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Geisenhoff JQ, Yin H, Oget N, Chang H, Chen L, Schimpf AM. Controlled CO labilization of tungsten carbonyl precursors for the low-temperature synthesis of tungsten diselenide nanocrystals. FRONTIERS IN NANOTECHNOLOGY 2022. [DOI: 10.3389/fnano.2022.1026635] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
Abstract
We report a low-temperature colloidal synthesis of WSe2 nanocrystals from tungsten hexacarbonyl and diphenyl diselenide in trioctylphosphine oxide (TOPO). We identify TOPO-substituted intermediates, W(CO)5TOPO and cis-W(CO)4(TOPO)2 by infrared spectroscopy. To confirm these assignments, we synthesize aryl analogues of phosphine-oxide-substituted intermediates, W(CO)5TPPO (synthesized previously, TPPO = triphenylphosphine oxide) and cis-W(CO)4(TPPO)2 and fac-W(CO)3(TPPO)3 (new structures reported herein). Ligation of the tungsten carbonyl by either the alkyl or aryl phosphine oxides results in facile labilization of the remaining CO, enabling low-temperature decomposition to nucleate WSe2 nanocrystals. The reactivity in phosphine oxides is contrasted with syntheses containing phosphine ligands, where substitution results in decreased CO labilization and higher temperatures are required to induce nanocrystal nucleation.
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2
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Yang L, Nesterov VN, Richmond MG. Bimodal substitution behavior in the reaction of N,N’-diisopropylformamidine with [Os3(CO)10(NCMe)2]: Kinetics and molecular structures of the formamidinate-substituted clusters HOs3(CO)9[μ-C(O)NPr C(H)NPr ], HOs3(CO)10[μ-NPr C(H)NPr ], and HOs3(CO)9[μ3-NPr C(H)NPr ]. J Organomet Chem 2021. [DOI: 10.1016/j.jorganchem.2021.121709] [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]
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3
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King AP, Gellineau HA, MacMillan SN, Wilson JJ. Physical properties, ligand substitution reactions, and biological activity of Co(iii)-Schiff base complexes. Dalton Trans 2019; 48:5987-6002. [PMID: 30672949 PMCID: PMC6504617 DOI: 10.1039/c8dt04606a] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
Four cobalt(iii) complexes of the general formula [Co(Schiff base)(L)2]+, where L is ammonia (NH3) or 3-fluorobenzylamine (3F-BnNH2), were synthesized. The complexes were characterized by NMR spectroscopy, mass spectrometry, and X-ray crystallography. Their electrochemical properties, ligand substitution mechanisms, and ligand exchange rates in aqueous buffer were investigated. These physical properties were correlated to the cellular uptake and anticancer activities of the complexes. The complexes undergo sequential, dissociative ligand substitution, with the exchange rates depending heavily on the axial ligands. Eyring analyses revealed that the relative ligand exchange rates were largely impacted by differences in the entropy, rather than enthalpy, of activation for the complexes. Performing the substitution reactions in the presence of ascorbate led to a change in the reaction profile and kinetics, but no change in the final product. The cytotoxic activity of the complexes correlates with both the ligand exchange rate and reduction potential, with the more easily reduced and rapidly substituted complexes showing higher toxicity. These relationships may be valuable for the rational design of Co(iii) complexes as anticancer or antiviral prodrugs.
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Affiliation(s)
- A Paden King
- Department of Chemistry and Chemical Biology, Cornell University, Ithaca, NY 14853, USA.
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4
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Kinetic studies of thermal dissociation of carbon monoxide ligands from manganese tri- and tetra-carbonyl derivatives containing the bulky dipiperidylmethane ligand, CH2Pip2. Inorganica Chim Acta 2019. [DOI: 10.1016/j.ica.2018.09.004] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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5
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Van Ausdall BR, Cuddy MF, Southern JS, Wheeler KA, Keiter EA, Treadwell EM, Keiter RL. Three Isomers in Equilibrium: Phosphine Exchange of Coordinated and Pendant Phosphines in a Unique Complex, (OC) 5WL (L = 1,2-Bis(diphenylphosphino)-1-di- p-tolylphosphinoethane), and Implications for Understanding the k2 Term in the Rate Law for Phosphine Substitution in Group 6 Metal Carbonyl Complexes. Organometallics 2018. [DOI: 10.1021/acs.organomet.8b00471] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Bret R. Van Ausdall
- Department of Chemistry, Eastern Illinois University, Charleston, Illinois 61920, United States
| | - Michael F. Cuddy
- Department of Chemistry, Northwest College, Powell, Wyoming 82435, United States
| | - Joel S. Southern
- Department of Chemistry, Eastern Illinois University, Charleston, Illinois 61920, United States
| | - Kraig A. Wheeler
- Department of Chemistry, Whitworth University, Spokane, Washington 99251, United States
| | - Ellen A. Keiter
- Department of Chemistry, Eastern Illinois University, Charleston, Illinois 61920, United States
| | - Edward M. Treadwell
- Department of Chemistry, Eastern Illinois University, Charleston, Illinois 61920, United States
| | - Richard L. Keiter
- Department of Chemistry, Eastern Illinois University, Charleston, Illinois 61920, United States
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Asali KJ, El-khateeb M, Foudeh Y, Abul-Futouh H. Kinetics and mechanism of ligand substitution reactions in [cis-M(CO)4(amine)(EPh3)] complexes (M = Mo, W; amine = pyridine, piperidine; E = As, Sb). J COORD CHEM 2017. [DOI: 10.1080/00958972.2017.1402117] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Affiliation(s)
- Khalil J. Asali
- Department of Chemistry, Jordan University of Science and Technology, Irbid, Jordan
| | - Mohammad El-khateeb
- Department of Chemistry, Jordan University of Science and Technology, Irbid, Jordan
| | - Yousef Foudeh
- Department of Chemistry, Jordan University of Science and Technology, Irbid, Jordan
| | - Hassan Abul-Futouh
- Institut für Anorganische und Analytische Chemie, Friedrich-Schiller-Universität Jena, Jena, Germany
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7
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Mayberry DD, Nesterov VN, Richmond MG. Ambidentate Ligand Reactivity with the Rhenium(I) Compounds [BrRe(CO)
4
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2
and
cis
‐BrRe(CO)
4
L: A Kinetic and Mechanistic Study. Eur J Inorg Chem 2017. [DOI: 10.1002/ejic.201700538] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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8
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Dangling phosphine complexes: Phosphine exchange in pentacarbonyl tungsten complexes of bis(diphenylphosphinomethyl)phenylphosphine. J Organomet Chem 2015. [DOI: 10.1016/j.jorganchem.2015.07.017] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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9
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Intramolecular exchange of coordinated and dangling phosphines in pentacarbonyl group 6 complexes of 1,1,2-tris(diphenylphosphino)ethane. Inorganica Chim Acta 2010. [DOI: 10.1016/j.ica.2010.08.039] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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10
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Huang SH, Keith JM, Hall MB, Richmond MG. Ortho-Metalation Dynamics and Ligand Fluxionality in the Conversion of Os3(CO)10(dppm) to HOs3(CO)8[μ-PhP(C6H4-μ2,η1)CH2PPh2]: Experimental and DFT Evidence for the Participation of Agostic C−H and π-Aryl Intermediates at an Intact Triosmium Cluster. Organometallics 2010. [DOI: 10.1021/om100475v] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Shih-Huang Huang
- Department of Chemistry, University of North Texas, Denton, Texas 76203
| | - Jason M. Keith
- Department of Chemistry, Texas A&M University, College Station, Texas 77843
| | - Michael B. Hall
- Department of Chemistry, Texas A&M University, College Station, Texas 77843
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Swennenhuis BHG, Poland R, Fan WY, Darensbourg DJ, Bengali AA. Ligand Substitution from the (η5-DMP)Mn(CO)2(Solv) [DMP = 2,5-dimethylpyrrole, Solv = solvent] Complexes: To Ring Slip or Not to Ring Slip? Inorg Chem 2010; 49:7597-604. [DOI: 10.1021/ic101123y] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
| | - Ross Poland
- Department of Chemistry, Texas A&M University, College Station, Texas 77843-3255
| | - Wai Yip Fan
- Department of Chemistry, National University of Singapore, 3 Science Drive, Singapore 117543
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Hudnall TW, Bielawski CW. An N,N′-Diamidocarbene: Studies in C−H Insertion, Reversible Carbonylation, and Transition-Metal Coordination Chemistry. J Am Chem Soc 2009; 131:16039-41. [DOI: 10.1021/ja907481w] [Citation(s) in RCA: 260] [Impact Index Per Article: 17.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Affiliation(s)
- Todd W. Hudnall
- Department of Chemistry and Biochemistry, The University of Texas at Austin, Austin, Texas 78712
| | - Christopher W. Bielawski
- Department of Chemistry and Biochemistry, The University of Texas at Austin, Austin, Texas 78712
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13
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CO substitution in HRu3(CO)10(μ-COMe) by the unsaturated diphosphine ligand 4,5-bis(diphenylphosphino)-4-cyclopenten-1,3-dione (bpcd): Synthesis and reactivity studies of the face-capped cluster Ru3(CO)7(μ3-COMe)[μ-P(Ph)CC(PPh2)C(O)CH2C(O)]. J Organomet Chem 2008. [DOI: 10.1016/j.jorganchem.2008.04.007] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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14
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Shagal A, Schultz RH. Linkage Isomerization in M(CO)5(DHF) Complexes (M = Cr, Mo, W; DHF = 2,3-Dihydrofuran, 2,5-Dihydrofuran) Studied by Time-Resolved Infrared Absorption Spectroscopy. Organometallics 2002. [DOI: 10.1021/om020084f] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- A. Shagal
- Department of Chemistry, Bar-Ilan University, 52900 Ramat-Gan, Israel
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17
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Krogh-Jespersen K, Czerw M, Zhu K, Singh B, Kanzelberger M, Darji N, Achord PD, Renkema KB, Goldman AS. Combined computational and experimental study of substituent effects on the thermodynamics of H(2), CO, arene, and alkane addition to iridium. J Am Chem Soc 2002; 124:10797-809. [PMID: 12207536 DOI: 10.1021/ja010547t] [Citation(s) in RCA: 115] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The thermodynamics of small-molecule (H(2), arene, alkane, and CO) addition to pincer-ligated iridium complexes of several different configurations (three-coordinate d(8), four-coordinate d(8), and five-coordinate d(6)) have been investigated by computational and experimental means. The substituent para to the iridium (Y) has been varied in complexes containing the (Y-PCP)Ir unit (Y-PCP = eta(3)-1,3,5-C(6)H(2)[CH(2)PR(2)](2)Y; R = methyl for computations; R = tert-butyl for experiments); substituent effects have been studied for the addition of H(2), C-H, and CO to the complexes (Y-PCP)Ir, (Y-PCP)Ir(CO), and (Y-PCP)Ir(H)(2). Para substituents on arenes undergoing C-H bond addition to (PCP)Ir or to (PCP)Ir(CO) have also been varied computationally and experimentally. In general, increasing electron donation by the substituent Y in the 16-electron complexes, (Y-PCP)Ir(CO) or (Y-PCP)Ir(H)(2), disfavors addition of H-H or C-H bonds, in contradiction to the idea of such additions being oxidative. Addition of CO to the same 16-electron complexes is also disfavored by increased electron donation from Y. By contrast, addition of H-H and C-H bonds or CO to the three-coordinate parent species (Y-PCP)Ir is favored by increased electron donation. In general, the effects of varying Y are markedly similar for H(2), C-H, and CO addition. The trends can be fully rationalized in terms of simple molecular orbital interactions but not in terms of concepts related to oxidation, such as charge-transfer or electronegativity differences.
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Affiliation(s)
- Karsten Krogh-Jespersen
- Department of Chemistry and Chemical Biology, Rutgers, The State University of New Jersey, New Brunswick, NJ 08903, USA.
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18
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Jiang F, Jenkins HA, Green DF, Yap GPA, Pomeroy RK. A novel metal-chain extension reaction: synthesis of (X)[Os(CO)3(CN-t-Bu)]nMn(CO)5 (X = Cl, Br, I; n = 1, 2, 3). CAN J CHEM 2002. [DOI: 10.1139/v02-016] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Complexes of formula (X)[Os(CO)3(CN-t-Bu)]nMn(CO)5 (X = Cl, Br, I; n = 1, 2, 3) have been prepared by the reaction of Os(CO)4(CN-t-Bu) with Mn(CO)5(X) in hexane at room temperature. The characterization of the complexes included the crystal structures of compounds with X = I, n = 1, 3 and X = Cl, Br, n = 2 (2ClA and 2BrB). The trinuclear products were isolated as two isomers. The major isomer (2XA) has an isocyanide ligand attached to each osmium atom, whereas the minor isomer (2XB) has both of these ligands bound to the terminal Os atom. The structures contain OsnMn chains with unbridged OsMn bonds (range of lengths are 2.870(1)2.9245(8) Å) and for compounds with n = 2 or 3 OsOs bonds (range of lengths are 2.8812(4)2.8928(5) Å). The mechanism of formation is believed to involve replacement of a CO ligand with the 18e- ligand Os(CO)4(CN-t-Bu) at the metal with the coordinated halide, followed by a rearrangement in which the halide ligand migrates to the donor Os atom with concomitant migration in the reverse direction of a carbonyl ligand. The preparation of (OC)4(t-BuNC)OsMn(CO)4(Cl) with an OsMn dative bond is also reported along with the (OC)4(t-BuNC)OsRe(CO)4(X) analogues.Key words: manganeseosmium, rheniumosmium, dinuclear, metal chain, dative metalmetal bond.
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Goj LA, Widenhoefer RA. Mechanistic studies of the cycloisomerization of dimethyl diallylmalonate catalyzed by a cationic palladium phenanthroline complex. J Am Chem Soc 2001; 123:11133-47. [PMID: 11697956 DOI: 10.1021/ja0108685] [Citation(s) in RCA: 42] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The mechanism of the cycloisomerization of dimethyl diallylmalonate (1) catalyzed by the cationic palladium phenanthroline complex [(phen)Pd(Me)CNCH(3)](+)[BAr(4)](-) [Ar = 3,5-C(6)H(3)(CF(3))(2)] (2) has been investigated. Heating a solution of 1 and 2 (5 mol %) in DCE at 40 degrees C led to zero-order decay of 1 to approximately 80% conversion (k(obs) = (7.1 +/- 0.3) x 10(-7) M s(-1)) with formation of a 27:2.2:1.0 mixture of 3,3-bis(carbomethoxy)-1,5-dimethylcyclopentene (3), 4,4-bis(carbomethoxy)-1,2-dimethylcyclopentene (4), and 1,1-bis(carbomethoxy)-4-methyl-3-methylenecyclopentane (5) and traces ( approximately 3.5%) of ethyl-substituted carbocycles 6 of the chemical formula C(12)H(18)O(4). Cyclopentenes 3 and 4 were formed both kinetically (3:4 = 30:1 at 40 degrees C) and via secondary isomerization of 5 (3:4 = 1:2.5 at 40 degrees C); the kinetic pathway accounted for the 93% of cyclopentene formation at 40 degrees C. Carbocycles 6 were formed predominantly (> or =90%) within the first two catalyst turnovers as byproducts of catalyst activation. Stoichiometric reaction of 1 and 2 at room temperature for 1.5 h led to the isolation of the palladium cyclopentyl chelate complex [carbohydrate structure-see text] in 26% yield as a approximately 2:1 mixture of isomers. The structure of trans,trans-7 was determined by X-ray crystallography. Kinetic studies of the formation of 7 established the rate law: rate = k[1][2], where k = (2.1 +/- 0.3) x 10(-2) M(-1) s(-1) (Delta G(*)(298K) = 19.7 +/- 0.1 kcal mol(-1)) at 25 degrees C. Thermolysis of 7 at 50 degrees C formed carbocycles 6 in 65% yield by GC analysis. (1)H and (13)C NMR analysis of an active catalyst system generated from 1 and a catalytic amount of 2 led to the identification of the cyclopentyl chelate complex [carbohydrate structure-see text] as the catalyst resting state. Cycloisomerization of 1-2,6-d(2) formed predominantly (approximately 90%) 3,3-bis(carbomethoxy)-5-deuterio-1-(deuteriomethyl)-5-methylcyclopentene (3-d(2)); no significant (< or =10%) kinetic isotope effect or intermolecular H/D exchange was observed. Cycloisomerization of 1-3,3,5,5-d(4) formed a 1:2.6 mixture of 3,3-bis(carbomethoxy)-2,4,4-trideuterio-1,5-dimethylcyclopentene (3-d(3)) and 3,3-bis(carbomethoxy)-2,4,4-trideuterio-5-(deuteriomethyl)-1-methylcyclo pentene (3-d(4)); while no significant (< or =10%) kinetic isotope effect was detected, extensive intermolecular H/D exchange was observed. These data are consistent with a mechanism involving hydrometalation of an olefin of 1, intramolecular carbometalation, isomerization via reversible beta-hydride elimination/addition, and turnover-limiting displacement of the cyclopentenes from palladium.
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Affiliation(s)
- L A Goj
- P. M. Gross Chemical Laboratory, Duke University, Durham, North Carolina 27708-0346, USA
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20
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Kinetics and substitution mechanism in the reaction of the seven-coordinate complexes bis-μ-diphenylphosphido- and bis-μ-dimethylphosphido-octacarbonyldimolybdenum (MoMo) with tri-n-butyl-phosphine. Inorganica Chim Acta 2001. [DOI: 10.1016/s0020-1693(01)00521-7] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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21
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Lang H, Rheinwald G, Lay U, Zsolnai L, Huttner G. Synthese und Reaktionsverhalten von (η2-BrCCR)Co2(CO)6. Die Festkörperstruktur von Pentacarbonyl-[μ-(1,2,3,4-η:1,4-η)-1,4-diphenyl-1,3-butadien-1,4-diyl]dicobalt. J Organomet Chem 2001. [DOI: 10.1016/s0022-328x(01)01087-7] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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22
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Salmain M, Jaouen G, Fiedler J, Sokolová R, Pospíšil L. Mechanism of Reduction of Cymantrene (Tricarbonyl η5-Cyclopentadienylmanganese) and Its Methyl Carboximidate Derivative. ACTA ACUST UNITED AC 2001. [DOI: 10.1135/cccc20010155] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
The mechanisms of electrochemical reduction of cymantrene, [Mn(CO)3(η5-Cp)], and its ring-substituted methyl carboximidate derivative, [Mn(CO)3(η5-C5H4C(NH)OMe)], were studied by voltammetry, in situ IR spectroelectrochemistry and preparative electrolysis. The product of one-electron reduction undergoes further chemical reactions. Comparison of the data obtained under atmosphere of argon and that of carbon monoxide leads to the conclusion that a ligand substitution reaction and dimerization participate in the overall reaction sequence. FTIR spectra recorded in situ suggest product dimerization, the formation of [Mn(CO)5]- and, to a lesser extent, other unstable species. The dimer formation was not observed in the course of the reduction of the carboximidate.
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Jiang F, Jenkins HA, Yap GP, Pomeroy RK. The metal-chain complexes (X)[Os(CO)3(CNBut)]3Mn(CO)5 (X=Cl, Br, I). INORG CHEM COMMUN 2000. [DOI: 10.1016/s1387-7003(00)00173-8] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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24
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Macgregor SA, MacQueen D. Theoretical Study of the Electronic Structure of Group 6 [M(CO)(5)X](-) Species (X = NH(2), OH, Halide, H, CH(3)) and a Reinvestigation of the Role of pi-Donation in CO Lability. Inorg Chem 1999; 38:4868-4876. [PMID: 11671218 DOI: 10.1021/ic990355n] [Citation(s) in RCA: 39] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Density functional calculations have been employed to investigate the electronic structure of [M(CO)(5)X](-) species (M = Cr, Mo, W; X = NH(2), OH, halide, H, CH(3)) and to compute CO ligand dissociation energies. The calculations indicate that CO loss is most facile from the cis position, and CO dissociation energies are computed to increase along the series X = NH(2) < OH < F < Cl < Br < I < CH(3) < H. These results are in agreement with available experimental data. Trends in CO dissociation are related to the ability of X to stabilize the unsaturated 16e [M(CO)(4)X](-) species formed. In addition, pi-destabilization of the ground-state [M(CO)(5)X](-) species is equally significant. Analysis of the electronic structure of the 18e species shows that Xpi-dpi 4e destabilization results in hybridization at the metal center which enhances trans M-CO but reduces cis M-CO pi-back-donation. Strong pi-donation from X also induces sigma-antibonding interactions between the metal and the cis CO ligands. A fragment analysis reveals that these effects are strongest for the "hard" fluoride, hydroxide, and amide ligands.
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Affiliation(s)
- Stuart A. Macgregor
- Department of Chemistry, Heriot-Watt University, Riccarton, Edinburgh EH14 4AS, U.K
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Darensbourg DJ, Robertson JB, Larkins DL, Reibenspies JH. Water-Soluble Organometallic Compounds. 7.1 Further Studies of 1,3,5-Triaza-7-Phosphaadamantane Derivatives of Group 10 Metals, Including Metal Carbonyls and Hydrides. Inorg Chem 1999. [DOI: 10.1021/ic981243j] [Citation(s) in RCA: 65] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Donald J. Darensbourg
- Department of Chemistry, Texas A&M University, P.O. Box 30012, College Station, Texas 77842-3012
| | - Jeffrey B. Robertson
- Department of Chemistry, Texas A&M University, P.O. Box 30012, College Station, Texas 77842-3012
| | - David L. Larkins
- Department of Chemistry, Texas A&M University, P.O. Box 30012, College Station, Texas 77842-3012
| | - Joseph H. Reibenspies
- Department of Chemistry, Texas A&M University, P.O. Box 30012, College Station, Texas 77842-3012
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Schenk WA, Stubbe M, Hagel M. Enantioselective organic syntheses using chiral transition metal complexes V. (2S,3S)-Bis(dibenzophospholyl)butane, a rigid (S,S)-CHIRAPHOS analog. J Organomet Chem 1998. [DOI: 10.1016/s0022-328x(98)00461-6] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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28
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Darensbourg DJ, Draper JD, Larkins DL, Frost BJ, Reibenspies JH. Organometallic Derivatives of Orotic Acid. CO−Labilizing Ability of the Amido Group in Chromium and Tungsten Carbonyl Complexes. Inorg Chem 1998. [DOI: 10.1021/ic980233f] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Donald J. Darensbourg
- Department of Chemistry, Texas A&M University, P.O. Box 300012, College Station, Texas 77842
| | - Jennifer D. Draper
- Department of Chemistry, Texas A&M University, P.O. Box 300012, College Station, Texas 77842
| | - David L. Larkins
- Department of Chemistry, Texas A&M University, P.O. Box 300012, College Station, Texas 77842
| | - Brian J. Frost
- Department of Chemistry, Texas A&M University, P.O. Box 300012, College Station, Texas 77842
| | - Joseph H. Reibenspies
- Department of Chemistry, Texas A&M University, P.O. Box 300012, College Station, Texas 77842
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The propensity of alkoxide and aryloxide derivatives of tungsten carbonyls to aggregate in solution. Synthesis and X-ray structures of dinuclear, trinuclear and tetranuclear complexes derived from the MeOW(CO)5− anion. Inorganica Chim Acta 1998. [DOI: 10.1016/s0020-1693(97)05996-3] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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Asali KJ, Smit JP, Ladogana S, Dobson GR. Fast non-dissociative cis-to-trans isomerization in the cis-(P(O-i-Pr)3)2Cr(CO)4 intermediate. INORG CHEM COMMUN 1998. [DOI: 10.1016/s1387-7003(98)00022-7] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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Downs AJ, Greene TM. Coming to Grips with Reactive Intermediates. ADVANCES IN INORGANIC CHEMISTRY 1998. [DOI: 10.1016/s0898-8838(08)60150-6] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Darensbourg DJ, Draper JD, Reibenspies JH. Amino Acid Complexes of Metal Carbonyls: Mechanistic Aspects of the CO-Labilizing Ability of Glycinate Ligands in Zero-Valent Chromium and Tungsten Derivatives. Inorg Chem 1997; 36:3648-3656. [PMID: 11670056 DOI: 10.1021/ic961344m] [Citation(s) in RCA: 23] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The amino and phosphino acid derivatives of chromium(0) and tungsten(0), [Et(4)N][Cr(CO)(4)(O(2)CCH(2)NH(2))] (1), [Et(4)N][Cr(CO)(4)(O(2)CCH(2)NHMe)] (2), [Et(4)N][Cr(CO)(4)(O(2)CCH(2)NMe(2))] (3), [Et(4)N][W(CO)(4)(O(2)CCH(C(CH(3))(3))NH(2))] (4), [Et(4)N][W(CO)(4)(O(2)CCH(C(6)H(5))NH(2))], [Et(4)N][W(CO)(4)(O(2)CCH(2)PPh(2))] (5), and [Et(4)N][Cr(CO)(4)(O(2)CCH(2)PPh(2))] have been synthesized from the reaction of the M(CO)(5)THF adduct with the tetraethylammonium salt of the corresponding amino or phosphino acid in THF solution. The complexes have been characterized in solution by (13)C NMR and infrared spectroscopies and in the solid state by X-ray crystallography. The geometry of the metal anion is, in each case, that of a distorted octahedron consisting of four carbonyl ligands and a puckered five-membered glycinate chelate ring, bound through the nitrogen atom and one of its oxygen atoms. Notable about complex 1 is that the crystal obtained exhibited both a different morphology and a different space group than its tungsten analogue. Examination of the packing diagram reveals that this change is due to the different orientation of the chelate ring in 1 relative to the corresponding orientation in the W(CO)(4)(O(2)CCH(2)NH(2))(-) anion. Complexes 1 and 2 exhibit intermolecular hydrogen-bonding interactions between the amine N-H group and the distal oxygen on an adjacent molecule, with N.O distances of 2.828 and 2.821 Å, respectively. Investigations of the lability of the carbonyl ligands have been carried out. The lability is proposed to be due to base-assisted removal of a proton from the amine ligand leading to a substitutionally labile amide transient species. The tungsten analogue of complex 1 was used to obtain evidence in support of this mechanism. The isotope effect (k(H)/k(D)) was measured for W(CO)(4)(O(2)CCH(2)NH(2))(-) using d(5)-glycine and was found to be 2.34. The activation parameters for the intermolecular exchange of CO in the [Et(4)N][W(CO)(4)(O(2)CCH(2)NH(2))] salt were determined and found to be DeltaH() = 15.4 +/- 1.0 kcal/mol and DeltaS() = -23.2 +/- 3.2 eu, values consistent with the proposed mechanism. In addition, the effect of substitution of electron-donating (C(CH(3))(3)) and electron-withdrawing (C(6)H(5)) substituents on the methylene carbon was evaluated. There was little change in the rate of CO exchange observed for W(CO)(4)(O(2)CCH(C(CH(3))(3))NH(2))(-) (5) and W(CO)(4)(O(2)CCH(C(6)H(5))NH(2))(-) vs W(CO)(4)(O(2)CCH(2)NH(2))(-), showing that steric or electronic effects away from the N center are not responsible for the observed CO lability. As anticipated on the basis of the proposed substitutional pathway, the phosphino acid metal carbonyl derivatives did not exhibit facile intermolecular CO exchange.
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Hudson RH, Poë AJ. Systematic CO dissociation kinetics of (μ2-H)(H)Os3(CO)10L, clusters (L = P-donor ligands). Inorganica Chim Acta 1997. [DOI: 10.1016/s0020-1693(97)05466-2] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Kiplinger JL, Richmond TG. Preparation of molybdenum(II) η2-vinyl complexes via sequential CCl activation and alkyne insertion. Polyhedron 1997. [DOI: 10.1016/0277-5387(96)00311-7] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Yang K, Martin JA, Bott SG, Richmond MG. Diyne and Phosphorus−Carbon Bond Reactivity in the Reaction between [Co2(CO)6]2(PhC4Ph) and 2,3-Bis(diphenylphosphino)maleic Anhydride (bma). Syntheses, Molecular Orbital Properties, and X-ray Diffraction Structures of Co2(CO)4[μ-η2:η2:η1:η1-(Z)-Ph2P(Ph)CC(PhC2)- CC(Ph2P)C(O)OC(O)], Co2(CO)2(bma)2·CH2Cl2, and Co2(CO)2(bma)[μ-CC(Ph2P)C(O)OC(O)](μ2-Ph2P)·C6H14. Organometallics 1996. [DOI: 10.1021/om950988j] [Citation(s) in RCA: 20] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Kaiyuan Yang
- Center for Organometallic Research and Education, Department of Chemistry, University of North Texas, Denton, Texas 76203
| | - Jeffery A. Martin
- Center for Organometallic Research and Education, Department of Chemistry, University of North Texas, Denton, Texas 76203
| | - Simon G. Bott
- Center for Organometallic Research and Education, Department of Chemistry, University of North Texas, Denton, Texas 76203
| | - Michael G. Richmond
- Center for Organometallic Research and Education, Department of Chemistry, University of North Texas, Denton, Texas 76203
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Song X, Brown TL. Thermal substitution reactions of the heterodinuclear complex CpFe(CO)2Co(CO)4 with phosphorus ligands. Inorganica Chim Acta 1996. [DOI: 10.1016/0020-1693(95)04877-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Gamasa MP, Gimeno J, Gonzalez-Bernardo C, Martín-Vaca BM, Monti D, Bassetti M. Phosphine Substitution in Indenyl- and Cyclopentadienylruthenium Complexes. Effect of the η5 Ligand in a Dissociative Pathway. Organometallics 1996. [DOI: 10.1021/om950428k] [Citation(s) in RCA: 88] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Oishi S. Cr(CO)5(phen) as an intermediate of photochemical CO substitution in Cr(CO)6 with 1,10-phenanthroline. Coord Chem Rev 1994. [DOI: 10.1016/0010-8545(94)80036-7] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Basato M. Kinetics and mechanism of the reaction of bis-μ-diethylphosphidobis(tetracarbonylmanganese) with tri-n-butylphosphine. J Organomet Chem 1993. [DOI: 10.1016/0022-328x(93)80470-v] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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Coville NJ, Leins AE. MnRe(CO)10: A review of the chemical and physical properties of a simple heterobimetallic non-bridged dimer. J CLUST SCI 1993. [DOI: 10.1007/bf00703739] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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Ciriano MA, Pérez-Torrente JJ, Lahoz FJ, Oro LA. Chemical evidence of polynuclear intermediates in a ligand redistribution equilibrium between dinuclear rhodium complexes. X-ray structure of [Rh2(μ-bzta)2(CO)3(PPh3)] (bzta = benzothiazole-2-thiolate). J Organomet Chem 1993. [DOI: 10.1016/0022-328x(93)80403-x] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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Fritz G, Bauer H. Komplexchemie P-reicher Phosphane und Silylphosphane. VIII. Zur unterschiedlichen Tendenz der Bildung von Chromcarbonyl-Komplexen silylierter-alkylierter Phosphane und Diphosphane. Z Anorg Allg Chem 1992. [DOI: 10.1002/zaac.19926180114] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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Schwederski B, Kaim W, Olbrich-Deussner B, Roth T. Electron transfer catalyzed substitution in carbonyl complexes. J Organomet Chem 1992. [DOI: 10.1016/0022-328x(92)83491-y] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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Fritz G, Mayer B. Komplexchemie P-reicher Phosphane und Silylphosphane. VII. Carbonylkomplexe des Heptaphosphans(3) iPr2(Me3Si)P7. Z Anorg Allg Chem 1992. [DOI: 10.1002/zaac.19926100109] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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Hanzlík J, Pospíšil L, Vlček A, Krejčík M. Electrochemical oxidation of cis-[Mo(CO)4(2,2′-bipyridine)] coupled with ligand substitution reactions in non-aqueous solvents. J Electroanal Chem (Lausanne) 1992. [DOI: 10.1016/0022-0728(92)85009-r] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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A fast atom bombardment mass spectrometry study of transition metal carbonyl cluster compounds. J Organomet Chem 1990. [DOI: 10.1016/0022-328x(90)85253-u] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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Hor T, Chan HS, Leong YP, Tan MM. X. Thermogravimetric and quantitative studies of the oxidative decarbonylation of tungsten hexacarbonyl. J Organomet Chem 1989. [DOI: 10.1016/0022-328x(89)85047-8] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Don MJ, Richmond MG, Watson WH, Nagl A. Reaction of Ph2PH with the tetracobalt cluster Co4(CO)10(μ4-PPh)2. Kinetic studies of sequential CO replacement and X-ray crystal structure of Co4(CO)8(μ4-PPh)2(Ph2PH)2. J Organomet Chem 1989. [DOI: 10.1016/0022-328x(89)87234-1] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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Hor T, Chan HS. Substituted metal carbonyls. Part 9. Solution and solid-state decompositions of diphosphine-monobridged molybdenum carbonyl dimers. Inorganica Chim Acta 1989. [DOI: 10.1016/s0020-1693(00)85398-0] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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Thermal behaviour of the materials [MCl2(PMe3)4] and [MCl2(PMe3)2(CN-t-Bu)3] (M=Mo, W; PMe3=trimethylphosphine). Inorganica Chim Acta 1989. [DOI: 10.1016/s0020-1693(00)84013-x] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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