1
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Maxim C, Saureu S, de Graaf C, Ferlay S, Hosseini MW, Robert V, Train C. Amidinium‐Containing 2D [MnCr] Dimetallic Oxalate‐Based Networks – The Influence on Structure and Magnetism Explored by Combining Experience and Theory. Eur J Inorg Chem 2016. [DOI: 10.1002/ejic.201600514] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Catalin Maxim
- Molecular Tectonic Laboratory UMR UDS‐CNRS 7140 Université de Strasbourg Institut Le Bel 4, rue Blaise Pascal 67000 Strasbourg France
- Laboratoire National des Champs Magnétiques Intenses UPR CNRS 3228 25 rue des Martyrs, B.P. 166 38042 Grenoble cedex 9 France
- University of Bucharest Faculty of Chemistry Inorganic Chemistry Laboratory Str. Dumbrava Rosie nr. 23 020464 Bucharest Romania
| | - Sergi Saureu
- Laboratoire de Chimie Quantique UMR 7177 1 rue Blaise Pascal 67000 Strasbourg France
- Departament de Química Física i Inorgànica Universitat Rovira i Virgili Marcel·lí Domingo s/n 43007 Tarragona Spain
| | - Coen de Graaf
- Departament de Química Física i Inorgànica Universitat Rovira i Virgili Marcel·lí Domingo s/n 43007 Tarragona Spain
- Institució Catalana de Recerca i Estudis Avançats (ICREA) Passeig Lluís Companys 23 08010 Barcelona Spain
| | - Sylvie Ferlay
- Molecular Tectonic Laboratory UMR UDS‐CNRS 7140 Université de Strasbourg Institut Le Bel 4, rue Blaise Pascal 67000 Strasbourg France
- Institut Universitaire de France (IUF) France
| | - Mir Wais Hosseini
- Molecular Tectonic Laboratory UMR UDS‐CNRS 7140 Université de Strasbourg Institut Le Bel 4, rue Blaise Pascal 67000 Strasbourg France
- Institut Universitaire de France (IUF) France
| | - Vincent Robert
- Laboratoire de Chimie Quantique UMR 7177 1 rue Blaise Pascal 67000 Strasbourg France
| | - Cyrille Train
- Laboratoire National des Champs Magnétiques Intenses UPR CNRS 3228 25 rue des Martyrs, B.P. 166 38042 Grenoble cedex 9 France
- Institut Universitaire de France (IUF) France
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2
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Layered vanadyl (IV) nitroprusside: Magnetic interaction through a network of hydrogen bonds. J SOLID STATE CHEM 2016. [DOI: 10.1016/j.jssc.2016.04.025] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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3
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Ozarowski A, Calzado CJ, Sharma RP, Kumar S, Jezierska J, Angeli C, Spizzo F, Ferretti V. Metal–Metal Interactions in Trinuclear Copper(II) Complexes [Cu3(RCOO)4(H2TEA)2] and Binuclear [Cu2(RCOO)2(H2TEA)2]. Syntheses and Combined Structural, Magnetic, High-Field Electron Paramagnetic Resonance, and Theoretical Studies. Inorg Chem 2015; 54:11916-34. [DOI: 10.1021/acs.inorgchem.5b02199] [Citation(s) in RCA: 46] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Andrew Ozarowski
- National High Magnetic Field Laboratory, Florida State University, Tallahassee, Florida 32310, United States
| | - Carmen J. Calzado
- Departamento de Química Física, Universidad de Sevilla, c/Prof. García González, s/n, 41012 Sevilla, Spain
| | - Raj Pal Sharma
- Department of Chemistry, Panjab University, Chandigarh 160014, India
| | - Santosh Kumar
- Department of Chemistry, Panjab University, Chandigarh 160014, India
| | - Julia Jezierska
- Faculty of Chemistry, Wroclaw University, 14 F. Joliot Curie Str., 50-383 Wroclaw, Poland
| | | | - Federico Spizzo
- Dipartimento di Fisica e Scienze della Terra, Università di Ferrara, Via Saragat 1, I-44122 Ferrara, Italy
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4
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Herchel R, Nemec I, Machata M, Trávníček Z. Experimental and Theoretical Investigations of Magnetic Exchange Pathways in Structurally Diverse Iron(III) Schiff-Base Complexes. Inorg Chem 2015; 54:8625-38. [DOI: 10.1021/acs.inorgchem.5b01271] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Radovan Herchel
- Regional Centre of Advanced Technologies and Materials,
Department of Inorganic Chemistry, Faculty of Science, Palacký University, 17. listopadu 12, CZ-771 46 Olomouc, Czech Republic
| | - Ivan Nemec
- Regional Centre of Advanced Technologies and Materials,
Department of Inorganic Chemistry, Faculty of Science, Palacký University, 17. listopadu 12, CZ-771 46 Olomouc, Czech Republic
| | - Marek Machata
- Regional Centre of Advanced Technologies and Materials,
Department of Inorganic Chemistry, Faculty of Science, Palacký University, 17. listopadu 12, CZ-771 46 Olomouc, Czech Republic
| | - Zdeněk Trávníček
- Regional Centre of Advanced Technologies and Materials,
Department of Inorganic Chemistry, Faculty of Science, Palacký University, 17. listopadu 12, CZ-771 46 Olomouc, Czech Republic
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5
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Jung J, Guennic BL, Fedin MV, Ovcharenko VI, Calzado CJ. Mechanism of Magnetostructural Transitions in Copper-Nitroxide-Based Switchable Molecular Magnets: Insights from ab Initio Quantum Chemistry Calculations. Inorg Chem 2015; 54:6891-9. [PMID: 26125503 DOI: 10.1021/acs.inorgchem.5b00794] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The gradual magnetostructural transition in breathing crystals based on copper(II) and pyrazolyl-substituted nitronyl nitroxides has been analyzed by means of DDCI quantum chemistry calculations. The magnetic coupling constants (J) within the spin triads of Cu(hfac)2L(Bu)·0.5C8H18 have been evaluated for the X-ray structures reported at different temperatures. The coupling is strongly antiferromagnetic at low temperature and becomes ferromagnetic when the temperature increases. The intercluster magnetic coupling (J') is antiferromagnetic and shows a marked dependence on temperature. The magnetostructural transition can be reproduced using the calculated J values for each structure in the simulation of the magnetic susceptibility. However, the μ(T) curve can be improved nicely by considering the coexistence of two phases in the transition region, whose ratio varies with temperature corresponding to both the weakly and strongly coupled spin states. These results complement a recent VT-FTIR study on the parent Cu(hfac)2L(Pr) compound with a gradual magnetostructural transition.
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Affiliation(s)
- Julie Jung
- †Departamento de Química Física, Universidad de Sevilla, Sevilla, Spain.,‡Institut des Sciences Chimiques de Rennes, UMR 6226 CNRS, Université de Rennes 1, 263 Avenue du Général Leclerc, 35042 Cedex Rennes, France
| | - Boris Le Guennic
- ‡Institut des Sciences Chimiques de Rennes, UMR 6226 CNRS, Université de Rennes 1, 263 Avenue du Général Leclerc, 35042 Cedex Rennes, France
| | - Matvey V Fedin
- §International Tomography Center, Siberian Branch of Russian Academy of Science and Novosibirsk State University, 630090 Novosibirsk, Russia
| | - Victor I Ovcharenko
- §International Tomography Center, Siberian Branch of Russian Academy of Science and Novosibirsk State University, 630090 Novosibirsk, Russia
| | - Carmen J Calzado
- †Departamento de Química Física, Universidad de Sevilla, Sevilla, Spain
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6
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Novoa N, Justaud F, Hamon P, Roisnel T, Cador O, Le Guennic B, Manzur C, Carrillo D, Hamon JR. Doubly phenoxide-bridged binuclear copper(II) complexes with ono tridentate schiff base ligand: Synthesis, structural, magnetic and theoretical studies. Polyhedron 2015. [DOI: 10.1016/j.poly.2014.05.032] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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7
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Krah T, Ben Amor N, Maynau D, Berger JA, Robert V. A rational reduction of CI expansions: combining localized molecular orbitals and selected charge excitations. J Mol Model 2014; 20:2240. [PMID: 24935105 DOI: 10.1007/s00894-014-2240-6] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2013] [Accepted: 04/07/2014] [Indexed: 11/26/2022]
Abstract
Based on localized molecular orbitals, the proposed method reduces large configuration interaction (CI) spaces while maintaining agreement with reference values. Our strategy concentrates the numerical effort on physically pertinent CI-contributions and is to be considered as a tool to tackle large systems including numerous open-shells. To show the efficiency of our method we consider two 4-electron parent systems. First, we illustrate our approach by describing the van der Waals interactions in the (H2)2 system. By systematically including local correlation, dispersion and charge transfer mechanisms, we show that 90% of the reference full CI dissociation energy of the H2 dimer is reproduced using only 3% of the full CI space. Second, the conformational cis/trans rotation barrier of the butadiene molecule is remarkably reproduced (97% of the reference value) with less than 1% of the reference space. This work paves the way to numerical strategies which afford the electronic structure determination of large open-shell systems avoiding the exponential limitation. At the same time, a physical analysis of the contents of the wave function is offered.
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Affiliation(s)
- Tim Krah
- Laboratoire de Chimie Quantique, Université de Strasbourg, 1 rue Blaise Pascal, 67000, Strasbourg, France,
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8
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Dylong A, Sowa M, Goldeman W, Ślepokura K, Duczmal M, Wojciechowska A, Matczak-Jon E. Imidazo[1,2-a]pyridin-2-ylacetic acid and two pairs of isomorphous ML2(H2O)2 dihydrates (M=Ni, Co and Mn, Cd) based on its anion: Syntheses, crystal structures and properties. Polyhedron 2014. [DOI: 10.1016/j.poly.2014.03.004] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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9
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Nemec I, Herchel R, Šilha T, Trávníček Z. Towards a better understanding of magnetic exchange mediated by hydrogen bonds in Mn(iii)/Fe(iii) salen-type supramolecular dimers. Dalton Trans 2014; 43:15602-16. [DOI: 10.1039/c4dt02025a] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Detailed investigations of the magnetic coupling and magnetic anisotropy in a series of Schiff base salen-type Fe(iii) and Mn(iii) complexes, based on SQUID experiments and DFT calculations, are reported.
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Affiliation(s)
- Ivan Nemec
- Regional Centre of Advanced Technologies and Materials & Department of Inorganic Chemistry
- Faculty of Science
- Palacký University
- Olomouc, Czech Republic
| | - Radovan Herchel
- Regional Centre of Advanced Technologies and Materials & Department of Inorganic Chemistry
- Faculty of Science
- Palacký University
- Olomouc, Czech Republic
| | - Tomáš Šilha
- Regional Centre of Advanced Technologies and Materials & Department of Inorganic Chemistry
- Faculty of Science
- Palacký University
- Olomouc, Czech Republic
| | - Zdeněk Trávníček
- Regional Centre of Advanced Technologies and Materials & Department of Inorganic Chemistry
- Faculty of Science
- Palacký University
- Olomouc, Czech Republic
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10
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Wojciechowska A, Gągor A, Jezierska J, Duczmal M. Structural, spectroscopic and magnetic properties of a novel copper(ii)l-tyrosinato complex. RSC Adv 2014. [DOI: 10.1039/c4ra10717a] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Anl-tyrosinato copper(ii) ion complex of formula [Cu(l-Tyr)2(H2O)]·H2O (1) (l-Tyr =l-tyrosine) was characterized by X-ray and spectroscopic (FT-IR, FT-Raman, NIR-vis-UV, and EPR) and magnetic methods.
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Affiliation(s)
| | - Anna Gągor
- Institute of Low Temperature and Structure Research Polish Academy of Sciences
- 50-422 Wrocław, Poland
| | - Julia Jezierska
- Faculty of Chemistry
- University of Wrocław
- 50-383 Wrocław, Poland
| | - Marek Duczmal
- Faculty of Chemistry
- Wrocław University of Technology
- 50-370 Wrocław, Poland
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11
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Zhang Y, Yang Y, Jiang H. 3d–4f Magnetic Interaction with Density Functional Theory Plus U Approach: Local Coulomb Correlation and Exchange Pathways. J Phys Chem A 2013; 117:13194-204. [DOI: 10.1021/jp4103228] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Affiliation(s)
- Yachao Zhang
- Beijing
National Laboratory
of Molecular Sciences, State Key Laboratory of Rare Earth Materials
Chemistry and Applications, College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, China
| | - Yang Yang
- Beijing
National Laboratory
of Molecular Sciences, State Key Laboratory of Rare Earth Materials
Chemistry and Applications, College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, China
| | - Hong Jiang
- Beijing
National Laboratory
of Molecular Sciences, State Key Laboratory of Rare Earth Materials
Chemistry and Applications, College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, China
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12
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Kurc T, Videnova-Adrabinska V, Turowska-Tyrk I, Duczmal M, Jerzykiewicz M. Synthesis, crystal structure and magnetic properties of a novel copper(II) complex with sulfoisophthalic acid. J Mol Struct 2013. [DOI: 10.1016/j.molstruc.2013.08.059] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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13
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Malrieu JP, Caballol R, Calzado CJ, de Graaf C, Guihéry N. Magnetic interactions in molecules and highly correlated materials: physical content, analytical derivation, and rigorous extraction of magnetic Hamiltonians. Chem Rev 2013; 114:429-92. [PMID: 24102410 DOI: 10.1021/cr300500z] [Citation(s) in RCA: 280] [Impact Index Per Article: 25.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Affiliation(s)
- Jean Paul Malrieu
- Laboratoire de Chimie et Physique Quantiques, Université de Toulouse 3 , 118 route de Narbonne, 31062 Toulouse, France
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14
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Bandeira NAG, Maynau D, Robert V, Le Guennic B. Do π–π Stacking Interactions Really Play a Role in the Magnetic Coupling Mechanisms of [Cu2(μ2-CH3COO)2L2(H2O)2]n+ (L = heterocyclic base, n = 0, 2) Complexes? An ab initio Inspection. Inorg Chem 2013; 52:7980-6. [DOI: 10.1021/ic400517z] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Nuno A. G. Bandeira
- C8−Fac. Ciências, University de Lisboa, Campo Grande, 1749-016 Lisbon,
Portugal
- Laboratoire de Chimie, UMR CNRS 5182, Ecole Normale Supérieure de Lyon, 46 allée
d’Italie, 69364 Lyon cedex 07, France
| | - Daniel Maynau
- Université de Toulouse, UPS, LCPQ (Laboratoire de Chimie et Physique
Quantiques), IRSAMC, 118 route de Narbonne, 31062 Toulouse cedex,
France
| | - Vincent Robert
- Laboratoire de Chimie
Quantique, Institut de Chimie UMR 7177, CNRS and Université de Strasbourg, 4 rue Blaise Pascal, Strasbourg 67070,
France
- Laboratoire de Chimie, UMR CNRS 5182, Ecole Normale Supérieure de Lyon, 46 allée
d’Italie, 69364 Lyon cedex 07, France
| | - Boris Le Guennic
- Institut des Sciences
Chimiques de Rennes, Université de Rennes 1, CNRS 6226, 35042, Rennes Cedex, France
- Laboratoire de Chimie, UMR CNRS 5182, Ecole Normale Supérieure de Lyon, 46 allée
d’Italie, 69364 Lyon cedex 07, France
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15
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Wojciechowska A, Gągor A, Duczmal M, Staszak Z, Ozarowski A. l-Tyrosinatonickel(II) Complex: Synthesis and Structural, Spectroscopic, Magnetic, and Biological Properties of 2{[Ni(l-Tyr)2(bpy)]}·3H2O·CH3OH. Inorg Chem 2013; 52:4360-71. [DOI: 10.1021/ic3024919] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
| | - Anna Gągor
- Institute
of Low Temperature and Structure Research, Polish Academy of Sciences, Okólna 2, 50-422
Wrocław, Poland
| | | | | | - Andrzej Ozarowski
- National
High Magnetic Field Laboratory, Florida State University, 1800 East Paul Dirac Drive, Tallahassee, Florida 32310, United
States
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16
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Domingo A, Vérot M, Mota F, de Graaf C, Novoa JJ, Robert V. Impact of short and long-range effects on the magnetic interactions in neutral organic radical-based materials. Phys Chem Chem Phys 2013; 15:6982-9. [DOI: 10.1039/c3cp44647f] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
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17
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18
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Biswas R, Giri S, Saha SK, Ghosh A. One Ferromagnetic and Two Antiferromagnetic Dinuclear Nickel(II) Complexes Derived from a Tridentate N,N,O-Donor Schiff Base Ligand: A Density Functional Study of Magnetic Coupling. Eur J Inorg Chem 2012. [DOI: 10.1002/ejic.201200028] [Citation(s) in RCA: 49] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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19
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Bandeira NAG, Guennic BL. Calculation of Magnetic Couplings in Hydrogen-Bonded Cu(II) Complexes Using Density Functional Theory. J Phys Chem A 2012; 116:3465-73. [DOI: 10.1021/jp300618v] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Nuno A G Bandeira
- Université de Lyon, CNRS, Institut de Chimie de Lyon, Ecole Normale Supérieure de Lyon, France
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20
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Kozlevčar B, Kitanovski N, Jagličić Z, Bandeira NAG, Robert V, Le Guennic B, Gamez P. Cis-trans isomeric and polymorphic effects on the magnetic properties of water-bridged copper coordination chains. Inorg Chem 2012; 51:3094-102. [PMID: 22356607 DOI: 10.1021/ic202568y] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The synthesis and magnetic characterization of vanillin-based Cu(II) mononuclear complexes of formula [Cu(van)(2)(H(2)O)(2)](H(2)O)(x) (van = vanillinate; x = 0, compound 1; x = 2, compounds 2 and 3) were performed. Despite the presence of very similar [Cu(van)(2)(H(2)O)(2)] moieties, the crystal structures exhibit distinct Cu···Cu contacts and display three different through-H-bond exchange-coupling pathways. As a result of the relative positions of the water molecules, the experimental (MAGSUS) exchange-coupling constants are dissimilar, i.e., J(1) = -3.0 cm(-1) (the data have been fitted to the Bleaney-Bowers equation considering a dimer; 2J = -6.0 cm(-1)), J(2) = -4.0 cm(-1) (the data have been fitted to the Bonner-Fischer equation for a chain of monomeric copper(II) units), whereas compound 3 is paramagnetic. Subsequently, the theoretical density functional theory (DFT) and wave function theory-based (DDCI) calculations were carried out to better understand the role of the water molecule as a mediator of the magnetic coupling. The use of localized orbitals allows one to elucidate the role of the H-bonds in generating exchange interactions. Since the exchange-coupling constants are strongly dependent on the mechanisms selectively introduced, the role of the H-bond is demonstrated.
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Affiliation(s)
- Bojan Kozlevčar
- Fakulteta za kemijo in kemijsko tehnologijo, Univerza v Ljubljani, Aškerčeva c. 5, 1000 Ljubljana, Slovenia.
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21
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Tommasino JB, Chastanet G, Guennic BL, Robert V, Pilet G. A 1D coordination polymer built on asymmetric μ1,1,3-azide bridge: from unusual topology to magnetic properties and Cu(ii)/Cu(i) redox reversibility. NEW J CHEM 2012. [DOI: 10.1039/c2nj40302a] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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22
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Dobrzyńska D, Jerzykiewicz LB, Duczmal M, Wojciechowska A. Synthesis, structure, magnetic and spectroscopic properties of chromium(III) complex with quinoline-2-carboxylate ion. Polyhedron 2011. [DOI: 10.1016/j.poly.2011.07.018] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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23
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Zhang Y, Jiang H. Intra- and Interatomic Spin Interactions by the Density Functional Theory plus U Approach: A Critical Assessment. J Chem Theory Comput 2011; 7:2795-803. [DOI: 10.1021/ct200299s] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- Yachao Zhang
- Beijing National Laboratory of Molecular Sciences, State Key Laboratory of Rare Earth Materials Chemistry and Applications, College of Chemistry and Molecular Engineering, Peking University, Beijing, 100871, China
| | - Hong Jiang
- Beijing National Laboratory of Molecular Sciences, State Key Laboratory of Rare Earth Materials Chemistry and Applications, College of Chemistry and Molecular Engineering, Peking University, Beijing, 100871, China
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24
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Costa JS, Bandeira NAG, Le Guennic B, Robert V, Gamez P, Chastanet G, Ortiz-Frade L, Gasque L. Coexistence of intramolecular ligand-mediated and through hydrogen-bond magnetic interactions in a chain of dicopper(II) units. Inorg Chem 2011; 50:5696-705. [PMID: 21618977 DOI: 10.1021/ic200480d] [Citation(s) in RCA: 40] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The reaction of 2,8-dimethyl-5,11-bis(pyridin-2-ylmethyl)-1,4,5,6,7,10,11,12-octahydroimidazo[4,5-h]imidazo[4,5-c][1,6]-diazecine (dimp) with copper(II) nitrate in water produces the compound [Cu(2)(dimp)(H(2)O)(2)(NO(3))(2)](NO(3))(2). The single-crystal X-ray structure shows the formation of hydrogen-bonded chains in the lattice that are formed by dicopper(II) units doubly connected by nitrate/water bridges. Within the one-dimensional chains, the Cu ions are separated by either intramolecular or intermolecular distances of 7.309(2) Å or 6.255(2) Å, respectively. The magnetic susceptibility data revealing weak antiferromagnetic exchange interactions between the copper(II) ions were interpreted by considering two possible models, namely, an isolated dinuclear and a 1-D chain picture. The latter leads to an alternation J(1) = -11.6 and J(2) = -3.0 cm(-1) along the chain. In order to clarify the relative strengths of the exchange couplings through hydrogen bonds and via the bridging dimp ligand, solution EPR studies and quantum chemical calculations were carried out. EPR studies unambiguously conclude on the existence of an exchange interaction J(a) mediated by the dinucleating dimp ligand, while the through-H coupling J(b) is physically absent in solution. On the basis of dinuclear units extracted from the X-ray data, J(a) was estimated around -5.0 cm(-1) from DFT-based calculations (M06 functional), whereas J(b) is negligible. In contrast, wave function configuration interaction calculations (DDCI) support a description where both inter- and intramolecular pathways coexist with a preeminent role of H bonds with J(a) = -2.8 and J(b) = -10.4 cm(-1). Not only are these values very consistent with the extracted set of parameters (J(1), J(2) = -11.6, -3.0 cm(-1)) but the possibility to generate leading exchange coupling through weak bonds is evidenced by means of wave function-based calculations.
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Affiliation(s)
- José Sánchez Costa
- Departament de Química Inorgànica, Universitat de Barcelona, Martí i Franquès 1-11, 08028 Barcelona, Spain
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25
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Ma Y, Bandeira NAG, Robert V, Gao EQ. Experimental and Theoretical Studies on the Magnetic Properties of Manganese(II) Compounds with Mixed Isocyanate and Carboxylate Bridges. Chemistry 2011; 17:1988-98. [DOI: 10.1002/chem.201002243] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2010] [Indexed: 11/09/2022]
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26
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Vérot M, Rota JB, Kepenekian M, Guennic BL, Robert V. Magnetic and conduction properties in 1D organic radical materials: an ab initio inspection for a challenging quest. Phys Chem Chem Phys 2011; 13:6657-61. [DOI: 10.1039/c0cp02124e] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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27
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Rota JB, Calzado CJ, Train C, Robert V. Microscopic origins of the ferromagnetic exchange coupling in oxoverdazyl-based Cu(II) complex. J Chem Phys 2010; 132:154702. [DOI: 10.1063/1.3378023] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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