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Ren W, Schulz CE, Shroyer MH, Xu W, Xi S, An P, Guo W, Li J. Electronic Configurations and the Effect of Peripheral Substituents of (Nitrosyl)iron Corroles. Inorg Chem 2022; 61:20385-20396. [DOI: 10.1021/acs.inorgchem.2c03026] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- Wanjie Ren
- College of Materials Science and Optoelectronic Technology and Chinese Academy of Sciences Center for Excellence in Topological Quantum Computation, University of Chinese Academy of Sciences, Yanqi Lake, Huairou District, Beijing101408, P. R. China
| | - Charles E. Schulz
- Department of Physics and Astronomy, Knox College, Galesburg, Illinois61401, United States
| | - Mark H. Shroyer
- Department of Physics and Astronomy, Knox College, Galesburg, Illinois61401, United States
| | - Wei Xu
- Beijing Synchrotron Radiation Facility, Institute of High Energy Physics, Chinese Academy of Sciences (CAS), Beijing100049, P. R. China
- RICMASS, Rome International Center for Materials Science Superstripes, Via dei Sabelli 119A, Rome00185, Italy
| | - Shibo Xi
- Institute of Chemical and Engineering Sciences, Agency for Science, Technology and Research, 1 Pesek Road, Jurong Island, Singapore627833, Singapore
| | - Pengfei An
- Beijing Synchrotron Radiation Facility, Institute of High Energy Physics, Chinese Academy of Sciences (CAS), Beijing100049, P. R. China
| | - Wenping Guo
- National Energy Center for Coal to Clean Fuels, Synfuels China Co., Ltd., Huairou District, Beijing101400, P. R. China
| | - Jianfeng Li
- College of Materials Science and Optoelectronic Technology and Chinese Academy of Sciences Center for Excellence in Topological Quantum Computation, University of Chinese Academy of Sciences, Yanqi Lake, Huairou District, Beijing101408, P. R. China
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2
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Kubba R, Yadav O, Maji S, Fridman N, Kumar A. Synthesis, structural characterizations, electrochemical properties and DFT calculations of highly fluorescent phosphorus(V) corroles. J Mol Struct 2022. [DOI: 10.1016/j.molstruc.2022.133780] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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Mondal S, Naik PK, Adha JK, Kar S. Synthesis, characterization, and reactivities of high valent metal–corrole (M = Cr, Mn, and Fe) complexes. Coord Chem Rev 2019. [DOI: 10.1016/j.ccr.2019.213043] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
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5
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Jiang X, Pomarico G, Bischetti M, Galloni P, Cicero DO, Cui Y, Kadish KM, Paolesse R. Iron, iron everywhere: synthesis and characterization of iron 5,10,15-triferrocenylcorrole complexes. NEW J CHEM 2018. [DOI: 10.1039/c7nj05076c] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A new series of iron triferrocenylcorroles with three different axial ligands, NO, Cl−and σ-Ph, is synthesized and characterized using1H NMR, electrochemical and spectroelectrochemical techniques in nonaqueous media.
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Affiliation(s)
- X. Jiang
- Department of Chemistry, University of Houston
- USA
| | - G. Pomarico
- Dipartimento di Scienze e Tecnologie Chimiche, Università di Roma Tor Vergata
- 00133 Rome
- Italy
| | - M. Bischetti
- Dipartimento di Scienze e Tecnologie Chimiche, Università di Roma Tor Vergata
- 00133 Rome
- Italy
| | - P. Galloni
- Dipartimento di Scienze e Tecnologie Chimiche, Università di Roma Tor Vergata
- 00133 Rome
- Italy
| | - D. O. Cicero
- Dipartimento di Scienze e Tecnologie Chimiche, Università di Roma Tor Vergata
- 00133 Rome
- Italy
| | - Y. Cui
- Department of Chemistry, University of Houston
- USA
| | - K. M. Kadish
- Department of Chemistry, University of Houston
- USA
| | - R. Paolesse
- Dipartimento di Scienze e Tecnologie Chimiche, Università di Roma Tor Vergata
- 00133 Rome
- Italy
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6
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Basumatary B, Rai J, Reddy RVR, Sankar J. Evidence for a [17] π-Electronic Full-Fledged Non-innocent Gallium(III)-Corrole Radical. Chemistry 2017; 23:17458-17462. [PMID: 29044747 DOI: 10.1002/chem.201704457] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2017] [Indexed: 11/10/2022]
Abstract
One-electron oxidation of a GaIII -corrole with N(4-BrC6 H4 )3 SbCl6 resulted in an air-stable non-innocent GaIII -corrole radical. The single-crystal X-ray crystallography of the 2,17-bis-formyl-5,10,15-tris(pentafluorophenyl)corrolato gallium(III)(chloride) radical ([3-Cl]. ) revealed delocalization of the unpaired electron, which was further confirmed by electron spin resonance (ESR) spectroscopy and spin density distribution plot. In addition, the nucleus-independent chemical shift (NICS), anisotropy-induced current density (AICD) and harmonic oscillator model of aromaticity (HOMA) supported a [17] π-electron-conjugated (or antiaromatic) radical.
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Affiliation(s)
- Biju Basumatary
- Department of Chemistry, Indian Institute of Science Education and Research, M.P, Indore bypass road, Bhopal, 462066, India
| | - Jyoti Rai
- Department of Chemistry, Indian Institute of Science Education and Research, M.P, Indore bypass road, Bhopal, 462066, India
| | - R V Ramana Reddy
- Department of Chemistry, Indian Institute of Science Education and Research, M.P, Indore bypass road, Bhopal, 462066, India
| | - Jeyaraman Sankar
- Department of Chemistry, Indian Institute of Science Education and Research, M.P, Indore bypass road, Bhopal, 462066, India
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7
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Tanaka T, Ooi S, Ide Y, Ikeue T, Suzuki M, Chen PP, Takahashi M, Osuka A. Different Antiferromagnetic Coupling between 5,5′‐ and 10,10′‐Linked Iron(III) Corrole Dimers. Eur J Inorg Chem 2017. [DOI: 10.1002/ejic.201601363] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Takayuki Tanaka
- Department of Chemistry Graduate School of Science Kyoto University 606‐8502 Sakyo‐ku, Kyoto Japan
| | - Shota Ooi
- Department of Chemistry Graduate School of Science Kyoto University 606‐8502 Sakyo‐ku, Kyoto Japan
| | - Yuki Ide
- Department of Chemistry, Graduate School of Science and Engineering Shimane University 1060 Nishikawatsu, Matsue 690‐8504 Japan
| | - Takahisa Ikeue
- Department of Chemistry, Graduate School of Science and Engineering Shimane University 1060 Nishikawatsu, Matsue 690‐8504 Japan
| | - Masaaki Suzuki
- Department of Chemistry, Graduate School of Science and Engineering Shimane University 1060 Nishikawatsu, Matsue 690‐8504 Japan
| | - Peter P.‐Y. Chen
- Department of Chemistry National Chung Hsing University Taichung 402 Taiwan Republic of China
| | - Masashi Takahashi
- Department of Chemistry Faculty of Science and Research Center for Materials with Integrated Properties 274‐8510 Toho University Japan
| | - Atsuhiro Osuka
- Department of Chemistry Graduate School of Science Kyoto University 606‐8502 Sakyo‐ku, Kyoto Japan
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8
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Ghosh A. Electronic Structure of Corrole Derivatives: Insights from Molecular Structures, Spectroscopy, Electrochemistry, and Quantum Chemical Calculations. Chem Rev 2017; 117:3798-3881. [PMID: 28191934 DOI: 10.1021/acs.chemrev.6b00590] [Citation(s) in RCA: 212] [Impact Index Per Article: 30.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
Presented herein is a comprehensive account of the electronic structure of corrole derivatives. Our knowledge in this area derives from a broad range of methods, including UV-vis-NIR absorption and MCD spectroscopies, single-crystal X-ray structure determination, vibrational spectroscopy, NMR and EPR spectroscopies, electrochemistry, X-ray absorption spectroscopy, and quantum chemical calculations, the latter including both density functional theory and ab initio multiconfigurational methods. The review is organized according to the Periodic Table, describing free-base and main-group element corrole derivatives, then transition-metal corroles, and finally f-block element corroles. Like porphyrins, corrole derivatives with a redox-inactive coordinated atom follow the Gouterman four-orbital model. A key difference from porphyrins is the much wider prevalence of noninnocent electronic structures as well as full-fledged corrole•2- radicals among corrole derivatives. The most common orbital pathways mediating ligand noninnocence in transition-metal corroles are the metal(dz2)-corrole("a2u") interaction (most commonly observed in Mn and Fe corroles) and the metal(dx2-y2)-corrole(a2u) interaction in coinage metal corroles. Less commonly encountered is the metal(dπ)-corrole("a1u") interaction, a unique feature of formal d5 metallocorroles. Corrole derivatives exhibit a rich array of optical properties, including substituent-sensitive Soret maxima indicative of ligand noninnocence, strong fluorescence in the case of lighter main-group element complexes, and room-temperature near-IR phosphorescence in the case of several 5d metal complexes. The review concludes with an attempt at identifying gaps in our current knowledge and potential future directions of electronic-structural research on corrole derivatives.
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Affiliation(s)
- Abhik Ghosh
- Department of Chemistry and Center for Theoretical and Computational Chemistry, UiT-The Arctic University of Norway , 9037 Tromsø, Norway
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9
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Fang H, Jing H, Ge H, Brothers PJ, Fu X, Ye S. The Mechanism of E–H (E = N, O) Bond Activation by a Germanium Corrole Complex: A Combined Experimental and Computational Study. J Am Chem Soc 2015; 137:7122-7. [DOI: 10.1021/jacs.5b01121] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Huayi Fang
- Beijing
National Laboratory for Molecular Sciences, College of Chemistry and
Molecular Engineering, Peking University, Beijing 100871, China
| | - Huize Jing
- Beijing
National Laboratory for Molecular Sciences, College of Chemistry and
Molecular Engineering, Peking University, Beijing 100871, China
| | - Haonan Ge
- Beijing
National Laboratory for Molecular Sciences, College of Chemistry and
Molecular Engineering, Peking University, Beijing 100871, China
| | - Penelope J. Brothers
- School
of Chemical Sciences, University of Auckland, Private Bag 92019, Auckland 1042, New Zealand
| | - Xuefeng Fu
- Beijing
National Laboratory for Molecular Sciences, College of Chemistry and
Molecular Engineering, Peking University, Beijing 100871, China
| | - Shengfa Ye
- Max-Planck Institute for Chemical Energy Conversion, Stiftstraße 34-36, D-45470 Mülheim an der Ruhr, Germany
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10
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Nardis S, Cicero DO, Licoccia S, Pomarico G, Berionni Berna B, Sette M, Ricciardi G, Rosa A, Fronczek FR, Smith KM, Paolesse R. Phenyl derivative of iron 5,10,15-tritolylcorrole. Inorg Chem 2014; 53:4215-27. [PMID: 24697623 PMCID: PMC4002138 DOI: 10.1021/ic5003572] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2014] [Indexed: 01/10/2023]
Abstract
The phenyl-iron complex of 5,10,15-tritolylcorrole was prepared by reaction of the starting chloro-iron complex with phenylmagnesium bromide in dichloromethane. The organometallic complex was fully characterized by a combination of spectroscopic methods, X-ray crystallography, and density functional theory (DFT) calculations. All of these techniques support the description of the electronic structure of this phenyl-iron derivative as a low-spin iron(IV) coordinated to a closed-shell corrolate trianion and to a phenyl monoanion. Complete assignments of the (1)H and (13)C NMR spectra of the phenyl-iron derivative and the starting chloro-iron complex were performed on the basis of the NMR spectra of the regioselectively β-substituted bromo derivatives and the DFT calculations.
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Affiliation(s)
- Sara Nardis
- Department
of Chemical Science and Technologies, Università
di Roma Tor Vergata, 00133 Roma, Italy
| | - Daniel O. Cicero
- Department
of Chemical Science and Technologies, Università
di Roma Tor Vergata, 00133 Roma, Italy
| | - Silvia Licoccia
- Department
of Chemical Science and Technologies, Università
di Roma Tor Vergata, 00133 Roma, Italy
| | - Giuseppe Pomarico
- Department
of Chemical Science and Technologies, Università
di Roma Tor Vergata, 00133 Roma, Italy
| | - Beatrice Berionni Berna
- Department
of Chemical Science and Technologies, Università
di Roma Tor Vergata, 00133 Roma, Italy
| | - Marco Sette
- Department
of Chemical Science and Technologies, Università
di Roma Tor Vergata, 00133 Roma, Italy
| | | | - Angela Rosa
- Dipartimento di
Scienze, Università della Basilicata, 85100 Potenza, Italy
| | - Frank R. Fronczek
- Department of Chemistry, Louisiana State University, Baton
Rouge, Louisiana 70803, United States
| | - Kevin M. Smith
- Department of Chemistry, Louisiana State University, Baton
Rouge, Louisiana 70803, United States
| | - Roberto Paolesse
- Department
of Chemical Science and Technologies, Università
di Roma Tor Vergata, 00133 Roma, Italy
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11
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Sakow D, Baabe D, Böker B, Burghaus O, Funk M, Kleeberg C, Menzel D, Pietzonka C, Bröring M. Iron 10-Thiacorroles: Bioinspired Iron(III) Complexes with an Intermediate Spin (S=3/2) Ground State. Chemistry 2014; 20:2913-24. [DOI: 10.1002/chem.201303786] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2013] [Revised: 10/17/2013] [Indexed: 11/07/2022]
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12
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Sinha W, Deibel N, Agarwala H, Garai A, Schweinfurth D, Purohit CS, Lahiri GK, Sarkar B, Kar S. Synthesis, Spectral Characterization, Structures, and Oxidation State Distributions in [(corrolato)FeIII(NO)]n (n = 0, +1, −1) Complexes. Inorg Chem 2014; 53:1417-29. [DOI: 10.1021/ic402304e] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Woormileela Sinha
- School
of Chemical Sciences, National Institute of Science Education and Research (NISER), Bhubaneswar, 751005, India
| | - Naina Deibel
- Institut
für Chemie und Biochemie, Anorganische Chemie, Freie Universität Berlin, Fabeckstraße 34-36, D-14195, Berlin, Germany
- Institut
für Anorganische Chemie, Universität Stuttgart, Pfaffenwaldring
55, D-70550, Stuttgart, Germany
| | - Hemlata Agarwala
- Department
of Chemistry, Indian Institute of Technology−Bombay, Powai, Mumbai 400076, India
| | - Antara Garai
- School
of Chemical Sciences, National Institute of Science Education and Research (NISER), Bhubaneswar, 751005, India
| | - David Schweinfurth
- Institut
für Chemie und Biochemie, Anorganische Chemie, Freie Universität Berlin, Fabeckstraße 34-36, D-14195, Berlin, Germany
| | - Chandra Shekhar Purohit
- School
of Chemical Sciences, National Institute of Science Education and Research (NISER), Bhubaneswar, 751005, India
| | - Goutam Kumar Lahiri
- Department
of Chemistry, Indian Institute of Technology−Bombay, Powai, Mumbai 400076, India
| | - Biprajit Sarkar
- Institut
für Chemie und Biochemie, Anorganische Chemie, Freie Universität Berlin, Fabeckstraße 34-36, D-14195, Berlin, Germany
| | - Sanjib Kar
- School
of Chemical Sciences, National Institute of Science Education and Research (NISER), Bhubaneswar, 751005, India
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13
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Sakow D, Böker B, Brandhorst K, Burghaus O, Bröring M. 10-Heterocorroles: Ring-Contracted Porphyrinoids with Fine-Tuned Aromatic and Metal-Binding Properties. Angew Chem Int Ed Engl 2013. [DOI: 10.1002/ange.201300757] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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14
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Sakow D, Böker B, Brandhorst K, Burghaus O, Bröring M. 10-Heterocorroles: Ring-Contracted Porphyrinoids with Fine-Tuned Aromatic and Metal-Binding Properties. Angew Chem Int Ed Engl 2013; 52:4912-5. [DOI: 10.1002/anie.201300757] [Citation(s) in RCA: 49] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2013] [Revised: 03/04/2013] [Indexed: 11/06/2022]
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Zyska B, Schwalbe M. Synthesis of sterically hindered xanthene-modified iron corroles with catalase-like activity. Chem Commun (Camb) 2013; 49:3799-801. [DOI: 10.1039/c3cc40625c] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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16
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Thomas KE, Alemayehu AB, Conradie J, Beavers CM, Ghosh A. The structural chemistry of metallocorroles: combined X-ray crystallography and quantum chemistry studies afford unique insights. Acc Chem Res 2012; 45:1203-14. [PMID: 22444488 DOI: 10.1021/ar200292d] [Citation(s) in RCA: 142] [Impact Index Per Article: 11.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Although they share some superficial structural similarities with porphyrins, corroles, trianionic ligands with contracted cores, give rise to fundamentally different transition metal complexes in comparison with the dianionic porphyrins. Many metallocorroles are formally high-valent, although a good fraction of them are also noninnocent, with significant corrole radical character. These electronic-structural characteristics result in a variety of fascinating spectroscopic behavior, including highly characteristic, paramagnetically shifted NMR spectra and textbook cases of charge-transfer spectra. Although our early research on corroles focused on spectroscopy, we soon learned that the geometric structures of metallocorroles provide a fascinating window into their electronic-structural characteristics. Thus, we used X-ray structure determinations and quantum chemical studies, chiefly using DFT, to obtain a comprehensive understanding of metallocorrole geometric and electronic structures. This Account describes our studies of the structural chemistry of metallocorroles. At first blush, the planar or mildly domed structure of metallocorroles might appear somewhat uninteresting particularly when compared to metalloporphyrins. Metalloporphyrins, especially sterically hindered ones, are routinely ruffled or saddled, but the missing meso carbon apparently makes the corrole skeleton much more resistant to nonplanar distortions. Ruffling, where the pyrrole rings are alternately twisted about the M-N bonds, is energetically impossible for metallocorroles. Saddling is also uncommon; thus, a number of sterically hindered, fully substituted metallocorroles exhibit almost perfectly planar macrocycle cores. Against this backdrop, copper corroles stand out as an important exception. As a result of an energetically favorable Cu(d(x2-y2))-corrole(π) orbital interaction, copper corroles, even sterically unhindered ones, are inherently saddled. Sterically hindered substituents accentuate this effect, sometimes dramatically. Thus, a crystal structure of a copper β-octakis(trifluoromethyl)-meso-triarylcorrole complex exhibits nearly orthogonal, adjacent pyrrole rings. Intriguingly, the formally isoelectronic silver and gold corroles are much less saddled than their copper congeners because the high orbital energy of the valence d(x2-y2) orbital discourages overlap with the corrole π orbital. A crystal structure of a gold β-octakis(trifluoromethyl)-meso-triarylcorrole complex exhibits a perfectly planar corrole core, which translates to a difference of 85° in the saddling dihedral angles between analogous copper and gold complexes. Gratifyingly, electrochemical, spectroscopic, and quantum chemical studies provide a coherent, theoretical underpinning for these fascinating structural phenomena. With the development of facile one-pot syntheses of corrole macrocycles in the last 10-15 years, corroles are now almost as readily accessible as porphyrins. Like porphyrins, corroles are promising building blocks for supramolecular constructs such as liquid crystals and metal-organic frameworks. However, because of their symmetry properties, corrole-based supramolecular constructs will probably differ substantially from porphyrin-based ones. We are particularly interested in exploiting the inherently saddled, chiral architectures of copper corroles to create novel oriented materials such as chiral liquid crystals. We trust that the fundamental structural principles uncovered in this Account will prove useful as we explore these fascinating avenues.
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Affiliation(s)
- Kolle E. Thomas
- Department of Chemistry and Center for Theoretical and Experimental Chemistry, University of Tromsø, 9037 Tromsø, Norway
| | - Abraham B. Alemayehu
- Department of Chemistry and Center for Theoretical and Experimental Chemistry, University of Tromsø, 9037 Tromsø, Norway
| | - Jeanet Conradie
- Department of Chemistry and Center for Theoretical and Experimental Chemistry, University of Tromsø, 9037 Tromsø, Norway
- Department of Chemistry, University of the Free State, 9300 Bloemfontein, Republic of South Africa
| | - Christine M. Beavers
- Advanced Light Source, Lawrence Berkeley National Laboratory, Berkeley, California 94720-8229, United States
| | - Abhik Ghosh
- Department of Chemistry and Center for Theoretical and Experimental Chemistry, University of Tromsø, 9037 Tromsø, Norway
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Ghosh A, Lee WZ, Ravikanth M. Synthesis, Structure and Properties of a Five-Coordinate Oxophosphorus(V) meso-Triphenylcorrole. Eur J Inorg Chem 2012. [DOI: 10.1002/ejic.201200651] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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18
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Abstract
The chlorido iron(III) complex of octaethyl-2,2′-bidipyrrin has been transformed to a series of pseudohalide complexes by ligand exchange reactions with azide, cyanate, thiocyanate and selenocyanate anions. All new complexes show the expected N-coordination of the axial ligand to the iron(III) center. In the solid state, all four species display an intermediate spin (S = 3/2) ground state, with a gradual increase of a high spin (S = 5/2) contribution at elevated temperatures for the members with the smallest ligand field strengths, i.e. the cyanato and the azido derivatives. In solution, proton NMR, and in particular IR spectroscopic studies support the interpretation of a high-spin state at ambient temperature throughout the series. The dependency of the spin state on the crystalline or dissolved state thus resembles that found for a similar series of halide derivatives before. In dichloromethane solution, the thiocyanato and selenocyanato complexes are very sensitive to aerial oxidation, forming oxacorrole and thiacorrole complexes as the only isolated products. These complexes show a S = 3/2 spin state in the solid as well as in solution, and their structural analyses prove the expected strong π-binding of the linear pseudohalide ion to the iron(III) central metal.
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Affiliation(s)
- Martin Bröring
- Institute of Inorganic and Analytical Chemistry, Technical University Braunschweig, Hagenring 30, 38106 Braunschweig, Germany
| | - Silke Köhler
- Institute of Inorganic and Analytical Chemistry, Technical University Braunschweig, Hagenring 30, 38106 Braunschweig, Germany
| | - Clemens Pietzonka
- Institute of Inorganic and Analytical Chemistry, Technical University Braunschweig, Hagenring 30, 38106 Braunschweig, Germany
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19
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Ghosh A, Ravikanth M. Synthesis, Structure, Spectroscopic, and Electrochemical Properties of Highly Fluorescent Phosphorus(V)-meso-Triarylcorroles. Chemistry 2012; 18:6386-96. [DOI: 10.1002/chem.201103226] [Citation(s) in RCA: 53] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2011] [Revised: 01/27/2012] [Indexed: 11/07/2022]
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Nardis S, Stefanelli M, Mohite P, Pomarico G, Tortora L, Manowong M, Chen P, Kadish KM, Fronczek FR, McCandless GT, Smith KM, Paolesse R. β-Nitro derivatives of iron corrolates. Inorg Chem 2012; 51:3910-20. [PMID: 22394192 PMCID: PMC3307940 DOI: 10.1021/ic3002459] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Two different methods for the regioselective nitration of different meso-triarylcorroles leading to the corresponding β-substituted nitrocorrole iron complexes have been developed. A two-step procedure affords three Fe(III) nitrosyl products-the unsubstituted corrole, the 3-nitrocorrole, and the 3,17-dinitrocorrole. In contrast, a one-pot synthetic approach drives the reaction almost exclusively to formation of the iron nitrosyl 3,17-dinitrocorrole. Electron-releasing substituents on the meso-aryl groups of the triarylcorroles induce higher yields and longer reaction times than what is observed for the synthesis of similar triarylcorroles with electron-withdrawing functionalities, and these results can be confidently attributed to the facile formation and stabilization of an intermediate iron corrole π-cation radical. Electron-withdrawing substituents on the meso-aryl groups of triarylcorrole also seem to labilize the axial nitrosyl group which, in the case of the pentafluorophenylcorrole derivative, results in the direct formation of a disubstituted iron μ-oxo dimer complex. The influence of meso-aryl substituents on the progress and products of the nitration reaction was investigated. In addition, to elucidate the most important factors which influence the redox reactivity of these different iron nitrosyl complexes, selected compounds were examined by cyclic voltammetry and thin-layer UV-visible or FTIR spectroelectrochemistry in CH(2)Cl(2).
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Affiliation(s)
- Sara Nardis
- Dipartimento di Scienze e Tecnologie Chimiche, Università di Roma Tor Vergata, via della Ricerca Scientifica, 1, 00133 Rome, Italy
| | - Manuela Stefanelli
- Dipartimento di Scienze e Tecnologie Chimiche, Università di Roma Tor Vergata, via della Ricerca Scientifica, 1, 00133 Rome, Italy
| | - Pruthviraj Mohite
- Dipartimento di Scienze e Tecnologie Chimiche, Università di Roma Tor Vergata, via della Ricerca Scientifica, 1, 00133 Rome, Italy
| | - Giuseppe Pomarico
- Dipartimento di Scienze e Tecnologie Chimiche, Università di Roma Tor Vergata, via della Ricerca Scientifica, 1, 00133 Rome, Italy
| | - Luca Tortora
- Dipartimento di Scienze e Tecnologie Chimiche, Università di Roma Tor Vergata, via della Ricerca Scientifica, 1, 00133 Rome, Italy
| | - Machima Manowong
- Department of Chemistry, University of Houston, Houston, Texas, 77204-5003 USA
| | - Ping Chen
- Department of Chemistry, University of Houston, Houston, Texas, 77204-5003 USA
| | - Karl M. Kadish
- Department of Chemistry, University of Houston, Houston, Texas, 77204-5003 USA
| | - Frank R. Fronczek
- Department of Chemistry, Louisiana State University, Baton Rouge, Louisiana 70803 USA
| | - Gregory T. McCandless
- Department of Chemistry, Louisiana State University, Baton Rouge, Louisiana 70803 USA
| | - Kevin M. Smith
- Department of Chemistry, Louisiana State University, Baton Rouge, Louisiana 70803 USA
| | - Roberto Paolesse
- Dipartimento di Scienze e Tecnologie Chimiche, Università di Roma Tor Vergata, via della Ricerca Scientifica, 1, 00133 Rome, Italy
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Thomas KE, Alemayehu AB, Conradie J, Beavers C, Ghosh A. Synthesis and molecular structure of gold triarylcorroles. Inorg Chem 2011; 50:12844-51. [PMID: 22111600 DOI: 10.1021/ic202023r] [Citation(s) in RCA: 91] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
A number of third-row transition-metal corroles have remained elusive as synthetic targets until now, notably osmium, platinum, and gold corroles. Against this backdrop, we present a simple and general synthesis of β-unsubstituted gold(III) triarylcorroles and the first X-ray crystal structure of such a complex. Comparison with analogous copper and silver corrole structures, supplemented by extensive scalar-relativistic, dispersion-corrected density functional theory calculations, suggests that "inherent saddling" may occur for of all coinage metal corroles. The degree of saddling, however, varies considerably among the three metals, decreasing conspicuously along the series Cu > Ag > Au. The structural differences reflect significant differences in metal-corrole bonding, which are also reflected in the electrochemistry and electronic absorption spectra of the complexes. From Cu to Au, the electronic structure changes from noninnocent metal(II)-corrole(•2-) to relatively innocent metal(III)-corrole(3-).
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Affiliation(s)
- Kolle E Thomas
- Department of Chemistry, University of Tromsø, 9037 Tromsø, Norway
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22
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Yang F, Shokhireva TK, Walker FA. Linear correlation between 1H and 13C chemical shifts of ferriheme proteins and model ferrihemes. Inorg Chem 2011; 50:1176-83. [PMID: 21244013 DOI: 10.1021/ic1020274] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The (1)H{(13)C} HMQC experiment at natural-abundance (13)C provides a very useful way of determining not only (1)H but also (13)C chemical shifts of most heme substituents, without isotopic labeling of the hemin. This is true both in model low-spin ferriheme complexes and in low-spin ferriheme proteins, even when the proton resonances are buried in the protein diamagnetic region, because the carbon shifts are much larger than the proton shifts. In addition, in many cases, the protohemin methyl cross peaks are fairly linearly related to each other, with the slope of the correlation, δ(C)/δ(H), being approximately -2.0 for most low-spin ferriheme proteins. The reasons why this should be the case, and when it is not, are discussed.
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Affiliation(s)
- Fei Yang
- Department of Chemistry and Biochemistry, The University of Arizona, P.O. Box 210041, Tucson, Arizona 85721-0041, United States
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23
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Schwalbe M, Dogutan DK, Stoian SA, Teets TS, Nocera DG. Xanthene-Modified and Hangman Iron Corroles. Inorg Chem 2011; 50:1368-77. [DOI: 10.1021/ic101943h] [Citation(s) in RCA: 48] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Matthias Schwalbe
- Department of Chemistry, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, Massachusetts 02139, United States
| | - Dilek K. Dogutan
- Department of Chemistry, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, Massachusetts 02139, United States
| | - Sebastian A. Stoian
- Department of Chemistry, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, Massachusetts 02139, United States
- Department of Chemistry, Carnegie Mellon University, 4400 Fifth Avenue, Pittsburgh, Pennsylvania 15213, United States
| | - Thomas S. Teets
- Department of Chemistry, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, Massachusetts 02139, United States
| | - Daniel G. Nocera
- Department of Chemistry, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, Massachusetts 02139, United States
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24
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Alemayehu AB, Hansen LK, Ghosh A. Nonplanar, noninnocent, and chiral: a strongly saddled metallocorrole. Inorg Chem 2010; 49:7608-10. [PMID: 20681518 DOI: 10.1021/ic1008736] [Citation(s) in RCA: 73] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The first crystal structure of a copper beta-octabromo-meso-triarylcorrole exhibits a uniquely saddled corrole macrocycle, where adjacent pyrrole rings are tilted relative to each other by 60-80 degrees. Such strong nonplanarity may be contrasted with the essentially planar macrocycle conformations observed in the vast majority of metallocorrole crystal structures. Density functional theory calculations suggest that two effects, ligand noninnocence and peripheral overcrowding, acting in concert, are responsible for the unique, observed conformation.
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Affiliation(s)
- Abraham B Alemayehu
- Department of Chemistry and Center for Thoretical and Computational Chemistry, University of Tromsø, N-9037 Tromsø, Norway
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25
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Dogutan DK, Stoian SA, McGuire R, Schwalbe M, Teets TS, Nocera DG. Hangman Corroles: Efficient Synthesis and Oxygen Reaction Chemistry. J Am Chem Soc 2010; 133:131-40. [DOI: 10.1021/ja108904s] [Citation(s) in RCA: 179] [Impact Index Per Article: 12.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Affiliation(s)
- Dilek K. Dogutan
- Department of Chemistry, 6-335, Massachusetts Institute of Technology 77 Massachusetts Avenue, Cambridge, Massachusetts 02139-4307, United States, and Department of Chemistry, Carnegie Mellon University Mellon Institute Pittsburgh, Pennsylvania 15213, United States
| | - Sebastian A. Stoian
- Department of Chemistry, 6-335, Massachusetts Institute of Technology 77 Massachusetts Avenue, Cambridge, Massachusetts 02139-4307, United States, and Department of Chemistry, Carnegie Mellon University Mellon Institute Pittsburgh, Pennsylvania 15213, United States
| | - Robert McGuire
- Department of Chemistry, 6-335, Massachusetts Institute of Technology 77 Massachusetts Avenue, Cambridge, Massachusetts 02139-4307, United States, and Department of Chemistry, Carnegie Mellon University Mellon Institute Pittsburgh, Pennsylvania 15213, United States
| | - Matthias Schwalbe
- Department of Chemistry, 6-335, Massachusetts Institute of Technology 77 Massachusetts Avenue, Cambridge, Massachusetts 02139-4307, United States, and Department of Chemistry, Carnegie Mellon University Mellon Institute Pittsburgh, Pennsylvania 15213, United States
| | - Thomas S. Teets
- Department of Chemistry, 6-335, Massachusetts Institute of Technology 77 Massachusetts Avenue, Cambridge, Massachusetts 02139-4307, United States, and Department of Chemistry, Carnegie Mellon University Mellon Institute Pittsburgh, Pennsylvania 15213, United States
| | - Daniel G. Nocera
- Department of Chemistry, 6-335, Massachusetts Institute of Technology 77 Massachusetts Avenue, Cambridge, Massachusetts 02139-4307, United States, and Department of Chemistry, Carnegie Mellon University Mellon Institute Pittsburgh, Pennsylvania 15213, United States
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26
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Synthesis, X-structure and solvent induced electronic states tuning of meso-tris(4-nitrophenyl)corrolato-copper complex. Inorganica Chim Acta 2010. [DOI: 10.1016/j.ica.2010.07.016] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
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27
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Gisk B, Brégier F, Krüger RA, Bröring M, Frankenberg-Dinkel N. Enzymatic Ring Opening of an Iron Corrole by Plant-Type Heme Oxygenases: Unexpected Substrate and Protein Selectivities. Biochemistry 2010; 49:10042-4. [DOI: 10.1021/bi1014369] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Björn Gisk
- Physiology of Microorganisms, Ruhr-University Bochum, 44780 Bochum, Germany
| | | | - Robin A. Krüger
- Fachbereich Chemie, Philipps-University Marburg, 35032 Marburg, Germany
| | - Martin Bröring
- Fachbereich Chemie, Philipps-University Marburg, 35032 Marburg, Germany
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28
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Bröring M, Brégier F, Burghaus O, Kleeberg C. A Biomimetic Copper Corrole - Preparation, Characterization, and Reconstitution with Horse Heart Apomyoglobin. Z Anorg Allg Chem 2010. [DOI: 10.1002/zaac.201000102] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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29
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Ye S, Tuttle T, Bill E, Simkhovich L, Gross Z, Thiel W, Neese F. The Electronic Structure of Iron Corroles: A Combined Experimental and Quantum Chemical Study. Chemistry 2008; 14:10839-51. [DOI: 10.1002/chem.200801265] [Citation(s) in RCA: 102] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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Roos BO, Veryazov V, Conradie J, Taylor PR, Ghosh A. Not Innocent: Verdict from Ab Initio Multiconfigurational Second-Order Perturbation Theory on the Electronic Structure of Chloroiron Corrole. J Phys Chem B 2008; 112:14099-102. [DOI: 10.1021/jp807734x] [Citation(s) in RCA: 82] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Björn O. Roos
- Department of Theoretical Chemistry, Chemical Center, University of Lund, P.O. Box 124, S-221 00 Lund, Sweden, Department of Chemistry, University of Tromsø, N-9037 Tromsø, Norway, Department of Chemistry, University of the Free State, 9300 Bloemfontein, Republic of South Africa, and Department of Chemistry and Centre for Scientific Computing, University of Warwick, Coventry CV4 7AL, United Kingdom
| | - Valera Veryazov
- Department of Theoretical Chemistry, Chemical Center, University of Lund, P.O. Box 124, S-221 00 Lund, Sweden, Department of Chemistry, University of Tromsø, N-9037 Tromsø, Norway, Department of Chemistry, University of the Free State, 9300 Bloemfontein, Republic of South Africa, and Department of Chemistry and Centre for Scientific Computing, University of Warwick, Coventry CV4 7AL, United Kingdom
| | - Jeanet Conradie
- Department of Theoretical Chemistry, Chemical Center, University of Lund, P.O. Box 124, S-221 00 Lund, Sweden, Department of Chemistry, University of Tromsø, N-9037 Tromsø, Norway, Department of Chemistry, University of the Free State, 9300 Bloemfontein, Republic of South Africa, and Department of Chemistry and Centre for Scientific Computing, University of Warwick, Coventry CV4 7AL, United Kingdom
| | - Peter R. Taylor
- Department of Theoretical Chemistry, Chemical Center, University of Lund, P.O. Box 124, S-221 00 Lund, Sweden, Department of Chemistry, University of Tromsø, N-9037 Tromsø, Norway, Department of Chemistry, University of the Free State, 9300 Bloemfontein, Republic of South Africa, and Department of Chemistry and Centre for Scientific Computing, University of Warwick, Coventry CV4 7AL, United Kingdom
| | - Abhik Ghosh
- Department of Theoretical Chemistry, Chemical Center, University of Lund, P.O. Box 124, S-221 00 Lund, Sweden, Department of Chemistry, University of Tromsø, N-9037 Tromsø, Norway, Department of Chemistry, University of the Free State, 9300 Bloemfontein, Republic of South Africa, and Department of Chemistry and Centre for Scientific Computing, University of Warwick, Coventry CV4 7AL, United Kingdom
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31
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Kuck S, Hoffmann G, Bröring M, Fechtel M, Funk M, Wiesendanger R. “Naked” Iron-5,10,15-triphenylcorrole on Cu(111): Observation of Chirality on a Surface and Manipulation of Multiple Conformational States by STM. J Am Chem Soc 2008; 130:14072-3. [DOI: 10.1021/ja8059478] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Stefan Kuck
- Institute of Applied Physics, University of Hamburg, Germany, and Fachbereich Chemie, Philipps-Universität Marburg, Germany
| | - Germar Hoffmann
- Institute of Applied Physics, University of Hamburg, Germany, and Fachbereich Chemie, Philipps-Universität Marburg, Germany
| | - Martin Bröring
- Institute of Applied Physics, University of Hamburg, Germany, and Fachbereich Chemie, Philipps-Universität Marburg, Germany
| | - Martin Fechtel
- Institute of Applied Physics, University of Hamburg, Germany, and Fachbereich Chemie, Philipps-Universität Marburg, Germany
| | - Markus Funk
- Institute of Applied Physics, University of Hamburg, Germany, and Fachbereich Chemie, Philipps-Universität Marburg, Germany
| | - Roland Wiesendanger
- Institute of Applied Physics, University of Hamburg, Germany, and Fachbereich Chemie, Philipps-Universität Marburg, Germany
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32
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Bröring M, Köhler S, Kleeberg C. Norcorrole: Observation of the Smallest Porphyrin Variant with a N4
Core. Angew Chem Int Ed Engl 2008; 47:5658-60. [DOI: 10.1002/anie.200801196] [Citation(s) in RCA: 77] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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33
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Bröring M, Köhler S, Kleeberg C. Norcorrol: die kleinste Porphyrin-Strukturvariante mit N4
-Kern. Angew Chem Int Ed Engl 2008. [DOI: 10.1002/ange.200801196] [Citation(s) in RCA: 39] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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34
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Bröring M, Köhler S, Link S, Burghaus O, Pietzonka C, Kelm H, Krüger HJ. Iron Chelates of 2,2′-Bidipyrrin: Stable Analogues of the Labile Iron Bilins. Chemistry 2008; 14:4006-16. [DOI: 10.1002/chem.200701919] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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35
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Bröring M, Brégier F, Cónsul Tejero E, Hell C, Holthausen MC. Revisiting the electronic ground state of copper corroles. Angew Chem Int Ed Engl 2007; 46:445-8. [PMID: 17131440 DOI: 10.1002/anie.200603676] [Citation(s) in RCA: 141] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Martin Bröring
- Fachbereich Chemie, Philipps-Universität Marburg, Hans-Meerwein-Strasse, 35043 Marburg, Germany.
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36
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Song YF, Berry JF, Bill E, Bothe E, Weyhermüller T, Wieghardt K. Iron complexes of new pentadentate ligands containing the 1,4,7-triazacyclononane-1,4-diacetate motif. spectroscopic, electro-, and photochemical studies. Inorg Chem 2007; 46:2208-19. [PMID: 17315865 DOI: 10.1021/ic062001j] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Three new pentadentate, pendent arm macrocycles containing the 1,4,7-triazacyclononane-1,4-diacetate motif have been synthesized, and their coordination chemistry with Fe(III) has been investigated. Eight new octahedral Fe(III) complexes containing chloro, azido, or mu-oxo ligands have been synthesized, five of which have been characterized by X-ray crystallography. Spectroscopic characterization of these octahedral Fe(III) complexes by UV-vis, IR, electrochemistry, EPR, magnetic susceptibility, and zero-field Mössbauer measurements firmly establishes the high-spin state of the iron in all complexes. Electrochemistry studies of the azido-Fe(III) complexes show that they can be reversibly oxidized to the corresponding Fe(IV) species at -20 degrees C, and Fe(II), Fe(III), and Fe(IV) species show characteristic IR and UV-vis profiles. Photolysis of one of the azido complexes was studied as a function of temperature (room temperature vs 77 K) and wavelength (480, 419, and 330 nm). Photoreduction to a high-spin Fe(II) species occurs under all conditions, which is proposed to be the dominant photochemical pathway generally available to high-spin ferric azido complexes.
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Affiliation(s)
- Yu-Fei Song
- Max-Planck-Institut für Bioanorganische Chemie, Stiftstrasse 34-36, D-45470 Mülheim an der Ruhr, Germany.
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37
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Bröring M, Brégier F, Cónsul Tejero E, Hell C, Holthausen M. Zum elektronischen Grundzustand des Kupfercorrols. Angew Chem Int Ed Engl 2007. [DOI: 10.1002/ange.200603676] [Citation(s) in RCA: 56] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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38
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Berry JF, Bill E, Bothe E, Neese F, Wieghardt K. Octahedral Non-Heme Oxo and Non-Oxo Fe(IV) Complexes: An Experimental/Theoretical Comparison. J Am Chem Soc 2006; 128:13515-28. [PMID: 17031965 DOI: 10.1021/ja063590v] [Citation(s) in RCA: 41] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Electron-transfer series are described for three ferric complexes of the pentadentate ligand 4,8,11-trimethyl-1,4,8,11-tetraazacyclotetradecane-1-acetate (Me(3)cyclam-acetate) with axial chloride, fluoride, and azide ligands. These complexes can all be reduced coulometrically to their Fe(II) analogs and oxidized reversibly to the corresponding Fe(IV) species. The Fe(II), Fe(III), and Fe(IV) species have been studied spectroscopically and their UV-vis, Mössbauer, EPR, and IR spectra are presented. The fluoro species [(Me(3)cyclam-acetate)FeF](n+) (n = 0, 1, 2) have been studied computationally using density functional theory (DFT), and the electronic structure of the Fe(IV) dication [(Me(3)cyclam-acetate)FeF](2+) is compared with that of the isoelectronic Fe(IV) oxo cation [(Me(3)cyclam-acetate)FeO](+); the different properties of the two species are mainly due to the significantly covalent Fe=O pi bonds in the latter.
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Affiliation(s)
- John F Berry
- Max-Planck-Institut für Bioanorganische Chemie, Stiftstrasse 34-36, D-45470 Mülheim an der Ruhr, Germany
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39
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Ghosh A. Transition metal spin state energetics and noninnocent systems: challenges for DFT in the bioinorganic arena. J Biol Inorg Chem 2006; 11:712-24. [PMID: 16841211 DOI: 10.1007/s00775-006-0135-4] [Citation(s) in RCA: 162] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2006] [Accepted: 06/14/2006] [Indexed: 11/25/2022]
Abstract
Although density functional theory (DFT) provides a generally good description of transition metal systems, we have identified several cases, involving Fe(III) porphyrins and related systems, where common functionals fail to correctly describe the energetics of the different low-lying spin states. The question of metal- versus ligand-centered oxidation in high-valent transition metal complexes is also a challenging one for DFT calculations, as I have tried to illustrate with examples from among porphyrin, corrole, biliverdine, and NO complexes. In a number of cases, I have compared results obtained with different exchange-correlation functionals; in addition, I have added a discussion on the relative performance of pure versus hybrid functionals. Finally, I have offered some thoughts on the role that traditional wavefunction-based ab initio methods, now essentially absent from the bioinorganic arena, might play in the future.
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Affiliation(s)
- Abhik Ghosh
- Department of Chemistry, University of Tromsø, 9037 Tromsø, Norway.
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40
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Walker FA, Licoccia S, Paolesse R. Iron corrolates: Unambiguous chloroiron(III) (corrolate)2− π-cation radicals. J Inorg Biochem 2006; 100:810-37. [PMID: 16519943 DOI: 10.1016/j.jinorgbio.2006.01.038] [Citation(s) in RCA: 75] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/31/2005] [Revised: 01/09/2006] [Accepted: 01/09/2006] [Indexed: 10/24/2022]
Abstract
The structures, electron configurations, magnetic susceptibilities, spectroscopic properties, molecular orbital energies and spin density distributions, redox properties and reactivities of iron corrolates having chloride, phenyl, pyridine, NO and other ligands are reviewed. It is shown that with one very strong donor ligand such as phenyl anion the electron configuration of the metal is d(4)S=1 Fe(IV) coordinated to a (corrolate)(3-) anion, while with one weaker donor ligand such as chloride or other halide, the electron configuration is d(5)S=3/2 Fe(III) coordinated to a (corrolate)(2-.) pi-cation radical, with antiferromagnetic coupling between the metal and corrolate radical electron. Many of these complexes have been studied by electrochemical techniques and have rich redox reactivity, in most cases involving two 1-electron oxidations and two 1-electron reductions, and it is not possible to tell, from the shapes of cyclic voltammetric waves, whether the electron is added or removed from the metal or the macrocycle; often infrared, UV-Vis, or EPR spectroscopy can provide this information. (1)H and (13)C NMR spectroscopic methods are most useful in delineating the spin state and pattern of spin density distribution of the complexes listed above, as would also be expected to be the case for the recently-reported formal Fe(V)O corrolate, if this complex were stable enough for characterization by NMR spectroscopy. Iron, manganese and chromium corrolates can be oxidized by iodosylbenzene and other common oxidants used previously with metalloporphyrinates to effect efficient oxidation of substrates. Whether the "resting state" form of these complexes, most generally in the case of iron [FeCl(Corr)], actually has the electron configuration Fe(IV)(Corr)(3-) or Fe(III)(Corr)(2-.) is not relevant to the high-valent reactivity of the complex.
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Affiliation(s)
- F Ann Walker
- Department of Chemistry, University of Arizona, 1306 E. University Blvd., Tucson, AZ 85721-0041, USA.
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