslinger S, Hofmann B, Raudaschl-Sieber G, Herdtweck E, Herrmann WA, Kühn FE. Toward Tunable Immobilized Molecular Catalysts: Functionalizing the Methylene Bridge of Bis(N-heterocyclic carbene) Ligands. Chempluschem 2014. [DOI: 10.1002/cplu.201402135] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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49
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Bonney KJ, Schoenebeck F. Experiment and computation: a combined approach to study the reactivity of palladium complexes in oxidation states 0 toiv. Chem Soc Rev 2014; 43:6609-38. [DOI: 10.1039/c4cs00061g] [Citation(s) in RCA: 123] [Impact Index Per Article: 12.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
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50
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Teci M, Brenner E, Matt D, Gourlaouen C, Toupet L. Directional properties of fluorenylidene moieties in unsymmetrically substituted N-heterocyclic carbenes. Unexpected CH activation of a methylfluorenyl group with palladium. Use in palladium catalysed Suzuki–Miyaura cross coupling of aryl chlorides. Dalton Trans 2014; 43:12251-62. [DOI: 10.1039/c4dt01102c] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
The confining properties of N-heterocyclic carbenes with alkylfluorenyl substituents have been investigated.
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Affiliation(s)
- Matthieu Teci
- Laboratoire de Chimie Inorganique Moléculaire et Catalyse
- Institut de Chimie (UMR 7177 CNRS)
- Université de Strasbourg
- F-67008 Strasbourg Cedex, France
| | - Eric Brenner
- Laboratoire de Chimie Inorganique Moléculaire et Catalyse
- Institut de Chimie (UMR 7177 CNRS)
- Université de Strasbourg
- F-67008 Strasbourg Cedex, France
| | - Dominique Matt
- Laboratoire de Chimie Inorganique Moléculaire et Catalyse
- Institut de Chimie (UMR 7177 CNRS)
- Université de Strasbourg
- F-67008 Strasbourg Cedex, France
| | - Christophe Gourlaouen
- Laboratoire de Chimie Quantique
- Institut de Chimie (UMR 7177 CNRS)
- Université de Strasbourg
- F-67008 Strasbourg, France
| | - Loïc Toupet
- Institut de Physique de Rennes
- UMR 6251 CNRS
- Université de Rennes 1
- Rennes cedex, France
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