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Pessoa JC, Santos MF, Correia I, Sanna D, Sciortino G, Garribba E. Binding of vanadium ions and complexes to proteins and enzymes in aqueous solution. Coord Chem Rev 2021. [DOI: 10.1016/j.ccr.2021.214192] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
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2
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Artiukhin DG, Neugebauer J. Frozen-density embedding as a quasi-diabatization tool: Charge-localized states for spin-density calculations. J Chem Phys 2018; 148:214104. [DOI: 10.1063/1.5023290] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Affiliation(s)
- Denis G. Artiukhin
- Theoretische Organische Chemie, Organisch-Chemisches Institut and Center for Multiscale Theory and Simulation, Westfälische Wilhelms-Universität Münster, Corrensstraße 40, 48149 Münster, Germany
| | - Johannes Neugebauer
- Theoretische Organische Chemie, Organisch-Chemisches Institut and Center for Multiscale Theory and Simulation, Westfälische Wilhelms-Universität Münster, Corrensstraße 40, 48149 Münster, Germany
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3
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Sanna D, Pecoraro VL, Micera G, Garribba E. Application of DFT methods to the study of the coordination environment of the VO2+ ion in V proteins. J Biol Inorg Chem 2012; 17:773-90. [PMID: 22526563 DOI: 10.1007/s00775-012-0895-y] [Citation(s) in RCA: 41] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2011] [Accepted: 03/18/2012] [Indexed: 11/24/2022]
Abstract
Density functional theory (DFT) methods were used to simulate the environment of vanadium in several V proteins, such as vanadyl-substituted carboxypeptidase (sites A and B), vanadyl-substituted chloroplast F(1)-ATPase (CF(1); site 3), the reduced inactive form of vanadium bromoperoxidase (VBrPO; low- and high-pH sites), and vanadyl-substituted imidazole glycerol phosphate dehydratase (IGPD; sites α, β, and γ). Structural, electron paramagnetic resonance, and electron spin echo envelope modulation parameters were calculated and compared with the experimental values. All the simulations were performed in water within the framework of the polarizable continuum model. The angular dependence of [Formula: see text] and [Formula: see text] on the dihedral angle θ between the V=O and N-C bonds and on the angle φ between the V=O and V-N bonds, where N is the coordinated aromatic nitrogen atom, was also found. From the results it emerges that it is possible to model the active site of a vanadium protein through DFT methods and determine its structure through the comparison between the calculated and experimental spectroscopic parameters. The calculations confirm that the donor sets of sites B and A of vanadyl-substituted carboxypeptidase are [[Formula: see text], H(2)O, H(2)O, H(2)O] and [N(His)(||), N(His)(⊥), [Formula: see text], H(2)O], and that the donor set of site 3 of CF(1)-ATPase is [[Formula: see text], OH(Thr), H(2)O, H(2)O, [Formula: see text]]. For VBrPO, the coordination modes [N(His)(||), N(His)(∠), OH(Ser), H(2)O, H(2)O(ax)] for the low-pH site and [N(His)(||), N(His)(∠), OH(Ser), OH(-), H(2)O(ax)] or [N(His)(||), N(His)(∠), [Formula: see text], H(2)O] for the high-pH site, with an imidazole ring of histidine strongly displaced from the equatorial plane, can be proposed. Finally, for sites α, β, and γ of IGPD, the subsequent deprotonation of one, two, and three imidazole rings of histidine and the participation of a carboxylate group of a glutamate residue ([N(His)(||), [Formula: see text], H(2)O, H(2)O], [N(His)(||), N(His)(||), [Formula: see text], H(2)O], and [N(His)(||), N(His)(||), [Formula: see text], OH(-), [Formula: see text]], respectively) seems to be the most plausible hypothesis.
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Affiliation(s)
- Daniele Sanna
- Istituto CNR di Chimica Biomolecolare, Trav. La Crucca 3, 07040, Sassari, Italy
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Hyperfine and Quadrupolar Interactions in Vanadyl Proteins and Model Complexes: Theory and Experiment. METALS IN BIOLOGY 2010. [DOI: 10.1007/978-1-4419-1139-1_11] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/10/2023]
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Pisano L, Kiss D, Várnagy K, Sanna D, Micera G, Garribba E. Potentiometric, Spectroscopic and DFT Study of the V
IV
O Complexes Formed by Di(pyridin‐2‐yl) Ligands. Eur J Inorg Chem 2009. [DOI: 10.1002/ejic.200900045] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Luisa Pisano
- Department of Chemistry, University of Sassari, Via Vienna 2, 07100 Sassari, Italy, Fax: +39‐79‐212069
| | - Dóra Kiss
- Department of Inorganic and Analytical Chemistry, University of Debrecen, 4010 Debrecen, Hungary
| | - Katalin Várnagy
- Department of Inorganic and Analytical Chemistry, University of Debrecen, 4010 Debrecen, Hungary
| | - Daniele Sanna
- Istituto C.N.R. di Chimica Biomolecolare Trav. La Crucca 3, 07040 Li Punti, Sassari, Italy
| | - Giovanni Micera
- Department of Chemistry, University of Sassari, Via Vienna 2, 07100 Sassari, Italy, Fax: +39‐79‐212069
| | - Eugenio Garribba
- Department of Chemistry, University of Sassari, Via Vienna 2, 07100 Sassari, Italy, Fax: +39‐79‐212069
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Micera G, Pecoraro VL, Garribba E. Assessing the Dependence of 51V Az Value on the Aromatic Ring Orientation of VIVO2+ Pyridine Complexes. Inorg Chem 2009; 48:5790-6. [DOI: 10.1021/ic9001779] [Citation(s) in RCA: 58] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Giovanni Micera
- Dipartimento di Chimica, Università di Sassari, Via Vienna 2, I-07100 Sassari, Italy
| | - Vincent L. Pecoraro
- Department of Chemistry, University of Michigan, Ann Arbor, Michigan 48109-1055
| | - Eugenio Garribba
- Dipartimento di Chimica, Università di Sassari, Via Vienna 2, I-07100 Sassari, Italy
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Colaneri MJ, Vitali J, Peisach J. Aspects of structure and bonding in copper-amino acid complexes revealed by single-crystal EPR/ENDOR spectroscopy and density functional calculations. J Phys Chem A 2009; 113:5700-9. [PMID: 19378965 PMCID: PMC2896622 DOI: 10.1021/jp811249s] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
This work deduces from a series of well-defined copper-doped amino acid crystals, relationships between structural features of the copper complexes, and ligand-bound proton hyperfine parameters. These were established by combining results from electron paramagnetic resonance (EPR)/electron-nuclear double resonance (ENDOR) studies, crystallography, and were further assessed by quantum mechanical (QM) calculations. A detailed evaluation of previous studies on Cu(2+) doped into alpha-glycine, triglycine sulfate, alpha-glycylglycine, and L-alanine crystals reveal correlations between geometric features of the copper sites and proton hyperfine couplings from amino-bound and carbon-bound hydrogens. Experimental variations in proton isotropic hyperfine coupling values (a(iso)) could be fit to cosine-square dependences on dihedral angles, namely, for C(alpha)-bound hydrogens, a(iso) = -1.09 + 8.21 cos(2) theta MHz, and for amino hydrogens, a(iso) = -6.16 + 4.15 cos(2) phi MHz. For the C(alpha) hydrogens, this dependency suggests a hyperconjugative-like mechanism for transfer of spin density into the hydrogen 1s orbital. In the course of this work, it was also necessary to reanalyze the ENDOR measurements from Cu(2+)-doped alpha-glycine because the initial study determined the (14)N coupling parameters without holding its nuclear quadrupole tensor traceless. This new treatment of the data was needed to correctly align the (14)N hyperfine tensor principal directions in the molecular complex. To provide a theoretical basis for the coupling variations, QM calculations performed at the DFT level were used to compute the proton hyperfine tensors in the four crystal complexes as well as in a geometry-optimized Cu(2+)(glycine)(2) model. These theoretical calculations confirmed systematic changes in couplings with dihedral angles but greatly overestimated the experimental geometric sensitivity to the amino hydrogen isotropic coupling.
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Affiliation(s)
- Michael J. Colaneri
- Department of Chemistry and Physics, State University of New York at Old Westbury, Old Westbury, New York 11568
| | - Jacqueline Vitali
- Department of Physics, Cleveland State University, Euclid Avenue and East 24 Street, Cleveland, Ohio, 44115
| | - Jack Peisach
- Department of Physiology and Biophysics, Albert Einstein College of Medicine, 1300 Morris Park Avenue, Bronx, New York 10461
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Lodyga-Chruscinska E, Sanna D, Garribba E, Micera G. Potentiometric, spectroscopic, electrochemical and DFT characterization of oxovanadium(IV) complexes formed by citrate and tartrates in aqueous solution at high ligand to metal molar ratios: the effects of the trigonal bipyramidal distortion in bis-chelated species and biological implications. Dalton Trans 2008:4903-16. [PMID: 18766223 DOI: 10.1039/b803520b] [Citation(s) in RCA: 48] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The complexation of VO(IV) ion with citrate (L3-), D-, L- and DL-tartrate (L2-) at high ligand to metal molar ratios was studied in aqueous solution through the combined application of potentiometric, spectroscopic (UV-vis and EPR) and electrochemical (cyclic voltammetry) techniques. Unlike in equimolar solution, mononuclear and not dinuclear species are formed with the binding of carboxylate-COO- and alcoholate-O- donors yielding mono- and bis-chelated species with VOLH, VOL, VOLH(-1) and VOL2H(-2) composition; for tartrates also the "sugar-like" (O-, O-) coordination is involved in the vanadium binding at basic pH values giving rise to the formation of VOL2H(-3) and VOL2H(-4) complexes. Among the species formed, VOL2H(-2) is characterised by a strong distortion towards the trigonal bipyramid with the two V-O(alcoholate) bonds in the equatorial and the two V-O(carboxylate) bonds in the axial positions. The geometry and electronic absorption spectra of such complexes were simulated by DFT methods and it was found that in aqueous solution the distortion follows the steric hindrance of the substituents on the alpha-carbon atom and the hydrophobicity of the ligands. The results were compared with those displayed by simple alpha-hydroxycarboxylates (glycolate, 2-hydroxyisobutyrate, 2-ethyl-2-hydroxybutyrate and benzilate). The trigonal bipyramidal distortion was correlated with the values of: i) Deltalambda = lambda2-lambda3, where lambda2 and lambda3 are the central bands in the electronic absorption spectrum; ii) |A(x)-A(y)|, where A(x) and A(y) are the 51V hyperfine coupling constants along the x and y axes in the anisotropic EPR spectrum; iii) the half-wave potential E(1/2) of oxidation of VO(IV) to the corresponding VO2(V) species in the cyclic voltammogram. Finally, a discussion on the possible form of VO(IV)-citrate complexes in blood serum is presented, where it is found that the most relevant species under physiological conditions should be [VO(citrH(-1))]2-.
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Affiliation(s)
- Elzbieta Lodyga-Chruscinska
- Institute of General Food Chemistry, Technical University of Lodz, ul. Stefanowskiego 4/10, PL-90924, Lodz, Poland
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Colombo MC, Vandevondele J, Van Doorslaer S, Laio A, Guidoni L, Rothlisberger U. Copper binding sites in the C-terminal domain of mouse prion protein: A hybrid (QM/MM) molecular dynamics study. Proteins 2008; 70:1084-98. [PMID: 17876822 DOI: 10.1002/prot.21604] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Abstract
We present a hybrid QM/MM Car-Parrinello molecular dynamics study of the copper-loaded C-terminal domain of the mouse prion protein. By means of a statistical analysis of copper coordination in known protein structures, we localized the protein regions with the highest propensity for copper ion binding. The identified candidate structures were subsequently refined via QM/MM simulations. Their EPR characteristics were computed to make contact with the experimental data and to probe the sensitivity to structural and chemical changes. Overall best agreement with the experimental EPR data (Van Doorslaer et al., J Phys Chem B 2001; 105: 1631-1639) and the information currently available in the literature is observed for a binding site involving H187. Moreover, a reinterpretation of the experimental proton hyperfine couplings was possible in the light of the present computational findings.
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Affiliation(s)
- Maria Carola Colombo
- Laboratory of Computational Chemistry and Biochemistry, Institute of Chemical Sciences and Engineering, EPFL, CH-1015 Lausanne, Switzerland
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Várnagy K, Csorba T, Kiss D, Garribba E, Micera G, Sanna D. VIVO Complexes of Bis(imidazol-2-yl) Derivatives: A Potentiometric, Spectroscopic and DFT Study. Eur J Inorg Chem 2007. [DOI: 10.1002/ejic.200700502] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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Maurya MR, Kumar A, Ebel M, Rehder D. Synthesis, Characterization, Reactivity, and Catalytic Potential of Model Vanadium(IV, V) Complexes with Benzimidazole-Derived ONN Donor Ligands. Inorg Chem 2006; 45:5924-37. [PMID: 16841997 DOI: 10.1021/ic0604922] [Citation(s) in RCA: 120] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Reaction between [VO(acac)(2)] and the ONN donor Schiff base Hsal-ambmz (I) (Hsal-ambmz = Schiff base obtained by the condensation of salicylaldehyde and 2-aminomethylbenzimidazole) resulted in the formation of the complexes [V(IV)O(acac)(sal-ambmz)] (1), [V(V)O(2)(acac-ambmz)] (2) (Hacac-ambmz = Schiff base derived from acetylacetone and 2-aminomethylbenzimidazole), and the known complex [V(IV)O(sal-phen)] (3) (H(2)sal-phen = Schiff base derived from salicylaldehyde and o-phenylenediamine). Similarly, [V(IV)O(acac)(sal-aebmz)] (7) has been isolated from the reaction with Hsal-aebmz (II) (Hsal-aebmz derived from salicylaldehyde and 2-aminoethylbenzimidazole). Aerial oxidation of the methanolic solutions/suspensions of 1 and 7 yielded the dioxovanadium(V) complexes [V(V)O(2)(sal-ambmz)] (4) and [V(V)O(2)(sal-aebmz)] (8), respectively. Reaction of VOSO(4) with II gave [{V(IV)O(sal-aebmz)}(2)SO(4)] (9) and [V(IV)O(sal-aebmz)(2)] (10), along with 3 and 8. Under similar reaction conditions, I gave only [{V(IV)O(sal-ambmz)}(2)SO(4)] (5) and 3 as major products. Treatment of 1 and 7 with benzohydroxamic acid (Hbha) yielded the mixed-chelate complexes [V(V)O(bha)(sal-ambmz)] (6) and [V(V)O(bha)(sal-aebmz)] (11). The crystal and molecular structures of 2, 3.1/2DMF, 7.1/4H(2)O, 8, 9.2H(2)O, 10, and 11 have been determined, confirming the ONN binding mode of the ligands. In complex 10, one of the ligands is coordinated through the azomethine nitrogen and phenolate oxygen only, leaving the benzimidazole group free. In the dinuclear complex 9, bridging functions are the phenolate oxygens from both of the ligands and two oxygens of the sulfato group. The unstable oxoperoxovanadium(V) complex [V(V)O(O(2))(sal-aebmz)] (12) has been prepared by treatment of 7 with aqueous H(2)O(2). Acidification of methanolic solutions of 7 and 10 lead to (reversible) protonation of the bemzimidazole, while 8 was converted to an oxo-hydroxo species. Complexes 2, 4, and 8 catalyze the oxidation of methyl phenyl sulfide to methyl phenyl sulfoxide and methyl phenyl sulfone, a reaction mimicking the sulfideperoxidase activity of vanadate-dependent haloperoxidases. These complexes are also catalytically active in the oxidation of styrene to styrene oxide, benzaldehyde, benzoic acid, and 1-phenylethane-1,2-diol.
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Affiliation(s)
- Mannar R Maurya
- Department of Chemistry, Indian Institute of Technology Roorkee, Roorkee 247 667, India.
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12
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13
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Woodworth J, Bowman MK, Larsen SC. Two-Dimensional Pulsed EPR Studies of Vanadium-Exchanged ZSM-5. J Phys Chem B 2004. [DOI: 10.1021/jp046585r] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- James Woodworth
- Department of Chemistry, University of Iowa, Iowa City, Iowa 52242, and Environmental Molecular Sciences Laboratory, Pacific Northwest National Laboratory, Richland, Washington 99352
| | - Michael K. Bowman
- Department of Chemistry, University of Iowa, Iowa City, Iowa 52242, and Environmental Molecular Sciences Laboratory, Pacific Northwest National Laboratory, Richland, Washington 99352
| | - Sarah C. Larsen
- Department of Chemistry, University of Iowa, Iowa City, Iowa 52242, and Environmental Molecular Sciences Laboratory, Pacific Northwest National Laboratory, Richland, Washington 99352
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Aznar CP, Deligiannakis Y, Tolis EJ, Kabanos T, Brynda M, Britt RD. ESE-ENDOR Study and DFT Calculations on Oxovanadium Compounds: Effect of Axial Anionic Ligands on the 51V Nuclear Quadrupolar Coupling Constant. J Phys Chem A 2004. [DOI: 10.1021/jp037560f] [Citation(s) in RCA: 36] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Constantino P. Aznar
- Department of Chemistry, University of California, Davis, California, 95616, Department of Environmental and Natural Resources Management, Laboratory of Physical Chemistry, University of Ioannina, Pyllinis 9, 30100 Agrinio, Greece, and Department of Chemistry, Section of Inorganic and Analytical Chemistry, University of Ioannina, 451 10 Ioannina, Greece
| | - Yiannis Deligiannakis
- Department of Chemistry, University of California, Davis, California, 95616, Department of Environmental and Natural Resources Management, Laboratory of Physical Chemistry, University of Ioannina, Pyllinis 9, 30100 Agrinio, Greece, and Department of Chemistry, Section of Inorganic and Analytical Chemistry, University of Ioannina, 451 10 Ioannina, Greece
| | - Evangelos J. Tolis
- Department of Chemistry, University of California, Davis, California, 95616, Department of Environmental and Natural Resources Management, Laboratory of Physical Chemistry, University of Ioannina, Pyllinis 9, 30100 Agrinio, Greece, and Department of Chemistry, Section of Inorganic and Analytical Chemistry, University of Ioannina, 451 10 Ioannina, Greece
| | - Themistoklis Kabanos
- Department of Chemistry, University of California, Davis, California, 95616, Department of Environmental and Natural Resources Management, Laboratory of Physical Chemistry, University of Ioannina, Pyllinis 9, 30100 Agrinio, Greece, and Department of Chemistry, Section of Inorganic and Analytical Chemistry, University of Ioannina, 451 10 Ioannina, Greece
| | - Marcin Brynda
- Department of Chemistry, University of California, Davis, California, 95616, Department of Environmental and Natural Resources Management, Laboratory of Physical Chemistry, University of Ioannina, Pyllinis 9, 30100 Agrinio, Greece, and Department of Chemistry, Section of Inorganic and Analytical Chemistry, University of Ioannina, 451 10 Ioannina, Greece
| | - R. David Britt
- Department of Chemistry, University of California, Davis, California, 95616, Department of Environmental and Natural Resources Management, Laboratory of Physical Chemistry, University of Ioannina, Pyllinis 9, 30100 Agrinio, Greece, and Department of Chemistry, Section of Inorganic and Analytical Chemistry, University of Ioannina, 451 10 Ioannina, Greece
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Bühl M, Schurhammer R, Imhof P. Peroxovanadate Imidazole Complexes as Catalysts for Olefin Epoxidation: Density Functional Study of Dynamics, 51V NMR Chemical Shifts, and Mechanism. J Am Chem Soc 2004; 126:3310-20. [PMID: 15012162 DOI: 10.1021/ja039436f] [Citation(s) in RCA: 58] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
A density functional study of [VO(O(2))(2)(Im)](-) (1, Im = imidazole) is presented, calling special attention to effects of dynamics and solvation on the (51)V chemical shift. According to Car-Parrinello molecular dynamics simulations, rotation of the Im ligand can be fast in the gas phase, but is more hindered in aqueous solution. In the latter, bonding between Im and V is reinforced, and dynamic averaging of GIAO-B3LYP magnetic shieldings affords a gas-to-liquid shift of ca. -100 ppm for delta((51)V). A complete catalytic cycle has been characterized for olefin epoxidation mediated by 1, using H(2)O(2) as oxidant. The rate-determining step is indicated to be initial oxygen atom transfer from 1 to the substrate via a spiro-like transition state. Substituent effects on this barrier are examined, and a significant decrease (by 2-6 kcal/mol) is revealed upon removal of the Im proton or upon complexation with a H-bond acceptor. Implications for the mechanism of the oxidative chemistry of vanadium-dependent haloperoxidases and requirements for prospective biomimetic analogues are discussed.
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Affiliation(s)
- Michael Bühl
- Max-Planck-Institut für Kohlenforschung, Kaiser-Wilhelm-Platz 1, D-45470 Mülheim an der Ruhr, Germany.
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Fritscher J. Influence of hydrogen bond geometry on quadrupole coupling parameters: A theoretical study of imidazole–water and imidazole–semiquinone complexes. Phys Chem Chem Phys 2004. [DOI: 10.1039/b408764j] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
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17
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Saladino AC, Larsen SC. Relativistic DFT Calculations of Copper Hyperfine Coupling Constants: Effect of Spin−Orbit Coupling. J Phys Chem A 2003. [DOI: 10.1021/jp022671k] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
| | - Sarah C. Larsen
- Department of Chemistry, University of Iowa, Iowa City, Iowa 52242
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Saladino AC, Larsen SC. Density Functional Theory Calculations of Nitrogen Hyperfine and Quadrupole Coupling Constants in Oxovanadium(IV) Complexes. J Phys Chem A 2003. [DOI: 10.1021/jp030051t] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
| | - Sarah C. Larsen
- Department of Chemistry, University of Iowa, Iowa City, Iowa 52242
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Saladino AC, Larsen SC. Density Functional Theory Calculations of the Electron Paramagnetic Resonance Parameters for VO2+ Complexes. J Phys Chem A 2003. [DOI: 10.1021/jp022297o] [Citation(s) in RCA: 57] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
| | - Sarah C. Larsen
- Department of Chemistry, University of Iowa, Iowa City, Iowa 52242
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