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Dantignana V, Pérez‐Segura MC, Besalú‐Sala P, Delgado‐Pinar E, Martínez‐Camarena Á, Serrano‐Plana J, Álvarez‐Núñez A, Castillo CE, García‐España E, Luis JM, Basallote MG, Costas M, Company A. Characterization of a Ferryl Flip in Electronically Tuned Nonheme Complexes. Consequences in Hydrogen Atom Transfer Reactivity. Angew Chem Int Ed Engl 2023; 62:e202211361. [PMID: 36305539 PMCID: PMC10107328 DOI: 10.1002/anie.202211361] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2022] [Indexed: 12/04/2022]
Abstract
Two oxoiron(IV) isomers (R 2a and R 2b) of general formula [FeIV (O)(R PyNMe3 )(CH3 CN)]2+ are obtained by reaction of their iron(II) precursor with NBu4 IO4 . The two isomers differ in the position of the oxo ligand, cis and trans to the pyridine donor. The mechanism of isomerization between R 2a and R 2b has been determined by kinetic and computational analyses uncovering an unprecedented path for interconversion of geometrical oxoiron(IV) isomers. The activity of the two oxoiron(IV) isomers in hydrogen atom transfer (HAT) reactions shows that R 2a reacts one order of magnitude faster than R 2b, which is explained by a repulsive noncovalent interaction between the ligand and the substrate in R 2b. Interestingly, the electronic properties of the R substituent in the ligand pyridine ring do not have a significant effect on reaction rates. Overall, the intrinsic structural aspects of each isomer define their relative HAT reactivity, overcoming changes in electronic properties of the ligand.
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Affiliation(s)
- Valeria Dantignana
- Institut de Química Computacional i Catàlisi (IQCC)Departament de Química, Universitat de GironaC/Mª Aurèlia Capmany 6917003GironaCataloniaSpain
| | - M. Carmen Pérez‐Segura
- Departamento de Ciencia de los Materiales e Ingeniería Metalúrgica y Química InorgánicaFacultad de Ciencias, Instituto de Biomoléculas (INBIO)Universidad de CádizPuerto Real11510CádizSpain
| | - Pau Besalú‐Sala
- Institut de Química Computacional i Catàlisi (IQCC)Departament de Química, Universitat de GironaC/Mª Aurèlia Capmany 6917003GironaCataloniaSpain
| | - Estefanía Delgado‐Pinar
- Departamento de Química InorgánicaInstituto de Ciencia Molecular (ICMol)Universidad de ValenciaC/Catedrático José Beltrán, Paterna46980Valencia 2Spain
| | - Álvaro Martínez‐Camarena
- Departamento de Química InorgánicaInstituto de Ciencia Molecular (ICMol)Universidad de ValenciaC/Catedrático José Beltrán, Paterna46980Valencia 2Spain
| | - Joan Serrano‐Plana
- Institut de Química Computacional i Catàlisi (IQCC)Departament de Química, Universitat de GironaC/Mª Aurèlia Capmany 6917003GironaCataloniaSpain
| | - Andrea Álvarez‐Núñez
- Institut de Química Computacional i Catàlisi (IQCC)Departament de Química, Universitat de GironaC/Mª Aurèlia Capmany 6917003GironaCataloniaSpain
| | - Carmen E. Castillo
- Departamento de Ciencia de los Materiales e Ingeniería Metalúrgica y Química InorgánicaFacultad de Ciencias, Instituto de Biomoléculas (INBIO)Universidad de CádizPuerto Real11510CádizSpain
| | - Enrique García‐España
- Departamento de Química InorgánicaInstituto de Ciencia Molecular (ICMol)Universidad de ValenciaC/Catedrático José Beltrán, Paterna46980Valencia 2Spain
| | - Josep M. Luis
- Institut de Química Computacional i Catàlisi (IQCC)Departament de Química, Universitat de GironaC/Mª Aurèlia Capmany 6917003GironaCataloniaSpain
| | - Manuel G. Basallote
- Departamento de Ciencia de los Materiales e Ingeniería Metalúrgica y Química InorgánicaFacultad de Ciencias, Instituto de Biomoléculas (INBIO)Universidad de CádizPuerto Real11510CádizSpain
| | - Miquel Costas
- Institut de Química Computacional i Catàlisi (IQCC)Departament de Química, Universitat de GironaC/Mª Aurèlia Capmany 6917003GironaCataloniaSpain
| | - Anna Company
- Institut de Química Computacional i Catàlisi (IQCC)Departament de Química, Universitat de GironaC/Mª Aurèlia Capmany 6917003GironaCataloniaSpain
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Sarkar O, Roy M, Biswal D, Ranjan Pramanik N, Paul S, Drew MGB, Chakrabarti S. Structural Exploration and Protein Binding Efficiencies of Binuclear Dioxidomolybdenum(VI) Complexes Constructed from ONO Chelator and Linear N−N Ditopic Spacer. ChemistrySelect 2022. [DOI: 10.1002/slct.202201412] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Oiendrilla Sarkar
- Department of Chemistry University College of Science 92, Acharya Prafulla Chandra Road Kolkata 700009, West Bengal India
| | - Malini Roy
- Department of Chemistry University College of Science 92, Acharya Prafulla Chandra Road Kolkata 700009, West Bengal India
| | - Debanjana Biswal
- Department of Chemistry University College of Science 92, Acharya Prafulla Chandra Road Kolkata 700009, West Bengal India
| | - Nikhil Ranjan Pramanik
- Department of Chemistry Bidhannagar College EB-2 Sector-1, Salt Lake, Kolkata 700064 India
| | - Suvendu Paul
- Department of Chemistry BITS-Pilani Hyderabad Campus Shameerpet Hyderabad 500078, Telangana India
| | - Michael G. B. Drew
- Department of Chemistry The University of Reading Whiteknights Reading RG66AD UK
| | - Syamal Chakrabarti
- Department of Chemistry University College of Science 92, Acharya Prafulla Chandra Road Kolkata 700009, West Bengal India
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Synthesis, structural insights and catalytic activity of a dioxidomolybdenum(VI) complex chelated with N4-(3-methoxyphenyl) thiosemicarbazone. TRANSIT METAL CHEM 2020. [DOI: 10.1007/s11243-020-00398-5] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
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4
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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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5
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Böhme U, Schwarzer A, Günther B. The heteroscorpionate ligand 2,2-bis(3,5-dimethylpyrazol-1-yl)-1,1-diphenylethanol and an easy preparation of its tungsten complex. Acta Crystallogr C 2019; 75:996-1001. [DOI: 10.1107/s2053229619008362] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2019] [Accepted: 06/12/2019] [Indexed: 11/10/2022] Open
Abstract
The heteroscorpionate ligand 2,2-bis(3,5-dimethylpyrazol-1-yl)-1,1-diphenylethanol, C24H26N4O, features in the solid state an intramolecular O—H...N hydrogen bond. A heteroscorpionate tungsten complex, cis-[2,2-bis(3,5-dimethylpyrazolyl)-1,1-diphenylethanolato]chloridodioxidotungsten(VI) tetrahydrofuran monosolvate, [W(C24H25N4O)ClO2]·C4H8O, was prepared by the simple mixing of solutions of the ligand and WOCl4 in tetrahydrofuran. The tungsten complex was isolated after standing for several weeks. The complex exhibits a κ3
N,N′,O-coordination of the ligand. This simple synthetic procedure allows access to the cis isomer in high yield without additional purification steps. The Hirshfeld surface analysis shows a change of the intermolecular contacts due to the coordination of the WO2Cl unit with the ligand molecule.
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6
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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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7
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Maurya MR, Mengesha B, Uprety B, Jangra N, Tomar R, Avecilla F. Oxygen atom transfer between DMSO and benzoin catalyzed by cis-dioxidomolybdenum(vi) complexes of tetradentate Mannich bases. NEW J CHEM 2018. [DOI: 10.1039/c7nj03551a] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Dioxidomolybdenum(vi) complexes of tetradentate ONNO donor Mannich base ligands for the catalytic oxygen atom transfer between benzoin and DMSO are reported.
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Affiliation(s)
- Mannar R. Maurya
- Department of Chemistry, Indian Institute of Technology Roorkee
- Roorkee-247667
- India
| | - Bekele Mengesha
- Department of Chemistry, Indian Institute of Technology Roorkee
- Roorkee-247667
- India
| | - Bhawna Uprety
- Department of Chemistry, Indian Institute of Technology Roorkee
- Roorkee-247667
- India
| | - Nancy Jangra
- Department of Chemistry, Indian Institute of Technology Roorkee
- Roorkee-247667
- India
| | - Reshu Tomar
- Department of Chemistry, Indian Institute of Technology Roorkee
- Roorkee-247667
- India
| | - Fernando Avecilla
- Grupo Xenomar
- Centro de Investigacións Científicas Avanzadas (CICA)
- Departamento de Química
- Facultade de Ciencias
- Universidade da Coruña
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8
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Schachner JA, Mösch-Zanetti NC, Peuronen A, Lehtonen A. Dioxidomolybdenum(VI) and –tungsten(VI) complexes with tetradentate amino bisphenolates as catalysts for epoxidation. Polyhedron 2017. [DOI: 10.1016/j.poly.2017.06.011] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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9
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Biswal D, Pramanik NR, Chakrabarti S, Drew MGB, Sarkar B, Maurya MR, Mukherjee SK, Chowdhury P. New polymeric, dimeric and mononuclear dioxidomolybdenum(vi) complexes with an ONO donor ligand: crystal structures, DFT calculations, catalytic performance and protein binding study of the ligand. NEW J CHEM 2017. [DOI: 10.1039/c7nj00136c] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Catalytic activity and BSA binding is reported.
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Affiliation(s)
- Debanjana Biswal
- Department of Chemistry
- University College of Science
- Kolkata
- India
| | | | | | | | - Bithika Sarkar
- Department of Chemistry
- Indian Institute of Technology Roorkee
- Roorkee-247667
- India
| | - Mannar R. Maurya
- Department of Chemistry
- Indian Institute of Technology Roorkee
- Roorkee-247667
- India
| | - Sanjib K. Mukherjee
- Department of Chemistry
- Indian Institute of Technology Delhi (IITD)
- Hauz Khas
- India
| | - Pramit Chowdhury
- Department of Chemistry
- Indian Institute of Technology Delhi (IITD)
- Hauz Khas
- India
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10
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Villanueva-Sánchez LF, García-Álvarez AC, Campirán-Martínez A, Jancik V, Martínez-Otero D, Alvarado-Rodríguez JG, Moya-Cabrera M. Molybdenum(VI) complexes supported by chalcogen-based 1,2,3-triazoles. Polyhedron 2016. [DOI: 10.1016/j.poly.2016.08.019] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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11
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12
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Tran BL, Arita A, Cooksy AL, Carrano CJ. Examination of oxygen atom transfer reactivity of heteroscorpionate dioxo-Mo(VI) complexes: Geometric isomers, solvent effect, intermediates, and catalytic oxidation. Inorganica Chim Acta 2016. [DOI: 10.1016/j.ica.2016.03.035] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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13
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Affiliation(s)
- Charles G. Young
- Department of Chemistry and PhysicsLa Trobe Institute for Molecular ScienceLa Trobe University3086MelbourneVictoriaAustralia
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14
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Carrano CJ. A Family of Homo- and Heteroscorpionate Ligands: Applications to Bioinorganic Chemistry. Eur J Inorg Chem 2016. [DOI: 10.1002/ejic.201501476] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Affiliation(s)
- Carl J. Carrano
- Department of Chemistry and Biochemistry; San Diego State University; 92182-1030 San Diego CA USA
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15
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Duman S, Kizilcikli İ, Ülküseven B. Dioxomolybdenum(VI) Complexes of 5-Bromo/3,5-Dibromo-Salicylaldehyde 4-(H/C6H5)-S-Propyl-Thiosemicarbazones. PHOSPHORUS SULFUR 2015. [DOI: 10.1080/10426507.2014.947406] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
Affiliation(s)
- Songül Duman
- Department of Chemistry, Istanbul University, 34320 Avcılar, Istanbul, Turkey
| | - İrfan Kizilcikli
- Department of Chemistry, Istanbul University, 34320 Avcılar, Istanbul, Turkey
| | - Bahri Ülküseven
- Department of Chemistry, Istanbul University, 34320 Avcılar, Istanbul, Turkey
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16
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Gouré E, Carboni M, Dubourdeaux P, Clémancey M, Balasubramanian R, Lebrun C, Bayle PA, Maldivi P, Blondin G, Latour JM. Cis/trans isomerizations in diiron complexes involving aniline or anilide ligands. Inorg Chem 2014; 53:10060-9. [PMID: 25254906 DOI: 10.1021/ic501793v] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
We have recently reported a deprotonation-induced valence inversion within a phenoxido-bridged mixed-valent diiron(II,III) complex. The initial aniline coordinated to the Fe(II) site reacts with triethylamine, and the resulting complex contains an anilide ligand coordinated to the Fe(III) ion. The behavior of these complexes in acetonitrile is indeed more intricate. Owing to the very distinctive spectroscopic signatures of the complexes, the conjunction of NMR, Mössbauer, and UV-visible absorption spectroscopies allows one to evidence two isomerization reactions, one involving the aniline linked to Fe(II) and the other the anilide on Fe(III). Theoretical calculations sustain this conclusion. Aniline in the cis position versus the bridging phenoxide is shown to be the most stable isomer while the anilide trans to the phenoxido bridge is favored. The trans isomer of the aniline complex is more acidic than the cis one by 1 pKa unit. Isomerization of the anilide complex is 10 times faster than the analogous isomerization of the aniline complex. Both reactions are proposed to proceed through a unique mechanism. This is the first time that such isomerization reactions are evidenced in dinuclear complexes.
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Affiliation(s)
- Eric Gouré
- CEA, iRTSV/LCBM, pmb , F-38000 Grenoble, France
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17
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Traar P, Schachner JA, Stanje B, Belaj F, Mösch-Zanetti NC. Dioxomolybdenum(VI) complexes with naphtholate-oxazoline ligands in catalytic epoxidation of olefins. ACTA ACUST UNITED AC 2014. [DOI: 10.1016/j.molcata.2014.01.009] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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18
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Leppin J, Förster C, Heinze K. Ligand Dynamics of tert-Butyl Isocyanide Oxido Complexes of Molybdenum(IV). Inorg Chem 2014; 53:1039-47. [DOI: 10.1021/ic4025102] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Affiliation(s)
- Jana Leppin
- Institute
of Inorganic Chemistry and Analytical Chemistry, Johannes Gutenberg-University of Mainz, Duesbergweg 10−14, 55128 Mainz, Germany
| | - Christoph Förster
- Institute
of Inorganic Chemistry and Analytical Chemistry, Johannes Gutenberg-University of Mainz, Duesbergweg 10−14, 55128 Mainz, Germany
| | - Katja Heinze
- Institute
of Inorganic Chemistry and Analytical Chemistry, Johannes Gutenberg-University of Mainz, Duesbergweg 10−14, 55128 Mainz, Germany
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Pasayat S, Dash SP, Roy S, Dinda R, Dhaka S, Maurya MR, Kaminsky W, Patil YP, Nethaji M. Synthesis, structural studies and catalytic activity of dioxidomolybdenum(VI) complexes with aroylhydrazones of naphthol-derivative. Polyhedron 2014. [DOI: 10.1016/j.poly.2013.08.055] [Citation(s) in RCA: 45] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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20
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Smeltz JL, Lilly CP, Boyle PD, Ison EA. The electronic nature of terminal oxo ligands in transition-metal complexes: ambiphilic reactivity of oxorhenium species. J Am Chem Soc 2013; 135:9433-41. [PMID: 23725588 DOI: 10.1021/ja401390v] [Citation(s) in RCA: 42] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
The synthesis of the Lewis acid-base adducts of B(C6F5)3 and BF3 with [DAAmRe(O)(X)] DAAm = N,N-bis(2-arylaminoethyl)methylamine; aryl = C6F5 (X = Me, 1, COCH3, 2, Cl, 3) as well as their diamidopyridine (DAP) (DAP=(2,6-bis((mesitylamino)methyl)pyridine) analogues, [DAPRe(O)(X)] (X = Me, 4, Cl, 5, I, 6, and COCH3,7), are described. In these complexes the terminal oxo ligands act as nucleophiles. In addition we also show that stoichiometric reactions between 3 and triarylphosphine (PAr3) result in the formation of triarylphosphine oxide (OPAr3). The electronic dependence of this reaction was studied by comparing the rates of oxygen atom transfer for various para-substituted triaryl phosphines in the presence of CO. From these experiments a reaction constant ρ = -0.29 was obtained from the Hammett plot. This suggests that the oxygen atom transfer reaction is consistent with nucleophilic attack of phosphorus on an electrophilic metal oxo. To the best of our knowledge, these are the first examples of mono-oxo d(2) metal complexes in which the oxo ligand exhibits ambiphilic reactivity.
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Affiliation(s)
- Jessica L Smeltz
- Department of Chemistry, North Carolina State University, 2620 Yarbrough Drive, Raleigh, North Carolina 27695-8204, United States
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Basu P, Kail BW, Adams AK, Nemykin VN. Quantitation of the ligand effect in oxo-transfer reactions of dioxo-Mo(VI) trispyrazolyl borate complexes. Dalton Trans 2012; 42:3071-81. [PMID: 23212540 DOI: 10.1039/c2dt32349d] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The oxygen atom transfer reactivity (OAT) of dioxo-Mo(VI) complexes of hydrotrispyrazolyl borate (hydrotris(3,5-dimethylpyrazolyl)borate, Tp(Me2); hydrotris(3-isopropylpyrazol-1-yl)borate, Tp(iPr)) with tertiary phosphines (PMe(3), PMe(2)Ph, PEt(3), PEt(2)Ph, PBu(n)(3), PMePh(2), or PEtPh(2)) has been investigated. In acetonitrile, these reactions proceed via the formation of a phosphoryl intermediate complex that undergoes a solvolysis reaction. We report the synthesis and characterization of several phosphoryl complexes. The rates of formation of phosphoryl complexes and their solvation were determined by spectrophotometry. The rates of the reactions and the properties of the phosphoryl species were investigated using the Quantitative Analysis of Ligand Effect (QALE) methodology. The results show that, at least in this system, the first step of the reaction is controlled primarily by the steric factor, and in the second step, both electronic and steric factors are important. We also analyzed the effect of ligands on the reaction rate i.e., Tp(Me2)vs. Tp(iPr).
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Affiliation(s)
- Partha Basu
- Department of Chemistry and Biochemistry, Duquesne University, Pittsburgh, PA 15228, USA.
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22
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Pasayat S, Dash SP, Saswati, Majhi PK, Patil YP, Nethaji M, Dash HR, Das S, Dinda R. Mixed-ligand aroylhydrazone complexes of molybdenum: Synthesis, structure and biological activity. Polyhedron 2012. [DOI: 10.1016/j.poly.2012.03.007] [Citation(s) in RCA: 46] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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23
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Synthesis and structural characterization of mono- and dinuclear Mo(V)-oxo-complexes containing bis(3,5-dimethylpyrazol-1-yl)acetate anion as ligand. INORG CHEM COMMUN 2011. [DOI: 10.1016/j.inoche.2010.11.013] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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24
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Arumuganathan T, Mayilmurugan R, Volpe M, Mösch-Zanetti NC. Faster oxygen atom transfer catalysis with a tungsten dioxo complex than with its molybdenum analog. Dalton Trans 2011; 40:7850-7. [DOI: 10.1039/c1dt10248f] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
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25
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Basu P, Kail BW, Young CG. Influence of the oxygen atom acceptor on the reaction coordinate and mechanism of oxygen atom transfer from the dioxo-Mo(VI) complex, Tp(iPr)MoO(2)(OPh), to tertiary phosphines. Inorg Chem 2010; 49:4895-900. [PMID: 20433155 PMCID: PMC2897133 DOI: 10.1021/ic902500h] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
The oxygen atom transfer reactivity of the dioxo-Mo(VI) complex, Tp(iPr)MoO(2)(OPh) (Tp(iPr) = hydrotris(3-isopropylpyrazol-1-yl)borate), with a range of tertiary phosphines (PMe(3), PMe(2)Ph, PEt(3), PBu(n)(3), PEt(2)Ph, PEtPh(2), and PMePh(2)) has been investigated. The first step in all the reactions follows a second-order rate law indicative of an associative transition state, consistent with nucleophilic attack by the phosphine on an oxo ligand, namely, Tp(iPr)MoO(2)(OPh) + PR(3) --> Tp(iPr)MoO(OPh)(OPR(3)). The calculated free energy of activation for the formation of the OPMe(3) intermediate (Chem. Eur. J. 2006, 12, 7501) is in excellent agreement with the experimental DeltaG() value reported here. The second step of the reaction, that is, the exchange of the coordinated phosphine oxide by acetonitrile, Tp(iPr)MoO(OPh)(OPR(3)) + MeCN --> Tp(iPr)MoO(OPh)(MeCN) + OPR(3), is first-order in starting complex in acetonitrile. The reaction occurs via a dissociative interchange (I(d)) or associative interchange (I(a)) mechanism, depending on the nature of the phosphine oxide. The activation parameters for the solvolysis of Tp(iPr)MoO(OPh)(OPMe(3)) (DeltaH(++) = 56.3 kJ mol(-1); DeltaS(++) = -125.9 J mol(-1) K(-1); DeltaG(++) = 93.8 kJ mol(-1)) and Tp(iPr)MoO(OPh)(OPEtPh(2)) (DeltaH(++) = 66.5 kJ mol(-1); DeltaS(++) = -67.6 J mol(-1) K(-1); DeltaG(++) = 86.7 kJ mol(-1)) by acetonitrile are indicative of I(a) mechanisms. In contrast, the corresponding parameters for the solvolysis reaction of Tp(iPr)MoO(OPh)(OPEt(3)) (DeltaH(++) = 95.8 kJ mol(-1); DeltaS(++) = 26.0 J mol(-1) K(-1); DeltaG(++) = 88.1 kJ mol(-1)) and the remaining complexes by the same solvent are indicative of an I(d) mechanism. The equilibrium constant for the solvolysis of the oxo-Mo(V) phosphoryl complex, [Tp(iPr)MoO(OPh)(OPMe(3))](+), by acetonitrile was calculated to be 1.9 x 10(-6). The oxo-Mo(V) phosphoryl complex is more stable than the acetonitrile analogue, whereas the oxo-Mo(IV) acetonitrile complex is more stable than the phosphoryl analogue. The higher stability of the Mo(V) phosphoryl complex may explain the phosphate inhibition of sulfite oxidase.
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Affiliation(s)
- Partha Basu
- Department of Chemistry and Biochemistry, Duquesne University, Pittsburgh, Pennsylvania 15282, USA.
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Abad Andrade CE, Ma X, Meyer-Klaucke W, Schulzke C. The difference one ligand atom makes – An altered oxygen transfer reaction mechanism caused by an exchange of selenium for sulfur. Polyhedron 2010. [DOI: 10.1016/j.poly.2009.10.018] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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Judmaier ME, Wallner A, Stipicic GN, Kirchner K, Baumgartner J, Belaj F, Mösch-Zanetti NC. Molybdenum(VI) Dioxo Complexes with Tridentate Phenolate Ligands. Inorg Chem 2009; 48:10211-21. [DOI: 10.1021/ic901201s] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Affiliation(s)
- Martina E. Judmaier
- Institut für Chemie, Bereich Anorganische Chemie, Karl-Franzens-Universität Graz, Schubertstrasse 1, 8010 Graz, Austria
| | - Andreas Wallner
- Institut für Chemie, Bereich Anorganische Chemie, Karl-Franzens-Universität Graz, Schubertstrasse 1, 8010 Graz, Austria
| | - Gregor N. Stipicic
- Institut für angewandte Synthesechemie, Technische Universität Wien, Getreidemarkt 9, 1060 Wien, Austria
| | - Karl Kirchner
- Institut für angewandte Synthesechemie, Technische Universität Wien, Getreidemarkt 9, 1060 Wien, Austria
| | - Judith Baumgartner
- Institut für Anorganische Chemie, Technische Universität Graz, Stremayrgasse 16, 8010 Graz, Austria
| | - Ferdinand Belaj
- Institut für Chemie, Bereich Anorganische Chemie, Karl-Franzens-Universität Graz, Schubertstrasse 1, 8010 Graz, Austria
| | - Nadia C. Mösch-Zanetti
- Institut für Chemie, Bereich Anorganische Chemie, Karl-Franzens-Universität Graz, Schubertstrasse 1, 8010 Graz, Austria
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Ceylan Bİ, Kurt YD, Ülküseven B. Synthesis and characterization of new dioxomolybdenum(VI) complexes derived from benzophenone-thiosemicarbazone (H2L). Crystal structure of [MoO2L(PrOH)]. J COORD CHEM 2009. [DOI: 10.1080/00958970802339669] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Affiliation(s)
- Berat İlhan Ceylan
- a Department of Chemistry , Istanbul University , 34320, Avcılar, Istanbul, Turkey
| | | | - Bahrı Ülküseven
- a Department of Chemistry , Istanbul University , 34320, Avcılar, Istanbul, Turkey
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Lyashenko G, Saischek G, Judmaier ME, Volpe M, Baumgartner J, Belaj F, Jancik V, Herbst-Irmer R, Mösch-Zanetti NC. Oxo-molybdenum and oxo-tungsten complexes of Schiff bases relevant to molybdoenzymes. Dalton Trans 2009:5655-65. [DOI: 10.1039/b820629e] [Citation(s) in RCA: 48] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
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Kurt YD, Pozan GS, Kızılcıklı İ, Ülküseven B. Dioxomolybdenum(VI) complexes of 2-hydroxybenzaldehyde 4-phenyl-S-methylthiosemicarbazone. RUSS J COORD CHEM+ 2007. [DOI: 10.1134/s1070328407110097] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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Tran BL, Carrano CJ. Synthesis and characterization of heteroscorpionate dioxo-tungsten(VI) complexes. Inorganica Chim Acta 2007. [DOI: 10.1016/j.ica.2006.10.024] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Ma X, Schulzke C, Schmidt HG, Noltemeyer M. Structural, electrochemical and oxygen atom transfer properties of a molybdenum selenoether complex [Mo2O4(OC3H6SeC3H6O)2] and its thioether analogue [Mo2O4(OC3H6SC3H6O)2]. Dalton Trans 2007:1773-80. [PMID: 17471372 DOI: 10.1039/b617652f] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The first crystallographically characterized molybdenum(vi) selenoether complex [Mo(2)O(4)(OC(3)H(6)SeC(3)H(6)O)(2)] and its thioether analogue [Mo(2)O(4)(OC(3)H(6)SC(3)H(6)O)(2)] were synthesised. Their structural, electrochemical and oxygen atom transfer properties are compared. This is relevant for the molybdenum cofactors of the DMSO reductase family where the coordination of the active site metal occurs through O (serine/aspartate), S (cysteine) or Se (selenocysteine). Both structures are almost identical except for those parameters that are directly derived from the different sizes of the varied ligand atoms (Se and S). No trans influence was observed. The metal centered redox process (Mo(V)<-->Mo(VI)) is at slightly lower voltage for the sulfur than for the selenium complex. The selenium compound catalyses the oxygen atom transfer from DMSO to PPh(3) by a different mechanism and at a higher rate than the sulfur compound, which is an indication that cysteine and selenocysteine might be used for a purpose in the different molybdenum and tungsten cofactors.
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Manivannan V, Hoffman JT, Dimayuga VL, Dwight T, Carrano CJ. A comparison of vanadyl acetylacetonate complexes of N2O heteroscorpionate ligands that vary systematically in donor set. Inorganica Chim Acta 2007. [DOI: 10.1016/j.ica.2006.07.089] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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34
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Lehtonen A, Wasberg M, Sillanpää R. Dioxomolybdenum(VI) and -tungsten(VI) complexes with tetradentate aminobis(phenol)s. Polyhedron 2006. [DOI: 10.1016/j.poly.2005.07.037] [Citation(s) in RCA: 43] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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35
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Kail BW, Basu P. Solvent effects in the geometric reorganization of an oxo-molybdenum(v) system. Dalton Trans 2006:1419-23. [PMID: 16518511 DOI: 10.1039/b508543h] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
We have previously postulated a serine gated electron transfer hypothesis (Inorg. Chem, 2002, 41, 1281-1291) to possibly be involved in gating electron transfer between the Mo(V) and Mo(IV) states. In this study we explored the effect of solvent dielectric upon the rate and mechanism of isomerization of an oxo-Mo(V) core in attempt to understand the effect of solvent polarity to the isomerization reaction. To this end, the data suggests that there may be significant entropic contributions to the reorganization of metal center as a function of the local dielectric constant. Furthermore, we note that there is a change in the observed rate as well as the mechanism of the geometric rearrangement when it is examined in polar and non-polar environments. More specifically, in low dielectric media, the reaction proceeds either via a fast dissociation which is then followed by a twist mechanism or by a dissociation that is synchronized with the twist mechanism.
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Affiliation(s)
- Brian W Kail
- Department of Chemistry and Biochemistry, Duquesne University, Pittsburgh, PA 15282, USA
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Hoffman JT, Tran BL, Carrano CJ. Oxidation-state and metal-ion dependent stereoisomerization in oxo molybdenum and tungsten complexes of a bulky alkoxy heteroscorpionate ligand. Dalton Trans 2006:3822-30. [PMID: 16883409 DOI: 10.1039/b604751c] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Monooxo Mo(V) complexes of a N2O heteroscorpionate ligand designated (L10O) are found to exist as isolable cis and trans isomers. We have been able to trap the kinetically labile cis isomer and follow its isomerization to the thermodynamically more stable trans form. We have also followed the kinetics of isomerization between the cis and trans isomers of the corresponding dioxo Mo(VI) and W(VI) species. Here the trans is the labile isomer that spontaneously converts to the thermodynamically more stable cis. It is observed that at 60 degrees C in DMSO the Mo(VI) complex isomerizes approximately 6.5 times faster than the Mo(V) and nearly 5 times faster than the corresponding W(VI) analogs. The temperature dependence to the kinetics of the Mo(V) and Mo(VI) isomerizations give activation parameters that are similar for both oxidation states and consistent with those previously observed in [(L1O)MoOCl2] suggesting a similar twist mechanism is operating in all cases. Thus there are oxidation state, metal ion and donor atom dependent differences in isomeric stability that could have significant implications for understanding the mechanisms of both enzymatic and nonenzymatic oxo atom transfer reactions catalyzed by complexes of Mo, W and Re.
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Affiliation(s)
- Justin T Hoffman
- Department of Chemistry and Biochemistry, San Diego State University, San Diego, CA 82182-1030, USA
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