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Proton-transfer reactions of Re(II)-nitrosyl complexes: Potentiometric studies, DFT and TD-DFT calculations. RESULTS IN CHEMISTRY 2022. [DOI: 10.1016/j.rechem.2022.100455] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
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Pacheco M, González-Platas J, Julve M, Lloret F, Kremer C, Cuevas A. Crystal structure and magnetic properties of 3,5-pyridinedicarboxylate-bridged Re(II)M(II) heterodinuclear complexes (M = Cu, Ni and Co). Polyhedron 2021. [DOI: 10.1016/j.poly.2021.115414] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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3
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Pacheco M, Alvarez N, Cuevas A, Romerosa A, Lloret F, Kremer C. Crystal structure and magnetic study of the complex salt [RuCp(PTA) 2-μ-CN-1κ C:2κ N-RuCp(PTA) 2][Re(NO)Br 4(EtOH) 0.5(MeOH) 0.5]. Acta Crystallogr E Crystallogr Commun 2021; 77:749-754. [PMID: 34513024 PMCID: PMC8382050 DOI: 10.1107/s2056989021006381] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2021] [Accepted: 06/18/2021] [Indexed: 12/27/2022]
Abstract
A new RuII-ReII complex salt, μ-cyanido-κ2 C:N-bis-[(η5-cyclo-penta-dien-yl)bis(3,5,7-tri-aza-phosphaadamantane-κP)ruthenium(II)] tetra-bromido-(ethanol/methanol-κO)nitrosylrhenate(II), [Ru(CN)(C5H5)2(C6H12N3P)4][ReBr4(NO)(CH4O)0.5(C2H6O)0.5] or [RuCp(PTA)2-μ-CN-1κC:2κ2 N-RuCp(PTA)2][Re(NO)Br4(EtOH)0.5(MeOH)0.5] (PTA = 3,5,7-tri-aza-phosphaadaman-tane) was obtained and characterized by single-crystal X-ray diffraction, elemental analysis and infrared spectroscopy. The title salt was obtained by liquid-liquid diffusion of methanol/DMSO solutions of (NBu4)[Re(NO)Br4(EtOH)] and [(PTA)2CpRu-μ-CN-1κC:2κ2 N-RuCp(PTA)2](CF3SO3). The RuII and ReII independent moieties correspond to a binuclear and mononuclear complex ion, respectively. A deep geometrical parameter analysis was performed, and no significant differences were found with earlier reports containing similar mol-ecules. The magnetic properties were investigated in the temperature range 2.0-300 K, and the complex behaves as a quasi-magnetically isolated spin doublet with weak anti-ferromagnetic inter-actions.
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Affiliation(s)
- Mario Pacheco
- Area Quimica Inorganica, Facultad de Quimica, Universidad de la República, 11800, Montevideo, Uruguay
| | - Natalia Alvarez
- Area Quimica Inorganica, Facultad de Quimica, Universidad de la República, 11800, Montevideo, Uruguay
| | - Alicia Cuevas
- Area Quimica Inorganica, Facultad de Quimica, Universidad de la República, 11800, Montevideo, Uruguay
| | - Antonio Romerosa
- Area de Quimica Inorganica-CIESOL, Universidad de Almeria, 04120 Almeria, Spain
| | - Francesc Lloret
- Instituto de Ciencia Molecular, Universidad de Valencia, C/ Catedratico Jose, Beltran 2, 46980 Paterna, Valencia, Spain
| | - Carlos Kremer
- Area Quimica Inorganica, Facultad de Quimica, Universidad de la República, 11800, Montevideo, Uruguay
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Świtlicka A, Palion-Gazda J, Machura B, Cano J, Lloret F, Julve M. Field-induced slow magnetic relaxation in pseudooctahedral cobalt(ii) complexes with positive axial and large rhombic anisotropy. Dalton Trans 2019; 48:1404-1417. [DOI: 10.1039/c8dt03965h] [Citation(s) in RCA: 30] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The preparation, X-ray crystal structure, spectroscopic and variable-temperature dc and ac magnetic properties of two six-coordinate cobalt(ii) complexes of formula [Co(bim)4(tcm)2] (1) and [Co(bmim)4(tcm)2] (2) are reported.
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Affiliation(s)
- Anna Świtlicka
- Department of Crystallography
- Institute of Chemistry
- University of Silesia
- 40-006 Katowice
- Poland
| | - Joanna Palion-Gazda
- Department of Crystallography
- Institute of Chemistry
- University of Silesia
- 40-006 Katowice
- Poland
| | - Barbara Machura
- Department of Crystallography
- Institute of Chemistry
- University of Silesia
- 40-006 Katowice
- Poland
| | - Joan Cano
- Department of Química Inorgànica/Instituto de Ciencia Molecular (ICMol)
- Facultat de Quimica de la Universitat de València
- 46980 Paterna
- Spain
- Fundació General de la Universitat de València (FGUV)
| | - Francesc Lloret
- Department of Química Inorgànica/Instituto de Ciencia Molecular (ICMol)
- Facultat de Quimica de la Universitat de València
- 46980 Paterna
- Spain
| | - Miguel Julve
- Department of Química Inorgànica/Instituto de Ciencia Molecular (ICMol)
- Facultat de Quimica de la Universitat de València
- 46980 Paterna
- Spain
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Magnetic anisotropy in two- to eight-coordinated transition–metal complexes: Recent developments in molecular magnetism. Coord Chem Rev 2016. [DOI: 10.1016/j.ccr.2015.06.013] [Citation(s) in RCA: 304] [Impact Index Per Article: 38.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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Pacheco M, Cuevas A, González-Platas J, Lloret F, Julve M, Kremer C. The crystal structure and magnetic properties of 3-pyridinecarboxylate-bridged Re(II)M(II) complexes (M = Cu, Ni, Co and Mn). Dalton Trans 2015; 44:11636-48. [PMID: 26042855 DOI: 10.1039/c5dt01321f] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
The novel Re(II) complex NBu4[Re(NO)Br4(Hnic)] (1) and the heterodinuclear compounds [Re(NO)Br4(μ-nic)Ni(dmphen)2]·½CH3CN (2), [Re(NO)Br4(μ-nic)Co(dmphen)2]·½MeOH (3), [Re(NO)Br4(μ-nic)Mn(dmphen)(H2O)2]·dmphen (4), [Re(NO)Br4(μ-nic)Cu(bipy)2] (5) [Re(NO)Br4(μ-nic)Cu(dmphen)2] (5') (NBu4(+) = tetra-n-butylammonium cation, Hnic = 3-pyridinecarboxylic acid, dmphen = 2,9-dimethyl-1,10-phenanthroline, bipy = 2,2'-bipyridine) have been prepared and the structures of 1-5 determined using single crystal X-ray diffraction. The structure of 1 consists of [Re(NO)Br4(Hnic)](-) anions and NBu4(+) cations. Each Re(II) is six-coordinate with four bromide ligands, a linear nitrosyl group and a nitrogen atom from the Hnic molecule, in a distorted octahedral surrounding. The structures of 2-5 are made up of discrete heterodinuclear Re(II)M(II) units where the fully deprotonated [Re(NO)Br4(nic)](2-) entity acts as a didentate ligand through the carboxylate group towards the [Ni(dmphen)2](2+) (2), [Co(dmphen)2](2+) (3), [Mn(dmphen)(H2O)2](2+) (4) and [Cu(bipy)2](2+) (5) fragments, the Re-M separation across the nic bridge being 7.8736(8) (2), 7.9632(10) (3), 7.7600(6) (4) and 8.2148(7) Å (5). The environment of the Re(II) ion in 2-5 is the same as 1 that in and all M(II) are six-coordinate in highly distorted octahedral surroundings, the main source of the distortion being due to the reduced bite of the chelating carboxylate. The magnetic properties of 1-5' were investigated in the temperature range 1.9-300 K. 1 behaves as a quasi-magnetically isolated spin doublet with very weak antiferromagnetic interactions through space Br···Br contacts. Its magnetic susceptibility data were successfully modeled through a deep analysis of the influence of the ligand field, spin-orbit coupling, tetragonal distortion and covalence effects as variable parameters. Compounds 2-5' exhibit weak antiferromagnetic interactions. The intramolecular exchange pathway in this family being discarded because of the symmetry of magnetic orbitals of the Re(II) ion (d(xy)) precludes any spin delocalization on the bridging nic orbitals, the observed magnetic interactions are most likely mediated by π-π type interactions between the peripheral ligands which occur in them. Only in the case of 4, short through space Br···Br contacts of ca. 4.03 Å (values larger than 5.5 Å in 2, 3 and 5) could be involved in the exchange coupling.
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Affiliation(s)
- Mario Pacheco
- Cátedra de Química Inorgánica, Departamento Estrella Campos, Facultad de Química, Universidad de la República, Avda. General Flores 2124, Montevideo, Uruguay
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Abramov PA, Gritsan NP, Suturina EA, Bogomyakov AS, Sokolov MN. Rhenium Complex with Noninnocent Dioxolene Ligand: Combined Experimental and ab Initio Study of [(3,5-di-tert-Bu2C6H2O2)ReCl3(OPPh3)]. Inorg Chem 2015; 54:6727-35. [PMID: 26135029 DOI: 10.1021/acs.inorgchem.5b00407] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Reaction of [ReOCl3(PPh3)2] with 3,5-di-tert-butyl-1,2-benzoquinone (3,5-DTBQ) in hot toluene produces a new complex [(3,5-di-tert-Bu2C6H2O2)Re(OPPh3)Cl3] (1), which was isolated and characterized by elemental analysis, IR, UV-vis spectroscopy, and cyclic voltammetry. In order to clarify the charge state of rhenium and the coordinated dioxolene ligand, X-ray experiments at 150 and 290 K were carried out. The C-O, C-C, and Re-O bond distances at both 150 and 290 K fall between those for semiquinolate (3,5-DTBSQ) and catecholate (3,5-DTBCat) forms; an empirical "metrical oxidation state" of the dioxolene ligand was estimated to be -1.5. High-level ab initio calculations (SOC-CASSCF/NEVPT2) revealed a mixed valence nature of the triplet ground state of complex 1 corresponding to a superposition of the Re(IV)-SQ and Re(V)-cat forms. In agreement with the high-level ab initio and DFT calculations, the temperature dependence of the magnetic susceptibility (5-300 K) is well described in the assumption of the triplet ground state, with the anomalously large zero-field splitting (ZFS) arising from the spin-orbit coupling. According to the ab initio calculations, all absorption bands in the visible region of the electronic absorptions spectrum are assigned to the LMCT bands, with significant contribution of the intraligand transition in the most intense band at 555 nm.
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Affiliation(s)
- Pavel A Abramov
- †Nikolayev Institute of Inorganic Chemistry, Prospekt Lavrentyeva 3, 630090 Novosibirsk, Russia.,‡Novosibirsk State University, Pirogova str. 2, 630090 Novosibirsk, Russia
| | - Nina P Gritsan
- ‡Novosibirsk State University, Pirogova str. 2, 630090 Novosibirsk, Russia.,§Voevodsky Institute of Chemical Kinetics and Combustion, Institutskaya str. 3, 630090 Novosibirsk, Russia
| | - Elizaveta A Suturina
- ‡Novosibirsk State University, Pirogova str. 2, 630090 Novosibirsk, Russia.,§Voevodsky Institute of Chemical Kinetics and Combustion, Institutskaya str. 3, 630090 Novosibirsk, Russia
| | - Artem S Bogomyakov
- ‡Novosibirsk State University, Pirogova str. 2, 630090 Novosibirsk, Russia.,∥International Tomography Center, Institutskaya str. 3a, 630090 Novosibirsk, Russia
| | - Maxim N Sokolov
- †Nikolayev Institute of Inorganic Chemistry, Prospekt Lavrentyeva 3, 630090 Novosibirsk, Russia.,‡Novosibirsk State University, Pirogova str. 2, 630090 Novosibirsk, Russia
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Armentano D, Martínez-Lillo J. Aquapentachlororhenate(iv): a singular and promising building block for metal assembly. RSC Adv 2015. [DOI: 10.1039/c5ra10225a] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
The novel ReIV compound of formula PPh4[ReIVCl5(H2O)] (1) is the first example of a ReIV compound containing a coordinated water molecule which has been magnetostructurally studied.
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Affiliation(s)
- Donatella Armentano
- Centro di Eccellenza CEMIF.CAL
- Dipartimento di Chimica e Tecnologie Chimiche
- Università della Calabria
- CS
- Italy
| | - José Martínez-Lillo
- Instituto de Ciencia Molecular
- Facultad de Química de la Universidad de Valencia
- Valencia
- Spain
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Pacheco M, Cuevas A, González-Platas J, Gancheff JS, Kremer C. Complex salts of [Re II(NO)Br 4(pyz)] −: synthesis, crystal structures, and DFT studies. J COORD CHEM 2014. [DOI: 10.1080/00958972.2014.959003] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
Affiliation(s)
- Mario Pacheco
- Cátedra de Química Inorgánica, Facultad de Química, Departamento Estrella Campos, Universidad de la República, Montevideo, Uruguay
| | - Alicia Cuevas
- Cátedra de Química Inorgánica, Facultad de Química, Departamento Estrella Campos, Universidad de la República, Montevideo, Uruguay
| | - Javier González-Platas
- Departamento de Física, Servicio de Difracción de Rayos X. Universidad de La Laguna, Tenerife, Spain
| | - Jorge S. Gancheff
- Cátedra de Química Inorgánica, Facultad de Química, Departamento Estrella Campos, Universidad de la República, Montevideo, Uruguay
| | - Carlos Kremer
- Cátedra de Química Inorgánica, Facultad de Química, Departamento Estrella Campos, Universidad de la República, Montevideo, Uruguay
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