1
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Xie Y, Miao Q, Deng W, Lu Y, Yang Y, Chen X, Liao RZ, Ye S, Tung CH, Wang W. Facile Transformations of a Binuclear Cp*Co(II) Diamidonaphthalene Complex to Mixed-Valent Co(II)Co(III), Co(III)(μ-H)Co(III), and Co(III)(μ-OH)Co(III) Derivatives. Inorg Chem 2022; 61:2204-2210. [PMID: 35049285 DOI: 10.1021/acs.inorgchem.1c03451] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Abstract
A diamido-bridged dicobalt complex supported by a diamidonaphthalene ligand, Cp*2Co2(μ-1,8-C10H8(NH)2) (1), was synthesized, and the reactivity relevant to redox transformations of the Co2N2 core was investigated. It was found that the Co(II)-Co(II) bond allows for protonation by [HPPh3][BF4] resulting in a bridging hydride, [1H]+, with pKa ∼ 7.6 in CH2Cl2. The diamidonaphthalene ligand can stabilize the binuclear system in the Co(II)Co(III) mixed-valent state (1+), which is capable of binding CO to afford [1-CO]+. Surprisingly, the mixed-valent complex also activates H2O to furnish a Co(III)Co(III) hydroxy complex [1-OH]+ accompanied by release of H2. The hydroxy ligand in [1-OH]+ is exchangeable, as demonstrated by 18O-labeling experiments on [1-OH]+ with H218O that led to the heavier isotopolog [1-18OH]+.
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Affiliation(s)
- Yufang Xie
- School of Chemistry and Chemical Engineering, Shandong University, Jinan 250100, China
| | - Qiyi Miao
- State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China
| | - Wenhao Deng
- School of Chemistry and Chemical Engineering, Huazhong University of Science and Technology, Wuhan 430074, China
| | - Yilei Lu
- School of Chemistry and Chemical Engineering, Shandong University, Jinan 250100, China
| | - Yinuo Yang
- School of Chemistry and Chemical Engineering, Shandong University, Jinan 250100, China
| | - Xiaohui Chen
- School of Chemistry and Chemical Engineering, Shandong University, Jinan 250100, China
| | - Rong-Zhen Liao
- School of Chemistry and Chemical Engineering, Huazhong University of Science and Technology, Wuhan 430074, China
| | - Shengfa Ye
- State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China
| | - Chen-Ho Tung
- School of Chemistry and Chemical Engineering, Shandong University, Jinan 250100, China
| | - Wenguang Wang
- School of Chemistry and Chemical Engineering, Shandong University, Jinan 250100, China.,College of Chemistry, Beijing Normal University, Beijing 100875, China
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2
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Hamdi I, Mhadhbi N, Issaoui N, Roodt A, Turnbull MM, Naϊli H. Design, synthesis and physico-chemical studies of a Co(II)/Co(III) mixed-valence complex: An experimental and DFT approach. J Mol Struct 2021. [DOI: 10.1016/j.molstruc.2021.130384] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
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3
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He X, Wang Y, Yuan D, You H, Yao Y. Synthesis, Characterization, and Catalytic Study of Amine-Bridged Bis(phenolato) Co(II) and Co(II/III)-M(I) Complexes (M = K or Na). Inorg Chem 2021; 60:11521-11529. [PMID: 34281344 DOI: 10.1021/acs.inorgchem.1c01542] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Co(II) complexes 1-3 bearing amine-bridged bis(phenolato) complexes have been synthesized through reactions of bis(phenols) with CoCl2 or Co(OAc)2. Oxidation of the Co(II) complex with air resulted in partial oxidation, generating mixed valence Co(II/III) complexes 4 and 5. In addition, due to the presence of alkali compounds (KOAc and NaOMe), 4 and 5 formed as Co-alkali metal heterometallic complexes, which are the first example of mixed valence Co(II/III)-M(I) (M = K or Na) complexes. Complexes 1-5 showed good activity in the cycloaddition of epoxides and CO2 under atmospheric pressure, generating cyclic carbonates in 40-99% yields. Co(II/III)-Na(I) complex 5 performed better in reactions of bulkier substrates, underlining the enhanced activity of mixed valence Co-alkali metal heterometallic complexes. On the contrary, complex 5 showed limited activity in copolymerization of epoxide and CO2.
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Affiliation(s)
- Xinyi He
- Key Laboratory of Organic Synthesis of Jiangsu Province, College of Chemistry, Chemical Engineering and Materials Science, Dushu Lake Campus, Soochow University, Suzhou 215123, People's Republic of China
| | - Yanwei Wang
- Key Laboratory of Organic Synthesis of Jiangsu Province, College of Chemistry, Chemical Engineering and Materials Science, Dushu Lake Campus, Soochow University, Suzhou 215123, People's Republic of China
| | - Dan Yuan
- Key Laboratory of Organic Synthesis of Jiangsu Province, College of Chemistry, Chemical Engineering and Materials Science, Dushu Lake Campus, Soochow University, Suzhou 215123, People's Republic of China
| | - Hongpeng You
- State Key Laboratory of Rare Earth Resource Utilization, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, People's Republic of China
| | - Yingming Yao
- Key Laboratory of Organic Synthesis of Jiangsu Province, College of Chemistry, Chemical Engineering and Materials Science, Dushu Lake Campus, Soochow University, Suzhou 215123, People's Republic of China
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4
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Majumder A, Dutta N, Haldar S, Das A, Carrella L, Bera M. Aromatic dicarboxylate incorporated new di- and tetranuclear cobalt(II) complexes: Synthetic and structural aspects, and evaluation of properties and catalytic activity. Inorganica Chim Acta 2020. [DOI: 10.1016/j.ica.2020.119752] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
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5
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Padhi SK, Rai S, Akhter SS. Redox-Induced Structural Switching through Sporadic Pyridine-Bridged CoIICoII Dimer and Electrocatalytic Proton Reduction. Inorg Chem 2020; 59:7810-7821. [DOI: 10.1021/acs.inorgchem.0c00911] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Affiliation(s)
- Sumanta Kumar Padhi
- Artificial Photosynthesis Laboratory, Department of Chemistry, Indian Institute of Technology (Indian School of Mines), Dhanbad, Jharkhand, India 826004
| | - Surabhi Rai
- Artificial Photosynthesis Laboratory, Department of Chemistry, Indian Institute of Technology (Indian School of Mines), Dhanbad, Jharkhand, India 826004
| | - Sk Samim Akhter
- Artificial Photosynthesis Laboratory, Department of Chemistry, Indian Institute of Technology (Indian School of Mines), Dhanbad, Jharkhand, India 826004
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6
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Jana M, Majumdar A. C–S Bond Cleavage, Redox Reactions, and Dioxygen Activation by Nonheme Dicobalt(II) Complexes. Inorg Chem 2017; 57:617-632. [DOI: 10.1021/acs.inorgchem.7b02432] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Manish Jana
- Department of Inorganic Chemistry, Indian Association for the Cultivation of Science, 2A & 2B Raja S. C. Mullick Road, Jadavpur, Kolkata 700032, India
| | - Amit Majumdar
- Department of Inorganic Chemistry, Indian Association for the Cultivation of Science, 2A & 2B Raja S. C. Mullick Road, Jadavpur, Kolkata 700032, India
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7
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Sharma AK, Schultz JW, Prior JT, Rath NP, Mirica LM. Coordination Chemistry of Bifunctional Chemical Agents Designed for Applications in 64Cu PET Imaging for Alzheimer's Disease. Inorg Chem 2017; 56:13801-13814. [PMID: 29112419 PMCID: PMC5698879 DOI: 10.1021/acs.inorgchem.7b01883] [Citation(s) in RCA: 37] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
![]()
Positron emission
tomography (PET) is emerging as one of the most important diagnostic
tools for brain imaging, yet the most commonly used radioisotopes
in PET imaging, 11C and 18F, have short half-lives,
and their usage is thus somewhat limited. By comparison, the 64Cu radionuclide has a half-life of 12.7 h, which is ideal
for administering and imaging purposes. In spite of appreciable research
efforts, high-affinity copper chelators suitable for brain imaging
applications are still lacking. Herein, we present the synthesis and
characterization of a series of bifunctional compounds (BFCs) based
on macrocyclic 1,4,7-triazacyclononane and 2,11-diaza[3.3](2,6)pyridinophane
ligand frameworks that exhibit a high affinity for Cu2+ ions. In addition, these BFCs contain a 2-phenylbenzothiazole fragment
that is known to interact tightly with amyloid β fibrillar aggregates.
Determination of the protonation constants (pKa values) and stability constants (log β values) of these
BFCs, as well as characterization of the isolated copper complexes
using X-ray crystallography, electron paramagnetic resonance spectroscopy,
and electrochemical studies, suggests that these BFCs exhibit desirable
properties for the development of novel 64Cu PET imaging
agents for Alzheimer’s disease. Novel bifunctional chelators
(BFCs) containing 1,4,7-triazacyclononane or pyridinophane macrocycles
and amyloid-binding 2-phenylbenzothiazole fragments have been synthesized,
and their copper coordination properties have been characterized in
detail. These BFCs are attractive candidates for the development of
novel 64Cu-labeled PET imaging agents for Alzheimer’s
disease.
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Affiliation(s)
- Anuj K Sharma
- Department of Chemistry, Washington University , One Brookings Drive, St. Louis, Missouri 63130-4899, United States
| | - Jason W Schultz
- Department of Chemistry, Washington University , One Brookings Drive, St. Louis, Missouri 63130-4899, United States
| | - John T Prior
- Department of Chemistry, Washington University , One Brookings Drive, St. Louis, Missouri 63130-4899, United States
| | - Nigam P Rath
- Department of Chemistry and Biochemistry, University of Missouri St. Louis , One University Boulevard, St. Louis, Missouri 63121-4400, United States
| | - Liviu M Mirica
- Department of Chemistry, Washington University , One Brookings Drive, St. Louis, Missouri 63130-4899, United States
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8
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Starus A, Nocek B, Bennett B, Larrabee JA, Shaw DL, Sae-Lee W, Russo MT, Gillner DM, Makowska-Grzyska M, Joachimiak A, Holz RC. Inhibition of the dapE-Encoded N-Succinyl-L,L-diaminopimelic Acid Desuccinylase from Neisseria meningitidis by L-Captopril. Biochemistry 2015; 54:4834-44. [PMID: 26186504 DOI: 10.1021/acs.biochem.5b00475] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Binding of the competitive inhibitor L-captopril to the dapE-encoded N-succinyl-L,L-diaminopimelic acid desuccinylase from Neisseria meningitidis (NmDapE) was examined by kinetic, spectroscopic, and crystallographic methods. L-Captopril, an angiotensin-converting enzyme (ACE) inhibitor, was previously shown to be a potent inhibitor of the DapE from Haemophilus influenzae (HiDapE) with an IC50 of 3.3 μM and a measured Ki of 1.8 μM and displayed a dose-responsive antibiotic activity toward Escherichia coli. L-Captopril is also a competitive inhibitor of NmDapE with a Ki of 2.8 μM. To examine the nature of the interaction of L-captopril with the dinuclear active site of DapE, we have obtained electron paramagnetic resonance (EPR) and magnetic circular dichroism (MCD) data for the enzymatically hyperactive Co(II)-substituted forms of both HiDapE and NmDapE. EPR and MCD data indicate that the two Co(II) ions in DapE are antiferromagnetically coupled, yielding an S = 0 ground state, and suggest a thiolate bridge between the two metal ions. Verification of a thiolate-bridged dinuclear complex was obtained by determining the three-dimensional X-ray crystal structure of NmDapE in complex with L-captopril at 1.8 Å resolution. Combination of these data provides new insights into binding of L-captopril to the active site of DapE enzymes as well as important inhibitor-active site residue interaction's. Such information is critical for the design of new, potent inhibitors of DapE enzymes.
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Affiliation(s)
- Anna Starus
- †Department of Chemistry and Biochemistry, Loyola University-Chicago, 1068 West Sheridan Road, Chicago, Illinois 60626, United States
| | - Boguslaw Nocek
- ‡Center for Structural Genomics of Infectious Diseases, Computation Institute, University of Chicago, 5735 South Ellis Avenue, Chicago, Illinois 60637, United States
| | - Brian Bennett
- §Department of Physics, Marquette University, Milwaukee, Wisconsin 53201, United States
| | - James A Larrabee
- ∥Department of Chemistry and Biochemistry, Middlebury College, Middlebury, Vermont 05753, United States
| | - Daniel L Shaw
- ∥Department of Chemistry and Biochemistry, Middlebury College, Middlebury, Vermont 05753, United States
| | - Wisath Sae-Lee
- ∥Department of Chemistry and Biochemistry, Middlebury College, Middlebury, Vermont 05753, United States
| | - Marie T Russo
- ∥Department of Chemistry and Biochemistry, Middlebury College, Middlebury, Vermont 05753, United States
| | - Danuta M Gillner
- ⊥Department of Chemistry, Silesian University of Technology, 44-100 Gliwice, Poland
| | - Magdalena Makowska-Grzyska
- ‡Center for Structural Genomics of Infectious Diseases, Computation Institute, University of Chicago, 5735 South Ellis Avenue, Chicago, Illinois 60637, United States
| | - Andrzej Joachimiak
- ‡Center for Structural Genomics of Infectious Diseases, Computation Institute, University of Chicago, 5735 South Ellis Avenue, Chicago, Illinois 60637, United States
| | - Richard C Holz
- #Department of Chemistry, Marquette University, Milwaukee, Wisconsin 53201, United States
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9
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Use of magnetic circular dichroism to study dinuclear metallohydrolases and the corresponding biomimetics. EUROPEAN BIOPHYSICS JOURNAL: EBJ 2015; 44:393-415. [DOI: 10.1007/s00249-015-1053-6] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/29/2015] [Revised: 05/30/2015] [Accepted: 06/07/2015] [Indexed: 11/26/2022]
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10
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Zarei SA, Piltan M, Hassanzadeh K, Akhtari K, Cinčić D. Synthesis, characterization, crystal structure and predicting the second-order optical nonlinearity of a new dicobalt(III) complex with Schiff base ligand. J Mol Struct 2015. [DOI: 10.1016/j.molstruc.2014.11.023] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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11
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Iso-valence Co(II) and mixed-valence Co(II/III) tetranuclear complexes: Synthesis, structure, magnetic properties and DFT study. Polyhedron 2013. [DOI: 10.1016/j.poly.2013.08.012] [Citation(s) in RCA: 9] [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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12
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Lehmann U, Lach J, Schleife F, Jeremies A, Kersting B. The Effects of Ring Expansion and
N
‐Methylation on the Complexation Behaviour of Macrodinucleating Hexaaza‐Dithiophenolate Macrocycles: Destabilization of the Co
III
Oxidation Level and Lowering of the Coordination Number. Eur J Inorg Chem 2013. [DOI: 10.1002/ejic.201201314] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Affiliation(s)
- Ulrike Lehmann
- Institut für Anorganische Chemie, Universität Leipzig, Johannisallee 29, 04103 Leipzig, Germany, Fax: +49‐341‐97‐36199, http://www.uni‐leipzig.de/~bkerst
| | - Jochen Lach
- Institut für Anorganische Chemie, Universität Leipzig, Johannisallee 29, 04103 Leipzig, Germany, Fax: +49‐341‐97‐36199, http://www.uni‐leipzig.de/~bkerst
| | - Frederik Schleife
- Institut für Anorganische Chemie, Universität Leipzig, Johannisallee 29, 04103 Leipzig, Germany, Fax: +49‐341‐97‐36199, http://www.uni‐leipzig.de/~bkerst
| | - Alexander Jeremies
- Institut für Anorganische Chemie, Universität Leipzig, Johannisallee 29, 04103 Leipzig, Germany, Fax: +49‐341‐97‐36199, http://www.uni‐leipzig.de/~bkerst
| | - Berthold Kersting
- Institut für Anorganische Chemie, Universität Leipzig, Johannisallee 29, 04103 Leipzig, Germany, Fax: +49‐341‐97‐36199, http://www.uni‐leipzig.de/~bkerst
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Majumder S, Mondal S, Lemoine P, Mohanta S. Dinuclear mixed-valence CoIIICoII complexes derived from a macrocyclic ligand: unique example of a CoIIICoII complex showing catecholase activity. Dalton Trans 2013; 42:4561-9. [DOI: 10.1039/c2dt32629a] [Citation(s) in RCA: 60] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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14
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Luo J, Rath NP, Mirica LM. Dinuclear Co(II)Co(III) Mixed-Valence and Co(III)Co(III) Complexes with N- and O-Donor Ligands: Characterization and Water Oxidation Studies. Inorg Chem 2011; 50:6152-7. [DOI: 10.1021/ic201031s] [Citation(s) in RCA: 52] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Jia Luo
- Department of Chemistry, Washington University, One Brookings Drive, St. Louis, Missouri 63130
| | - Nigam P. Rath
- Department of Chemistry and Biochemistry, University of Missouri—St. Louis, One University Boulevard, St. Louis, Missouri 63121
| | - Liviu M. Mirica
- Department of Chemistry, Washington University, One Brookings Drive, St. Louis, Missouri 63130
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15
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Lowry DJ, Helm ML. Synthesis of 1,4,7-Triphenyl-1,4,7-triphosphacyclononane: The First Metal-Free Synthesis of a [9]-aneP3R3 Ring. Inorg Chem 2010; 49:4732-4. [DOI: 10.1021/ic100274m] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Daniel J. Lowry
- Chemistry Department, Fort Lewis College, 1000 Rim Drive, Durango, Colorado 81301
| | - Monte L. Helm
- Chemistry Department, Fort Lewis College, 1000 Rim Drive, Durango, Colorado 81301
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16
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Kember MR, White AJP, Williams CK. Highly Active Di- and Trimetallic Cobalt Catalysts for the Copolymerization of CHO and CO2 at Atmospheric Pressure. Macromolecules 2010. [DOI: 10.1021/ma902582m] [Citation(s) in RCA: 156] [Impact Index Per Article: 11.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Michael R. Kember
- Department of Chemistry, Imperial College London, London SW7 2AZ, U.K
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17
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Larrabee JA, Johnson WR, Volwiler AS. Magnetic circular dichroism study of a dicobalt(II) complex with mixed 5- and 6-coordination: a spectroscopic model for dicobalt(II) hydrolases. Inorg Chem 2009; 48:8822-9. [PMID: 19691327 DOI: 10.1021/ic901000d] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The magnetic circular dichroism (MCD) study of [Co(2)(mu-OH)(mu-Ph(4)DBA)(TMEDA)(2)(OTf)], in which Ph(4)DBA is the dinucleating bis(carboxylate) ligand dibenzofuran-4,6-bis(diphenylacetate) and TMEDA is N,N,N',N'-tetramethylethylenediamine, is presented. This complex serves as an excellent spectroscopic model for a number of dicobalt(II) enzymes and proteins that have both the mu-hydroxo, mu-carboxylato bridging and asymmetric 6- and 5-coordination. The low-temperature MCD spectrum of the model complex shows bands at 490, 504, and 934 nm arising from d-d transitions on the 6-coordinate Co(II) and bands at 471, 522, 572, 594, and 638 nm arising from d-d transitions on the 5-coordinate Co(II). The most intense MCD bands are at 504 and 572 nm for 6- and 5-coordinate Co(II), respectively, and these two bands are found in the MCD spectra of dicobalt(II)-substituted methionine aminopeptidase from Escherichia coli (CoCoMetAP), glycerophosphodiesterase from Enterobacter aerogenes (CoCoGpdQ), aminopeptidase from Aeromonas proteolytica (CoCoAAP), and myohemerythrin from Themiste zostericola (CoCoMyoHry). These dicobalt(II)-substituted proteins are known to have one 5- and one 6-coordinate Co(II) bridged by one or two carboxylates and either a water or a hydroxide. The uncertainty of the bridging water's state of protonation is problematic, as this is a likely candidate for the attacking nucleophile in the dimetallohydrolases. Analysis of the variable-temperature variable-field (VTVH) MCD data determined that the Co(II) ions in the model complex are ferromagnetically coupled with a J of 3.0 cm(-1). A comparison of all dicobalt(II) complexes and dicobalt(II)-substituted protein active sites with the mu-hydroxo/aqua, mu-carboxylato bridging motif reveals that J is either zero or negative (antiferromagnetic) in the mu-aqua systems and positive (ferromagnetic) in the mu-hydroxo systems. It was also determined that the Co(II) ions in CoCoAAP and CoCoMyoHry are ferromagnetically coupled, each with a J of 3.4 cm(-1), which suggests that these ions have a mu-hydroxo bridging ligand.
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Affiliation(s)
- James A Larrabee
- Department of Chemistry and Biochemistry, Middlebury College, Middlebury, Vermont 05753, USA.
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18
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Singh R, Banerjee A, Gordon Y, Rajak KK. Binuclear cobalt(II/II) and cobalt(II/III) chelates with O2N2 ligands: synthesis, structure and magnetic studies. TRANSIT METAL CHEM 2009. [DOI: 10.1007/s11243-009-9249-1] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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19
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X-ray structure and spectroscopic characterization of divalent dinuclear cobalt complexes containing carboxylate- and phosphodiester- auxiliary bridges. Inorganica Chim Acta 2009. [DOI: 10.1016/j.ica.2009.02.010] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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20
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Syntheses and crystal structures of mono-, di- and trinuclear cobalt complexes of a salen type ligand. Inorganica Chim Acta 2009. [DOI: 10.1016/j.ica.2008.06.023] [Citation(s) in RCA: 45] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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21
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Jacob W, Mishra H, Pandey S, Lloret F, Mukherjee R. Six-coordinate CoIII and four-coordinate MII (M = Co, Zn) mixed-valence dimers supported by a deprotonated pyridine amide ligand: magnetism of a CoIIICoII complex and C–H⋯O/Cl/Br interactions. NEW J CHEM 2009. [DOI: 10.1039/b814303j] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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22
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Ama T, Yonemura T, Yoshimura T. Preparation, Characterization, and Structures of Dinuclear Cobalt(III) Complexes Triply Bridged by Two μ-Hydroxo and One μ-Carbonato. BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN 2008. [DOI: 10.1246/bcsj.81.1296] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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23
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Hamid M, Tahir AA, Mazhar M, Molloy KC, Kociok-Köhn G. Copper–cobalt heterobimetallic ceramic oxide thin film deposition: Synthesis, characterization and application of precursor. INORG CHEM COMMUN 2008. [DOI: 10.1016/j.inoche.2008.06.018] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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24
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Johansson FB, Bond AD, Nielsen UG, Moubaraki B, Murray KS, Berry KJ, Larrabee JA, McKenzie CJ. Dicobalt II−II, II−III, and III−III Complexes as Spectroscopic Models for Dicobalt Enzyme Active Sites. Inorg Chem 2008; 47:5079-92. [DOI: 10.1021/ic7020534] [Citation(s) in RCA: 70] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Frank B. Johansson
- Department of Physics and Chemistry, University of Southern Denmark, Campusvej 55, 5230 Odense M, Denmark, School of Chemistry, Building 23, Monash University, Clayton, Victoria Australia, Department of Chemistry and Biochemistry, Middlebury College, Middlebury, Vermont, U.S.A., and Westernport Secondary College, Hastings, Victoria, 3915, Australia
| | - Andrew D. Bond
- Department of Physics and Chemistry, University of Southern Denmark, Campusvej 55, 5230 Odense M, Denmark, School of Chemistry, Building 23, Monash University, Clayton, Victoria Australia, Department of Chemistry and Biochemistry, Middlebury College, Middlebury, Vermont, U.S.A., and Westernport Secondary College, Hastings, Victoria, 3915, Australia
| | - Ulla Gro Nielsen
- Department of Physics and Chemistry, University of Southern Denmark, Campusvej 55, 5230 Odense M, Denmark, School of Chemistry, Building 23, Monash University, Clayton, Victoria Australia, Department of Chemistry and Biochemistry, Middlebury College, Middlebury, Vermont, U.S.A., and Westernport Secondary College, Hastings, Victoria, 3915, Australia
| | - Boujemaa Moubaraki
- Department of Physics and Chemistry, University of Southern Denmark, Campusvej 55, 5230 Odense M, Denmark, School of Chemistry, Building 23, Monash University, Clayton, Victoria Australia, Department of Chemistry and Biochemistry, Middlebury College, Middlebury, Vermont, U.S.A., and Westernport Secondary College, Hastings, Victoria, 3915, Australia
| | - Keith S. Murray
- Department of Physics and Chemistry, University of Southern Denmark, Campusvej 55, 5230 Odense M, Denmark, School of Chemistry, Building 23, Monash University, Clayton, Victoria Australia, Department of Chemistry and Biochemistry, Middlebury College, Middlebury, Vermont, U.S.A., and Westernport Secondary College, Hastings, Victoria, 3915, Australia
| | - Kevin J. Berry
- Department of Physics and Chemistry, University of Southern Denmark, Campusvej 55, 5230 Odense M, Denmark, School of Chemistry, Building 23, Monash University, Clayton, Victoria Australia, Department of Chemistry and Biochemistry, Middlebury College, Middlebury, Vermont, U.S.A., and Westernport Secondary College, Hastings, Victoria, 3915, Australia
| | - James A. Larrabee
- Department of Physics and Chemistry, University of Southern Denmark, Campusvej 55, 5230 Odense M, Denmark, School of Chemistry, Building 23, Monash University, Clayton, Victoria Australia, Department of Chemistry and Biochemistry, Middlebury College, Middlebury, Vermont, U.S.A., and Westernport Secondary College, Hastings, Victoria, 3915, Australia
| | - Christine J. McKenzie
- Department of Physics and Chemistry, University of Southern Denmark, Campusvej 55, 5230 Odense M, Denmark, School of Chemistry, Building 23, Monash University, Clayton, Victoria Australia, Department of Chemistry and Biochemistry, Middlebury College, Middlebury, Vermont, U.S.A., and Westernport Secondary College, Hastings, Victoria, 3915, Australia
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Dinuclear iron, ruthenium and cobalt complexes containing 1,4-dimethyl-1,4,7-triazacyclononane ligands as well as carboxylato and oxo or hydroxo bridges. Inorganica Chim Acta 2006. [DOI: 10.1016/j.ica.2006.03.022] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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Fondo M, Ocampo N, García-Deibe AM, Corbella M, El Fallah MS, Cano J, Sanmartín J, Bermejo MR. Dinuclear Co(iii)/Co(iii) and Co(ii)/Co(iii) mixed-valent complexes: synthetic control of the cobalt oxidation level. Dalton Trans 2006:4905-13. [PMID: 17047739 DOI: 10.1039/b609961k] [Citation(s) in RCA: 44] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The reactivity of cobalt(II) salts towards H(3)L (2-(2-hydroxyphenyl)-1,3-bis[4-(2-hydroxyphenyl)-3-azabut-3-enyl]-1,3-imidazolidine) was studied in different reaction conditions. Accordingly, the interaction of cobalt(II) acetate with H(3)L in methanol gives rise to the discrete complex [Co(III)(2)L(OAc)(2)(OMe)]*1.5H(2)O.MeOH, 1. Reaction of cobalt(II) acetylacetonate with H(3)L in the presence of dicarboxylic acids was also investigated. Thus, when cobalt(II) acetylacetonate and H(3)L are mixed with terephthalic or malonic acid in 4 : 2 : 1 molar ratios, the mixed valent [Co(II/III)(2)L(acac)(p-O(2)CC(6)H(4)CO(2)H)][Co(II/III)(2)L(acac)(OH)]*2H(2)O*2MeOH, 2 and [Co(II/III)(2)L(acac)(O(2)CCH(2)CO(2)H)][Co(II/III)(2)L(acac)(OH)]*7H(2)O, complexes are isolated. Decreasing the pH of the medium, by addition of a second mol of dicarboxylic acid, leads to [Co(II/III)(2)L(O(2)CCH(2)CO(2))(MeOH)]*2MeOH, 4, while the reaction with terephthalic acid does not proceed. 1, 2 and 4 were crystallographically characterised and all the complexes are dinuclear, with hydrogen bonds that expand the initial nodes. The magnetic characterisation, as well as the NMR spectroscopy, indicates a diamagnetic nature for 1, in agreement with the presence of Co(III), showing the aerial oxidation suffered by the cobalt(II) ions. Nevertheless, are paramagnetic. Temperature variable magnetic measurements were recorded for the crystallographically characterised complexes 2 and 4 and these studies confirm the mixed valence Co(II)/Co(III) nature of the compounds. The best fits of the magnetic data give an axial distortion parameter Delta = 628.7 cm(-1) for 2 and 698.8 cm(-1) for 4, and spin-orbit coupling constant lambda = -117.8 cm(-1) for 2 and -107.0 cm(-1) for 4. Therefore, this study shows that the oxidation degree of the initial cobalt(ii) salt by atmospheric oxygen can be controlled according to the pH of the medium.
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Affiliation(s)
- Matilde Fondo
- Departamento de Química Inorgánica, Facultade de Ciencias, Universidade de Santiago de Compostela, E-27002, Lugo, Spain
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Calvo-Pérez V, Ostrovsky S, Vega A, Pelikan J, Spodine E, Haase W. Novel Example of a Chain Structure Formed by 1,4-Dioxane and Cobalt(II) Links. Chain [Co3(μ-OOCCF3)4(μ-H2O)2(OOCCF3)2(H2O)2(C4H8O2)]·2C4H8O2. Inorg Chem 2005; 45:644-9. [PMID: 16411699 DOI: 10.1021/ic051361o] [Citation(s) in RCA: 39] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The trimer [Co3(mu-OOCCF3)4(mu-H2O)2(OOCCF3)2(H2O)2(C4H8O2)].2C4H8O2. (1) is composed of three tetragonally distorted Co(II) centers bridged by four trifluoroacetates and two bridging water molecules. 1,4-Dioxane is coordinated at a distance of 2.120(3) A from the terminal cobalt Co2; the remaining oxygen of this 1,4-dioxane links the terminal cobalt to a neighbor trimer, forming a one-dimensional chain. The crystal structure displays a network of hydrogen bonds between four noncoordinated 1,4-dioxane molecules and the coordinated terminal water molecules. The magnetic properties of 1 were analyzed with the use of the Hamiltonian including isotropic exchange interactions between real spins of a high-spin Co(II), spin-orbit coupling and a low-symmetry crystal field acting within the (4)T(1g) ground manifold of each cobalt ion. A weak antiferromagnetic exchange interaction between cobalt ions in 1 was found. The results of the magnetic model are in good agreement with the experimental observations.
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Affiliation(s)
- Víctor Calvo-Pérez
- Facultad Ciencias Químicas y Farmacéuticas, CIMAT, Universidad de Chile, Casilla 233, Santiago, Chile.
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Rueff JM, Pillet S, Bonaventure G, Souhassou M, Rabu P. Synthesis, Structure and Magnetic Properties of the Cobalt(II) 1,1′-Biphenyl-2,2′-dicarboxylate Hydroxide Chain Compound [Co3{O2CC12H8CO2}2.5(OH)(H2O)2]n. Eur J Inorg Chem 2003. [DOI: 10.1002/ejic.200300267] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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Mukherjee J, Balamurugan V, Gupta R, Mukherjee R. Synthesis and properties of FeIIIand CoIIIcomplexes: structures of [(L2)Fe(N3)3], [(L2)2Fe2(μ-O)(μ-O2CMe)2][ClO4]2·2H2O and [(L2)2Co2(μ-OH)2(μ-O2CMe)][ClO4]3·MeCN [L2= methyl[2-(2-pyridyl)ethyl](2-pyridylmethyl)amine]. Dalton Trans 2003. [DOI: 10.1039/b305470e] [Citation(s) in RCA: 34] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Ross S, Weyhermüller T, Bill E, Wieghardt K, Chaudhuri P. (μ-Hydroxo)bis(μ-acetato)dimetal complexes: structural and magnetochemical characterization of the Cr(III)Ni(II) and the Cr(III)Cr(III) species. Inorganica Chim Acta 2002. [DOI: 10.1016/s0020-1693(02)00926-x] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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Syntheses and characterization of homodinuclear manganese and cobalt complexes bridged by a hemiacetal or by an acetato group in a μ-(η2:η1) bridging mode. Inorganica Chim Acta 2001. [DOI: 10.1016/s0020-1693(01)00294-8] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Fink K, Wang C, Staemmler V. Superexchange and Spin−Orbit Coupling in Chlorine-Bridged Binuclear Cobalt(II) Complexes. Inorg Chem 1999. [DOI: 10.1021/ic990280n] [Citation(s) in RCA: 55] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- K. Fink
- Lehrstuhl für Theoretische Chemie, Ruhr-Universität Bochum, D-44780 Bochum, Germany
| | - C. Wang
- Lehrstuhl für Theoretische Chemie, Ruhr-Universität Bochum, D-44780 Bochum, Germany
| | - V. Staemmler
- Lehrstuhl für Theoretische Chemie, Ruhr-Universität Bochum, D-44780 Bochum, Germany
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Role of the ligand in the cobalt(II)-catalysed decomposition of tert-butyl hydroperoxide. Evidence for the participation of bridged dicobalt complexes. Polyhedron 1997. [DOI: 10.1016/s0277-5387(96)00598-0] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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34
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Davies MB. Cobalt. Coord Chem Rev 1993. [DOI: 10.1016/0010-8545(93)80006-q] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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