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Henry Martínez Q, Valezi DF, Di Mauro E, Páez-Mozo EA, Fernando Martínez O. Characterization of peroxo-Mo and superoxo-Mo intermediate adducts in Photo-Oxygen Atom Transfer with O2. Catal Today 2022. [DOI: 10.1016/j.cattod.2022.02.016] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/02/2022]
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2
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Synthesis and molecular structure of half-sandwich ruthenium(II) complexes containing pyrazolyl ligands: Solvent induced geometrical change in κ2-scorpionate supported complex. J Mol Struct 2022. [DOI: 10.1016/j.molstruc.2021.132005] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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3
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Kuriakose D, Prathapachandra Kurup M. Supramolecular frameworks formed via hydrogen bonding and non-covalent interactions and interaction energy calculations of solvent coordinated cis-dioxomolybdenum(VI) complexes derived from ONO donor aroylhydrazone: Cytotoxicity studies. Inorganica Chim Acta 2020. [DOI: 10.1016/j.ica.2020.119472] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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4
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Modec B, Dolenc D. Molybdenum complexes with citrate revisited. A mononuclear [MoVOCl4(H2O)]− ion as a new synthetic entry. Inorganica Chim Acta 2019. [DOI: 10.1016/j.ica.2019.119006] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
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5
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Syntheses and Biological Studies of Cu(II) Complexes Bearing Bis(pyrazol-1-yl)- and Bis(triazol-1-yl)-acetato Heteroscorpionate Ligands. Molecules 2019; 24:molecules24091761. [PMID: 31067640 PMCID: PMC6539868 DOI: 10.3390/molecules24091761] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2019] [Revised: 04/29/2019] [Accepted: 05/03/2019] [Indexed: 11/16/2022] Open
Abstract
Copper(II) complexes of bis(pyrazol-1-yl)- and bis(triazol-1-yl)-acetate heteroscorpionate ligands have been synthesized. The copper(II) complexes [HC(COOH)(pzMe2)2]Cu[HC(COO)(pzMe2)2]·ClO4, [HC(COOH)(pz)2]2Cu(ClO4)2 (pzMe2 = 3,5-dimethylpyrazole; pz = pyrazole) were prepared by the reaction of Cu(ClO4)2·6H2O with bis(3,5-dimethylpyrazol-1-yl)acetic acid (HC(COOH)(pzMe2)2) and bis(pyrazol-1-yl)acetic acid (HC(COOH)(pz)2) ligands in ethanol solution. The copper(II) complex [HC(COOH)(tz)2]2Cu(ClO4)2·CH3OH (tz = 1,2,4-triazole) was prepared by the reaction of Cu(ClO4)2·6H2O with bis(1,2,4-triazol-1-yl)acetic acid (HC(COOH)(tz)2) ligand in methanol solution. The synthesized Cu(II) complexes, as well as the corresponding uncoordinated ligands, were evaluated for their cytotoxic activity in monolayer and 3D spheroid cancer cell cultures with different Pt(II)-sensitivity. The results showed that [HC(COOH)(pzMe2)2]Cu[HC(COO)(pzMe2)2]·ClO4 was active against cancer cell lines derived from solid tumors at low IC50 and this effect was retained in the spheroid model. Structure and ultra-structure changes of treated cancer cells analyzed by Transmission Electron Microscopy (TEM) highlighted the induction of a cytoplasmic vacuolization, thus suggesting paraptotic-like cancer cell death triggering.
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6
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Luna Barros M, Cushion MG, Schwarz AD, Turner ZR, Mountford P. Magnesium, calcium and zinc [N 2N'] heteroscorpionate complexes. Dalton Trans 2019; 48:4124-4138. [PMID: 30638242 DOI: 10.1039/c8dt04985h] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A new family of sterically demanding N2N' heteroscorpionate pro-ligands (HC(tBu2pz)2SiMe2N(H)R (R = iPr, tBu, Ph, Xyl)) has been prepared via a straightforward modular synthetic route. An extensive study into the synthesis and characterisation of lithium, magnesium, calcium and zinc complexes supported by both 3,5-tBu and 3,5-Me substituted N2N' ligand families has been conducted. Attempted deprotonation of the pro-ligands with nBuLi afforded the corresponding lithium salts Li{HC(tBu2pz)2SiMe2NR} (R = iPr (1), tBu (2), Ph (3) and Xyl (4)) but air- and thermal-sensitivity limited the yields of these potentially useful precursors; only the sterically encumbered ligand system allowed clean reactivity. Magnesium methyl complexes Mg{HC(tBu2pz)2SiMe2NR}Me (R = iPr (5) and R = Ph (6)) were prepared using an excess of the Grignard reagent MeMgCl. Magnesium butyl complexes were synthesised in good yields using the dialkyl precursor MgnBu2 to afford Mg{HC(R'2pz)2SiMe2NR}nBu (R' = Me; R = iPr (7), tBu (8), Ad (9), Ph (10). R' = tBu; R = iPr (11), Ph (12)). Protonolylsis reactions were used to synthesise magnesium and calcium amide complexes Mg{HC(R'2pz)2SiMe2NR}{N(SiHMe2)2} (R' = Me; R = iPr (13), tBu (14), Ph (15). R' = tBu; R = Ph (16)) or Mg{HC(R'2pz)2SiMe2NR}{N(SiMe3)2} (R' = Me; R = iPr (17), tBu (18), Ph (19). R' = tBu; R = Ph (20)), and Ca{HC(R'2pz)2SiMe2NR}{N(SiMe2)2} (L) (R' = Me; L = thf; R = iPr (21), tBu (22), Ph (23). R' = tBu; L = none; R = Ph (24). Zinc methyl complexes Zn{HC(R'2pz)2SiMe2NR}Me (R' = Me; R = iPr (25), tBu (26), Ph (27). R' = tBu; R = Ph (28)) were prepared by reaction of the N2N' heteroscorpionate pro-ligands with ZnMe2. In preliminary studies, magnesium amide complexes 16 and 20 were evaluated as initiators for the ring-opening polymerisation (ROP) of ε-caprolactone (ε-CL) and rac-lactide (rac-LA). Although the overall polymerisation control was poor, 16 and 20 were found to be active initiators.
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Affiliation(s)
- Mariana Luna Barros
- Chemistry Research Laboratory, Department of Chemistry, University of Oxford, Mansfield Road, Oxford, OX1 3TA, UK.
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7
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Paudel J, Pokhrel A, Kirk ML, Li F. Remote Charge Effects on the Oxygen-Atom-Transfer Reactivity and Their Relationship to Molybdenum Enzymes. Inorg Chem 2019; 58:2054-2068. [PMID: 30673233 DOI: 10.1021/acs.inorgchem.8b03093] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
We report the syntheses, crystal structures, and characterization of the novel cis-dioxomolybdenum(VI) complexes [Tpm*MoVIO2Cl](MoO2Cl3) (1) and [Tpm*MoVIO2Cl](ClO4) (2), which are supported by the charge-neutral tris(3,5-dimethyl-1-pyrazolyl)methane (Tpm*) ligand. A comparison between isostructural [Tpm*MoVIO2Cl]+ and Tp*MoVIO2Cl [Tp* = hydrotris(3,5-dimethyl-1-pyrazolyl)borate] reveals the effects of one unit of overall charge difference on their spectroscopic and electrochemical properties, geometric and electronic structures, and O-atom-transfer (OAT) reactivities, providing new insight into pyranopterin molybdoenzyme OAT reactivity. Computational studies of these molecules indicate that the delocalized positive charge lowers the lowest unoccupied molecular orbital (LUMO) energy of cationic [Tpm*MoO2Cl]+ relative to Tp*MoO2Cl. Despite their virtually identical geometric structures revealed by crystal structures, the MoVI/MoV redox potential of 2 is increased by 350 mV relative to that of Tp*MoVIO2Cl. This LUMO stabilization also contributes to an increased effective electrophilicity of [Tpm*MoO2Cl]+ relative to that of Tp*MoO2Cl, resulting in a more favorable resonant interaction between the molydenum complex LUMO and the highest occupied molecular orbital (HOMO) of the PPh3 substrate. This leads to a greater thermodynamic driving force, an earlier transition state, and a lowered activation barrier for the orbitally controlled first step of the OAT reaction in the Tpm* system relative to the Tp* system. An Eyring plot analysis shows that this initial step yields an O≡MoIV-OPPh3 intermediate via an associative transition state, and the reaction is ∼500-fold faster for 2 than for Tp*MoO2Cl. The second step of the OAT reaction entails solvolysis of the O≡MoIV-OPPh3 intermediate to afford the solvent-substituted MoIV product and is 750-fold faster for the Tpm* system at -15 °C compared to the Tp* system. The observed rate enhancement for the second step is ascribed to a switch of the reaction mechanism from a dissociative pathway for the Tp* system to an alternative associative pathway for the Tpm* system. This is due to a more Lewis acidic MoIV center in the Tpm* system.
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Affiliation(s)
- Jaya Paudel
- Department of Chemistry and Biochemistry , New Mexico State University , Las Cruces , New Mexico 88003 , United States
| | - Amrit Pokhrel
- Department of Chemistry and Chemical Biology , The University of New Mexico , Albuquerque , New Mexico 87131 , United States
| | - Martin L Kirk
- Department of Chemistry and Chemical Biology , The University of New Mexico , Albuquerque , New Mexico 87131 , United States
| | - Feifei Li
- Department of Chemistry and Biochemistry , New Mexico State University , Las Cruces , New Mexico 88003 , United States
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8
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Pellei M, Gandin V, Cimarelli C, Quaglia W, Mosca N, Bagnarelli L, Marzano C, Santini C. Syntheses and biological studies of nitroimidazole conjugated heteroscorpionate ligands and related Cu(I) and Cu(II) complexes. J Inorg Biochem 2018; 187:33-40. [PMID: 30053534 DOI: 10.1016/j.jinorgbio.2018.07.008] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2018] [Revised: 07/04/2018] [Accepted: 07/18/2018] [Indexed: 12/18/2022]
Abstract
Copper(I) and copper(II) complexes of 5-nitroimidazole conjugated heteroscorpionate ligands have been synthesized. In particular, the new 2,2-bis(pyrazol-1-yl)-N-(2-(2-methyl-5-nitro-1H-imidazol-1-yl)ethyl)acetamide ligand (LHMN) was synthesized by direct coupling of preformed side chain acid with 5-nitroimidazole and its coordination chemistry was investigated towards Cu(I) and Cu(II) acceptors and compared with that of the related 2,2-bis(3,5-dimethyl-1-H-pyrazol-1-yl)-N-(2-(2-methyl-5-nitro-1H-imidazol-1-yl)ethyl)acetamide ligand (LMeMN). The copper(II) complexes {[(LMeMN)2Cu]Cl2} and {[(LHMN)2Cu]Cl2} were prepared by the reaction of CuCl2·2H2O with LHMN or LMeMN ligands in methanol solution. The water soluble copper(I) complexes {[(LMeMN)Cu(PTA)2]}(PF6) and {[(LHMN)Cu(PTA)2]}(PF6) were prepared by the reaction of Cu(CH3CN)4PF6 and 1,3,5-triaza-7-phosphaadamantane (PTA) with LHMN or LMeMN ligands in acetonitrile solution. The new Cu(I) and Cu(II) complexes as well as the corresponding uncoordinated ligands were evaluated for their cytotoxic activity against 2D monolayer cultures of multiple human cancer cell lines and 3D-cultured HCT-15 colon cancer spheroids. Morphological analysis by Transmission Electron Microscopy (TEM) revealed the induction of a massive cytoplasmic vacuolization consistent with a paraptotic-like cancer cell death.
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Affiliation(s)
- Maura Pellei
- School of Science and Technology, Chemistry Division, University of Camerino, via S. Agostino 1, 62032 Camerino, Macerata, Italy.
| | - Valentina Gandin
- Department of Pharmaceutical and Pharmacological Sciences, University of Padova, via Marzolo 5, 35131 Padova, Italy.
| | - Cristina Cimarelli
- School of Science and Technology, Chemistry Division, University of Camerino, via S. Agostino 1, 62032 Camerino, Macerata, Italy
| | - Wilma Quaglia
- School of Pharmacy, Medicinal Chemistry Unit, University of Camerino, Via S. Agostino 1, 62032 Camerino, Macerata, Italy
| | - Nello Mosca
- School of Science and Technology, Chemistry Division, University of Camerino, via S. Agostino 1, 62032 Camerino, Macerata, Italy
| | - Luca Bagnarelli
- School of Science and Technology, Chemistry Division, University of Camerino, via S. Agostino 1, 62032 Camerino, Macerata, Italy
| | - Cristina Marzano
- Department of Pharmaceutical and Pharmacological Sciences, University of Padova, via Marzolo 5, 35131 Padova, Italy
| | - Carlo Santini
- School of Science and Technology, Chemistry Division, University of Camerino, via S. Agostino 1, 62032 Camerino, Macerata, Italy
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9
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Mede R, Traber J, Klein M, Görls H, Gessner G, Hoffmann P, Schmitt M, Popp J, Heinemann SH, Neugebauer U, Westerhausen M. Synthesis and solution stability of water-soluble κ 2N,κO-bis(3,5-dimethylpyrazolyl)ethanol manganese(i) tricarbonyl bromide (CORM-ONN1). Dalton Trans 2018; 46:1684-1693. [PMID: 28102423 DOI: 10.1039/c6dt03551e] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The reaction of (OC)5MnBr with bis(3,5-dimethyl-1-pyrazolyl)methane yields [{(PzMe2)2CH2}Mn(CO)3Br] (1). The use of tridentate heteroscorpionates such as bis(3,5-dimethyl-1-pyrazolyl)acetic acid and 2,2-bis(3,5-dimethyl-1-pyrazolyl)ethanol leads to the formation of mononuclear [(OC)3Mn{(PzMe2)2CH-CO2}] (2) and [(OC)3Mn{(PzMe2)2CH-CH2OH}]Br (3, CORM-ONN1). Salt-like photoCORM 3 is soluble in aqueous media up to a concentration of 200 μM, non-toxic up to an approx. 65 μM solution and releases all carbonyl ligands upon irradiation. The molecular complexes 1 and 2 are insoluble in aqueous solutions. CORM-ONN1 (3) slowly degrades in methanol yielding iCORM 4, consisting of the complex cation [{(PzMe2)2CH-CH2OH}{(PzMe2)2CH-CH2O}Mn]+ and the [Mn(CO)5]- counter anion with the cations linked to a dimeric unit by intermolecular hydrogen bridges between the alcohol and alkoxide functionalities.
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Affiliation(s)
- Ralf Mede
- Institute of Inorganic and Analytical Chemistry, Friedrich Schiller University (FSU), Humboldstraße 8, D-07743 Jena, Germany.
| | - Juliane Traber
- Institute of Inorganic and Analytical Chemistry, Friedrich Schiller University (FSU), Humboldstraße 8, D-07743 Jena, Germany.
| | - Moritz Klein
- Institute of Physical Chemistry, Friedrich Schiller University Jena, Helmholtzweg 4, D-07743 Jena, Germany and Leibniz Institute of Photonic Technology (IPHT), Albert-Einstein-Straße 9, D-07745 Jena, Germany
| | - Helmar Görls
- Institute of Inorganic and Analytical Chemistry, Friedrich Schiller University (FSU), Humboldstraße 8, D-07743 Jena, Germany.
| | - Guido Gessner
- Center for Molecular Biomedicine (CMB), Department of Biophysics, Friedrich Schiller University Jena and Jena University Hospital, Hans-Knöll-Straße 2, D-07745 Jena, Germany
| | - Patrick Hoffmann
- Leibniz Institute of Photonic Technology (IPHT), Albert-Einstein-Straße 9, D-07745 Jena, Germany and Center for Sepsis Control and Care (CSCC), Jena University Hospital, Am Klinikum 1, D-07747 Jena, Germany
| | - Michael Schmitt
- Institute of Physical Chemistry, Friedrich Schiller University Jena, Helmholtzweg 4, D-07743 Jena, Germany and Leibniz Institute of Photonic Technology (IPHT), Albert-Einstein-Straße 9, D-07745 Jena, Germany
| | - Jürgen Popp
- Institute of Physical Chemistry, Friedrich Schiller University Jena, Helmholtzweg 4, D-07743 Jena, Germany and Leibniz Institute of Photonic Technology (IPHT), Albert-Einstein-Straße 9, D-07745 Jena, Germany and Center for Sepsis Control and Care (CSCC), Jena University Hospital, Am Klinikum 1, D-07747 Jena, Germany
| | - Stefan H Heinemann
- Center for Molecular Biomedicine (CMB), Department of Biophysics, Friedrich Schiller University Jena and Jena University Hospital, Hans-Knöll-Straße 2, D-07745 Jena, Germany
| | - Ute Neugebauer
- Institute of Physical Chemistry, Friedrich Schiller University Jena, Helmholtzweg 4, D-07743 Jena, Germany and Leibniz Institute of Photonic Technology (IPHT), Albert-Einstein-Straße 9, D-07745 Jena, Germany and Center for Sepsis Control and Care (CSCC), Jena University Hospital, Am Klinikum 1, D-07747 Jena, Germany
| | - Matthias Westerhausen
- Institute of Inorganic and Analytical Chemistry, Friedrich Schiller University (FSU), Humboldstraße 8, D-07743 Jena, Germany.
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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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11
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Bis(pyrazolyl)acetate and bis(3,5-dimethylpyrazolyl)acetate tris -acetonitrile ruthenium(II) complexes: Synthesis, properties, and structure. J Organomet Chem 2017. [DOI: 10.1016/j.jorganchem.2017.05.060] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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12
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Zheng M, Wu H, Zhang X, Zhang J. Heteroscorpionate bis-pyrazolyl ligands in Cr(III)-catalyzed ethylene oligomerization. J Organomet Chem 2016. [DOI: 10.1016/j.jorganchem.2016.04.033] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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13
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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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14
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Martínez J, Otero A, Lara-Sánchez A, Castro-Osma JA, Fernández-Baeza J, Sánchez-Barba LF, Rodríguez AM. Heteroscorpionate Rare-Earth Catalysts for the Hydroalkoxylation/Cyclization of Alkynyl Alcohols. Organometallics 2016. [DOI: 10.1021/acs.organomet.6b00203] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Affiliation(s)
- Javier Martínez
- Universidad de Castilla-La Mancha, Departamento de Química
Inorgánica, Orgánica y Bioquímica, Instituto
Regional de Investigación Científica Aplicada (IRICA),
Centro de Innovación en Química Avanzada (ORFEO-CINQA), 13071 Ciudad Real, Spain
| | - Antonio Otero
- Universidad de Castilla-La Mancha, Departamento de Química
Inorgánica, Orgánica y Bioquímica, Instituto
Regional de Investigación Científica Aplicada (IRICA),
Centro de Innovación en Química Avanzada (ORFEO-CINQA), 13071 Ciudad Real, Spain
| | - Agustín Lara-Sánchez
- Universidad de Castilla-La Mancha, Departamento de Química
Inorgánica, Orgánica y Bioquímica, Instituto
Regional de Investigación Científica Aplicada (IRICA),
Centro de Innovación en Química Avanzada (ORFEO-CINQA), 13071 Ciudad Real, Spain
| | - José Antonio Castro-Osma
- Universidad de Castilla-La Mancha, Departamento de Química
Inorgánica, Orgánica y Bioquímica, Instituto
Regional de Investigación Científica Aplicada (IRICA),
Centro de Innovación en Química Avanzada (ORFEO-CINQA), 13071 Ciudad Real, Spain
| | - Juan Fernández-Baeza
- Universidad de Castilla-La Mancha, Departamento de Química
Inorgánica, Orgánica y Bioquímica, Instituto
Regional de Investigación Científica Aplicada (IRICA),
Centro de Innovación en Química Avanzada (ORFEO-CINQA), 13071 Ciudad Real, Spain
| | - Luis F. Sánchez-Barba
- Departamento
de Biología y Geología, Física y Química
Inorgánica, Universidad Rey Juan Carlos, Móstoles, 28933 Madrid, Spain
| | - Ana M. Rodríguez
- Universidad de Castilla-La Mancha, Departamento de Química
Inorgánica, Orgánica y Bioquímica, Instituto
Regional de Investigación Científica Aplicada (IRICA),
Centro de Innovación en Química Avanzada (ORFEO-CINQA), 13071 Ciudad Real, Spain
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15
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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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16
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Paul T, Rodehutskors PM, Schmidt J, Burzlaff N. Oxygen Atom Transfer Catalysis with Homogenous and Polymer-Supported N,N- and N,N,O-Heteroscorpionate Dioxidomolybdenum(VI) Complexes. Eur J Inorg Chem 2016. [DOI: 10.1002/ejic.201600026] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Tobias Paul
- Inorganic Chemistry; Department of Chemistry and Pharmacy & Interdisciplinary Center for Molecular Materials (ICMM); University of Erlangen-Nürnberg; Egerlandstr. 1 91058 Erlangen Germany
| | - Philipp M. Rodehutskors
- Inorganic Chemistry; Department of Chemistry and Pharmacy & Interdisciplinary Center for Molecular Materials (ICMM); University of Erlangen-Nürnberg; Egerlandstr. 1 91058 Erlangen Germany
| | - Jochen Schmidt
- Inorganic Chemistry; Department of Chemistry and Pharmacy & Interdisciplinary Center for Molecular Materials (ICMM); University of Erlangen-Nürnberg; Egerlandstr. 1 91058 Erlangen Germany
| | - Nicolai Burzlaff
- Inorganic Chemistry; Department of Chemistry and Pharmacy & Interdisciplinary Center for Molecular Materials (ICMM); University of Erlangen-Nürnberg; Egerlandstr. 1 91058 Erlangen Germany
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17
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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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18
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Wathier M, Love JA. Hydroelementation of Unsaturated C-C Bonds Catalyzed by Metal Scorpionate Complexes. Eur J Inorg Chem 2016. [DOI: 10.1002/ejic.201501272] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Affiliation(s)
- Matthew Wathier
- Department of Chemistry; The University of British Columbia; 2036 Main Mall V6T 1Z1 Vancouver BC CanadaV6T 1Z1
| | - Jennifer A. Love
- Department of Chemistry; The University of British Columbia; 2036 Main Mall V6T 1Z1 Vancouver BC CanadaV6T 1Z1
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19
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Márquez-Segovia I, Lara-Sánchez A, Otero A, Fernández-Baeza J, Castro-Osma JA, Sánchez-Barba LF, Rodríguez AM. Synthesis and structural characterization of amido scorpionate rare earth metals complexes. Dalton Trans 2014; 43:9586-95. [DOI: 10.1039/c4dt00770k] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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20
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Quillian B, Joslin EE, Gunnoe TB, Sabat M, Myers WH. 2,2,2-Tris(pyrazolyl)ethoxide (EpOX) Ruthenium(II) Complexes, (EpOX)RuCl(L)(L′): Synthesis, Structure, and Reactivity. Inorg Chem 2012; 52:1113-21. [DOI: 10.1021/ic3024474] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Brandon Quillian
- Department
of Chemistry, University of Virginia, Charlottesville,
Virginia 22904, United States
| | - Evan E. Joslin
- Department
of Chemistry, University of Virginia, Charlottesville,
Virginia 22904, United States
| | - T. Brent Gunnoe
- Department
of Chemistry, University of Virginia, Charlottesville,
Virginia 22904, United States
| | - Michal Sabat
- Nanoscale Material Characterization Facility, Department of Materials
Science and Engineering, University of Virginia, Charlottesville, Virginia 22904, United States
| | - William H. Myers
- Department of Chemistry, University of Richmond, Richmond, Virginia 23173, United States
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21
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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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Bortoluzzi M, Paolucci G, Fregona D, Via LD, Enrichi F. Group 3 and lanthanide triflate-complexes with [N,N,O]-donor ligands: synthesis, characterization, and cytotoxic activity. J COORD CHEM 2012. [DOI: 10.1080/00958972.2012.728591] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Affiliation(s)
- Marco Bortoluzzi
- a Dipartimento di Scienze Molecolari e Nanosistemi , Università Ca’ Foscari Venezia , Dorsoduro 2137, 30121 Venezia , Italy
| | - Gino Paolucci
- a Dipartimento di Scienze Molecolari e Nanosistemi , Università Ca’ Foscari Venezia , Dorsoduro 2137, 30121 Venezia , Italy
| | - Dolores Fregona
- b Dipartimento di Scienze Chimiche , via Marzolo 1, 35131 Padova , Italy
| | - Lisa Dalla Via
- c Dipartimento di Scienze del Farmaco , via Marzolo 5, 35131 Padova , Italy
| | - Francesco Enrichi
- d CIVEN, Coordinamento Interuniversitario Veneto per le Nanotecnologie , via delle Industrie 5, 30175 Marghera (Venezia) , Italy
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23
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Castellanos NJ, Martínez F, Páez-Mozo EA, Ziarelli F, Arzoumanian H. Bis(3,5-dimethylpyrazol-1-yl)acetate bound to titania and complexed to molybdenum dioxido as a bidentate N,N′-ligand. Direct comparison with a bipyridyl analog in a photocatalytic arylalkane oxidation by O2. TRANSIT METAL CHEM 2012. [DOI: 10.1007/s11243-012-9631-2] [Citation(s) in RCA: 8] [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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24
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Otero A, Lara-Sánchez A, Nájera C, Fernández-Baeza J, Márquez-Segovia I, Castro-Osma JA, Martínez J, Sánchez-Barba LF, Rodríguez AM. New Highly Active Heteroscorpionate-Containing Lutetium Catalysts for the Hydroamination of Aminoalkenes: Isolation and Structural Characterization of a Dipyrrolidinide–Lutetium Complex. Organometallics 2012. [DOI: 10.1021/om2011672] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Antonio Otero
- Departamento de Quı́mica
Inorgánica, Orgánica
y Bioquı́mica, Universidad de Castilla-La Mancha, 13071-Ciudad Real, Spain
| | - Agustín Lara-Sánchez
- Departamento de Quı́mica
Inorgánica, Orgánica
y Bioquı́mica, Universidad de Castilla-La Mancha, 13071-Ciudad Real, Spain
| | - Carmen Nájera
- Departamento de Quı́mica Orgánica, Facultad de Ciencias, and Instituto de Sı́ntesis Orgánica
(ISO), Universidad de Alicante, Apdo 99,
03080-Alicante, Spain
| | - Juan Fernández-Baeza
- Departamento de Quı́mica
Inorgánica, Orgánica
y Bioquı́mica, Universidad de Castilla-La Mancha, 13071-Ciudad Real, Spain
| | - Isabel Márquez-Segovia
- Departamento de Quı́mica
Inorgánica, Orgánica
y Bioquı́mica, Universidad de Castilla-La Mancha, 13071-Ciudad Real, Spain
| | - José Antonio Castro-Osma
- Departamento de Quı́mica
Inorgánica, Orgánica
y Bioquı́mica, Universidad de Castilla-La Mancha, 13071-Ciudad Real, Spain
| | - Javier Martínez
- Departamento de Quı́mica
Inorgánica, Orgánica
y Bioquı́mica, Universidad de Castilla-La Mancha, 13071-Ciudad Real, Spain
| | - Luis F. Sánchez-Barba
- Departamento de Quı́mica
Inorgánica, Orgánica
y Bioquı́mica, Universidad de Castilla-La Mancha, 13071-Ciudad Real, Spain
| | - Ana M. Rodríguez
- Departamento de Quı́mica
Inorgánica, Orgánica
y Bioquı́mica, Universidad de Castilla-La Mancha, 13071-Ciudad Real, Spain
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25
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Kitanovski N, Golobič A, Čeh B. Synthesis and crystal structure of novel mononuclear Mo(IV) and Mo(III) complexes containing bis(3,5-dimethylpyrazol-1-yl)acetate anion as ligand. INORG CHEM COMMUN 2011. [DOI: 10.1016/j.inoche.2011.01.002] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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26
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Otero A, Lara-Sánchez A, Fernández-Baeza J, Alonso-Moreno C, Castro-Osma JA, Márquez-Segovia I, Sánchez-Barba LF, Rodríguez AM, Garcia-Martinez JC. Neutral and Cationic Aluminum Complexes Supported by Acetamidate and Thioacetamidate Heteroscorpionate Ligands as Initiators for Ring-Opening Polymerization of Cyclic Esters. Organometallics 2011. [DOI: 10.1021/om1010676] [Citation(s) in RCA: 67] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Antonio Otero
- Departamento de Química Inorgánica, Orgánica y Bioquímica, Universidad de Castilla-La Mancha, Campus Universitario, 13071 Ciudad Real, Spain
| | - Agustín Lara-Sánchez
- Departamento de Química Inorgánica, Orgánica y Bioquímica, Universidad de Castilla-La Mancha, Campus Universitario, 13071 Ciudad Real, Spain
| | - Juan Fernández-Baeza
- Departamento de Química Inorgánica, Orgánica y Bioquímica, Universidad de Castilla-La Mancha, Campus Universitario, 13071 Ciudad Real, Spain
| | - Carlos Alonso-Moreno
- Departamento de Química Inorgánica, Orgánica y Bioquímica, Universidad de Castilla-La Mancha, Campus Universitario, 13071 Ciudad Real, Spain
| | - Jose A. Castro-Osma
- Departamento de Química Inorgánica, Orgánica y Bioquímica, Universidad de Castilla-La Mancha, Campus Universitario, 13071 Ciudad Real, Spain
| | - I. Márquez-Segovia
- Departamento de Química Inorgánica, Orgánica y Bioquímica, Universidad de Castilla-La Mancha, Campus Universitario, 13071 Ciudad Real, Spain
| | - Luis F. Sánchez-Barba
- Departamento de Química Inorgánica y Analítica, Universidad Rey Juan Carlos, Móstoles 28933 Madrid, Spain
| | - Ana M. Rodríguez
- Departamento de Química Inorgánica, Orgánica y Bioquímica, Universidad de Castilla-La Mancha, Campus Universitario, 13071 Ciudad Real, Spain
| | - Joaquin C. Garcia-Martinez
- Departamento de Química Inorgánica, Orgánica y Bioquímica, Universidad de Castilla-La Mancha, Campus Universitario, 13071 Ciudad Real, Spain
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27
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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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28
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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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29
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Golobič A, Ceh B. μ-Oxido-bis{[2,2-bis-(3,5-dimethyl-1H-pyrazol-1-yl)acetato-κN,O,N]chloridooxidomolybdenum(V)} mono-hydrate. Acta Crystallogr Sect E Struct Rep Online 2010; 66:m1648-9. [PMID: 21589316 PMCID: PMC3011627 DOI: 10.1107/s1600536810045393] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2010] [Accepted: 11/05/2010] [Indexed: 11/29/2022]
Abstract
In the binuclear title compound, [Mo2(C12H15N4O2)2Cl2O3]·H2O, the complex molecules have approximate C2 symmetry. Both MoV atoms have a distorted octahedral coordination environment with cis-positioned terminal chloride and oxide groups. The heteroscorpionate organic ligand binds to the MoV atom via an N2O donor set. The water molecule bridges two complex molecules, forming O—H⋯O and O—H⋯Cl hydrogen bonds to the acetate group and to the chloride ligands.
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Affiliation(s)
- Amalija Golobič
- Faculty of Chemistry and Chemical Technology, University of Ljubljana, Aškerčeva 5, 1000 Ljubljana, Slovenia
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30
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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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31
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Sugimoto H, Tatemoto S, Suyama K, Miyake H, Itoh S, Dong C, Yang J, Kirk ML. Dioxomolybdenum(VI) complexes with ene-1,2-dithiolate ligands: synthesis, spectroscopy, and oxygen atom transfer reactivity. Inorg Chem 2010; 48:10581-90. [PMID: 19831360 DOI: 10.1021/ic901112s] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
New dioxomolybdenum(VI) complexes, (Et(4)N)(Ph(4)P)[Mo(VI)O(2)(S(2)C(2)(CO(2)Me)(2))(bdt)] (2) and (Et(4)N)(Ph(4)P)[Mo(VI)O(2)(S(2)C(2)(CO(2)Me)(2))(bdtCl(2))](4)(S(2)C(2)(CO(2)Me)(2) = 1,2-dicarbomethoxyethylene-1,2-ditholate, bdt = 1,2-benzenedithiolate, bdtCl(2) = 3,6-dichloro-1,2-benzenedithiolate), that possess at least one ene-1,2-dithiolate ligand were synthesized by the reaction of their mono-oxo-molybdenum(IV) derivatives, (Et(4)N)(2)[Mo(IV)O(S(2)C(2)(CO(2)Me)(2))(bdt)] (1) and (Et(4)N)(2)[Mo(IV)O(S(2)C(2)(CO(2)Me)(2))(bdtCl(2))] (3), with Me(3)NO. Additionally, the bis(ene-1,2-dithiolate)Mo(VI)O(2) complex, (Et(4)N)(Ph(4)P)[Mo(VI)O(2)(S(2)C(2)(CO(2)Me)(2))(2)] (6), was isolated. Complexes 2, 4, and 6 were characterized by elemental analysis, negative-ion ESI mass spectrometry, and IR spectroscopy. X-ray analysis of 4 and 6 revealed a Mo(VI) center that adopts a distorted octahedral geometry. Variable-temperature (1)H NMR spectra of (CD(3))(2)CO solutions of the Mo(VI)O(2) complexes indicated that the Mo centers isomerize between Delta and Lambda forms. The electronic structures of 2, 4, and 6 have been investigated by electronic absorption and resonance Raman spectroscopy and bonding calculations. The results indicate very similar electronic structures for the complexes and considerable pi-delocalization between the Mo(VI)O(2) and ene-1,2-dithiolate units. The similar oxygen atom transfer kinetics for the complexes results from their similar electronic structures.
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Affiliation(s)
- Hideki Sugimoto
- Department of Material and Life Science, Graduate School of Engineering, Osaka University, 2-1 Yamada-oka, Suita, Osaka 565-0871, Japan.
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32
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Otero A, Lara-Sánchez A, Fernández-Baeza J, Martínez-Caballero E, Márquez-Segovia I, Alonso-Moreno C, Sánchez-Barba LF, Rodríguez AM, López -Solera I. New achiral and chiral NNE heteroscorpionate ligands. Synthesis of homoleptic lithium complexes as well as halide and alkyl scandium and yttrium complexes. Dalton Trans 2010; 39:930-40. [DOI: 10.1039/b914966j] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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33
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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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34
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35
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Basu P, Nemykin VN, Sengar RS. Substituent Effect on Oxygen Atom Transfer Reactivity from Oxomolybdenum Centers: Synthesis, Structure, Electrochemistry, and Mechanism. Inorg Chem 2009; 48:6303-13. [DOI: 10.1021/ic900579s] [Citation(s) in RCA: 37] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Partha Basu
- Department of Chemistry and Biochemistry, Duquesne University, Pittsburgh, Pennsylvania 15282
| | - Victor N. Nemykin
- Department of Chemistry and Biochemistry, Duquesne University, Pittsburgh, Pennsylvania 15282
| | - Raghvendra S. Sengar
- Department of Chemistry and Biochemistry, Duquesne University, Pittsburgh, Pennsylvania 15282
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36
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Xie YF, Wen ZK, Tan RY, Hong J, Zhao SB, Tang LF. Bis(3,5-dimethylpyrazol-1-yl)acyl and Bis(3,5-dimethylpyrazol-1-yl)methide Carbonyl Tungsten Derivatives. Organometallics 2008. [DOI: 10.1021/om800603p] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Yun-Fu Xie
- Department of Chemistry, State Key Laboratory of Elemento-Organic Chemistry, Nankai University, Tianjin 300071, People’s Republic of China
| | - Zhen-Kang Wen
- Department of Chemistry, State Key Laboratory of Elemento-Organic Chemistry, Nankai University, Tianjin 300071, People’s Republic of China
| | - Run-Yu Tan
- Department of Chemistry, State Key Laboratory of Elemento-Organic Chemistry, Nankai University, Tianjin 300071, People’s Republic of China
| | - Juan Hong
- Department of Chemistry, State Key Laboratory of Elemento-Organic Chemistry, Nankai University, Tianjin 300071, People’s Republic of China
| | - Shu-Bin Zhao
- Department of Chemistry, State Key Laboratory of Elemento-Organic Chemistry, Nankai University, Tianjin 300071, People’s Republic of China
| | - Liang-Fu Tang
- Department of Chemistry, State Key Laboratory of Elemento-Organic Chemistry, Nankai University, Tianjin 300071, People’s Republic of China
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37
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Pellei M, Alidori S, Camalli M, Campi G, Lobbia GG, Mancini M, Papini G, Spagna R, Santini C. Copper(I)–organophosphine complexes of bis(3,5-dimethylpyrazol-1-yl)dithioacetate ligand. Inorganica Chim Acta 2008. [DOI: 10.1016/j.ica.2007.09.017] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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38
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Wen ZK, Xie YF, Zhao SB, Tan RY, Tang LF. Functionalized bis(pyrazol-1-yl)methanes by organotin halide on the methine carbon atom and their related reactions. J Organomet Chem 2008. [DOI: 10.1016/j.jorganchem.2008.01.041] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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39
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Otero A, Fernández-Baeza J, Antiñolo A, Lara-Sánchez A, Martínez-Caballero E, Tejeda J, Sánchez-Barba LF, Alonso-Moreno C, López-Solera I. Scandium and Yttrium Complexes Supported by NNCp Heteroscorpionate Ligands: Synthesis, Structure, and Polymerization of ϵ-Caprolactone. Organometallics 2008. [DOI: 10.1021/om701033r] [Citation(s) in RCA: 60] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Antonio Otero
- Departamento de Química Inorgánica, Orgánica y Bioquímica, Universidad de Castilla-La Mancha, 13071 Ciudad Real, Spain., and Departamento de Química Inorgánica y Analítica, Universidad Rey Juan Carlos, 28933 Móstoles, Madrid, Spain
| | - Juan Fernández-Baeza
- Departamento de Química Inorgánica, Orgánica y Bioquímica, Universidad de Castilla-La Mancha, 13071 Ciudad Real, Spain., and Departamento de Química Inorgánica y Analítica, Universidad Rey Juan Carlos, 28933 Móstoles, Madrid, Spain
| | - Antonio Antiñolo
- Departamento de Química Inorgánica, Orgánica y Bioquímica, Universidad de Castilla-La Mancha, 13071 Ciudad Real, Spain., and Departamento de Química Inorgánica y Analítica, Universidad Rey Juan Carlos, 28933 Móstoles, Madrid, Spain
| | - Agustín Lara-Sánchez
- Departamento de Química Inorgánica, Orgánica y Bioquímica, Universidad de Castilla-La Mancha, 13071 Ciudad Real, Spain., and Departamento de Química Inorgánica y Analítica, Universidad Rey Juan Carlos, 28933 Móstoles, Madrid, Spain
| | - Emilia Martínez-Caballero
- Departamento de Química Inorgánica, Orgánica y Bioquímica, Universidad de Castilla-La Mancha, 13071 Ciudad Real, Spain., and Departamento de Química Inorgánica y Analítica, Universidad Rey Juan Carlos, 28933 Móstoles, Madrid, Spain
| | - Juan Tejeda
- Departamento de Química Inorgánica, Orgánica y Bioquímica, Universidad de Castilla-La Mancha, 13071 Ciudad Real, Spain., and Departamento de Química Inorgánica y Analítica, Universidad Rey Juan Carlos, 28933 Móstoles, Madrid, Spain
| | - Luis F. Sánchez-Barba
- Departamento de Química Inorgánica, Orgánica y Bioquímica, Universidad de Castilla-La Mancha, 13071 Ciudad Real, Spain., and Departamento de Química Inorgánica y Analítica, Universidad Rey Juan Carlos, 28933 Móstoles, Madrid, Spain
| | - Carlos Alonso-Moreno
- Departamento de Química Inorgánica, Orgánica y Bioquímica, Universidad de Castilla-La Mancha, 13071 Ciudad Real, Spain., and Departamento de Química Inorgánica y Analítica, Universidad Rey Juan Carlos, 28933 Móstoles, Madrid, Spain
| | - Isabel López-Solera
- Departamento de Química Inorgánica, Orgánica y Bioquímica, Universidad de Castilla-La Mancha, 13071 Ciudad Real, Spain., and Departamento de Química Inorgánica y Analítica, Universidad Rey Juan Carlos, 28933 Móstoles, Madrid, Spain
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Lyashenko G, Herbst-Irmer R, Jancik V, Pal A, Mösch-Zanetti NC. Molybdenum oxo and imido complexes of beta-diketiminate ligands: synthesis and structural aspects. Inorg Chem 2008; 47:113-20. [PMID: 18072764 DOI: 10.1021/ic701534a] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Treatment of [MoO2(eta2-Pz)2] (Pz = 3,5-di-tert-butylpyrazolate) with the diketiminate ligand NacNacH (NacNac = CH[C(Me)NAr]2-, Ar = 2,6-Me2C6H3) at 55 degrees C leads under reduction of the metal to the formation of the dimeric molybdenum(V) compound [{MoO2(NacNac)}2] (1). The compound was characterized by spectroscopic means and by X-ray crystal structure analysis. The dimer consists of a [Mo2O4]2+ core with a short Mo-Mo bond (2.5591(5) A) and one coordinated diketiminate ligand on each metal atom. The reaction of [MoO2(eta2-Pz)2] with NacNacH in benzene at room temperature leads to a mixture of 1 and the monomeric molybdenum(VI) compound [MoO2(NacNac)(eta2-Pz)] (2). From such solutions, yellow crystals of 2 suitable for X-ray structural analysis were obtained revealing the coordination of one bidentate NacNac and one eta2-coordinate Pz ligand. This renders the two oxo groups inequivalent. Further high oxidation state molybdenum compounds containing the NacNac ligand were obtained by the reaction of [Mo(NAr)2Cl2(dme)] (Ar = 2,6-Me2C6H3) and [Mo(N-t-Bu)2Cl2(dme)] (dme = dimethoxyethane) with 1 equiv of the potassium salt NacNacK forming [Mo(NAr)2Cl(NacNac)] (3) and [Mo(N-t-Bu)2Cl(NacNac)] (4), respectively, in good yields. The X-ray structure analysis of 3 revealed a penta-coordinate compound where the geometry is best described as trigonal-bipyramidal.
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Affiliation(s)
- Ganna Lyashenko
- Institut für Chemie, Karl-Franzens-Universität Graz, Schubertstrasse 1, A-8010, Graz, Austria
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Mallouri R, Keramidas A, Brezesinski G, Leontidis E. Monolayer properties of surface-active metalorganic complexes with a tunable headgroup. J Colloid Interface Sci 2008; 317:544-55. [DOI: 10.1016/j.jcis.2007.09.058] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2007] [Revised: 09/19/2007] [Accepted: 09/20/2007] [Indexed: 11/16/2022]
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Burzlaff N. Tripodal N,N,O-ligands for metalloenzyme models and organometallics. ADVANCES IN INORGANIC CHEMISTRY 2008. [DOI: 10.1016/s0898-8838(08)00004-4] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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43
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Tran BL, Carrano CJ. Oxo−Molybdenum(VI,V,IV) Complexes of the Facially Coordinating Tris(mercaptoimidazolyl)borate Ligand: Synthesis, Characterization, and Oxygen Atom Transfer Reactivity. Inorg Chem 2007; 46:5429-38. [PMID: 17521186 DOI: 10.1021/ic7005259] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
A series of monooxo-Mo(IV,V) and dioxo-Mo(VI) complexes of the "soft" tripodal ligand, sodium tris(mercaptoimidazolyl)borate (NaTm(Me)), have been synthesized as potential oxygen atom transfer (OAT) models for sulfite oxidase. Complexes have been characterized by X-ray crystallography, cyclic voltammetry, and EPR, where appropriate. Oxygen atom transfer kinetics of Tm(Me)MoO(2)Cl, both stoichiometric and catalytic, have been studied by a combination of UV-vis and (31)P NMR spectroscopies under a variety of conditions. OAT rates are consistent with previously established relationships between redox potential/reactivity and mechanistic studies. The analysis of these complexes as potential structural and functional analogues of relevance to molybdoenzymes is further discussed.
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Affiliation(s)
- Ba L Tran
- Department of Chemistry and Biochemistry, San Diego State University, San Diego, California 92182-1030, USA
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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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45
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Gennari M, Tegoni M, Lanfranchi M, Pellinghelli MA, Marchio L. A New Chiral N,N‘,O-Donor Heteroscorpionate Ligand. Structures of Ni2+, Cu2+, Zn2+ Complexes and Study of Solution Equilibria by Means of 1H NMR/UV−Vis Titrations and EXSY NMR Spectroscopy. Inorg Chem 2007; 46:3367-77. [PMID: 17367129 DOI: 10.1021/ic062228e] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The N,N',O-heteroscorpionate ligand 1-(4-methoxy-3,5-dimethyl-pyridin-2-yl)-2-methyl-1-pyrazol-1-yl-propan-2-ol (LOH) was prepared in two high-yield steps. Complexes [M(LOH)2][MCl4] (M2+ = Cu2+ and Zn2+) and [M(LOH)2]Cl2 (M2+ = Ni2+ and Cu2+) were prepared and characterized by X-ray crystallography. The speciation in solution (methanol:water 95:5) of the M2+/LOH systems was investigated by means of spectrophotometric (Ni2+ and Cu2+) and 1H NMR (Zn2+) titrations. The beta1 and beta2 global formation constants for the [M(LOH)]2+ and [M(LOH)2]2+ species were obtained and are in agreement with the Irving-Williams series: Ni2+< Cu2+> Zn2+. The Zn2+/LOH system was studied by means of quantitative 1H-1H EXSY spectroscopy (300 K, mixing time = 0.2-0.8 s), which allows the description of the equilibria occurring between five octahedral [Zn(LOH)2]2+ structural isomers and tetrahedral [Zn(LOH)Cl]Cl species. Exchange constants kijex and associated rate constants kij suggest that two types of interconversion occur: octahedral-octahedral (faster) and octahedral-tetrahedral (slower). DFT calculations (B3LYP/6-311+G(d)) were employed to evaluate the relative stability of the [Zn(LOH)2]2+ isomers, which are comparable for the five complexes with a maximum energy difference of 6.3 kJ/mol.
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Affiliation(s)
- Marcello Gennari
- Dipartimento di Chimica Generale ed Inorganica, Chimica Analitica, Chimica Fisica, UniversitA degli Studi di Parma, via Usberti 17/a, I 43100 Parma, Italy
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46
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Fernandes AC, Romão CC. Silane/MoO2Cl2 as an efficient system for the reduction of esters. ACTA ACUST UNITED AC 2006. [DOI: 10.1016/j.molcata.2006.03.006] [Citation(s) in RCA: 94] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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47
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Hoffman JT, Carrano CJ. S versus O alkylation and coordination in zinc complexes containing the bulky heteroscorpionate alkoxy ligand bis(3,5-dimethylpyrazol-2-yl) diphenylmethanol. Inorganica Chim Acta 2006. [DOI: 10.1016/j.ica.2005.09.020] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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48
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Adhikari D, Zhao G, Basuli F, Tomaszewski J, Huffman JC, Mindiola DJ. Tl(I), Fe(II), and Co(II) Complexes Supported by a Monoanionic N,N,N‘-Heteroscorpionate Ligand Bis(3,5-di-tertbutylpyrazol-1-yl)-1-CH2NAr (Ar = 2,6-iPr2C6H3). Inorg Chem 2006; 45:1604-10. [PMID: 16471972 DOI: 10.1021/ic051704i] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The lithium salt (L)Li(THF) (L- = bis(3,5-di-tertbutylpyrazol-1-yl)-1-CH2NAr, Ar = 2,6-iPr2C6H3) can be readily prepared from lithium bis(3,5-di-tertbutylpyrazol-1-yl)methide and the N-methyleneaniline H2C=NAr. This N,N,N'-heteroscorpionate lithium reagent can be transmetalated with Tl(OTf), FeCl2(THF)(1.5), and CoCl2 to yield the (L)Tl, (L)FeCl, and (L)CoCl complexes, respectively. Single crystal structural data for compounds (L)Li(THF), (L)Tl, (L)FeCl, and (L)CoCl reveal in each case the hapticity of the sterically demanding, monoanionic L- ligand to be kappa3-N3.
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Affiliation(s)
- Debashis Adhikari
- Department of Chemistry and Molecular Structure Center, Indiana University, Bloomington, 47405, USA
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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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50
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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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