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Hu Z, Yuan H, Men Y, Liu Q, Zhang J, Xu X. Cross-Cycloaddition of Two Different Isocyanides: Chemoselective Heterodimerization and [3+2]-Cyclization of 1,4-Diazabutatriene. Angew Chem Int Ed Engl 2016; 55:7077-80. [DOI: 10.1002/anie.201600257] [Citation(s) in RCA: 85] [Impact Index Per Article: 10.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2016] [Revised: 03/03/2016] [Indexed: 11/08/2022]
Affiliation(s)
- Zhongyan Hu
- Department of Chemistry; Northeast Normal University; Changchun 130024 China
| | - Haiyan Yuan
- Department of Chemistry; Northeast Normal University; Changchun 130024 China
| | - Yang Men
- Department of Chemistry; Northeast Normal University; Changchun 130024 China
| | - Qun Liu
- Department of Chemistry; Northeast Normal University; Changchun 130024 China
| | - Jingping Zhang
- Department of Chemistry; Northeast Normal University; Changchun 130024 China
| | - Xianxiu Xu
- Department of Chemistry; Northeast Normal University; Changchun 130024 China
- College of Chemistry and Molecular Engineering (SCME); Institute of Advanced Synthesis (IAS); Jiangsu National Synergetic Innovation Centre for Advanced Materials (SICAM); Nanjing Tech University (Nanjing Tech); Nanjing 211816 China
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2
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Hu Z, Yuan H, Men Y, Liu Q, Zhang J, Xu X. Cross-Cycloaddition of Two Different Isocyanides: Chemoselective Heterodimerization and [3+2]-Cyclization of 1,4-Diazabutatriene. Angew Chem Int Ed Engl 2016. [DOI: 10.1002/ange.201600257] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Zhongyan Hu
- Department of Chemistry; Northeast Normal University; Changchun 130024 China
| | - Haiyan Yuan
- Department of Chemistry; Northeast Normal University; Changchun 130024 China
| | - Yang Men
- Department of Chemistry; Northeast Normal University; Changchun 130024 China
| | - Qun Liu
- Department of Chemistry; Northeast Normal University; Changchun 130024 China
| | - Jingping Zhang
- Department of Chemistry; Northeast Normal University; Changchun 130024 China
| | - Xianxiu Xu
- Department of Chemistry; Northeast Normal University; Changchun 130024 China
- College of Chemistry and Molecular Engineering (SCME); Institute of Advanced Synthesis (IAS); Jiangsu National Synergetic Innovation Centre for Advanced Materials (SICAM); Nanjing Tech University (Nanjing Tech); Nanjing 211816 China
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Abstract
Transition metal hydride complexes are usually amphoteric, not only acting as hydride donors, but also as Brønsted-Lowry acids. A simple additive ligand acidity constant equation (LAC for short) allows the estimation of the acid dissociation constant Ka(LAC) of diamagnetic transition metal hydride and dihydrogen complexes. It is remarkably successful in systematizing diverse reports of over 450 reactions of acids with metal complexes and bases with metal hydrides and dihydrogen complexes, including catalytic cycles where these reactions are proposed or observed. There are links between pKa(LAC) and pKa(THF), pKa(DCM), pKa(MeCN) for neutral and cationic acids. For the groups from chromium to nickel, tables are provided that order the acidity of metal hydride and dihydrogen complexes from most acidic (pKa(LAC) -18) to least acidic (pKa(LAC) 50). Figures are constructed showing metal acids above the solvent pKa scales and organic acids below to summarize a large amount of information. Acid-base features are analyzed for catalysts from chromium to gold for ionic hydrogenations, bifunctional catalysts for hydrogen oxidation and evolution electrocatalysis, H/D exchange, olefin hydrogenation and isomerization, hydrogenation of ketones, aldehydes, imines, and carbon dioxide, hydrogenases and their model complexes, and palladium catalysts with hydride intermediates.
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Affiliation(s)
- Robert H Morris
- Department of Chemistry, University of Toronto , 80 Saint George Street, Toronto, Ontario M5S 3H6, Canada
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4
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Di Giuseppe A, Castarlenas R, Oro LA. Mechanistic considerations on catalytic H/D exchange mediated by organometallic transition metal complexes. CR CHIM 2015. [DOI: 10.1016/j.crci.2015.02.006] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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5
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Zheng Y, Xiong T, Lv Y, Zhang J, Zhang Q. Investigation on the mechanism of water-assisted palladium-catalyzed benzylic C–H amination by N-fluorobenzenesulfonimide. Org Biomol Chem 2013; 11:7923-30. [DOI: 10.1039/c3ob41299g] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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6
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Yuan H, Zheng Y, Zhang J. Mechanism study of the intramolecular anti-Michael addition of N-alkylfurylacrylacetamides. J Org Chem 2012; 77:8744-9. [PMID: 22967167 DOI: 10.1021/jo3018796] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The mechanism of the intramolecular nucleophilic addition of N-alkylfurylacrylacetamides is investigated by density functional theory calculations. Three possible reaction pathways have been considered based on possible conformations of the same reactant, which undergoes three stages, including hydrogen elimination by the base NaH, followed by the nucleophilic addition of N(-) on C(α) (C(β)) via an anti-Michael (Michael) mechanism, and then proton transfer affords the final product Pr-5 (Pr-6). The pathway corresponding to the reactant with the most stable conformation is found to be the most favorable one. The rate-determining step of the intramolecular nucleophilic addition is the nucleophilic addition of N(-) on C(α) (C(β)) featuring a cyclic ring transition state. Solvent effects are considered at the B3LYP/6-31G(d,p) level in solvent DMSO, and the results suggest that the relative reaction trends are consistent with the gas-phase reaction. Furthermore, the difference of the energy barriers explains the origin of the regioselectivity of the experiment. Finally, the effects of the substituent on N1 and C(β) to the regioselectivity have been discussed.
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Affiliation(s)
- Haiyan Yuan
- Faculty of Chemistry, Northeast Normal University, Changchun 130024, China
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Cheung HW, So CM, Pun KH, Zhou Z, Lau CP. Hydro(trispyrazolyl)borato-Ruthenium(II) Diphosphinoamino Complex-Catalyzed Addition of β-Diketones to 1-Alkynes and Anti-Markovnikov Addition of Secondary Amines to Aromatic 1-Alkynes. Adv Synth Catal 2011. [DOI: 10.1002/adsc.201000567] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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9
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Tse SKS, Xue P, Lin Z, Jia G. Hydrogen/Deuterium Exchange Reactions of Olefins with Deuterium Oxide Mediated by the Carbonylchlorohydrido- tris(triphenylphosphine)ruthenium(II) Complex. Adv Synth Catal 2010. [DOI: 10.1002/adsc.201000037] [Citation(s) in RCA: 56] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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10
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Besora M, Lledós A, Maseras F. Protonation of transition-metal hydrides: a not so simple process. Chem Soc Rev 2009; 38:957-66. [DOI: 10.1039/b608404b] [Citation(s) in RCA: 94] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
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11
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Xu HJ, Cheng Y, Sun JF, Dougan BA, Li YZ, Chen XT, Xue ZL. Preparation, characterization, and catalytic properties of ruthenium nitrosyl complexes with polypyrazolylmethane ligands. J Organomet Chem 2008. [DOI: 10.1016/j.jorganchem.2008.09.045] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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12
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Morris RH. Dihydrogen, dihydride and in between: NMR and structural properties of iron group complexes. Coord Chem Rev 2008. [DOI: 10.1016/j.ccr.2008.01.010] [Citation(s) in RCA: 108] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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13
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Casarin M, Forrer D, Garau F, Pandolfo L, Pettinari C, Vittadini A. Density Functional Theory Study of the Binding Capability of Tris(pyrazol-1-yl)methane toward Cu(I) and Ag(I) Cations. J Phys Chem A 2008; 112:6723-31. [DOI: 10.1021/jp801902c] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Maurizio Casarin
- Dipartimento di Scienze Chimiche, Università degli Studi di Padova, Padova 35131, Italy, Dipartimento di Scienze Chimiche, Università degli Studi di Camerino, Camerino (MC) 62032, Italy, Istituto di Scienze Molecolari del CNR, Padova 35131, Italy, and Consorzio Interuniversitario di Scienza e Tecnologia dei Materiali, Firenze 50121, Italy
| | - Daniel Forrer
- Dipartimento di Scienze Chimiche, Università degli Studi di Padova, Padova 35131, Italy, Dipartimento di Scienze Chimiche, Università degli Studi di Camerino, Camerino (MC) 62032, Italy, Istituto di Scienze Molecolari del CNR, Padova 35131, Italy, and Consorzio Interuniversitario di Scienza e Tecnologia dei Materiali, Firenze 50121, Italy
| | - Federica Garau
- Dipartimento di Scienze Chimiche, Università degli Studi di Padova, Padova 35131, Italy, Dipartimento di Scienze Chimiche, Università degli Studi di Camerino, Camerino (MC) 62032, Italy, Istituto di Scienze Molecolari del CNR, Padova 35131, Italy, and Consorzio Interuniversitario di Scienza e Tecnologia dei Materiali, Firenze 50121, Italy
| | - Luciano Pandolfo
- Dipartimento di Scienze Chimiche, Università degli Studi di Padova, Padova 35131, Italy, Dipartimento di Scienze Chimiche, Università degli Studi di Camerino, Camerino (MC) 62032, Italy, Istituto di Scienze Molecolari del CNR, Padova 35131, Italy, and Consorzio Interuniversitario di Scienza e Tecnologia dei Materiali, Firenze 50121, Italy
| | - Claudio Pettinari
- Dipartimento di Scienze Chimiche, Università degli Studi di Padova, Padova 35131, Italy, Dipartimento di Scienze Chimiche, Università degli Studi di Camerino, Camerino (MC) 62032, Italy, Istituto di Scienze Molecolari del CNR, Padova 35131, Italy, and Consorzio Interuniversitario di Scienza e Tecnologia dei Materiali, Firenze 50121, Italy
| | - Andrea Vittadini
- Dipartimento di Scienze Chimiche, Università degli Studi di Padova, Padova 35131, Italy, Dipartimento di Scienze Chimiche, Università degli Studi di Camerino, Camerino (MC) 62032, Italy, Istituto di Scienze Molecolari del CNR, Padova 35131, Italy, and Consorzio Interuniversitario di Scienza e Tecnologia dei Materiali, Firenze 50121, Italy
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14
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Szymczak NK, Tyler DR. Aspects of dihydrogen coordination chemistry relevant to reactivity in aqueous solution. Coord Chem Rev 2008. [DOI: 10.1016/j.ccr.2007.06.007] [Citation(s) in RCA: 42] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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15
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Shi FQ, Li X, Xia Y, Zhang L, Yu ZX. DFT Study of the Mechanisms of In Water Au(I)-Catalyzed Tandem [3,3]-Rearrangement/Nazarov Reaction/[1,2]-Hydrogen Shift of Enynyl Acetates: A Proton-Transport Catalysis Strategy in the Water-Catalyzed [1,2]-Hydrogen Shift. J Am Chem Soc 2007; 129:15503-12. [DOI: 10.1021/ja071070+] [Citation(s) in RCA: 266] [Impact Index Per Article: 15.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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16
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Kovács G, Ujaque G, Lledós A, Joó F. The Role of Water in the Stereoselective Hydrogenation of 1,2-Diphenylacetylene Catalyzed by the Water-Soluble [{RuCl2(mtppms)2}2]. Eur J Inorg Chem 2007. [DOI: 10.1002/ejic.200601200] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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17
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Shi F. Theoretical Investigation on the Nature of Intramolecular Interactions in Aminocyclopentadienyl Ruthenium Hydride Complexes. Organometallics 2006. [DOI: 10.1021/om060330d] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Fuqiang Shi
- College of Chemistry, Peking University, Beijing, 100871, People's Republic of China
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18
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Liao HY. Computational study on the microsolvation effect of dihydrogen-bonded LiH…HF system. Chem Phys Lett 2006. [DOI: 10.1016/j.cplett.2006.04.064] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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19
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Algarra AG, Basallote MG, Feliz M, Fernández-Trujillo MJ, Llusar R, Safont VS. New Insights into the Mechanism of Proton Transfer to Hydride Complexes: Kinetic and Theoretical Evidence Showing the Existence of Competitive Pathways for Protonation of the Cluster [W3S4H3(dmpe)3]+ with Acids. Chemistry 2006; 12:1413-26. [PMID: 16294357 DOI: 10.1002/chem.200500695] [Citation(s) in RCA: 42] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
The reaction of the hydride cluster [W3S4H3(dmpe)3]+ (1, dmpe = 1,2-bis(dimethylphosphanyl)ethane) with acids (HCl, CF3COOH, HBF4) in CH2Cl2 solution under pseudo-first-order conditions of excess acid occurs with three kinetically distinguishable steps that can be interpreted as corresponding to successive formal substitution processes of the coordinated hydrides by the anion of the acid (HCl, CF3COOH) or the solvent (HBF4). Whereas the rate law for the third step changes with the nature of the acid, the first two kinetic steps always show a second-order dependence on acid concentration. In contrast, a single kinetic step with a first-order dependence with respect to the acid is observed when the experiments are carried out with a deficit of acid. The decrease in the T1 values for the hydride NMR signal of 1 in the presence of added HCl suggests the formation of an adduct with a W-H...H-Cl dihydrogen bond. Theoretical calculations for the reaction with HCl indicate that the kinetic results in CH2Cl2 solution can be interpreted on the basis of a mechanism with two competitive pathways. One of the pathways consists of direct proton transfer within the W-H...H-Cl adduct to form W-Cl and H2, whereas the other requires the presence of a second HCl molecule to form a W-H...H-Cl...H-Cl adduct that transforms into W-Cl, H2 and HCl in the rate-determining step. The activation barriers and the structures of the transition states for both pathways were also calculated, and the results indicate that both pathways can be competitive and that the transition states can be described in both cases as a dihydrogen complex hydrogen-bonded to Cl- or HCl2(-).
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Affiliation(s)
- Andrés G Algarra
- Departamento de Ciencia de los Materiales e Ingeniería Metalúrgica y Química Inorgánica, Facultad de Ciencias, Universidad de Cádiz, Apartado 40, Puerto Real, 11510 Cádiz, Spain
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20
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Donghi D, Beringhelli T, D'Alfonso G, Mondini M. NMR Investigation of the Dihydrogen-Bonding and Proton-Transfer Equilibria between the Hydrido Carbonyl Anion [HRe2(CO)9]− and Fluorinated Alcohols. Chemistry 2006; 12:1016-25. [PMID: 16267862 DOI: 10.1002/chem.200500920] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
The interaction of fluorinated alcohols with the anionic hydrido complex [HRe2(CO)9]- (1) has been investigated by NMR spectroscopy. According to the acidic strength of the alcohols, the interaction may result not only in the formation of dihydrogen-bonded ROH...[HRe2(CO)9]- adducts 2, but also in proton transfer to give the neutral species [H2Re2(CO)9] (3). With the weaker acid trifluoroethanol (TFE) evidence for the occurrence of the dihydrogen-bonding equilibrium was obtained by 2D 1H NOESY. The dependence of the hydride chemical shift on TFE concentration at different temperatures provided values for the constants of this equilibrium, from which the thermodynamic parameters were evaluated as deltaH(degrees) = -2.6(2) kcal mol(-1), deltaS(degrees) = -9.3(2) cal mol(-1) K(-1). This corresponds to a rather low basicity factor (E(j) = 0.64). Variable-temperature T1 measurements allowed the proton-hydride distance in adduct 2 a to be estimated (1.80 angstroms). In the presence of hexafluoroisopropyl alcohol (HFIP) simultaneous occurrence of both dihydrogen-bonding and proton-transfer equilibria was observed, and the equilibria shifted versus the protonated product 3 with increasing HFIP concentration and decreasing temperature. Reversible proton transfer between the alcohol and the hydrido complex occurs on the NMR timescale, as revealed by a 2D 1H EXSY experiment at 240 K. For the more acidic perfluoro-tert-butyl alcohol (PFTB) the protonation equilibrium was further shifted to the right. Thermal instability of 3 prevented the acquisition of accurate thermodynamic data for these equilibria. The occurrence of the proton-transfer processes (in spite of the unfavorable pK(a) values) can be explained by the formation of homoconjugated RO...HOR- pairs which stabilize the alcoholate anions.
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Affiliation(s)
- Daniela Donghi
- Università degli Studi di Milano, Facoltà di Farmacia, Dipartimento di Chimica Inorganica, Metallorganica e Analitica, Via Venezian 21, 20133 Milano, Italy
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21
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Kovács G, Ujaque G, Lledós A, Joó F. Theoretical Investigation of the Selective CC Hydrogenation of Unsaturated Aldehydes Catalyzed by [{RuCl2(mtppms)2}2] in Acidic Media. Organometallics 2006. [DOI: 10.1021/om050929y] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Gábor Kovács
- Institute of Physical Chemistry, University of Debrecen, Debrecen 10, H-4010 Hungary, Research Group of Homogeneous Catalysis, Hungarian Academy of Sciences, Debrecen 10, P.O. Box 7, H-4010 Hungary, and Departament de Química, Universitat Autònoma de Barcelona, 08193 Bellaterra (Barcelona), Spain
| | - Gregori Ujaque
- Institute of Physical Chemistry, University of Debrecen, Debrecen 10, H-4010 Hungary, Research Group of Homogeneous Catalysis, Hungarian Academy of Sciences, Debrecen 10, P.O. Box 7, H-4010 Hungary, and Departament de Química, Universitat Autònoma de Barcelona, 08193 Bellaterra (Barcelona), Spain
| | - Agustí Lledós
- Institute of Physical Chemistry, University of Debrecen, Debrecen 10, H-4010 Hungary, Research Group of Homogeneous Catalysis, Hungarian Academy of Sciences, Debrecen 10, P.O. Box 7, H-4010 Hungary, and Departament de Química, Universitat Autònoma de Barcelona, 08193 Bellaterra (Barcelona), Spain
| | - Ferenc Joó
- Institute of Physical Chemistry, University of Debrecen, Debrecen 10, H-4010 Hungary, Research Group of Homogeneous Catalysis, Hungarian Academy of Sciences, Debrecen 10, P.O. Box 7, H-4010 Hungary, and Departament de Química, Universitat Autònoma de Barcelona, 08193 Bellaterra (Barcelona), Spain
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22
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Alegria ECB, Martins LMDRS, Haukka M, Pombeiro AJL. Rhenium complexes of tris(pyrazolyl)methanes and sulfonate derivative. Dalton Trans 2006:4954-61. [PMID: 17047745 DOI: 10.1039/b611209a] [Citation(s) in RCA: 45] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The trioxo [ReO(3){SO(3)C(pz)(3)}] (1) (pz = pyrazolyl) and oxo [ReOCl{SO(3)C(pz)(3)}(PPh(3))]Cl (2) compounds with tris(pyrazolyl)methanesulfonate were obtained by treatment of Re(2)O(7) or [ReOCl(3)(PPh(3))(2)], respectively, with Li[SO(3)C(pz)(3)], whereas [ReCl(3){HC(pz)(3)}] (3), [ReCl(3){HC(3,5-Me(2)pz)(3)}] (4) and [ReCl(4){eta(2)-HC(pz)(3)}] (5) were prepared by reaction of [ReOCl(3)(PPh(3))(2)] (3,4) or [ReCl(4)(NCMe)(2)] (5) with hydrotris(pyrazolyl)methane HC(pz)(3) (3,5) or hydrotris(3,5-dimethyl-1-pyrazolyl)methane HC(3,5-Me(2)pz)(3) (4). [ReO{SO(3)C(pz)(3)}{OC(CH(3))(2)pz}][ReO(4)] 6, with a chelated pyrazolyl-alkoxide, was derived from an unprecedented ketone-pyrazolyl coupling on reaction of crude 1 with acetone. The compounds have been characterized by elemental analyses, IR and NMR spectroscopies, FAB-MS spectrometry and cyclic voltammetry and, in the case of 5 and 6, also by single-crystal X-ray diffraction. The electrochemical E(L) Lever parameter has been estimated, for the first time, for the SO(3)C(pz)(3)(-) and oxo ligands allowing the measurement of their electron-donor character and comparison with other ligands. Compounds 1, 2 and 6 appear to be the first tris(pyrazolyl)methanesulfonate complexes of rhenium to be reported.
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Affiliation(s)
- Elisabete C B Alegria
- Centro de Química Estrutural, Complexo I, Instituto Superior Técnico, Av. Rovisco Pais, 1049-001, Lisboa, Portugal
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23
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Kovács G, Schubert G, Joó F, Pápai I. Theoretical Mechanistic Study of Rhodium(I) Phosphine-Catalyzed H/D Exchange Processes in Aqueous Solutions. Organometallics 2005. [DOI: 10.1021/om0501529] [Citation(s) in RCA: 46] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Gábor Kovács
- Institute of Physical Chemistry, University of Debrecen, 4010 Debrecen, P.O.Box 7, Hungary, Chemical Research Centre of the Hungarian Academy of Sciences, Pusztaszeri út 59-67, H-1025 Budapest, Hungary, and Research Group of Homogeneous Catalysis, Hungarian Academy of Sciences−University of Debrecen, 4010 Debrecen, P.O. Box 7, Hungary
| | - Gábor Schubert
- Institute of Physical Chemistry, University of Debrecen, 4010 Debrecen, P.O.Box 7, Hungary, Chemical Research Centre of the Hungarian Academy of Sciences, Pusztaszeri út 59-67, H-1025 Budapest, Hungary, and Research Group of Homogeneous Catalysis, Hungarian Academy of Sciences−University of Debrecen, 4010 Debrecen, P.O. Box 7, Hungary
| | - Ferenc Joó
- Institute of Physical Chemistry, University of Debrecen, 4010 Debrecen, P.O.Box 7, Hungary, Chemical Research Centre of the Hungarian Academy of Sciences, Pusztaszeri út 59-67, H-1025 Budapest, Hungary, and Research Group of Homogeneous Catalysis, Hungarian Academy of Sciences−University of Debrecen, 4010 Debrecen, P.O. Box 7, Hungary
| | - Imre Pápai
- Institute of Physical Chemistry, University of Debrecen, 4010 Debrecen, P.O.Box 7, Hungary, Chemical Research Centre of the Hungarian Academy of Sciences, Pusztaszeri út 59-67, H-1025 Budapest, Hungary, and Research Group of Homogeneous Catalysis, Hungarian Academy of Sciences−University of Debrecen, 4010 Debrecen, P.O. Box 7, Hungary
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Cayuela E, Jalón FA, Manzano BR, Espino G, Weissensteiner W, Mereiter K. Monocyclopentadienylhydride Derivatives of Ruthenium: Stereoselective Proton Transfer and Proton-Hydride Exchange in an Extremely Short Dihydrogen Bond. J Am Chem Soc 2004; 126:7049-62. [PMID: 15174876 DOI: 10.1021/ja031926k] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Diastereomerically pure complexes of formula CpRuCl(PP) and CpRuH(PP) with chiral ferrocenyl diphosphines were prepared and the selectivity of proton-transfer processes over the monohydride compounds with different acids was studied. With 1 equiv of HBF(4) the cis-dihydrogen and trans-dihydride complexes were formed while with 3 equiv of CF(3)CO(2)H the trans-dihydride derivative was the only product. However, the use of 1 equiv of CF(3)CO(2)H led to a dihydrogen bonded complex with an extremely short RuH...HO(2)CF(3) interaction that exhibits proton-hydride exchange. Using the labeled acid CF(3)CO(2)D, a stereoselective transference of the deuteron was demonstrated that implies the previous epimerization of the monohydride and the subsequent attack of the acid in the position previously occupied by the hydride.
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Affiliation(s)
- Ester Cayuela
- Departamento de Química Inorgánica, Orgánica y Bioquímica, Facultad de Químicas, Universidad de Castilla-La Mancha, Avda. Camilo J. Cela 10, 13071 Ciudad Real, Spain
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25
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Wilson DC, Nelson JH. Reactions of ruthenium(II) tris(pyrazolyl)borate and tris(pyrazolyl)methane complexes with diphenylvinylphosphine and 3,4-dimethyl-1-phenylphosphole. J Organomet Chem 2003. [DOI: 10.1016/j.jorganchem.2003.07.010] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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Belkova NV, Besora M, Epstein LM, Lledós A, Maseras F, Shubina ES. Influence of media and homoconjugate pairing on transition metal hydride protonation. An IR and DFT study on proton transfer to CpRuH(CO)(PCy3). J Am Chem Soc 2003; 125:7715-25. [PMID: 12812513 DOI: 10.1021/ja029712a] [Citation(s) in RCA: 66] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The interaction of the ruthenium hydride complex CpRuH(CO)(PCy(3)) (1) with proton donors HOR of different strength was studied in hexane and compared with data in dichloromethane. The formation of dihydrogen-bonded complexes (2) and ion pairs stabilized by hydrogen bonds between the dihydrogen ligand and the anion (3) was observed. Kinetics of the interconversion from 2 to 3 was followed at different (CF(3))(3)COH concentrations between 200 and 240 K. The activation enthalpy and entropy values for proton transfer from the dihydrogen-bonded complex 2 to the (eta(2)-H(2))-complex 3 (DeltaH() = 11.0 +/- 0.5 kcal/mol and DeltaS() = -19 +/- 3 eu) were obtained for the first time. The results of the DFT study of the proton transfer process, taking CF(3)COOH and (CF(3))(3)COH as a proton donors and introducing solvent effects in the calculation with the PCM method, are presented. The role of homoconjugate pairs [ROHOR](-) in the protonation is analyzed by means of the inclusion of an additional ROH molecule in the calculations. The formation of the free cationic complex [CpRu(CO)(PCy(3))(eta(2)-H(2))](+) is driven by the formation of the homoconjugated anionic complex [ROHOR](-). Solvent polarity plays a significant role stabilizing the charged species formed in the process. The theoretical study also accounts for the dihydrogen release and production of CpRu(OR)(CO)(PCy(3)), observed at temperatures above 250 K.
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Affiliation(s)
- Natalia V Belkova
- A. N. Nesmeyanov Institute of Organoelement Compounds, 28 Vavilov Street, 119991 Moscow, Russia
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Alkorta I, Elguero J, Mó O, Yáñez M, Del Bene JE. Ab Initio Study of the Structural, Energetic, Bonding, and IR Spectroscopic Properties of Complexes with Dihydrogen Bonds. J Phys Chem A 2002. [DOI: 10.1021/jp021159w] [Citation(s) in RCA: 80] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
| | | | | | | | - Janet E. Del Bene
- Quantum Theory Project, University of Florida, Gainesville, Florida 32611, and Department of Chemistry, Youngstown State University, Youngstown, Ohio 44555
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Lam YF, Yin C, Yeung CH, Ng SM, Jia G, Lau CP. Attenuation of Intramolecular Ru−H···H−N Dihydrogen Bonding in Aminocyclopentadienyl Ruthenium Hydride Complexes Containing Phosphite Ligands. Organometallics 2002. [DOI: 10.1021/om010966z] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Yat Fai Lam
- Department of Applied Biology & Chemical Technology, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong, China, Department of Chemistry, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong, China, and Department of Pharmacology, Wuhan Institute of Chemical Technology, Wuhan, Hubei 430074, China
| | - Chuanqi Yin
- Department of Applied Biology & Chemical Technology, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong, China, Department of Chemistry, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong, China, and Department of Pharmacology, Wuhan Institute of Chemical Technology, Wuhan, Hubei 430074, China
| | - Chi Hung Yeung
- Department of Applied Biology & Chemical Technology, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong, China, Department of Chemistry, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong, China, and Department of Pharmacology, Wuhan Institute of Chemical Technology, Wuhan, Hubei 430074, China
| | - Siu Man Ng
- Department of Applied Biology & Chemical Technology, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong, China, Department of Chemistry, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong, China, and Department of Pharmacology, Wuhan Institute of Chemical Technology, Wuhan, Hubei 430074, China
| | - Guochen Jia
- Department of Applied Biology & Chemical Technology, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong, China, Department of Chemistry, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong, China, and Department of Pharmacology, Wuhan Institute of Chemical Technology, Wuhan, Hubei 430074, China
| | - Chak Po Lau
- Department of Applied Biology & Chemical Technology, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong, China, Department of Chemistry, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong, China, and Department of Pharmacology, Wuhan Institute of Chemical Technology, Wuhan, Hubei 430074, China
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Affiliation(s)
- R Custelcean
- Department of Chemistry, Michigan State University, East Lansing, Michigan 48824, USA
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