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Tian T, Feng C, Wang Y, Zhu X, Yuan D, Yao Y. Synthesis of N-Methyl- o-phenylenediamine-Bridged Bis(phenolato) Lanthanide Alkoxides and Their Catalytic Performance for the (Co)Polymerization of rac-Butyrolactone and l-Lactide. Inorg Chem 2022; 61:9918-9929. [PMID: 35723524 DOI: 10.1021/acs.inorgchem.2c00582] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
A series of lanthanide alkoxo complexes supported by ONNO salalen ligands were synthesized and characterized. A one-pot reaction of LH2 (L = (2-O-C6H2-tBu2-3,5)CH═N-C6H4-N(CH3)CH2(2-O-C6H2-tBu2-3,5)) with LnCp3(THF) in a 1:1 molar ratio followed by the addition of 1 equiv of ROH (R = Bn, iPr, and CF3CH2), afforded the dimeric lanthanide alkoxo complexes [LLn(μ-OCH2Ph)]2 [Ln = Lu (1), Yb (2), Sm (3), Nd (4)], [L2Yb(μ-OiPr)]2 (5), and [L2Yb(μ-OCH2CF3)]2 (6) in good isolated yields. All these lanthanide complexes were characterized by elemental analysis and FT-IR spectroscopy. In addition, complex 1 has been characterized by NMR spectroscopy. Single-crystal X-ray diffraction analysis of complexes 1, 2, 5, and 6 showed that these lanthanide alkoxo complexes are dimeric in the solid state. Complexes 1-6 showed good activity toward the homopolymerization of rac-butyrolactone (rac-BBL) to give atactic PHB, and ionic radii of central metals have profound influence on the polymerization. The polymerization behavior of l-lactide (l-LA) initiated by complex 2 was also explored. The kinetic study revealed that the polymerizations of rac-BBL and l-LA initiated by salalen lanthanide akoxide are first order for both the monomer and the initiator concentrations. Furthermore, it was found that complexes 1 and 2 showed good activity in the copolymerization of l-LA and rac-BBL, affording gradient copolymers.
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Affiliation(s)
- Tian Tian
- Key Laboratory of Organic Synthesis of Jiangsu Province, College of Chemistry, Chemical Engineering & Materials Science, Dushu Lake Campus, Soochow University, Suzhou 215123, People's Republic of China
| | - Chunping Feng
- Key Laboratory of Organic Synthesis of Jiangsu Province, College of Chemistry, Chemical Engineering & Materials Science, Dushu Lake Campus, Soochow University, Suzhou 215123, People's Republic of China
| | - Yaorong Wang
- Key Laboratory of Organic Synthesis of Jiangsu Province, College of Chemistry, Chemical Engineering & Materials Science, Dushu Lake Campus, Soochow University, Suzhou 215123, People's Republic of China
| | - Xuehua Zhu
- School of Chemistry and Life Science, Suzhou University of Science and Technology, Suzhou 215009, People's Republic of China
| | - Dan Yuan
- Key Laboratory of Organic Synthesis of Jiangsu Province, College of Chemistry, Chemical Engineering & Materials Science, Dushu Lake Campus, Soochow University, Suzhou 215123, People's Republic of China
| | - Yingming Yao
- Key Laboratory of Organic Synthesis of Jiangsu Province, College of Chemistry, Chemical Engineering & Materials Science, Dushu Lake Campus, Soochow University, Suzhou 215123, People's Republic of China
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2
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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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3
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Trieu-Tran T, Martinez SN, Brannon JP, Stieber SCE, John A. Crystal structures of two dioxomolybdenum complexes stabilized by salan ligands featuring phenyl and cyclo-hexyl backbones. Acta Crystallogr E Crystallogr Commun 2022; 78:244-250. [PMID: 35371549 PMCID: PMC8900517 DOI: 10.1107/s2056989022000524] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2021] [Accepted: 01/13/2022] [Indexed: 11/10/2022]
Abstract
Two cis-dioxomolybdenum complexes based on salan ligands with different backbones are reported. The first complex, dioxido{2,2'-[l,2-phenyl-enebis(imino-methyl-ene)]bis-(phenolato)}molybdenum(VI) di-methyl-formamide disolvate, [Mo(C20H18N2O2)O2]·2C3H7NO (PhLMoO2, 1b), features a phenyl backbone, while the second complex, (6,6'-{[(cyclo-hexane-1,2-di-yl)bis(aza-nedi-yl)]bis-(methyl-ene)}bis-(2,4-di-tert-butyl-phenolato))dioxidomolybdenum(VI) methanol disolvate, [Mo(C36H56N2O2)O2]·2CH3OH (CyLMoO2, 2b), is based on a cyclo-hexyl backbone. These complexes crystallized as solvated species, 1b·2DMF and 2b·2MeOH. The salan ligands PhLH2 (1a) and CyLH2 (2a) coordinate to the molybdenum center in these complexes 1b and 2b in a κ2 N,κ2 O fashion, forming a distorted octa-hedral geometry. The Mo-N and Mo-O distances are 2.3475 (16) and 1.9567 (16) Å, respectively, in 1b while the corresponding measurements are Mo-N = 2.3412 (12) Å, and Mo-O = 1.9428 (10) Å for 2b. A key geometrical feature is that the N-Mo-N angle of 72.40 (4)° in CyLMoO2 is slightly less than that of the PhLMoO2 angle of 75.18 (6)°, which is attributed to the flexibility of the cyclo-hexane ring between the nitro-gen as compared to the rigid phenyl ring in the PhLMoO2.
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Affiliation(s)
- Tristhan Trieu-Tran
- Chemistry & Biochemistry Department, California State Polytechnic University, Pomona, 3801 W. Temple Ave., Pomona, CA 91768, USA
| | - Stephenie N. Martinez
- Chemistry & Biochemistry Department, California State Polytechnic University, Pomona, 3801 W. Temple Ave., Pomona, CA 91768, USA
| | - Jacob P. Brannon
- Chemistry & Biochemistry Department, California State Polytechnic University, Pomona, 3801 W. Temple Ave., Pomona, CA 91768, USA
| | - S. Chantal E. Stieber
- Chemistry & Biochemistry Department, California State Polytechnic University, Pomona, 3801 W. Temple Ave., Pomona, CA 91768, USA
| | - Alex John
- Chemistry & Biochemistry Department, California State Polytechnic University, Pomona, 3801 W. Temple Ave., Pomona, CA 91768, USA
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4
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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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5
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Kim S, Zhong H, Park Y, Loose F, Chirik PJ. Catalytic Hydrogenation of a Manganese(V) Nitride to Ammonia. J Am Chem Soc 2020; 142:9518-9524. [PMID: 32339454 DOI: 10.1021/jacs.0c03346] [Citation(s) in RCA: 21] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The catalytic hydrogenation of a metal nitride to produce free ammonia using a rhodium hydride catalyst that promotes H2 activation and hydrogen-atom transfer is described. The phenylimine-substituted rhodium complex (η5-C5Me5)Rh(MePhI)H (MePhI = N-methyl-1-phenylethan-1-imine) exhibited higher thermal stability compared to the previously reported (η5-C5Me5)Rh(ppy)H (ppy = 2-phenylpyridine). DFT calculations established that the two rhodium complexes have comparable Rh-H bond dissociation free energies of 51.8 kcal mol-1 for (η5-C5Me5)Rh(MePhI)H and 51.1 kcal mol-1 for (η5-C5Me5)Rh(ppy)H. In the presence of 10 mol% of the phenylimine rhodium precatalyst and 4 atm of H2 in THF, the manganese nitride (tBuSalen)Mn≡N underwent hydrogenation to liberate free ammonia with up to 6 total turnovers of NH3 or 18 turnovers of H• transfer. The phenylpyridine analogue proved inactive for ammonia synthesis under identical conditions owing to competing deleterious hydride transfer chemistry. Subsequent studies showed that the use of a non-polar solvent such as benzene suppressed formation of the cationic rhodium product resulting from the hydride transfer and enabled catalytic ammonia synthesis by proton-coupled electron transfer.
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Affiliation(s)
- Sangmin Kim
- Department of Chemistry, Frick Laboratory, Princeton University, Princeton, New Jersey 08544, United States
| | - Hongyu Zhong
- Department of Chemistry, Frick Laboratory, Princeton University, Princeton, New Jersey 08544, United States
| | - Yoonsu Park
- Department of Chemistry, Frick Laboratory, Princeton University, Princeton, New Jersey 08544, United States
| | - Florian Loose
- Department of Chemistry, Frick Laboratory, Princeton University, Princeton, New Jersey 08544, United States
| | - Paul J Chirik
- Department of Chemistry, Frick Laboratory, Princeton University, Princeton, New Jersey 08544, United States
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6
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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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7
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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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8
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Ji J, Chen X, Wang CJ, Jia AQ, Zhang QF. Syntheses, structures and electrochemical properties of ruthenium(II/III) complexes with tetradentate Schiff base ligands. J COORD CHEM 2019. [DOI: 10.1080/00958972.2019.1566541] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Affiliation(s)
- Jiao Ji
- Institute of Molecular Engineering and Applied Chemistry, Anhui University of Technology, Ma’anshan, Anhui, P R China
| | - Xin Chen
- Institute of Molecular Engineering and Applied Chemistry, Anhui University of Technology, Ma’anshan, Anhui, P R China
| | - Chang-Jiu Wang
- Institute of Molecular Engineering and Applied Chemistry, Anhui University of Technology, Ma’anshan, Anhui, P R China
| | | | - Qian-Feng Zhang
- Institute of Molecular Engineering and Applied Chemistry, Anhui University of Technology, Ma’anshan, Anhui, P R China
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9
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Chiang L, Wasinger EC, Shimazaki Y, Young V, Storr T, Stack TDP. Electronic Structure and Reactivity Studies of a Nonsymmetric One-Electron Oxidized Cu II Bis-phenoxide Complex. Inorganica Chim Acta 2018; 481:151-158. [PMID: 30581226 PMCID: PMC6301013 DOI: 10.1016/j.ica.2017.09.042] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
The tetradentate mixed imino/amino phenoxide ligand (N-(3,5-di-tert-butylsalicylidene)-N'-(2-hydroxyl-3,5-di-tert-butylbenzyl))-trans-1,2-cyclohexanediamine (salalen) was complexed with CuII, and the resulting Cu complex (2) was characterized by a number of experimental techniques and theoretical calculations. Two quasi-reversible redox processes for 2, as observed by cyclic voltammetry, demonstrated the potential stability of oxidized forms, and also the increased electron-donating ability of the salalen ligand in comparison to the salen analogue. The electronic structure of the one-electron oxidized [2]+ was then studied in detail, and Cu K-edge X-ray Absorption Spectroscopy (XAS) measurements confirmed a CuII-phenoxyl radical complex in solution. Subsequent resonance Raman (rR) and variable temperature 1H NMR studies, coupled with theoretical calculations, showed that [2• ]+ is a triplet (S = 1) CuII-phenoxyl radical species, with localization of the radical on the more electron-rich aminophenoxide. Attempted isolation of X-ray quality crystals of [2• ]+ afforded [2H]+, with a protonated phenol bonded to CuII, and an additional H-bonding interaction with the SbF6 - counterion. Stoichiometric reaction of dilute solutions of [2• ]+ with benzyl alcohol showed that the complex reacted in a similar manner as the oxidized CuII-salen analogue, and does not exhibit a substrate-binding pre-equilibrium as observed for the oxidized bisaminophenoxide CuII-salan derivative.
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Affiliation(s)
- Linus Chiang
- Department of Chemistry, Stanford University, Stanford, CA 94305, USA
| | - Erik C Wasinger
- Department of Chemistry and Biochemistry, California State University, Chico, CA 95928, USA
| | - Yuichi Shimazaki
- College of Science, Ibaraki University. Bunkyo, Mito, 310-8512, Japan
| | - Victor Young
- Department of Chemistry, The University of Minnesota, Minneapolis, MN 55455, USA
| | - Tim Storr
- Department of Chemistry, Simon Fraser University, Burnaby, BC, Canada
| | - T Daniel P Stack
- Department of Chemistry, Stanford University, Stanford, CA 94305, USA
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10
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Haghdoost MM, Zwettler N, Golbaghi G, Belaj F, Bagherzadeh M, Schachner JA, Mösch‐Zanetti NC. Diastereoselective Synthesis and Catalytic Activity of Two Chiral
cis
‐Dioxidomolybdenum(VI) Complexes. Eur J Inorg Chem 2018. [DOI: 10.1002/ejic.201800285] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Affiliation(s)
| | - Niklas Zwettler
- Institute of Chemistry University of Graz Schubertstr. 1 8010 Graz Austria
| | - Golara Golbaghi
- Chemistry Department Sharif University of Technology P.O. Box 11155 3615 Tehran Iran
| | - Ferdinand Belaj
- Institute of Chemistry University of Graz Schubertstr. 1 8010 Graz Austria
| | - Mojtaba Bagherzadeh
- Chemistry Department Sharif University of Technology P.O. Box 11155 3615 Tehran Iran
| | - Jörg A. Schachner
- Institute of Chemistry University of Graz Schubertstr. 1 8010 Graz Austria
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11
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Zwettler N, Walg SP, Belaj F, Mösch‐Zanetti NC. Heterolytic Si-H Bond Cleavage at a Molybdenum-Oxido-Based Lewis Pair. Chemistry 2018; 24:7149-7160. [PMID: 29521459 PMCID: PMC6001527 DOI: 10.1002/chem.201800226] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2018] [Indexed: 12/15/2022]
Abstract
The reaction of a molybdenum(VI) oxido imido complex with the strong Lewis acid B(C6 F5 )3 gave access to the Lewis adduct [Mo{OB(C6 F5 )3 }(NtBu)L2 ] featuring reversible B-O bonding in solution. The resulting frustrated Lewis pair (FLP)-like reactivity is reflected by the compound's ability to heterolytically cleave Si-H bonds, leading to a clean formation of the novel cationic MoVI species 3 a (R=Et) and 3 b (R=Ph) of the general formula [Mo(OSiR3 )(NtBu)L2 ][HB(C6 F5 )3 ]. These compounds possess properties highly unusual for molybdenum d0 species such as an intensive, charge-transfer-based color as well as a reversible redox couple at very low potentials, both dependent on the silane used. Single-crystal X-ray diffraction analyses of 2 and 4 b, a derivative of 3 b featuring the [FB(C6 F5 )3 ]- anion, picture the stepwise elongation of the Mo=O bond, leading to a large increase in the electrophilicity of the metal center. The reaction of 3 a and 3 b with benzaldehyde allowed for the regeneration of compound 2 by hydrosilylation of the benzaldehyde. NMR spectroscopy suggested an unusual mechanism for the transformation, involving a substrate insertion in the B-H bond of the borohydride anion.
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Affiliation(s)
- Niklas Zwettler
- Institute of Chemistry, Inorganic ChemistryUniversity of GrazSchubertstrasse 18010GrazAustria
| | - Simon P. Walg
- Institute of Chemistry, Inorganic ChemistryUniversity of GrazSchubertstrasse 18010GrazAustria
| | - Ferdinand Belaj
- Institute of Chemistry, Inorganic ChemistryUniversity of GrazSchubertstrasse 18010GrazAustria
| | - Nadia C. Mösch‐Zanetti
- Institute of Chemistry, Inorganic ChemistryUniversity of GrazSchubertstrasse 18010GrazAustria
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12
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de Aguiar SRMM, Öztopcu Ö, Troiani A, de Petris G, Weil M, Stöger B, Pittenauer E, Allmaier G, Veiros LF, Kirchner K. Formation of Mono Oxo Molybdenum(IV) PNP Pincer Complexes: Interplay between Water and Molecular Oxygen. Eur J Inorg Chem 2018; 2018:876-884. [PMID: 31057330 PMCID: PMC6485545 DOI: 10.1002/ejic.201701413] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2017] [Indexed: 11/11/2022]
Abstract
The synthesis of cationic mono oxo MoIV PNP pincer complexes of the type [Mo(PNPMe-iPr)(O)X]+ (X = I, Br) from [Mo(PNPMe-iPr)(CO)X2] is described. These compounds are coordinatively unsaturated and feature a strong Mo≡O triple bond. The formation of these complexes proceeds via cationic 14e intermediates [Mo(PNPMe-iPr)(CO)X]+ and requires both molecular oxygen and water. ESI MS measurements with 18O labeled water (H2 18O) and molecular oxygen (18O2) indicates that water plays a crucial role in the formation of the Mo≡O bond. A plausible mechanism based on DFT calculations is provided. The X-ray structure of [Mo(PNPMe-iPr)(O)I]SbF6 is presented.
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Affiliation(s)
- Sara R. M. M. de Aguiar
- Institute of Applied Synthetic ChemistryVienna University of TechnologyGetreidemarkt 91060ViennaAustria
| | - Özgür Öztopcu
- Institute of Applied Synthetic ChemistryVienna University of TechnologyGetreidemarkt 91060ViennaAustria
| | - Anna Troiani
- Dipartimento di Chimica e Tecnologie del FarmacoUniversità di Roma “La Sapienza”P. le Aldo Moro 500185RomaItaly
| | - Giulia de Petris
- Dipartimento di Chimica e Tecnologie del FarmacoUniversità di Roma “La Sapienza”P. le Aldo Moro 500185RomaItaly
| | - Matthias Weil
- Institute of Chemical Technologies and AnalyticsVienna University of TechnologyGetreidemarkt 91060ViennaAustria
| | - Berthold Stöger
- X‐ray CenterVienna University of TechnologyGetreidemarkt 91060ViennaAustria
| | - Ernst Pittenauer
- Institute of Chemical Technologies and AnalyticsVienna University of TechnologyGetreidemarkt 91060ViennaAustria
| | - Günter Allmaier
- Institute of Chemical Technologies and AnalyticsVienna University of TechnologyGetreidemarkt 91060ViennaAustria
| | - Luis F. Veiros
- Centro de Química EstruturalInstituto Superior TécnicoUniversidade de LisboaAv. Rovisco Pais No. 11049‐001LisboaPortugal
| | - Karl Kirchner
- Institute of Applied Synthetic ChemistryVienna University of TechnologyGetreidemarkt 91060ViennaAustria
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13
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Pérez DE, Smeltz JL, Sommer RD, Boyle PD, Ison EA. Cationic rhenium(iii) complexes: synthesis, characterization, and reactivity for hydrosilylation of aldehydes. Dalton Trans 2018; 46:4609-4616. [PMID: 28322396 DOI: 10.1039/c7dt00271h] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
A series of novel cationic Re(iii) complexes [(DAAm)Re(CO)(NCCH3)2][X] [DAAm = N,N-bis(2-arylaminoethyl)methylamine; aryl = C6F5 (a), Mes (b)] [X = OTf (2), BArF4 [BArF4 = tetrakis[3,5-(trifluoromethyl)phenyl]borate] (3), BF4 (4), PF6 (5)], and their analogue [(DAmA)Re(CO)(Cl)2] [DAmA = N,N-bis(2-arylamineethyl)methylamino; aryl = C6F5] (6) were synthesized. The catalytic efficiency for the hydrosilylation reaction of aldehydes using 4a (0.03 mol%) has been demonstrated to be significantly more active than rhenium catalysts previously reported in the literature. The data suggest that electron-withdrawing substituents at the diamido amine ligand increase the catalytic efficiency of the complexes. Excellent yields were achieved at ambient temperature under neat conditions using dimethylphenylsilane. The reaction affords TONs of up to 9200 and a TOF of up to 126 h-1. Kinetic and mechanistic studies were performed, and the data suggest that the reaction is via a non-hydride ionic hydrosilylation mechanism.
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Affiliation(s)
- Damaris E Pérez
- Department of Chemistry, North Carolina State University, 2620 Yarbrough Drive, Raleigh, North Carolina 27695-8204, USA.
| | - Jessica L Smeltz
- Department of Chemistry, North Carolina State University, 2620 Yarbrough Drive, Raleigh, North Carolina 27695-8204, USA.
| | - Roger D Sommer
- Department of Chemistry, North Carolina State University, 2620 Yarbrough Drive, Raleigh, North Carolina 27695-8204, USA.
| | - Paul D Boyle
- Department of Chemistry, North Carolina State University, 2620 Yarbrough Drive, Raleigh, North Carolina 27695-8204, USA.
| | - Elon A Ison
- Department of Chemistry, North Carolina State University, 2620 Yarbrough Drive, Raleigh, North Carolina 27695-8204, USA.
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Saswati, Roy S, Dash SP, Acharyya R, Kaminsky W, Ugone V, Garribba E, Harris C, Lowe JM, Dinda R. Chemistry of oxidomolybdenum(IV) and -(VI) complexes with ONS donor ligands: Synthesis, computational evaluation and oxo-transfer reactions. Polyhedron 2018. [DOI: 10.1016/j.poly.2017.12.023] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
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15
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16
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van de Watering FF, Lutz M, Dzik WI, de Bruin B, Reek JNH. Reactivity of a Ruthenium-Carbonyl Complex in the Methanol Dehydrogenation Reaction. ChemCatChem 2016; 8:2752-2756. [PMID: 27917245 PMCID: PMC5129501 DOI: 10.1002/cctc.201600709] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2016] [Indexed: 11/11/2022]
Abstract
Finding new catalysts for the release of molecular hydrogen from methanol is of high relevance in the context of the development of sustainable energy carriers. Herein, we report that the ruthenium complex Ru(salbinapht)(CO)(Pi‐Pr3) {salbinapht=2‐[({2′‐[(2‐hydroxybenzyl)amino]‐[1,1′‐binaphthalen]‐2‐yl}imino)methyl]phenolato} (2) catalyzes the methanol dehydrogenation reaction in the presence of base and water to yield H2, formate, and carbonate. Dihydrogen is the only gas detected and a turnover frequency up to 55 h−1 at 82 °C is reached. Complex 2 bears a carbonyl ligand that is derived from methanol, as is demonstrated by labeling experiments. The carbonyl ligand can be treated with base to form formate (HCOO−) and hydrogen. The nature of the active species is further shown not to contain a CO ligand but likely still possesses a salen‐derived ligand. During catalysis, formation of Ru(CO)2(H)2(P‐iPr3)2 is occasionally observed, which is also an active methanol dehydrogenation catalyst.
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Affiliation(s)
- Fenna F van de Watering
- Homogeneous, Supramolecular and Bio-Inspired Catalysis Van't Hoff Institute for Molecular Sciences University of Amsterdam Science Park 904 1098 XH Amsterdam The Netherlands
| | - Martin Lutz
- Crystal and Structural Chemistry, Bijvoet Center for Biomolecular Research Faculty of Science Utrecht University Padualaan 8 3584 CH Utrecht The Netherlands
| | - Wojciech I Dzik
- Homogeneous, Supramolecular and Bio-Inspired Catalysis Van't Hoff Institute for Molecular Sciences University of Amsterdam Science Park 904 1098 XH Amsterdam The Netherlands
| | - Bas de Bruin
- Homogeneous, Supramolecular and Bio-Inspired Catalysis Van't Hoff Institute for Molecular Sciences University of Amsterdam Science Park 904 1098 XH Amsterdam The Netherlands
| | - Joost N H Reek
- Homogeneous, Supramolecular and Bio-Inspired Catalysis Van't Hoff Institute for Molecular Sciences University of Amsterdam Science Park 904 1098 XH Amsterdam The Netherlands
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17
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Asako S, Ishikawa S, Takai K. Synthesis of Linear Allylsilanes via Molybdenum-Catalyzed Regioselective Hydrosilylation of Allenes. ACS Catal 2016. [DOI: 10.1021/acscatal.6b00627] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Sobi Asako
- Division of Applied Chemistry,
Graduate School of Natural Science and Technology, Okayama University, 3-1-1 Tsushimanaka, Kita-ku, Okayama 700-8530, Japan
| | - Sae Ishikawa
- Division of Applied Chemistry,
Graduate School of Natural Science and Technology, Okayama University, 3-1-1 Tsushimanaka, Kita-ku, Okayama 700-8530, Japan
| | - Kazuhiko Takai
- Division of Applied Chemistry,
Graduate School of Natural Science and Technology, Okayama University, 3-1-1 Tsushimanaka, Kita-ku, Okayama 700-8530, Japan
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18
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Takjoo R, Ramasami P, Mague JT, Hasani Z, Rhyman L. Dioxidomolybdenum(VI) complexes of allyl N'-2-hydroxy-3-methoxybenzylidenecarbamohydrazonothioate: synthesis, spectral, and theoretical investigations. J COORD CHEM 2016. [DOI: 10.1080/00958972.2016.1143934] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
Affiliation(s)
- Reza Takjoo
- Faculty of Sciences, Department of Chemistry, Ferdowsi University of Mashhad, Mashhad, Iran
| | - Ponnadurai Ramasami
- Computational Chemistry Group, Department of Chemistry, Faculty of Science, University of Mauritius, Réduit, Mauritius
- Department of Pharmaceutical Chemistry, College of Pharmacy, King Saud University, Riyadh, Saudi Arabia
| | - Joel T. Mague
- Department of Chemistry, Tulane University, New Orleans, LA, USA
| | - Zohreh Hasani
- Faculty of Sciences, Department of Chemistry, Ferdowsi University of Mashhad, Mashhad, Iran
| | - Lydia Rhyman
- Computational Chemistry Group, Department of Chemistry, Faculty of Science, University of Mauritius, Réduit, Mauritius
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19
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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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20
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Reduction of aldehydes catalyzed by oxo-rhenium(V) complexes containing heterocyclic ligands. Tetrahedron Lett 2015. [DOI: 10.1016/j.tetlet.2014.11.119] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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21
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Wang J, Huang L, Yang X, Wei H. Mechanistic Investigation Into Catalytic Hydrosilylation with a High-Valent Ruthenium(VI)–Nitrido Complex: A DFT Study. Organometallics 2014. [DOI: 10.1021/om501071n] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Affiliation(s)
- Jiandi Wang
- Jiangsu Collaborative Innovation
Center of Biomedical Functional Materials, Jiangsu Key Laboratory
of Biomedical Materials, Jiangsu Provincial Key Laboratory for NSLSCS,
College of Chemistry and Materials Science, Nanjing Normal University, 1 Wenyuan Road, Nanjing 210046, People’s Republic of China
| | - Liangfang Huang
- Jiangsu Collaborative Innovation
Center of Biomedical Functional Materials, Jiangsu Key Laboratory
of Biomedical Materials, Jiangsu Provincial Key Laboratory for NSLSCS,
College of Chemistry and Materials Science, Nanjing Normal University, 1 Wenyuan Road, Nanjing 210046, People’s Republic of China
| | - Xiaodi Yang
- Jiangsu Collaborative Innovation
Center of Biomedical Functional Materials, Jiangsu Key Laboratory
of Biomedical Materials, Jiangsu Provincial Key Laboratory for NSLSCS,
College of Chemistry and Materials Science, Nanjing Normal University, 1 Wenyuan Road, Nanjing 210046, People’s Republic of China
| | - Haiyan Wei
- Jiangsu Collaborative Innovation
Center of Biomedical Functional Materials, Jiangsu Key Laboratory
of Biomedical Materials, Jiangsu Provincial Key Laboratory for NSLSCS,
College of Chemistry and Materials Science, Nanjing Normal University, 1 Wenyuan Road, Nanjing 210046, People’s Republic of China
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22
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Pal R, Groy TL, Bowman AC, Trovitch RJ. Preparation and Hydrosilylation Activity of a Molybdenum Carbonyl Complex That Features a Pentadentate Bis(imino)pyridine Ligand. Inorg Chem 2014; 53:9357-65. [DOI: 10.1021/ic501465v] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Raja Pal
- Department of Chemistry & Biochemistry, Arizona State University, Tempe, Arizona 85287, United States
| | - Thomas L. Groy
- Department of Chemistry & Biochemistry, Arizona State University, Tempe, Arizona 85287, United States
| | - Amanda C. Bowman
- Department
of Chemistry, Transylvania University, Lexington, Kentucky 40508, United States
| | - Ryan J. Trovitch
- Department of Chemistry & Biochemistry, Arizona State University, Tempe, Arizona 85287, United States
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23
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Chidara VK, Du G. An Efficient Catalyst Based on Manganese Salen for Hydrosilylation of Carbonyl Compounds. Organometallics 2013. [DOI: 10.1021/om400805v] [Citation(s) in RCA: 64] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Affiliation(s)
- Vamshi K. Chidara
- Department
of Chemistry, University of North Dakota, 151 Cornell Street Stop 9024, Grand Forks, North Dakota 58202, United States
| | - Guodong Du
- Department
of Chemistry, University of North Dakota, 151 Cornell Street Stop 9024, Grand Forks, North Dakota 58202, United States
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24
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Chakraborty S, Blacque O, Fox T, Berke H. Highly Efficient Large Bite Angle Diphosphine Substituted Molybdenum Catalyst for Hydrosilylation. ACS Catal 2013. [DOI: 10.1021/cs4004276] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Subrata Chakraborty
- Institute of Inorganic Chemistry, University of Zürich, Winterthurerstrasse 190, CH-8057 Zürich, Switzerland
| | - Olivier Blacque
- Institute of Inorganic Chemistry, University of Zürich, Winterthurerstrasse 190, CH-8057 Zürich, Switzerland
| | - Thomas Fox
- Institute of Inorganic Chemistry, University of Zürich, Winterthurerstrasse 190, CH-8057 Zürich, Switzerland
| | - Heinz Berke
- Institute of Inorganic Chemistry, University of Zürich, Winterthurerstrasse 190, CH-8057 Zürich, Switzerland
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25
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Khalimon AY, Ignatov SK, Okhapkin AI, Simionescu R, Kuzmina LG, Howard JAK, Nikonov GI. Unusual structure, fluxionality, and reaction mechanism of carbonyl hydrosilylation by silyl hydride complex [(ArN=)Mo(H)(SiH2Ph)(PMe3)3]. Chemistry 2013; 19:8573-90. [PMID: 23671027 DOI: 10.1002/chem.201300376] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2013] [Indexed: 11/12/2022]
Abstract
The reactions of bis(borohydride) complexes [(RN=)Mo(BH4)2(PMe3)2] (4: R = 2,6-Me2C6H3; 5: R = 2,6-iPr2C6H3) with hydrosilanes afford new silyl hydride derivatives [(RN=)Mo(H)(SiR'3)(PMe3)3] (3: R = Ar, R'3 = H2Ph; 8: R = Ar', R'3 = H2Ph; 9: R = Ar, R'3 = (OEt)3; 10: R = Ar, R'3 = HMePh). These compounds can also be conveniently prepared by reacting [(RN=)Mo(H)(Cl)(PMe3)3] with one equivalent of LiBH4 in the presence of a silane. Complex 3 undergoes intramolecular and intermolecular phosphine exchange, as well as exchange between the silyl ligand and the free silane. Kinetic and DFT studies show that the intermolecular phosphine exchange occurs through the predissociation of a PMe3 group, which, surprisingly, is facilitated by the silane. The intramolecular exchange proceeds through a new non-Bailar-twist pathway. The silyl/silane exchange proceeds through an unusual Mo(VI) intermediate, [(ArN=)Mo(H)2(SiH2Ph)2(PMe3)2] (19). Complex 3 was found to be the catalyst of a variety of hydrosilylation reactions of carbonyl compounds (aldehydes and ketones) and nitriles, as well as of silane alcoholysis. Stoichiometric mechanistic studies of the hydrosilylation of acetone, supported by DFT calculations, suggest the operation of an unexpected mechanism, in that the silyl ligand of compound 3 plays an unusual role as a spectator ligand. The addition of acetone to compound 3 leads to the formation of [trans-(ArN)Mo(OiPr)(SiH2Ph)(PMe3)2] (18). This latter species does not undergo the elimination of a Si-O group (which corresponds to the conventional Ojima's mechanism of hydrosilylation). Rather, complex 18 undergoes unusual reversible β-CH activation of the isopropoxy ligand. In the hydrosilylation of benzaldehyde, the reaction proceeds through the formation of a new intermediate bis(benzaldehyde) adduct, [(ArN=)Mo(η(2)-PhC(O)H)2(PMe3)], which reacts further with hydrosilane through a η(1)-silane complex, as studied by DFT calculations.
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Affiliation(s)
- Andrey Y Khalimon
- Chemistry Department, Brock University, 500 Glenridge Avenue, St. Catharines, ON, L2S 3A1, Canada
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26
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Nie K, Gu W, Yao Y, Zhang Y, Shen Q. Synthesis and Characterization of Salalen Lanthanide Complexes and Their Application in the Polymerization of rac-Lactide. Organometallics 2013. [DOI: 10.1021/om4001023] [Citation(s) in RCA: 56] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Kun Nie
- Key Laboratory of
Organic Synthesis
of Jiangsu Province, College of
Chemistry, Chemical Engineering and Materials Science, Dushu Lake Campus, Soochow University, Suzhou 215123, People’s Republic of China
| | - Weikai Gu
- Key Laboratory of
Organic Synthesis
of Jiangsu Province, College of
Chemistry, Chemical Engineering and Materials Science, Dushu Lake Campus, Soochow University, Suzhou 215123, People’s Republic of China
| | - Yingming Yao
- Key Laboratory of
Organic Synthesis
of Jiangsu Province, College of
Chemistry, Chemical Engineering and Materials Science, Dushu Lake Campus, Soochow University, Suzhou 215123, People’s Republic of China
- The Institute of Low Carbon Economy, Suzhou 215123, People’s Republic
of China
| | - Yong Zhang
- Key Laboratory of
Organic Synthesis
of Jiangsu Province, College of
Chemistry, Chemical Engineering and Materials Science, Dushu Lake Campus, Soochow University, Suzhou 215123, People’s Republic of China
| | - Qi Shen
- Key Laboratory of
Organic Synthesis
of Jiangsu Province, College of
Chemistry, Chemical Engineering and Materials Science, Dushu Lake Campus, Soochow University, Suzhou 215123, People’s Republic of China
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27
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Abbina S, Bian S, Oian C, Du G. Scope and Mechanistic Studies of Catalytic Hydrosilylation with a High-Valent Nitridoruthenium(VI). ACS Catal 2013. [DOI: 10.1021/cs300848h] [Citation(s) in RCA: 44] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Affiliation(s)
- Srinivas Abbina
- Department
of Chemistry, University of North Dakota, 151 Cornell Street Stop 9024, Grand Forks,
North Dakota 58202, United States
| | - Shi Bian
- Department
of Chemistry, University of North Dakota, 151 Cornell Street Stop 9024, Grand Forks,
North Dakota 58202, United States
| | - Casey Oian
- Department
of Chemistry, University of North Dakota, 151 Cornell Street Stop 9024, Grand Forks,
North Dakota 58202, United States
| | - Guodong Du
- Department
of Chemistry, University of North Dakota, 151 Cornell Street Stop 9024, Grand Forks,
North Dakota 58202, United States
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28
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Riisiö A, Lehtonen A, Hänninen MM, Sillanpää R. Synthesis, Structure and Catalytic Properties of Dinuclear Mo
VI
Complexes with Ditopic Diaminotetraphenols. Eur J Inorg Chem 2013. [DOI: 10.1002/ejic.201201234] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Antti Riisiö
- Department of Chemistry, University of Jyväskylä, P. O. Box 35, 40014 Jyväskylä, Finland, http://www.jyu.fi
| | - Ari Lehtonen
- Department of Chemistry, University of Turku, Vatselankatu 2, 20014 Turun yliopisto, Finland, http://www.utu.fi
| | - Mikko M. Hänninen
- Department of Chemistry, University of Jyväskylä, P. O. Box 35, 40014 Jyväskylä, Finland, http://www.jyu.fi
| | - Reijo Sillanpää
- Department of Chemistry, University of Jyväskylä, P. O. Box 35, 40014 Jyväskylä, Finland, http://www.jyu.fi
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29
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Dioxomolybdenum(VI) complexes with linear and tripodal tetradenate ligands: Synthesis, structures and their use as olefin epoxidation catalysts. Polyhedron 2013. [DOI: 10.1016/j.poly.2012.10.022] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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30
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Khalimon AY, Sherbrooke O, Peterson E, Simionescu R, Kuzmina LG, Howard JAK, Nikonov GI. Mechanistic aspects of hydrosilylation catalyzed by (ArN=)Mo(H)(Cl)(PMe3)3. Inorg Chem 2012; 51:4300-13. [PMID: 22435952 DOI: 10.1021/ic300010c] [Citation(s) in RCA: 42] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The reaction of (ArN=)MoCl(2)(PMe(3))(3) (Ar = 2,6-diisopropylphenyl) with L-Selectride gives the hydrido-chloride complex (ArN=)Mo(H)(Cl)(PMe(3))(3) (2). Complex 2 was found to catalyze the hydrosilylation of carbonyls and nitriles as well as the dehydrogenative silylation of alcohols and water. Compound 2 does not show any productive reaction with PhSiH(3); however, a slow H/D exchange and formation of (ArN=)Mo(D)(Cl)(PMe(3))(3) (2(D)) was observed upon addition of PhSiD(3). Reactivity of 2 toward organic substrates was studied. Stoichiometric reactions of 2 with benzaldehyde and cyclohexanone start with dissociation of the trans-to-hydride PMe(3) ligand followed by coordination and insertion of carbonyls into the Mo-H bond to form alkoxy derivatives (ArN=)Mo(Cl)(OR)(PMe(2))L(2) (3: R = OCH(2)Ph, L(2) = 2 PMe(3); 5: R = OCH(2)Ph, L(2) = η(2)-PhC(O)H; 6: R = OCy, L(2) = 2 PMe(3)). The latter species reacts with PhSiH(3) to furnish the corresponding silyl ethers and to recover the hydride 2. An analogous mechanism was suggested for the dehydrogenative ethanolysis with PhSiH(3), with the key intermediate being the ethoxy complex (ArN=)Mo(Cl)(OEt)(PMe(3))(3) (7). In the case of hydrosilylation of acetophenone, a D-labeling experiment, i.e., a reaction of 2 with acetophenone and PhSiD(3) in the 1:1:1 ratio, suggests an alternative mechanism that does not involve the intermediacy of an alkoxy complex. In this particular case, the reaction presumably proceeds via Lewis acid catalysis. Similar to the case of benzaldehyde, treatment of 2 with styrene gives trans-(ArN=)Mo(H)(η(2)-CH(2)═CHPh)(PMe(3))(2) (8). Complex 8 slowly decomposes via the release of ethylbenzene, indicating only a slow insertion of styrene ligand into the Mo-H bond of 8.
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Affiliation(s)
- Andrey Y Khalimon
- Chemistry Department, Brock University, 500 Glenridge Avenue, St. Catharines, Ontario L2S 3A1, Canada
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31
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Achard TR, Clegg W, Harrington RW, North M. Chiral salen ligands designed to form polymetallic complexes. Tetrahedron 2012. [DOI: 10.1016/j.tet.2011.10.084] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/15/2022]
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32
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Pehlivan L, Métay E, Laval S, Dayoub W, Delbrayelle D, Mignani G, Lemaire M. Reduction of Aromatic and Aliphatic Esters Using the Reducing Systems MoO2(acac)2 or V(O)(OiPr)3 in Combination with 1,1,3,3-Tetramethyldisiloxane. European J Org Chem 2011. [DOI: 10.1002/ejoc.201101016] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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33
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Sherbrooke O, Kuzmina LG, Nikonov GI. Nonhydride mechanism of metal-catalyzed hydrosilylation. J Am Chem Soc 2011; 133:6487-9. [PMID: 21476545 DOI: 10.1021/ja111748u] [Citation(s) in RCA: 60] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
A 1:1:1 reaction between complex (Tp)(ArN═)Mo(H)(PMe(3)) (3), silane PhSiD(3), and carbonyl substrate established that hydrosilylation catalyzed by 3 is not accompanied by deuterium incorporation into the hydride position of the catalyst, thus ruling out the conventional hydride mechanism based on carbonyl insertion into the M-H bond. An analogous result was observed for the catalysis by (O═)(PhMe(2)SiO)Re(PPh(3))(2)(I)(H) and (Ph(3)PCuH)(6).
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Affiliation(s)
- Oleg Sherbrooke
- Chemistry Department, Brock University, 500 Glenridge Avenue, St. Catharines, Ontario L2S 3A1, Canada
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34
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Truong TV, Kastl EA, Du G. Cationic nitridoruthenium(VI) catalyzed hydrosilylation of ketones and aldehydes. Tetrahedron Lett 2011. [DOI: 10.1016/j.tetlet.2011.01.139] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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35
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Brito JA, Royo B, Gómez M. An overview of chiral molybdenum complexes applied in enantioselective catalysis. Catal Sci Technol 2011. [DOI: 10.1039/c1cy00123j] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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36
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Mayilmurugan R, Harum BN, Volpe M, Sax AF, Palaniandavar M, Mösch‐Zanetti NC. Mechanistic Insight into the Reactivity of Oxotransferases by Novel Asymmetric Dioxomolybdenum(VI) Model Complexes. Chemistry 2010; 17:704-13. [DOI: 10.1002/chem.201001177] [Citation(s) in RCA: 44] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2010] [Revised: 08/27/2010] [Indexed: 11/06/2022]
Affiliation(s)
- Ramasamy Mayilmurugan
- Institut für Chemie, Bereich Anorganische Chemie, Karl‐Franzens‐Universität Graz, Schubertstrasse 1, 8010, Graz (Austria), Fax: (+43) 316‐380‐9835
| | - Bastian N. Harum
- Institut für Chemie, Bereich Anorganische Chemie, Karl‐Franzens‐Universität Graz, Schubertstrasse 1, 8010, Graz (Austria), Fax: (+43) 316‐380‐9835
| | - Manuel Volpe
- Institut für Chemie, Bereich Anorganische Chemie, Karl‐Franzens‐Universität Graz, Schubertstrasse 1, 8010, Graz (Austria), Fax: (+43) 316‐380‐9835
| | - Alexander F. Sax
- Institut für Chemie, Bereich Physikalische und Theoretische Chemie, Karl‐Franzens‐Universität Graz, Heinrichstrasse 28/VI, 8010, Graz (Austria)
| | | | - Nadia C. Mösch‐Zanetti
- Institut für Chemie, Bereich Anorganische Chemie, Karl‐Franzens‐Universität Graz, Schubertstrasse 1, 8010, Graz (Austria), Fax: (+43) 316‐380‐9835
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37
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Sherbrooke O, Gorelsky SI, Simionescu R, Kuzmina LG, Nikonov GI. The unexpected mechanism of carbonyl hydrosilylation catalyzed by (Cp)(ArN[double bond, length as m-dash])Mo(H)(PMe(3)). Chem Commun (Camb) 2010; 46:7831-7833. [PMID: 20856991 DOI: 10.1039/c0cc01850c] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/24/2024]
Abstract
Complex (Cp)(ArN[double bond, length as m-dash])Mo(H)(PMe(3)) (2, Ar = 2,6-diisopropylphenyl) catalyzes the hydrosilylation of carbonyls by an unexpected associative mechanism. Complex 2 also reacts with PhSiH(3) by a σ-bond metathesis mechanism to give the silyl derivative (Cp)(ArN[double bond, length as m-dash])Mo(SiH(2)Ph)(PMe(3)).
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Affiliation(s)
- Oleg Sherbrooke
- Chemistry Department, Brock University, 500 Glenridge Avenue, St. Catharines, ON, Canada, L2S 3A1.
| | - Serge I Gorelsky
- Center for Catalysis Research and Innovation, University of Ottawa, 30 Marie Curie Street, Ottawa, ON, Canada, K1N 6N5.
| | - Razvan Simionescu
- Chemistry Department, Brock University, 500 Glenridge Avenue, St. Catharines, ON, Canada, L2S 3A1.
| | - Lyudmila G Kuzmina
- Kurnakov Institute of General and Inorganic Chemistry, 31 Leninsky prospect, Moscow, 119991, Russia.
| | - Georgii I Nikonov
- Chemistry Department, Brock University, 500 Glenridge Avenue, St. Catharines, ON, Canada, L2S 3A1.
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38
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Nolin KA, Ahn RW, Kobayashi Y, Kennedy-Smith JJ, Toste FD. Enantioselective reduction of ketones and imines catalyzed by (CN-box)Re(V)-oxo complexes. Chemistry 2010; 16:9555-62. [PMID: 20623567 PMCID: PMC3517119 DOI: 10.1002/chem.201001164] [Citation(s) in RCA: 90] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Abstract
The development and application of chiral, non-racemic Re(V)-oxo complexes to the enantioselective reduction of prochiral ketones is described. In addition to the enantioselective reduction of prochiral ketones, we report the application of these complexes to 1) a tandem Meyer-Schuster rearrangement/reduction to access enantioenriched allylic alcohols and 2) the enantioselective reduction of imines.
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Affiliation(s)
- Kristine A Nolin
- Department of Chemistry, University of California, Berkeley, Berkeley, CA 94720, USA
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