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Jana NC, Jagličić Z, Brandão P, Adak S, Saha A, Panja A. A novel triple aqua-, phenoxo- and carboxylato-bridged dinickel( ii) complex, its magnetic properties, and comparative biomimetic catalytic studies with analogous dinickel( ii) complexes. NEW J CHEM 2021. [DOI: 10.1039/d1nj00708d] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Abstract
A unique triply bridged dinickel(ii) complex and two doubly bridged dinickel(ii) complexes are reported, and their magnetic properties and comparative biomimetic catalytic performances are studied.
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Affiliation(s)
- Narayan Ch. Jana
- Department of Chemistry
- Panskura Banamali College
- Panskura RS
- India
| | - Zvonko Jagličić
- Institute of Mathematics
- Physics and Mechanics & Faculty of Civil and Geodetic Engineering
- University of Ljubljana
- 1000 Ljubljana
- Slovenia
| | - Paula Brandão
- Department of Chemistry
- CICECO-Aveiro Institute of Materials
- University of Aveiro
- 3810-193 Aveiro
- Portugal
| | - Sarmistha Adak
- Department of Chemistry
- Panskura Banamali College
- Panskura RS
- India
- Department of Chemistry
| | - Amrita Saha
- Department of Chemistry
- Jadavpur University
- Kolkata-700032
- India
| | - Anangamohan Panja
- Department of Chemistry
- Panskura Banamali College
- Panskura RS
- India
- Department of Chemistry
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3
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Mubarak MQE, de Visser SP. Reactivity patterns of vanadium(iv/v)-oxo complexes with olefins in the presence of peroxides: a computational study. Dalton Trans 2019; 48:16899-16910. [PMID: 31670737 DOI: 10.1039/c9dt03048d] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
Vanadium porphyrin complexes are naturally occurring substances found in crude oil and have been shown to have medicinal properties as well. Little is known on their activities with substrates; therefore, we decided to perform a detailed density functional theory study on the properties and reactivities of vanadium(iv)- and vanadium(v)-oxo complexes with a TPPCl8 or 2,3,7,8,12,13,17,18-octachloro-meso-tetraphenylporphyrinato ligand system. In particular, we investigated the reactivity of [VV(O)(TPPCl8)]+ and [VIV(O)(TPPCl8)] with cyclohexene in the presence of H2O2 or HCO4-. The work shows that vanadium(iv)-oxo and vanadium(v)-oxo are sluggish oxidants by themselves and react with olefins slowly. However, in the presence of hydrogen peroxide, these metal-oxo species can be transformed into a side-on vanadium-peroxo complex, which reacts with substrates more efficiently. Particularly with anionic axial ligands, the side-on vanadium-peroxo and vanadium-oxo complexes produced epoxides from cyclohexene via small barrier heights. In addition to olefin epoxidation, we investigated aliphatic hydroxylation mechanisms by the same oxidants and some oxidants show efficient and viable cyclohexene hydroxylation mechanisms. The work implies that vanadium-oxo and vanadium-peroxo complexes can react with double bonds through epoxidation, and under certain conditions also undergo hydroxylation, but the overall reactivity is highly dependent on the equatorial ligand, the local environment and the presence or absence of anionic axial ligands.
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Affiliation(s)
- M Qadri E Mubarak
- The Manchester Institute of Biotechnology and Department of Chemical Engineering and Analytical Science, The University of Manchester, 131 Princess Street, Manchester M1 7DN, UK.
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Mubarak MQE, de Visser SP. Second-Coordination Sphere Effect on the Reactivity of Vanadium–Peroxo Complexes: A Computational Study. Inorg Chem 2019; 58:15741-15750. [DOI: 10.1021/acs.inorgchem.9b01778] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- M. Qadri E. Mubarak
- Manchester Institute of Biotechnology and Department of Chemical Engineering and Analytical Science, The University of Manchester, 131 Princess Street, Manchester M1 7DN, United Kingdom
| | - Sam P. de Visser
- Manchester Institute of Biotechnology and Department of Chemical Engineering and Analytical Science, The University of Manchester, 131 Princess Street, Manchester M1 7DN, United Kingdom
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Massoud SS, Ledet CC, Junk T, Bosch S, Comba P, Herchel R, Hošek J, Trávníček Z, Fischer RC, Mautner FA. Dinuclear metal(ii)-acetato complexes based on bicompartmental 4-chlorophenolate: syntheses, structures, magnetic properties, DNA interactions and phosphodiester hydrolysis. Dalton Trans 2018; 45:12933-50. [PMID: 27479361 DOI: 10.1039/c6dt02596j] [Citation(s) in RCA: 36] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
Abstract
A series of dinuclear metal(ii)-acetato complexes: [Ni2(μ-L(Cl)O)(μ2-OAc)2](PF6)·3H2O (1), [Ni2(μ-L(Cl)O)(μ2-OAc)2](ClO4)·CH3COCH3 (2), [Cu2(μ-L(Cl)O)(μ2-OAc)(ClO4)](ClO4) (3), [Cu2(μ-L(Cl)O)(OAc)2](PF6)·H2O (4), [Zn2(μ-L(Cl)O)(μ2-OAc)2](PF6) (5) and [Mn2(L(Cl)-O)(μ2-OAc)2](ClO4)·H2O (6), where L(Cl)O(-) = 2,6-bis[bis(2-pyridylmethyl)aminomethyl]-4-chlorophenolate, were synthesized. The complexes were structurally characterized by spectroscopic techniques and single crystal X-ray crystallography. Six-coordinate geometries with doubly bridged acetato ligands were found in Ni(ii), Zn(ii) and Mn(ii) complexes 1, 2, 5 and 6, whereas with Cu(ii) complexes a five-coordinate species was obtained with 4, and mixed five- and six-coordinate geometries with a doubly bridged dimetal core were observed in 3. The magnetic properties of complexes 1-4 and 6 were studied at variable temperatures and revealed weak to very weak antiferromagnetic interactions in 1, 2, 4 and 6 (J = -0.55 to -9.4 cm(-1)) and ferromagnetic coupling in 3 (J = 15.4 cm(-1)). These results are consistent with DFT calculations performed at the B3LYP/def2-TZVP(-f) level of theory. Under physiological conditions, the interaction of the dinculear complexes 1-5 with supercoiled plasmid ds-DNA did not show any pronounced nuclease activity, but Ni(ii) complexes 1 and 2 revealed a strong ability to unwind the supercoiled conformation of ds-DNA. The mechanistic studies performed on the interaction of the Ni(ii) complexes with DNA demonstrated the important impact of the nickel(ii) ion in the unwinding process. In combination with the DNA study, the phosphatase activity of complexes 1, 3, and 5 was examined by the phosphodiester hydrolysis of bis(2,4-dinitrophenol)phosphate (BDNPP) in the pH range of 5.5-10.5 at 25 °C. The Michaelis-Menten kinetics performed at pH 7 and 10.7 showed that catalytic efficiencies kcat/KM (kcat = catalytic rate constant, KM = substrate binding constant) decrease in the order: Ni(ii), 1 > Zn(ii), 5 > Cu(ii), 3. A similar trend was also observed with the turnover numbers at pH = 7. The results are discussed in relation to the coordination geometry and nature of the metal center as well as the steric environment imposed by the compartmental phenoxido ligand.
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Affiliation(s)
- Salah S Massoud
- Department of Chemistry, University of Louisiana at Lafayette, Lafayette, LA 70504, USA.
| | - Catherine C Ledet
- Department of Chemistry, University of Louisiana at Lafayette, Lafayette, LA 70504, USA.
| | - Thomas Junk
- Department of Chemistry, University of Louisiana at Lafayette, Lafayette, LA 70504, USA.
| | - Simone Bosch
- Anorganisch-Chemisches Institut and Interdisziplinäres Zentrum für Wissenschaftliches Rechnen (IWR), Universität Heidelberg, Im Neuenheimer Feld 270, 69120 Heidelberg, Germany.
| | - Peter Comba
- Anorganisch-Chemisches Institut and Interdisziplinäres Zentrum für Wissenschaftliches Rechnen (IWR), Universität Heidelberg, Im Neuenheimer Feld 270, 69120 Heidelberg, Germany.
| | - Radovan Herchel
- Department of Inorganic Chemistry & Regional Centre of Advanced Technologies and Materials, Faculty of Science, Palacký University, 17. listopadu 12, CZ-77146 Olomouc, Czech Republic.
| | - Jan Hošek
- Department of Inorganic Chemistry & Regional Centre of Advanced Technologies and Materials, Faculty of Science, Palacký University, 17. listopadu 12, CZ-77146 Olomouc, Czech Republic.
| | - Zdeněk Trávníček
- Department of Inorganic Chemistry & Regional Centre of Advanced Technologies and Materials, Faculty of Science, Palacký University, 17. listopadu 12, CZ-77146 Olomouc, Czech Republic.
| | - Roland C Fischer
- Institut für Anorganische Chemische, Technische Universität Graz, Stremayrgasse 9/V, A-8010 Graz, Austria
| | - Franz A Mautner
- Institut für Physikalische and Theoretische Chemie, Technische Universität Graz, Stremayrgasse 9/II, A-8010, Graz, Austria.
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Massoud SS, Junk T, Louka FR, Herchel R, Trávníček Z, Fischer RC, Mautner FA. Synthesis, structure and magnetic characterization of dinuclear copper(ii) complexes bridged by bicompartmental phenolate. RSC Adv 2015. [DOI: 10.1039/c5ra19358c] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Two series of bridged-phenoxido dinuclear Cu(ii) complexes were structurally and magnetically characterized: [Cu2(μ-LCl-O)(μ-X)](ClO4)2 (X = OH−, C3H3N2−, O2P(OC6H5)2−) and [Cu2(μ-LR-O)(X)2]PF6·2CH3CN (R = Cl, CH3 and X = dca) complexes.
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Affiliation(s)
- Salah S. Massoud
- Department of Chemistry
- University of Louisiana at Lafayette
- Lafayette
- USA
| | - Thomas Junk
- Department of Chemistry
- University of Louisiana at Lafayette
- Lafayette
- USA
| | - Febee R. Louka
- Department of Chemistry
- University of Louisiana at Lafayette
- Lafayette
- USA
| | - Radovan Herchel
- Department of Inorganic Chemistry & Regional Centre of Advanced Technologies and Materials
- Faculty of Science
- Palacký University
- CZ-77146 Olomouc
- Czech Republic
| | - Zdeněk Trávníček
- Department of Inorganic Chemistry & Regional Centre of Advanced Technologies and Materials
- Faculty of Science
- Palacký University
- CZ-77146 Olomouc
- Czech Republic
| | - Roland C. Fischer
- Institut für Anorganische Chemische
- Technische Universität Graz
- A-8010 Graz
- Austria
| | - Franz A. Mautner
- Institut für Physikalische and Theoretische Chemie
- Technische Universität Graz
- Graz
- Austria
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Massoud SS, Spell M, Ledet CC, Junk T, Herchel R, Fischer RC, Trávníček Z, Mautner FA. Magnetic and structural properties of dinuclear singly bridged-phenoxido metal(ii) complexes. Dalton Trans 2015; 44:2110-21. [DOI: 10.1039/c4dt03508a] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
Five new dinuclear bridged-phenoxido dichlorido-metal(ii) complexes [M2(μ-LClO)(X)2Cl2]PF6/ClO4 complexes, where M(ii) = Co, Ni, Cu (1–4) and Zn (5); X = CH3OH, H2O or 0 were synthesized and structurally characterized. Complexes 1–4 revealed weak to moderate antiferromagnetic coupling.
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Affiliation(s)
- Salah S. Massoud
- Department of Chemistry
- University of Louisiana at Lafayette
- Lafayette
- USA
| | - Mark Spell
- Department of Chemistry
- University of Louisiana at Lafayette
- Lafayette
- USA
| | | | - Thomas Junk
- Department of Chemistry
- University of Louisiana at Lafayette
- Lafayette
- USA
| | - Radovan Herchel
- Department of Inorganic Chemistry & Regional Centre of Advanced Technologies and Materials
- Faculty of Science
- Palacký University
- CZ-77146 Olomouc
- Czech Republic
| | - Roland C. Fischer
- Institut für Anorganische Chemische
- Technische Universität Graz
- A-8010 Graz
- Austria
| | - Zdeněk Trávníček
- Department of Inorganic Chemistry & Regional Centre of Advanced Technologies and Materials
- Faculty of Science
- Palacký University
- CZ-77146 Olomouc
- Czech Republic
| | - Franz A. Mautner
- Institut für Physikalische and Theoretische Chemie
- Technische Universität Graz
- Graz
- Austria
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Ostad SN, Emadi SM, Tavajohi S, Amani V, Abedi A. Oxovanadium(IV) Compounds of cis-[VOCl(N-N)2]+(N-N = 4,4'- and 5,5'-dimethyl-2,2'-bipyridine); Crystal Structure and Biological Activity. B KOREAN CHEM SOC 2012. [DOI: 10.5012/bkcs.2012.33.11.3891] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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Wichmann O, Sopo H, Lehtonen A, Sillanpää R. Oxidovanadium(V) Complexes with Aminoethanol Bis(phenolate) [O,N,O,O′] Ligands: Preparations, Structures, N-Dealkylation and Condensation Reactions. Eur J Inorg Chem 2011. [DOI: 10.1002/ejic.201001251] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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Vad MS, Nielsen A, Lennartson A, Bond AD, McGrady JE, McKenzie CJ. Switching on oxygen activation by cobalt complexes of pentadentate ligands. Dalton Trans 2011; 40:10698-707. [DOI: 10.1039/c1dt10594a] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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Tabeya T, Abe M, Sasaki Y. Mixed Re VII–Fe IIIand Re VII–Cu IIComplexes Prepared by the Use of the Complex Ligand [Re(O) 3(tpenH-κ 3N, N″, N″′)] 2+(tpen = N, N, N′, N′-Tetrakis(2-pyridylmethyl)ethylenediamine). BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN 2006. [DOI: 10.1246/bcsj.79.1398] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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