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Calancea S, Carrella L, Mocanu T, Sadohin V, Raduca M, Gutu I, Rocha JC, Vaz MGF, Rentschler E, Andruh M. Magnetic Molecular Rectangles Constructed from Functionalized Nitronyl‐Nitroxide Ligands and Lanthanide(III) Ions. Eur J Inorg Chem 2020. [DOI: 10.1002/ejic.202000954] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Affiliation(s)
- Sergiu Calancea
- Inorganic Chemistry Laboratory Faculty of Chemistry University of Bucharest Str. Dumbrava Rosie nr. 23 020464 Bucharest Romania
- Moldova State University Faculty of Chemistry and Chemical, Technology Chişinău 2009-Chisinau Moldova
| | - Luca Carrella
- Department of Chemistry Johannes Gutenberg University Mainz Duesbergweg 10–14 55128 - Mainz Germany
| | - Teodora Mocanu
- Inorganic Chemistry Laboratory Faculty of Chemistry University of Bucharest Str. Dumbrava Rosie nr. 23 020464 Bucharest Romania
- Coordination and Supramolecular Chemistry Laboratory “Ilie Murgulescu” Institute of Physical Chemistry Romanian Academy Splaiul Independentei 202 Bucharest 060021 Romania
| | - Vladimir Sadohin
- Moldova State University Faculty of Chemistry and Chemical, Technology Chişinău 2009-Chisinau Moldova
| | - Mihai Raduca
- Inorganic Chemistry Laboratory Faculty of Chemistry University of Bucharest Str. Dumbrava Rosie nr. 23 020464 Bucharest Romania
| | - Iacob Gutu
- Moldova State University Faculty of Chemistry and Chemical, Technology Chişinău 2009-Chisinau Moldova
| | - Julio C. Rocha
- Universidade Federal Fluminense Instituto de Química 24020-346-Niterói Rio de Janeiro Brazil
| | - Maria G. F. Vaz
- Universidade Federal Fluminense Instituto de Química 24020-346-Niterói Rio de Janeiro Brazil
| | - Eva Rentschler
- Department of Chemistry Johannes Gutenberg University Mainz Duesbergweg 10–14 55128 - Mainz Germany
| | - Marius Andruh
- Inorganic Chemistry Laboratory Faculty of Chemistry University of Bucharest Str. Dumbrava Rosie nr. 23 020464 Bucharest Romania
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Xiao ZX, Miao H, Shao D, Wei HY, Zhang YQ, Wang XY. A family of lanthanide compounds with reduced nitronyl nitroxide diradical: syntheses, structures and magnetic properties. Dalton Trans 2018; 47:7925-7933. [DOI: 10.1039/c8dt01112e] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Abstract
A new diradical based on the pyrazine ring and a series of Ln2 compounds with its reduced form have been synthesized and characterized structurally and magnetically.
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Affiliation(s)
- Zhao-Xin Xiao
- State Key Laboratory of Coordination Chemistry
- Collaborative Innovation Center of Advanced Microstructures
- School of Chemistry and Chemical Engineering
- Nanjing University
- Nanjing
| | - Hao Miao
- State Key Laboratory of Coordination Chemistry
- Collaborative Innovation Center of Advanced Microstructures
- School of Chemistry and Chemical Engineering
- Nanjing University
- Nanjing
| | - Dong Shao
- State Key Laboratory of Coordination Chemistry
- Collaborative Innovation Center of Advanced Microstructures
- School of Chemistry and Chemical Engineering
- Nanjing University
- Nanjing
| | - Hai-Yan Wei
- Jiangsu Key Laboratory of Biofunctional Materials
- School of Chemistry and Materials Science
- Nanjing Normal University
- Nanjing
- China
| | - Yi-Quan Zhang
- Jiangsu Key Laboratory for NSLSCS
- School of Physical Science and Technology
- Nanjing Normal University
- Nanjing 210023
- China
| | - Xin-Yi Wang
- State Key Laboratory of Coordination Chemistry
- Collaborative Innovation Center of Advanced Microstructures
- School of Chemistry and Chemical Engineering
- Nanjing University
- Nanjing
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Syntheses, structures, and magnetic characterizations of five Mn(II) and Co(II) complexes based on 2,6-Pyridyl-substituted nitronyl and imino nitroxide radical. Inorganica Chim Acta 2016. [DOI: 10.1016/j.ica.2016.01.037] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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Ivanova A, Romanova J, Tadjer A, Baumgarten M. Magnetostructural correlation for rational design of Mn(II) hybrid-spin complexes. J Phys Chem A 2013; 117:670-8. [PMID: 23256643 DOI: 10.1021/jp312258j] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Abstract
The magnetic properties of a series of manganese(II) diacetylacetonate and dihexafluoroacetylacetonate hybrid-spin complexes with neutral pyridine-based organic radicals were characterized theoretically by DFT calculations. Three stable radicals, in which a radical group is bound in either para or meta position with respect to the pyridine nitrogen atom, were considered. The correct stable structures and multiplets of the complexes were obtained by full geometry optimization starting from an ideal structure. A total of three important geometry descriptors of the complexes were monitored and related to their magnetic characteristics. These structural parameters are (i) the torsion angle governing the conjugation of the organic radical m-PyNO (anti versus gauche), (ii) the coordination geometry of the acetyl acetonate ligands around the metal ion (square versus rhombic), and (iii) the relative orientation of the organic radical with respect to the acetyl acetonate plane (parallel versus perpendicular). It was found that the magnetic properties are not sensitive to the orientation of the radicals with respect to the equatorial plane but do depend on the conformation of the organic radicals. Even a spin switch between the ferromagnetic (S = (7)/(2)) and antiferromagnetic (S = (3)/(2)) ground state was found to be feasible for one of the complexes upon variation of the organic radical geometry, namely, the dihedral angle between the organic radical moiety and the pyridine ring. The pattern of molecular orbital overlap was determined to be the key factor governing the exchange coupling in the modeled systems. Bonding π-type overlap provides antiferromagnetic coupling in all complexes of the para radicals. In the meta analogues, the spins are coupled through the σ orbitals. A low-spin ground state occurs whenever a continuous σ-overlap pathway is present in the complex. Ferromagnetic interaction requires σ-π orthogonality of the pyridine atomic orbitals and/or π-antibonding Mn-pyridine natural orbital overlap. Using an estimate of the donor-acceptor energy stabilization, the affinity of a given Mn(II) d-orbital to mix with the sp(2) orbital from pyridine can be predicted.
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Affiliation(s)
- Anela Ivanova
- Department of Physical Chemistry, Faculty of Chemistry and Pharmacy, University of Sofia, 1 James Bourchier Avenue, 1164 Sofia, Bulgaria.
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Vaz MGF, Allão RA, Akpinar H, Schlueter JA, Santos S, Lahti PM, Novak MA. Magnetic Mn and Co complexes with a large polycyclic aromatic substituted nitronylnitroxide. Inorg Chem 2012; 51:3138-45. [PMID: 22356306 DOI: 10.1021/ic202623p] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
2-(1'-Pyrenyl)-4,4,5,5-tetramethyl-4,5-dihydro-1H-imidazole-3-oxide-1-oxyl (PyrNN) was reacted with M(hfac)(2) (M = Mn(II) and Co(II), hfac = hexafluoracetylacetonate) to give two isostructural ML(2) stoichiometry M(hfac)(2)(PyrNN)(2) complexes and a ML stoichiometry one-dimensional (1-D) polymer chain complex [Mn(hfac)(2)(PyrNN)]. The ML(2) complexes have similar crystal structures with monoclinic unit cells, in which one NO unit from each PyrNN ligand is bonded to the transition metal on cis vertices of a distorted octahedron. The major magnetic interactions are intracomplex metal-to-radical exchange (J), and intermolecular exchange across a close contact between the uncoordinated NO units (J'). For M = Mn(II) an approximate chain model fit gives g = 2.0, J = (-)125 cm(-1) and J' = (-)49 cm(-1); for M = Co(II), g = 2.4, J = (-)180 cm(-1), and J' = (-)70 cm(-1). Hybrid density functional theory (DFT) computations modeling the intermolecular exchange by using only the radical units across the close contact are in good accord with the estimated values of J'. The chain type complex structure shows solvent incorporation for overall structure [Mn(hfac)(2)(PyrNN)](n)·0.5(CHCl(3))·0.5(C(7)H(16)). Both NO groups of the PyrNN ligand are complexed to form helical chains, with very strong metal to radical antiferromagnetic exchange that gives overall ferrimagnetic behavior.
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Affiliation(s)
- Maria G F Vaz
- Instituto de Química, Universidade Federal Fluminense, Niterói, RJ 24020-150, Brazil.
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Sullivan DJ, Clérac R, Jennings M, Lough AJ, Preuss KE. Trinuclear Mn(ii) complex with paramagnetic bridging 1,2,3-dithiazolyl ligands. Chem Commun (Camb) 2012; 48:10963-5. [DOI: 10.1039/c2cc35869g] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Ratera I, Veciana J. Playing with organic radicals as building blocks for functional molecular materials. Chem Soc Rev 2012; 41:303-49. [DOI: 10.1039/c1cs15165g] [Citation(s) in RCA: 600] [Impact Index Per Article: 50.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
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Zhao QH, Liao DZ, Jiang ZH, Yan SP, Gao S, Sun BW. Crystal Structure and Magnetic Properties of a Copper(II) Chloride Complex with Nitronyl Nitroxide. J COORD CHEM 2010. [DOI: 10.1080/00958970211892] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Affiliation(s)
- Qi-Hua Zhao
- a Department of Chemistry , Nankai University , Tianjin, 300071, P.R. China
| | - Dai-Zheng Liao
- a Department of Chemistry , Nankai University , Tianjin, 300071, P.R. China
| | - Zong-Hui Jiang
- a Department of Chemistry , Nankai University , Tianjin, 300071, P.R. China
| | - Shi-Ping Yan
- a Department of Chemistry , Nankai University , Tianjin, 300071, P.R. China
| | - Song Gao
- b Research Centre of Rare Earth Chemistry , Peking University , Beijing, 100871, P.R. China
| | - Bai-Wang Sun
- b Research Centre of Rare Earth Chemistry , Peking University , Beijing, 100871, P.R. China
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Zhang L, Li SQ, Liao DZ, Jlang ZH, Yan SP, Wang GL, Wang Z, Shen PW, Yao XK, Wang HG. Synthesis, characterization and crystal structures of manganese (II) complexes containing nitronyl nitroxide and its reduced derivative. CHINESE J CHEM 2010. [DOI: 10.1002/cjoc.19990170406] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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Belorizky E, Rey P. Interpretation of the magnetic behaviour of an hexakis manganese(II)-nitroxide oligonuclear complex. Mol Phys 2007. [DOI: 10.1080/00268979200100401] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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Wang LY, Wang XQ, Jiang K, Chang JL, Wang YF. Syntheses, crystal structures and magnetic properties of a new nitronyl nitroxide NIT2-bithph and its manganese(II) compound [Mn(hfac)2(IMHBithph)]2·(NIT2-bithph)(C6H14). J Mol Struct 2007. [DOI: 10.1016/j.molstruc.2006.11.016] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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Caneschi A, Gatteschi D, Rey P. The Chemistry and Magnetic Properties of Metal Nitronyl Nitroxide Complexes. PROGRESS IN INORGANIC CHEMISTRY 2007. [DOI: 10.1002/9780470166406.ch6] [Citation(s) in RCA: 241] [Impact Index Per Article: 14.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
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Luneau D, Rey P. New Manganese(II) Complexes of Nitronyl Nitroxide Radicals. Synthesis, Structure and Magnetic Properties. ACTA ACUST UNITED AC 2006. [DOI: 10.1080/10587259508031844] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Affiliation(s)
- Dominique Luneau
- a Laboratoire de Chimie de Coordination (URA CNRS 1194) , CEA-DRFMC-SESAM, Centre d'Etudes Nuclcaires, 17 rue des Martyrs, 38054, Grenoble Cedex 9 , France
| | - Paul Rey
- a Laboratoire de Chimie de Coordination (URA CNRS 1194) , CEA-DRFMC-SESAM, Centre d'Etudes Nuclcaires, 17 rue des Martyrs, 38054, Grenoble Cedex 9 , France
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Ojima T, Akutsu H, Yamada JI, Nakatsuji S. Magnetic properties of anthracene derivatives and the corresponding photo-dimers with stable radical substituents. Polyhedron 2001. [DOI: 10.1016/s0277-5387(01)00615-5] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Luneau D, Romero FM, Ziessel R. Nitronyl Nitroxide Biradicals as Tetradentate Chelates: Unusually Large Metal−Nitroxide Ferromagnetic Interactions. Inorg Chem 1998. [DOI: 10.1021/ic9803412] [Citation(s) in RCA: 96] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Dominique Luneau
- Département de Recherche Fondamentale sur la Matière Condensée, Service de Chimie Inorganique et Biologique, Laboratoire de Chimie de Coordination (URA CNRS 1194), CEA-Grenoble, 38054 Grenoble, France, and Laboratoire de Chimie, d'Électronique et de Photonique Moléculaires, École de Chimie, Polymères et Matériaux, UPRES-A 7008, 1 Rue Blaise Pascal, 67008 Strasbourg, France
| | - Francisco M. Romero
- Département de Recherche Fondamentale sur la Matière Condensée, Service de Chimie Inorganique et Biologique, Laboratoire de Chimie de Coordination (URA CNRS 1194), CEA-Grenoble, 38054 Grenoble, France, and Laboratoire de Chimie, d'Électronique et de Photonique Moléculaires, École de Chimie, Polymères et Matériaux, UPRES-A 7008, 1 Rue Blaise Pascal, 67008 Strasbourg, France
| | - Raymond Ziessel
- Département de Recherche Fondamentale sur la Matière Condensée, Service de Chimie Inorganique et Biologique, Laboratoire de Chimie de Coordination (URA CNRS 1194), CEA-Grenoble, 38054 Grenoble, France, and Laboratoire de Chimie, d'Électronique et de Photonique Moléculaires, École de Chimie, Polymères et Matériaux, UPRES-A 7008, 1 Rue Blaise Pascal, 67008 Strasbourg, France
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Transition metal complexes with nitronyl nitroxides part 2. Crystal structure and magnetism of manganese(II) compounds including radicals and their reduced derivatives. Inorganica Chim Acta 1998. [DOI: 10.1016/s0020-1693(98)00042-5] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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Brandon EJ, Kollmar C, Miller JS. Orbital Overlap and Antiferromagnetic Coupling in Substituted Tetraphenylporphinatomanganate(III) Tetracyanoethenide Based Magnets. The Importance of σ−dz2−pz Overlap. J Am Chem Soc 1998. [DOI: 10.1021/ja973452t] [Citation(s) in RCA: 43] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Erik J. Brandon
- Contribution from the Department of Chemistry, University of Utah, Salt Lake City, Utah 84112-0850, and the Physik Department, Theoretische Physik T38, Technische Universität München, James Franck Strasse, D-85748 Garching, Germany
| | - Christian Kollmar
- Contribution from the Department of Chemistry, University of Utah, Salt Lake City, Utah 84112-0850, and the Physik Department, Theoretische Physik T38, Technische Universität München, James Franck Strasse, D-85748 Garching, Germany
| | - Joel S. Miller
- Contribution from the Department of Chemistry, University of Utah, Salt Lake City, Utah 84112-0850, and the Physik Department, Theoretische Physik T38, Technische Universität München, James Franck Strasse, D-85748 Garching, Germany
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Structure and magnetism of nickel (II) and manganese (II) complexes of a nitronyl nitroxide carboxylic acid. Inorganica Chim Acta 1996. [DOI: 10.1016/0020-1693(95)04996-7] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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Holloway, CE, Melnik, M. Manganese Coordination Compounds: Classification and Analysis of Crystallographic and Structural Data. REV INORG CHEM 1996. [DOI: 10.1515/revic.1996.16.2-3.101] [Citation(s) in RCA: 8] [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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Oshio H, Ohto A, Fujisawa J, Watanabe T, Ito T, Isobe K. Organo-Rhodium Complex with Tridentate Biradical Ligand, [Rh(Cp*)(bisnitpy)](PF6)2. CHEM LETT 1994. [DOI: 10.1246/cl.1994.2353] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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25
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Crystal chemistry of mixed-ligand coordination compounds with stable nitroxide radicals. J STRUCT CHEM+ 1994. [DOI: 10.1007/bf02578291] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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Caneschi A, Ferraro F, Gatteschi D, Melandri MC, Rey P, Sessoli R. Synthese, Struktur und magnetische Eigenschaften eines zweikernigen Mangan(II)-Komplexes mit einer μ-Aqua- und zwei μ-Carboxylato-Brücken. Angew Chem Int Ed Engl 1989. [DOI: 10.1002/ange.19891011024] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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28
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Caneschi A, Ferraro F, Gatteschi D, Melandri MC, Rey P, Sessoli R. Synthesis, Structure and Magnetic Properties of a Dinuclear Manganese(II) Complex with One ?-Aqua and Two ?-Carboxylato Bridges. ACTA ACUST UNITED AC 1989. [DOI: 10.1002/anie.198913651] [Citation(s) in RCA: 55] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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Awaga K, Maruyama Y. Ferromagnetic and antiferromagnetic intermolecular interactions of organic radicals, α‐nitronyl nitroxides. II. J Chem Phys 1989. [DOI: 10.1063/1.456984] [Citation(s) in RCA: 98] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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30
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Gatteschi D, Zanchini C, Kahn O, Pei Y. Single-crystal EPR spectra of the first alternating bimetallic chain compound MnCu(obp)(H2O)3·H2O (obp=oxamido bis(n,n′-propionato)). Chem Phys Lett 1989. [DOI: 10.1016/0009-2614(89)87575-x] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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