Copper complexes from 3,5-disubstituted N-hydroxyethylpyrazole ligands: Cleavage of C[sbnd]N bond as well as formation of second coordination sphere complexes
| Autor: | Josefina Pons, José Giner Planas, Teresa Calvet, Mercè Font-Bardia, Joan Soldevila-Sanmartín |
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| Přispěvatelé: | La Caixa, Generalitat de Catalunya, Ministerio de Economía y Competitividad (España), Ministerio de Ciencia, Innovación y Universidades (España) |
| Jazyk: | angličtina |
| Rok vydání: | 2022 |
| Předmět: |
Coordination sphere
Chemistry Ionic bonding chemistry.chemical_element Crystal structure Cleavage (embryo) Copper Magnetic susceptibility Inorganic Chemistry chemistry.chemical_compound Crystallography Pyrazole ligands Monomer Magnetic properties Materials Chemistry N O-hybrid ligands Physical and Theoretical Chemistry Cu(II) complexes Bond cleavage |
| Zdroj: | Digital.CSIC. Repositorio Institucional del CSIC instname |
| Popis: | The coordination behaviour of two N,O-hybrid hydroxyethylpyrazole ligands, 2-(3,5-diphenyl-1H-pyrazol-1-yl)ethanol, HL1; and (2-(3,5-di(2-pyridyl)-1H-pyrazol-1-yl)ethanol, HL2; with CuCl2·2H2O and Cu(NO3)2·3H2O were studied. Four copper complexes: [CuCl(µ-L1)]2·HL1 (1), [CuCl2(HL2)]·H2O (2A), [Cu(NO3)(3,5-hdppz)(µ-L1)]2·2CH3CN (3), (3,5-hdppz = 3,5-diphenylpyrazole) and [Cu(H2O)(3,5-dpypz)]2(NO3)2·H2O (4), (3,5-dpypz = 3,5-(2-pyridyl)pyrazolate) were isolated and characterized by analytical methods and spectroscopical studies. From their crystal structure, a Npz-C bond cleavage was observed for HL1 and HL2 upon reaction with Cu(NO3)2·3H2O, yielding the unexpected complexes 3 and 4, respectively. Overall, these complexes provided great structural diversity, as dimers (asymmetric and symmetric), monomers and ionic complexes were obtained. Finally, magnetic susceptibility measurements for 3 were carried out, showing the dependence of the magnetic moment on Cu-O-Cu angles. J.P. thanks CB615921 project, the CB616406 project from “Fundació La Caixa” and the Generalitat de Catalunya (2017/SGR/1687). T.C. thanks the Spanish National Plan of Research MAT2015-65756R. J.G.P. thanks MINECO (PID2019-106832RB-I00), MICINN through the Severo Ochoa Program for Centers of Excellence for the FUNFUTURE (CEX2019-000917-S and MDM-2017-0767 projects) and the Generalitat de Catalunya (2017/SGR/1720 and SGR2017-1289). J.S. also acknowledges the PIF pre-doctoral Fellowship from the Universitat Autònoma de Barcelona for his pre-doctoral grant. With funding from the Spanish government through the ‘Severo Ochoa Centre of Excellence’ accreditation (CEX2019-000917-S). |
| Databáze: | OpenAIRE |
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