1
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Fosshat S, Siddhiaratchi SDM, Baumberger CL, Ortiz VR, Fronczek FR, Chambers MB. Light-Initiated C–H Activation via Net Hydrogen Atom Transfer to a Molybdenum(VI) Dioxo. J Am Chem Soc 2022; 144:20472-20483. [DOI: 10.1021/jacs.2c09235] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Saeed Fosshat
- Department of Chemistry, Louisiana State University, Baton Rouge, Louisiana 70803-1804, United States
| | | | - Courtney L. Baumberger
- Department of Chemistry, Louisiana State University, Baton Rouge, Louisiana 70803-1804, United States
| | - Victor R. Ortiz
- Department of Chemistry, Louisiana State University, Baton Rouge, Louisiana 70803-1804, United States
| | - Frank R. Fronczek
- Department of Chemistry, Louisiana State University, Baton Rouge, Louisiana 70803-1804, United States
| | - Matthew B. Chambers
- Department of Chemistry, Louisiana State University, Baton Rouge, Louisiana 70803-1804, United States
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2
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Dhimba G, Muller A, Lammertsma K. Racemization Pathway for MoO 2(acac) 2 Favored over Ray-Dutt, Bailar, and Conte-Hippler Twists. Inorg Chem 2022; 61:14918-14923. [PMID: 35980189 PMCID: PMC9516665 DOI: 10.1021/acs.inorgchem.2c00824] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2022] [Indexed: 11/28/2022]
Abstract
Chiral cis-MoO2(acac)2 racemizes via four pathways that agree with and extend upon Muetterties' topological analysis for dynamic MX2(chel)2 complexes. Textbook Ray-Dutt and Bailar twists are the least favored with barriers of 27.5 and 28.7 kcal/mol, respectively. Rotating both acac ligands of the Bailar structure by 90° gives the lower Conte-Hippler twist (20.0 kcal/mol), which represents a valley-ridge inflection that invokes the trans isomer. The most favorable is a new twist that was found by 90° rotation of only one acac ligand of the Bailar structure. The gas-phase barrier of 17.4 kcal/mol for this Dhimba-Muller-Lammertsma twist further decreases upon inclusion of the effects of solvents to 16.3 kcal/mol (benzene), 16.2 kcal/mol (toluene), and 15.4 kcal/mol (chloroform), which are in excellent agreement with the reported experimental values.
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Affiliation(s)
- George Dhimba
- Department
of Chemical Sciences, University of Johannesburg, Auckland Park, Johannesburg 2006, South Africa
| | - Alfred Muller
- Department
of Chemical Sciences, University of Johannesburg, Auckland Park, Johannesburg 2006, South Africa
| | - Koop Lammertsma
- Department
of Chemical Sciences, University of Johannesburg, Auckland Park, Johannesburg 2006, South Africa
- Department
of Chemistry and Pharmaceutical Sciences, Faculty of Sciences, Vrije Universiteit Amsterdam, De Boelelaan 1108, Amsterdam 1081 HZ, The Netherlands
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3
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Maurya MR, MAURYA SK, Kumar NR, Avecilla F, Gupta PRAM. Synthesis of Dioxidomolybdenum(VI) Complexes of N,N,N’,N’‐Tetrakis(2‐Hydroxyl‐3,5‐Disubstitutedbenzyl)‐1,2‐Diaminoethane, Their Trans‐metalation to Oxidovanadium(V) Complexes and catalytic Application. Eur J Inorg Chem 2022. [DOI: 10.1002/ejic.202200266] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Mannar R. Maurya
- Indian Institute of Technology Roorkee Department of Chemistry Indian Institute of Technology Roorkee 247 667 Roorkee INDIA
| | | | - Naveen Ram Kumar
- Indian Institute of Technology Roorkee Chemistry Department of Chemistry 247 667 Roorkee INDIA
| | | | - Puneet RAM Gupta
- Indian Institute of Technology Bombay Chemistry IIT Roorkee 247667 Roorkee INDIA
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4
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Rhenium-containing compound(PyHReO4): synthesis, characterization and catalytic application in olefin epoxidation and baeyer-villiger oxidation. J CHEM SCI 2021. [DOI: 10.1007/s12039-021-02000-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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5
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Photo-epoxidation of (α, β)-pinene with molecular O2 catalyzed by a dioxo-molybdenum (VI)-based Metal–Organic Framework. RESEARCH ON CHEMICAL INTERMEDIATES 2021. [DOI: 10.1007/s11164-021-04518-3] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
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6
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Selective oxidation of benzyl alcohols to benzaldehydes catalyzed by dioxomolybdenum Schiff base complex: synthesis, spectral characterization, crystal structure, theoretical and computational studies. TRANSIT METAL CHEM 2021. [DOI: 10.1007/s11243-021-00460-w] [Citation(s) in RCA: 19] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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7
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Jia AQ, Zhou WY, Wu SM, Shi HT, Zhang QF. Cis‐Dioxo‐molybdenum(VI) Complexes with Diaminoguanidinium and Triaminoguanidinium Schiff Bases and Their Catalytic Application for Epoxidation of Cyclohexene. ChemistrySelect 2020. [DOI: 10.1002/slct.202002938] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Ai Q. Jia
- Institute of Molecular Engineering and Applied Chemistry Anhui University of Technology Ma'anshan Anhui 243002 P. R. China
| | - Wen Y. Zhou
- Institute of Molecular Engineering and Applied Chemistry Anhui University of Technology Ma'anshan Anhui 243002 P. R. China
| | - Si M. Wu
- Institute of Molecular Engineering and Applied Chemistry Anhui University of Technology Ma'anshan Anhui 243002 P. R. China
| | - Hua T. Shi
- Institute of Molecular Engineering and Applied Chemistry Anhui University of Technology Ma'anshan Anhui 243002 P. R. China
| | - Qian F. Zhang
- Institute of Molecular Engineering and Applied Chemistry Anhui University of Technology Ma'anshan Anhui 243002 P. R. China
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8
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Al‐Hussein MF, Adam MSS. Catalytic evaluation of copper (II)
N
‐salicylidene‐amino acid Schiff base in the various catalytic processes. Appl Organomet Chem 2020. [DOI: 10.1002/aoc.5598] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Affiliation(s)
- Maryam F.I. Al‐Hussein
- Department of ChemistryCollege of Science King Faisal University, P.O. Box 380, Al Hofuf, Al Ahsa 31982 Saudi Arabia
| | - Mohamed Shaker S. Adam
- Department of ChemistryCollege of Science King Faisal University, P.O. Box 380, Al Hofuf, Al Ahsa 31982 Saudi Arabia
- Chemistry Department, Faculty of ScienceSohag University Sohag ‐82534 Egypt
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9
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Hossain MK, Köhntopp A, Haukka M, Richmond MG, Lehtonen A, Nordlander E. Cis- and trans molybdenum oxo complexes of a prochiral tetradentate aminophenolate ligand: Synthesis, characterization and oxotransfer activity. Polyhedron 2020. [DOI: 10.1016/j.poly.2019.114312] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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10
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Agarwal R, Liao Y, Lin DJ, Yang ZX, Lai CF, Chen CT. Enantiodivergent reduction of α-keto amides catalyzed by high valent, chiral oxido-vanadium(v) complexes. Org Chem Front 2020. [DOI: 10.1039/c9qo01304k] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Abstract
Complementary asymmetric reductions of N-benzyl-α-keto amides were achieved for the first time by an air and moisture stable, reduced form of vanadyl(v) N-salicylidene-t-leucinate with HBPin and HBCat with up to 99% and 90% ee, respectively.
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Affiliation(s)
- Rachit Agarwal
- Department of Chemistry
- National Tsing Hua University
- Hsinchu 30013
- Taiwan
| | - Yiya Liao
- Department of Chemistry
- National Tsing Hua University
- Hsinchu 30013
- Taiwan
| | - Dai-Jen Lin
- Department of Chemistry
- National Tsing Hua University
- Hsinchu 30013
- Taiwan
| | - Zhen-Xing Yang
- Department of Chemistry
- National Tsing Hua University
- Hsinchu 30013
- Taiwan
| | - Chien-Fu Lai
- Department of Chemistry
- National Tsing Hua University
- Hsinchu 30013
- Taiwan
| | - Chien-Tien Chen
- Department of Chemistry
- National Tsing Hua University
- Hsinchu 30013
- Taiwan
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11
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Julião D, Gomes AC, Cunha-Silva L, Pillinger M, Lopes AD, Valença R, Ribeiro JC, Gonçalves IS, Balula SS. Dichlorodioxomolybdenum(VI) complexes bearing oxygen-donor ligands as catalysts for oxidative desulfurization of simulated and real diesel. CATAL COMMUN 2019. [DOI: 10.1016/j.catcom.2019.05.011] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022] Open
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12
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Zhang M, Singh V, Hu X, Ma X, Lu J, Zhang C, Wang J, Niu J. Efficient Olefins Epoxidation on Ultrafine H2O–WOx Nanoparticles with Spectroscopic Evidence of Intermediate Species. ACS Catal 2019. [DOI: 10.1021/acscatal.9b01226] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Mengrui Zhang
- Henan Key Laboratory of Polyoxometalate Chemistry, Institute of Molecular and Crystal Engineering, College of Chemistry and Chemical Engineering, Henan University, Kaifeng, Henan 475004, P. R. China
| | - Vikram Singh
- Henan Key Laboratory of Polyoxometalate Chemistry, Institute of Molecular and Crystal Engineering, College of Chemistry and Chemical Engineering, Henan University, Kaifeng, Henan 475004, P. R. China
| | - Xuefu Hu
- Collaborative Innovation Center of Chemistry for Energy Materials, College of Chemistry and Chemical Engineering of Xiamen University, Xiamen 361005, P. R. China
| | - Xinyi Ma
- Henan Key Laboratory of Polyoxometalate Chemistry, Institute of Molecular and Crystal Engineering, College of Chemistry and Chemical Engineering, Henan University, Kaifeng, Henan 475004, P. R. China
| | - Jingkun Lu
- Henan Key Laboratory of Polyoxometalate Chemistry, Institute of Molecular and Crystal Engineering, College of Chemistry and Chemical Engineering, Henan University, Kaifeng, Henan 475004, P. R. China
| | - Chao Zhang
- Henan Key Laboratory of Polyoxometalate Chemistry, Institute of Molecular and Crystal Engineering, College of Chemistry and Chemical Engineering, Henan University, Kaifeng, Henan 475004, P. R. China
| | - Jingping Wang
- Henan Key Laboratory of Polyoxometalate Chemistry, Institute of Molecular and Crystal Engineering, College of Chemistry and Chemical Engineering, Henan University, Kaifeng, Henan 475004, P. R. China
| | - Jingyang Niu
- Henan Key Laboratory of Polyoxometalate Chemistry, Institute of Molecular and Crystal Engineering, College of Chemistry and Chemical Engineering, Henan University, Kaifeng, Henan 475004, P. R. China
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13
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SBA-16 supported amino acid Schiff base complexes of molybdenum as new heterogeneous molybdenum catalysts. Colloids Surf A Physicochem Eng Asp 2019. [DOI: 10.1016/j.colsurfa.2019.03.047] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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14
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Zwettler N, Ehweiner MA, Schachner JA, Dupé A, Belaj F, Mösch-Zanetti NC. Dioxygen Activation with Molybdenum Complexes Bearing Amide-Functionalized Iminophenolate Ligands. Molecules 2019; 24:molecules24091814. [PMID: 31083419 PMCID: PMC6539658 DOI: 10.3390/molecules24091814] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2019] [Revised: 05/07/2019] [Accepted: 05/09/2019] [Indexed: 01/18/2023] Open
Abstract
Two novel iminophenolate ligands with amidopropyl side chains (HL2 and HL3) on the imine functionality have been synthesized in order to prepare dioxidomolybdenum(VI) complexes of the general structure [MoO2L2] featuring pendant internal hydrogen bond donors. For reasons of comparison, a previously published complex featuring n-butyl side chains (L1) was included in the investigation. Three complexes (1–3) obtained using these ligands (HL1–HL3) were able to activate dioxygen in an in situ approach: The intermediate molybdenum(IV) species [MoO(PMe3)L2] is first generated by treatment with an excess of PMe3. Subsequent reaction with dioxygen leads to oxido peroxido complexes of the structure [MoO(O2)L2]. For the complex employing the ligand with the n-butyl side chain, the isolation of the oxidomolybdenum(IV) phosphino complex [MoO(PMe3)(L1)2] (4) was successful, whereas the respective Mo(IV) species employing the ligands with the amidopropyl side chains were found to be not stable enough to be isolated. The three oxido peroxido complexes of the structure [MoO(O2)L2] (9–11) were systematically compared to assess the influence of internal hydrogen bonds on the geometry as well as the catalytic activity in aerobic oxidation. All complexes were characterized by spectroscopic means. Furthermore, molecular structures were determined by single-crystal X-ray diffraction analyses of HL3, 1–3, 9–11 together with three polynuclear products {[MoO(L2)2]2(µ-O)} (7), {[MoO(L2)]4(µ-O)6} (8) and [C9H13N2O]4[Mo8O26]·6OPMe3 (12) which were obtained during the synthesis of reduced complexes of the type [MoO(PMe3)L2] (4–6).
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Affiliation(s)
- Niklas Zwettler
- Institute of Chemistry, Inorganic Chemistry, University of Graz, Schubertstrasse 1, 8010 Graz, Austria.
| | - Madeleine A Ehweiner
- Institute of Chemistry, Inorganic Chemistry, University of Graz, Schubertstrasse 1, 8010 Graz, Austria.
| | - Jörg A Schachner
- Institute of Chemistry, Inorganic Chemistry, University of Graz, Schubertstrasse 1, 8010 Graz, Austria.
| | - Antoine Dupé
- Institute of Chemistry, Inorganic Chemistry, University of Graz, Schubertstrasse 1, 8010 Graz, Austria.
| | - Ferdinand Belaj
- Institute of Chemistry, Inorganic Chemistry, University of Graz, Schubertstrasse 1, 8010 Graz, Austria.
| | - Nadia C Mösch-Zanetti
- Institute of Chemistry, Inorganic Chemistry, University of Graz, Schubertstrasse 1, 8010 Graz, Austria.
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15
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Wang SY, Dai JW, Chen HB, Zhou ZH. 2,2′-Bipyridine or 1,10-phenanthroline chelated oxomolybdenum(V) complexes with glycolate, lactate and malate in acidic media. Inorganica Chim Acta 2019. [DOI: 10.1016/j.ica.2019.03.013] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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16
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Catalytic epoxidation using dioxidomolybdenum(VI) complexes with tridentate aminoalcohol phenol ligands. Inorganica Chim Acta 2019. [DOI: 10.1016/j.ica.2018.10.012] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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17
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Nogueira LS, Neves P, Gomes AC, Amarante TA, Paz FAA, Valente AA, Gonçalves IS, Pillinger M. A Comparative Study of Molybdenum Carbonyl and Oxomolybdenum Derivatives Bearing 1,2,3-Triazole or 1,2,4-Triazoles in Catalytic Olefin Epoxidation. Molecules 2018; 24:molecules24010105. [PMID: 30597921 PMCID: PMC6337555 DOI: 10.3390/molecules24010105] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2018] [Revised: 12/21/2018] [Accepted: 12/23/2018] [Indexed: 11/18/2022] Open
Abstract
The molybdenum(0)-carbonyl-triazole complexes [Mo(CO)3(L)3] [L = 1,2,3-triazole (1,2,3-trz) or 1,2,4-triazole (1,2,4-trz)] have been prepared and examined as precursors to molybdenum(VI) oxide catalysts for the epoxidation of cis-cyclooctene. Reaction of the carbonyl complexes with the oxidant tert-butyl hydroperoxide (TBHP) (either separately or in situ) gives oxomolybdenum(VI) hybrid materials that are proposed to possess one-dimensional polymeric structures in which adjacent oxo-bridged dioxomolybdenum(VI) moieties are further linked by bidentate bridging triazole (trz) ligands. A pronounced ligand influence on catalytic performance was found and the best result (quantitative epoxide yield within 1 h at 70 °C) was obtained with the 1,2,3-triazole oxomolybdenum(VI) hybrid. Both molybdenum oxide-triazole compounds displayed superior catalytic performance in comparison with the known hybrid materials [MoO3(trz)0.5], which have different structures based on organic-inorganic perovskite-like layers. With aqueous H2O2 as the oxidant instead of TBHP, all compounds were completely soluble and active. A pronounced ligand influence on catalytic performance was only found for the hybrids [MoO3(trz)0.5], and only the 1,2,4-trz compound displayed reaction-induced self-precipitation behavior. An insight into the type of solution species that may be involved in the catalytic processes with these compounds was obtained by separately treating [MoO3(1,2,4-trz)0.5] with excess H2O2, which led to the crystallization of the complex (NH4)1.8(H3O)0.2[Mo2O2(μ2-O)(O2)4(1,2,4-trz)]·H2O. The single-crystal X-ray investigation of this complex reveals an oxo-bridged dinuclear structure with oxodiperoxo groups being further linked by a single triazole bridge.
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Affiliation(s)
- Lucie S Nogueira
- Department of Chemistry, CICECO-Aveiro Institute of Materials, University of Aveiro, Campus Universitário de Santiago, 3810-193 Aveiro, Portugal.
| | - Patrícia Neves
- Department of Chemistry, CICECO-Aveiro Institute of Materials, University of Aveiro, Campus Universitário de Santiago, 3810-193 Aveiro, Portugal.
| | - Ana C Gomes
- Department of Chemistry, CICECO-Aveiro Institute of Materials, University of Aveiro, Campus Universitário de Santiago, 3810-193 Aveiro, Portugal.
| | - Tatiana A Amarante
- Department of Chemistry, CICECO-Aveiro Institute of Materials, University of Aveiro, Campus Universitário de Santiago, 3810-193 Aveiro, Portugal.
| | - Filipe A Almeida Paz
- Department of Chemistry, CICECO-Aveiro Institute of Materials, University of Aveiro, Campus Universitário de Santiago, 3810-193 Aveiro, Portugal.
| | - Anabela A Valente
- Department of Chemistry, CICECO-Aveiro Institute of Materials, University of Aveiro, Campus Universitário de Santiago, 3810-193 Aveiro, Portugal.
| | - Isabel S Gonçalves
- Department of Chemistry, CICECO-Aveiro Institute of Materials, University of Aveiro, Campus Universitário de Santiago, 3810-193 Aveiro, Portugal.
| | - Martyn Pillinger
- Department of Chemistry, CICECO-Aveiro Institute of Materials, University of Aveiro, Campus Universitário de Santiago, 3810-193 Aveiro, Portugal.
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18
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Wang SY, Dong X, Zhou ZH. N-hetercycle dimeric molybdenum(V) complexes with strong interactions and their catalytic degradations of methyl orange. Inorganica Chim Acta 2018. [DOI: 10.1016/j.ica.2018.03.035] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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19
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Peuronen A, Sillanpää R, Lehtonen A. The Syntheses and Vibrational Spectra of 16
O- and 18
O-Enriched cis
-MO2
(M=Mo, W) Complexes. ChemistrySelect 2018. [DOI: 10.1002/slct.201800671] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Anssi Peuronen
- Laboratory of Inorganic Chemistry, Department of Chemistry; University of Jyväskylä; FI-40014 Jyväskylä Finland
| | - Reijo Sillanpää
- Laboratory of Inorganic Chemistry, Department of Chemistry; University of Jyväskylä; FI-40014 Jyväskylä Finland
| | - Ari Lehtonen
- Department of Chemistry, Group of Inorganic Materials Chemistry.; University of Turku; FI-20014 Turku Finland
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20
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Roy S, Saswati, Lima S, Dhaka S, Maurya MR, Acharyya R, Eagle C, Dinda R. Synthesis, structural studies and catalytic activity of a series of dioxidomolybdenum(VI)-thiosemicarbazone complexes. Inorganica Chim Acta 2018. [DOI: 10.1016/j.ica.2018.01.023] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
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21
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Majumder S, Pasayat S, Roy S, Dash SP, Dhaka S, Maurya MR, Reichelt M, Reuter H, Brzezinski K, Dinda R. Dioxidomolybdenum(VI) complexes bearing sterically constrained aroylazine ligands: Synthesis, structural investigation and catalytic evaluation. Inorganica Chim Acta 2018. [DOI: 10.1016/j.ica.2017.09.043] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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22
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23
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Begines E, Carrasco CJ, Montilla F, Álvarez E, Marchetti F, Pettinari R, Pettinari C, Galindo A. Oxidoperoxidomolybdenum(vi) complexes with acylpyrazolonate ligands: synthesis, structure and catalytic properties. Dalton Trans 2018; 47:197-208. [DOI: 10.1039/c7dt03939e] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
Oxidoperoxido–molybdenum(vi) complexes Ph4P[Mo(O)(O2)2(QR)] and [Mo(O)(O2)(QR)2] (QR = acylpyrazolonate ligands) were synthesised and tested as catalysts in epoxidation, sulphoxidation and epoxide deoxygenation.
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Affiliation(s)
- Emilio Begines
- Departamento de Química Inorgánica
- Facultad de Química
- Universidad de Sevilla
- 41071 Sevilla
- Spain
| | - Carlos J. Carrasco
- Departamento de Química Inorgánica
- Facultad de Química
- Universidad de Sevilla
- 41071 Sevilla
- Spain
| | - Francisco Montilla
- Departamento de Química Inorgánica
- Facultad de Química
- Universidad de Sevilla
- 41071 Sevilla
- Spain
| | - Eleuterio Álvarez
- Instituto de Investigaciones Químicas
- CSIC-Universidad de Sevilla
- 41092 Sevilla
- Spain
| | - Fabio Marchetti
- School of Sciences and Technologies
- University of Camerino
- 62032 Camerino MC
- Italy
| | - Riccardo Pettinari
- School of Sciences and Technologies
- University of Camerino
- 62032 Camerino MC
- Italy
| | | | - Agustín Galindo
- Departamento de Química Inorgánica
- Facultad de Química
- Universidad de Sevilla
- 41071 Sevilla
- Spain
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24
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Nassar AM, Abo Zeid EF, Elseman AM, Alotaibi NF. A novel heterometallic compound for design and study of electrical properties of silver nanoparticles-decorated lead compounds. NEW J CHEM 2018. [DOI: 10.1039/c7nj03682e] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A novel Ag-NPs decorated on hexagonal-like PbCO3 was constructed with a novel heterometallic compound (AgPb(C2O4)(NO3)) through thermal heating at 523 K.
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Affiliation(s)
- A. M. Nassar
- Chemistry Department
- College of Science
- Aljouf University
- Aljouf
- Saudi Arabia
| | - E. F. Abo Zeid
- Physics Department
- Faculty of Science
- Assiut University
- Assiut
- Egypt
| | - A. M. Elseman
- State Key Laboratory of Alternate Electrical Power System with Renewable Energy Sources
- North China Electric Power University
- Beijing 102206
- China
- Electronic and Magnetic Materials Department
| | - N. F. Alotaibi
- Chemistry Department
- College of Science
- Aljouf University
- Aljouf
- Saudi Arabia
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25
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Wang Z, Song X, Jiang L, Lin TT, Schreyer MK, Zhao J, Hor TSA. Seven-Coordinate MoII
−Diiodo Complexes with Benzothiazole−N-Heterocyclic-Carbene Ligands and Their Mo0
Precursors: Synthesis, Structures, and Catalytic Application in the Epoxidation of cis
-Cyclooctene. ASIAN J ORG CHEM 2017. [DOI: 10.1002/ajoc.201700583] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Affiliation(s)
- Zhe Wang
- Institute of Materials Research and Engineering; Agency for Science, Technology and Research (A*STAR); 2 Fusionopolis Way, Innovis Singapore 138634 Singapore
- Department of Chemistry; National University of Singapore; 3 Science Drive 3 Singapore 117543 Singapore
| | - Xiaolu Song
- Institute of Materials Research and Engineering; Agency for Science, Technology and Research (A*STAR); 2 Fusionopolis Way, Innovis Singapore 138634 Singapore
| | - Lu Jiang
- Institute of Materials Research and Engineering; Agency for Science, Technology and Research (A*STAR); 2 Fusionopolis Way, Innovis Singapore 138634 Singapore
| | - Ting Ting Lin
- Institute of Materials Research and Engineering; Agency for Science, Technology and Research (A*STAR); 2 Fusionopolis Way, Innovis Singapore 138634 Singapore
| | - Martin Karl Schreyer
- Institute of Chemical and Engineering Sciences; Agency for Science, Technology and Research (A*STAR); 1 Pesek Road, Jurong Island Singapore 627833 Singapore
| | - Jin Zhao
- Institute of Materials Research and Engineering; Agency for Science, Technology and Research (A*STAR); 2 Fusionopolis Way, Innovis Singapore 138634 Singapore
- Department of Chemistry; National University of Singapore; 3 Science Drive 3 Singapore 117543 Singapore
| | - T. S. Andy Hor
- Institute of Materials Research and Engineering; Agency for Science, Technology and Research (A*STAR); 2 Fusionopolis Way, Innovis Singapore 138634 Singapore
- Department of Chemistry; National University of Singapore; 3 Science Drive 3 Singapore 117543 Singapore
- Department of Chemistry; The University of Hong Kong; Hong Kong SAR China
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Zwettler N, Schachner JA, Belaj F, Mösch-Zanetti NC. Hydrogen bond donor functionalized dioxido-molybdenum(VI) complexes as robust and highly efficient precatalysts for alkene epoxidation. MOLECULAR CATALYSIS 2017. [DOI: 10.1016/j.mcat.2017.09.036] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
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27
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Ng VYM, Tse CW, Guan X, Chang X, Yang C, Low KH, Lee HK, Huang JS, Che CM. cis-Dioxorhenium(V/VI) Complexes Supported by Neutral Tetradentate N 4 Ligands. Synthesis, Characterization, and Spectroscopy. Inorg Chem 2017; 56:15066-15080. [PMID: 29190093 DOI: 10.1021/acs.inorgchem.7b02404] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
A series of cis-dioxorhenium(V) complexes containing chiral tetradentate N4 ligands, including cis-[ReV(O)2(pyxn)]+ (1; pyxn = N,N'-dimethyl-N,N'-bis(2-pyridylmethyl)cyclohexane-1,2-diamine), cis-[ReV(O)2(6-Me2pyxn)]+ (cis-2), cis-[ReV(O)2(R,R-pdp)]+ (3; R,R-pdp = 1,1'-bis((R,R)-2-pyridinylmethyl)-2,2'-bipyrrolidine), cis-[ReV(O)2(R,R-6-Me2pdp)]+ (4), and cis-[ReV(O)2(bqcn)]+ (5; bqcn = N,N'-dimethyl-N,N'-di(quinolin-8-yl)cyclohexane-1,2-diamine), were synthesized. Their structures were established by X-ray crystallography, showing Re-O distances in the range of 1.740(3)-1.769(8) Å and O-Re-O angles of 121.4(2)-124.8(4)°. Their cyclic voltammograms in MeCN (0.1 M [NBu4]PF6) display a reversible ReVI/V couple at E1/2 = 0.39-0.49 V vs SCE. In aqueous media, three proton-coupled electron transfer reactions corresponding to ReVI/V, ReV/III, and ReIII/II couples were observed at pH 1. The Pourbaix diagrams of 1·OTf, 3·OTf, and 5·OTf have been examined. The electronic absorption spectra of the cis-dioxorhenium(V) complexes show three absorption bands at around 800 nm (600-1730 dm3 mol-1 cm-1), 580 nm (1700-5580 dm3 mol-1 cm-1), and 462-523 nm (3170-6000 dm3 mol-1 cm-1). Reaction of 1 with Lewis acids (or protic acids) gave cis-[ReV(O)(OH)(pyxn)]2+ (1·H+), in which the Re-O distances are lengthened to 1.788(5) Å. Complex cis-2 resulted from isomerization of trans-2 at elevated temperature. cis-[ReVI(O)2(pyxn)](PF6)2 (1'·(PF6)2) was obtained by constant-potential electrolysis of 1·PF6 in MeCN (0.1 M [NBu4]PF6) at 0.56 V vs SCE; it displays shorter Re-O distances (1.722(4), 1.726(4) Å) and a smaller O-Re-O angle (114.88(18)°) relative to 1 and shows a d-d transition absorption band at 591 nm (ε = 77 dm3 mol-1 cm-1). With a driving force of ca. 75 kcal mol-1, 1' oxidizes hydrocarbons with weak C-H bonds (75.5-76.3 kcal mol-1) via hydrogen atom abstraction. DFT and TDDFT calculations on the electronic structures and spectroscopic properties of the cis-dioxorhenium(V/VI) complexes were performed.
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Affiliation(s)
- Vicky Yin-Ming Ng
- State Key Laboratory of Synthetic Chemistry, Institute of Molecular Functional Materials, and Department of Chemistry, The University of Hong Kong , Pokfulam Road, Hong Kong, People's Republic of Chinaa
| | - Chun-Wai Tse
- State Key Laboratory of Synthetic Chemistry, Institute of Molecular Functional Materials, and Department of Chemistry, The University of Hong Kong , Pokfulam Road, Hong Kong, People's Republic of Chinaa
| | - Xiangguo Guan
- State Key Laboratory of Synthetic Chemistry, Institute of Molecular Functional Materials, and Department of Chemistry, The University of Hong Kong , Pokfulam Road, Hong Kong, People's Republic of Chinaa
| | - Xiaoyong Chang
- State Key Laboratory of Synthetic Chemistry, Institute of Molecular Functional Materials, and Department of Chemistry, The University of Hong Kong , Pokfulam Road, Hong Kong, People's Republic of Chinaa
| | - Chen Yang
- State Key Laboratory of Synthetic Chemistry, Institute of Molecular Functional Materials, and Department of Chemistry, The University of Hong Kong , Pokfulam Road, Hong Kong, People's Republic of Chinaa
| | - Kam-Hung Low
- State Key Laboratory of Synthetic Chemistry, Institute of Molecular Functional Materials, and Department of Chemistry, The University of Hong Kong , Pokfulam Road, Hong Kong, People's Republic of Chinaa
| | - Hung Kay Lee
- Department of Chemistry, The Chinese University of Hong Kong , New Territories, Hong Kong, People's Republic of China
| | - Jie-Sheng Huang
- State Key Laboratory of Synthetic Chemistry, Institute of Molecular Functional Materials, and Department of Chemistry, The University of Hong Kong , Pokfulam Road, Hong Kong, People's Republic of Chinaa
| | - Chi-Ming Che
- State Key Laboratory of Synthetic Chemistry, Institute of Molecular Functional Materials, and Department of Chemistry, The University of Hong Kong , Pokfulam Road, Hong Kong, People's Republic of Chinaa.,HKU Shenzhen Institute of Research and Innovation , Shenzhen 518053, People's Republic of China
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28
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Nogueira LS, Neves P, Gomes AC, Valente AA, Pillinger M, Gonçalves IS. Performance of a tetracarbonylmolybdenum(0) pyrazolylpyridine (pre)catalyst in olefin epoxidation and epoxide alcoholysis. J Organomet Chem 2017. [DOI: 10.1016/j.jorganchem.2017.06.011] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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29
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Schachner JA, Mösch-Zanetti NC, Peuronen A, Lehtonen A. Dioxidomolybdenum(VI) and –tungsten(VI) complexes with tetradentate amino bisphenolates as catalysts for epoxidation. Polyhedron 2017. [DOI: 10.1016/j.poly.2017.06.011] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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30
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Peschel LM, Belaj F, Schachner JA, Mösch-Zanetti NC. Dinuclear MoV
Complexes with Thiophenolate-oxazoline Ligands: Synthesis, Characterization, and Exceptional Activity in Catalytic Olefin Epoxidation. Eur J Inorg Chem 2017. [DOI: 10.1002/ejic.201700159] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Lydia M. Peschel
- Institute of Chemistry; University of Graz; Schubertstrasse 1 8010 Graz Austria
| | - Ferdinand Belaj
- Institute of Chemistry; University of Graz; Schubertstrasse 1 8010 Graz Austria
| | - Jörg A. Schachner
- Institute of Chemistry; University of Graz; Schubertstrasse 1 8010 Graz Austria
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31
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Cantwell K, Fanwick PE, Abu-Omar MM. Mild, Selective Sulfoxidation with Molybdenum(VI) cis-Dioxo Catalysts. ACS OMEGA 2017; 2:1778-1785. [PMID: 31457541 PMCID: PMC6641015 DOI: 10.1021/acsomega.7b00292] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 03/12/2017] [Accepted: 04/21/2017] [Indexed: 06/10/2023]
Abstract
Three molybdenum(VI) cis-dioxo catalysts (8-10) were synthesized with the goal of developing stable and selective oxidation catalysts for sulfoxidation. Their reactivities were investigated with a variety of substrates. We have demonstrated the usefulness of these catalysts for the chemoselective sulfoxidation of sulfides in the presence of reactive moieties, which has important applications for total synthesis processes. Notably, these catalysts are able to oxidize compounds analogous to sulfur mustard and can be used as an alternative to sodium periodate or meta-chloroperoxybenzoic acid (m-CPBA) for the oxidation of various organic sulfides without sacrificing total conversion. As the catalysts are tolerant of water and hydrogen peroxide, they allow for the design of completely green oxidation reactions, particularly for sulfur-containing amino acids.
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32
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Neves P, Nogueira LS, Gomes AC, Oliveira TSM, Lopes AD, Valente AA, Gonçalves IS, Pillinger M. Chemistry and Catalytic Performance of Pyridyl‐Benzimidazole Oxidomolybdenum(VI) Compounds in (Bio)Olefin Epoxidation. Eur J Inorg Chem 2017. [DOI: 10.1002/ejic.201700286] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Patrícia Neves
- Department of Chemistry CICECO – Aveiro Institute of Materials University of Aveiro Campus Universitário de Santiago 3810‐193 Aveiro Portugal
| | - Lucie S. Nogueira
- Department of Chemistry CICECO – Aveiro Institute of Materials University of Aveiro Campus Universitário de Santiago 3810‐193 Aveiro Portugal
| | - Ana C. Gomes
- Department of Chemistry CICECO – Aveiro Institute of Materials University of Aveiro Campus Universitário de Santiago 3810‐193 Aveiro Portugal
| | - Tânia S. M. Oliveira
- Faculty of Science and Technology, CIQA University of the Algarve Campus de Gambelas 8005‐136 Faro Portugal
| | - André D. Lopes
- Faculty of Science and Technology, CIQA University of the Algarve Campus de Gambelas 8005‐136 Faro Portugal
| | - Anabela A. Valente
- Department of Chemistry CICECO – Aveiro Institute of Materials University of Aveiro Campus Universitário de Santiago 3810‐193 Aveiro Portugal
| | - Isabel S. Gonçalves
- Department of Chemistry CICECO – Aveiro Institute of Materials University of Aveiro Campus Universitário de Santiago 3810‐193 Aveiro Portugal
| | - Martyn Pillinger
- Department of Chemistry CICECO – Aveiro Institute of Materials University of Aveiro Campus Universitário de Santiago 3810‐193 Aveiro Portugal
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33
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Ghosh S, Kurapati SK, Pal S. Complexes of cis-dioxomolybdenum(VI) with a chiral tetradentate tripodal-like ligand system: Syntheses, structures and catalytic activities. Polyhedron 2017. [DOI: 10.1016/j.poly.2016.08.025] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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34
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Cindrić M, Pavlović G, Katava R, Agustin D. Towards a global greener process: from solvent-less synthesis of molybdenum(vi) ONO Schiff base complexes to catalyzed olefin epoxidation under organic-solvent-free conditions. NEW J CHEM 2017. [DOI: 10.1039/c6nj03174a] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Schiff base ligands and corresponding molybdenum(vi) complexes, prepared using classical and/or mechanochemical methods, were active as epoxidation pre(catalysts).
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Affiliation(s)
- Marina Cindrić
- University of Zagreb
- Faculty of Science
- Department of Chemistry
- Horvatovac 102a
- HR-10000 Zagreb
| | - Gordana Pavlović
- University of Zagreb
- Faculty of Textile Technology
- Department of Applied Chemistry
- Prilaz Baruna Filipovića 28a
- HR-10000 Zagreb
| | - Robert Katava
- University of Zagreb
- Faculty of Science
- Department of Chemistry
- Horvatovac 102a
- HR-10000 Zagreb
| | - Dominique Agustin
- CNRS
- LCC (Laboratoire de Chimie de Coordination)
- 205 route de Narbonne
- BP 44099
- F-31077 Toulouse Cedex 4
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35
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Song X, Lim MH, Mohamed DKB, Wong SM, Zhao J, Hor TA. Re(I) carbonyl complexes containing pyridyl-imine and amine ligands: Synthesis, characterization and their catalytic olefin epoxidation activities. J Organomet Chem 2016. [DOI: 10.1016/j.jorganchem.2016.04.010] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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36
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37
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Wang W, Daran JC, Poli R, Agustin D. OH-substituted tridentate ONO Schiff base ligands and related molybdenum(VI) complexes for solvent-free (ep)oxidation catalysis with TBHP as oxidant. ACTA ACUST UNITED AC 2016. [DOI: 10.1016/j.molcata.2016.02.021] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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38
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Maghami M, Farzaneh F, Simpson J, Azarkish M. Synthesis, crystal structure and characterization a new ionic complex MoO2Cl3(MeOH)·H3tptz·Cl2 (tptz = 2,4,6-tris(2-pyridyl)-1,3,5-triazine) as epoxidation catalyst. Inorganica Chim Acta 2016. [DOI: 10.1016/j.ica.2016.02.015] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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39
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Kück JW, Reich RM, Kühn FE. Molecular Epoxidation Reactions Catalyzed by Rhenium, Molybdenum, and Iron Complexes. CHEM REC 2016; 16:349-64. [DOI: 10.1002/tcr.201500233] [Citation(s) in RCA: 43] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2015] [Indexed: 11/06/2022]
Affiliation(s)
- Jens W. Kück
- Department of Chemistry and Catalysis Research Center; Technische Universität München (TUM); Lichtenbergstr. 4 D-85747 Garching bei München Germany
| | - Robert M. Reich
- Department of Chemistry and Catalysis Research Center; Technische Universität München (TUM); Lichtenbergstr. 4 D-85747 Garching bei München Germany
| | - Fritz E. Kühn
- Department of Chemistry and Catalysis Research Center; Technische Universität München (TUM); Lichtenbergstr. 4 D-85747 Garching bei München Germany
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40
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Reich RM, Kaposi M, Pöthig A, Kühn FE. Kinetic studies of fluorinated aryl molybdenum(ii) tricarbonyl precursors in epoxidation catalysis. Catal Sci Technol 2016. [DOI: 10.1039/c5cy02220g] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
Benzyl substituted molybdenum tricarbonyl complexes displaying CF3 groups are synthesized and applied as catalyst precursors in olefin epoxidation reactions.
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Affiliation(s)
- Robert M. Reich
- Molecular Catalysis
- Department of Chemistry and Catalysis Research Center
- Technische Universität München
- D-85747 Garching bei München
- Germany
| | - Marlene Kaposi
- Molecular Catalysis
- Department of Chemistry and Catalysis Research Center
- Technische Universität München
- D-85747 Garching bei München
- Germany
| | - Alexander Pöthig
- Catalysis Research Center
- Technische Universität München
- D-85747 Garching bei München
- Germany
| | - Fritz E. Kühn
- Molecular Catalysis
- Department of Chemistry and Catalysis Research Center
- Technische Universität München
- D-85747 Garching bei München
- Germany
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41
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Kurapati SK, Pal S. cis-Dioxomolybdenum(VI) complexes with unsymmetric linear tetradentate ligands: syntheses, structures and bromoperoxidase activities. Appl Organomet Chem 2015. [DOI: 10.1002/aoc.3403] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
Affiliation(s)
| | - Samudranil Pal
- School of Chemistry; University of Hyderabad; Hyderabad 500046 India
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42
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Zwettler N, Dupé A, Schachner JA, Belaj F, Mösch-Zanetti NC. Templated C-C and C-N Bond Formation Facilitated by a Molybdenum(VI) Metal Center. Inorg Chem 2015; 54:11969-76. [PMID: 26646158 DOI: 10.1021/acs.inorgchem.5b02347] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Preparation of molybdenum dioxido complexes with novel iminophenolate ligands bearing pendant secondary amide functionalities led to unprecedented C-C and C-N coupling reactions of two α-iminoamides upon coordination. The diastereoselective cyclization to asymmetric imidazolidines occurs at the metal center in two consecutive steps via a monocoupled intermediate. A meaningful mechanism is proposed on the basis of full characterization of intermediate and final molybdenum-containing products by spectroscopic means and by single-crystal X-ray diffraction analyses. This process constitutes the first example of a diastereoselective self-cyclization of two α-iminoamides.
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Affiliation(s)
- Niklas Zwettler
- Institute of Chemistry, Inorganic Chemistry, University of Graz , Schubertstrasse 1, 8010 Graz, Austria
| | - Antoine Dupé
- Institute of Chemistry, Inorganic Chemistry, University of Graz , Schubertstrasse 1, 8010 Graz, Austria
| | - Jörg A Schachner
- Institute of Chemistry, Inorganic Chemistry, University of Graz , Schubertstrasse 1, 8010 Graz, Austria
| | - Ferdinand Belaj
- Institute of Chemistry, Inorganic Chemistry, University of Graz , Schubertstrasse 1, 8010 Graz, Austria
| | - Nadia C Mösch-Zanetti
- Institute of Chemistry, Inorganic Chemistry, University of Graz , Schubertstrasse 1, 8010 Graz, Austria
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43
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Thompson DJ, Cao Z, Judkins EC, Fanwick PE, Ren T. Peroxo-dimolybdate catalyst for the oxygenation of organic sulfides by hydrogen peroxide. Inorganica Chim Acta 2015. [DOI: 10.1016/j.ica.2015.08.016] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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44
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45
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de Aguiar SRMM, Öztopcu Ö, Stöger B, Mereiter K, Veiros LF, Pittenauer E, Allmaier G, Kirchner K. Synthesis and reactivity of coordinatively unsaturated halocarbonyl molybdenum PNP pincer complexes. Dalton Trans 2015; 43:14669-79. [PMID: 25142749 DOI: 10.1039/c4dt01932f] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
In the present study a series of six-coordinate neutral 16e halocarbonyl Mo(ii) complexes of the type [Mo(PNP(Me)-iPr)(CO)X2] (X = I, Br, Cl), featuring the PNP pincer ligand N,N'-bis(diisopropylphosphino)-N,N'-dimethyl-2,6-diaminopyridine (PNP(Me)-iPr), were prepared and fully characterized. The synthesis of these complexes was accomplished by different methodologies depending on the halide ligands. For X = I and Br, [Mo(PNP(Me)-iPr)(CO)I2] and [Mo(PNP(Me)-iPr)(CO)Br2] were obtained by reacting [Mo(PNP(Me)-iPr)(CO)3] with stoichiometric amounts of I2 and Br2, respectively. In the case of X = Cl, [Mo(PNP(Me)-iPr)(CO)Cl2] was afforded by the reaction of [Mo(CO)4(μ-Cl)Cl]2 with 1 equiv. of PNP(Me)-iPr. The equivalent procedure also worked for X = Br. The modification of the 2,6-diaminopyridine scaffold by introducing NMe instead of NH spacers between the aromatic pyridine ring and the phosphine moieties changed the steric properties of the PNP-iPr ligand significantly. While in the present case exclusively neutral six-coordinate complexes of the type [Mo(PNP(Me)-iPr)(CO)X2] were obtained, with the parent PNP-iPr ligand, i.e. featuring NH spacers, cationic seven-coordinate complexes of the type [Mo(PNP-iPr)(CO)3X]X were afforded. Upon treatment of [Mo(PNP(Me)-iPr)(CO)X2] (X = Br, Cl) with Ag(+) in CH3CN, the cationic complexes [Mo(PNP(Me)-iPr)(CO)(CH3CN)X](+) were formed. Halide abstraction from [Mo(PNP(Me)-iPr)(CO)Cl2] in THF-CH2Cl2 afforded [Mo(PNP(Me)-iPr)(CO)(THF)Cl](+). In keeping with the facile synthesis of monocationic complexes preliminary ESI-MS and DFT/B3LYP studies revealed that one halide ligand in complexes [Mo(PNP(Me)-iPr)(CO)X2] is labile forming cationic fragments [Mo(PNP(Me)-iPr)(CO)X](+) which react with molecular oxygen in parallel pathways to yield mono and dioxo Mo(iv) and Mo(vi) species. Structures of representative complexes were determined by X-ray single crystal analyses.
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Affiliation(s)
- Sara R M M de Aguiar
- Institute of Applied Synthetic Chemistry, Vienna University of Technology, Getreidemarkt 9, A-1060 Vienna, Austria.
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46
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47
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Şahin Z, Gürbüz N, Özdemir İ, Şahin O, Büyükgüngör O, Achard M, Bruneau C. N-Alkylation and N,C-Dialkylation of Amines with Alcohols in the Presence of Ruthenium Catalysts with Chelating N-Heterocyclic Carbene Ligands. Organometallics 2015. [DOI: 10.1021/om501066n] [Citation(s) in RCA: 45] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
Affiliation(s)
- Zeynel Şahin
- Catalysis
Research and Application Center, Inönü University, 44280 Malatya, Turkey
| | - Nevin Gürbüz
- Catalysis
Research and Application Center, Inönü University, 44280 Malatya, Turkey
| | - İsmail Özdemir
- Catalysis
Research and Application Center, Inönü University, 44280 Malatya, Turkey
| | - Onur Şahin
- Scientific
and Technological Research Application and Research Center, Sinop University, 57010 Sinop, Turkey
| | - Orhan Büyükgüngör
- Department
of Physics, Ondokuz Mayıs University, 55139 Samsun, Turkey
| | - Mathieu Achard
- Université de Rennes 1, UMR6226: Institut des Sciences
Chimiques de Rennes, Centre de Catalyse et Chimie Verte, 35042 Rennes, France
| | - Christian Bruneau
- Université de Rennes 1, UMR6226: Institut des Sciences
Chimiques de Rennes, Centre de Catalyse et Chimie Verte, 35042 Rennes, France
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48
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Catalytic potentials of homodioxo-bimetallic dihydrazone complexes of uranium and molybdenum in a homogeneous oxidation of alkenes. MONATSHEFTE FUR CHEMIE 2015. [DOI: 10.1007/s00706-015-1477-9] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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49
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Complexes of cis -dioxomolybdenum(VI) with unsymmetrical tripodal NO 3 -donor ligands: Synthesis, characterization and catalytic applications. Inorganica Chim Acta 2015. [DOI: 10.1016/j.ica.2015.02.022] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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50
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Huang L, Wang W, Wei H. A computational study on high-valent mono-oxo-rhenium(V) complex-catalyzed hydrosilylation of carbonyls: What a difference an oxo ligand makes. ACTA ACUST UNITED AC 2015. [DOI: 10.1016/j.molcata.2015.01.019] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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