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Abstract:

The title mononuclear CoII complex, [Co(C5H7N6)2(C14H8O5)2(H2O)2]·2H2O, has been synthesized and its crystal structure determined by X-ray diffraction. The complex crystallizes in the triclinic space group P, with one formula unit per cell (Z = 1 and Z′ =). It consists of a mononuclear unit with the CoII ion on an inversion centre coordinated by two 2,6-diamino-7H-purin-1-ium cations, two 4,4′-oxydibenzoate anions (in a nonbridging κO-monodentate coordination mode, which is less common for the anion in its CoII complexes) and two water molecules, defining an octahedral environment around the metal atom. There is a rich assortment of nonbonding interactions, among which a strong N+ - H···O- bridge, with a short N···O distance of 2.5272 (18) Å, stands out, with the H atom ostensibly displaced away from its expected position at the donor side, towards the acceptor. The complex molecules assemble into a three-dimensional hydrogen-bonded network. A variable-temperature magnetic study between 2 and 300 K reveals an orbital contribution to the magnetic moment and a weak antiferromagnetic interaction between CoII centres as the temperature decreases. The model leads to the following values: A (crystal field strength) = 1.81, λ (spin-orbit coupling) = -59.9 cm-1, g (Landé factor) = 2.58 and zJ (exchange coupling) = -0.5 cm-1. © 2018 International Union of Crystallography.

Registro:

Documento: Artículo
Título:Synthesis, crystal structure and magnetic properties of diaquabis(2,6-diamino-7H-purin-1-ium-κN9)bis(4,4′-oxydibenzoato-κO)cobalt(II) dihydrate
Autor:Atria, A.M.; Parada, J.; Moreno, Y.; Suárez, S.; Baggio, R.; Peña, O.
Filiación:Facultad de Ciencias Químicas y Farmacéuticas, Universidad de Chile, Santiago, Chile
Departamento de Ciencias Químicas, CP2520000, Facultad de Ciencias Exactas, Universidad Andrés Bello, Viña del Mar, Chile
Departamento de Química Inorgánica, Analítica y Química, Física/INQUIMAE-CONICET, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Buenos Aires, Argentina
Gerencia de Investigación y Aplicaciones, Centro Atómico Constituyentes, Comisión Nacional de Energía Atómica, Buenos Aires, Argentina
Institut des Sciences Chimiques de Rennes, Université de Rennes 1, Rennes, France
Palabras clave:AIM; antiferromagnetic interaction; cobalt complex; computational chemistry; crystal structure; magnetism; temperature dependence; Antiferroelectricity; Antiferromagnetism; Cobalt; Complex networks; Computational chemistry; Coordination reactions; Hydrogen bonds; Ions; Magnetic moments; Magnetism; Molecules; Negative ions; Single crystals; Temperature distribution; X ray diffraction; Antiferro-magnetic interactions; Cobalt complexes; Crystal field strength; Hydrogen bonded network; Monodentate coordination; Non-bonding interactions; Octahedral environment; Temperature dependence; Crystal structure
Año:2018
Volumen:74
Número:1
Página de inicio:37
Página de fin:44
DOI: http://dx.doi.org/10.1107/S2053229617016916
Título revista:Acta Crystallographica Section C: Structural Chemistry
Título revista abreviado:Acta crystallogr., C Struct. Chem.
ISSN:20532296
CODEN:ACSCG
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_20532296_v74_n1_p37_Atria

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Citas:

---------- APA ----------
Atria, A.M., Parada, J., Moreno, Y., Suárez, S., Baggio, R. & Peña, O. (2018) . Synthesis, crystal structure and magnetic properties of diaquabis(2,6-diamino-7H-purin-1-ium-κN9)bis(4,4′-oxydibenzoato-κO)cobalt(II) dihydrate. Acta Crystallographica Section C: Structural Chemistry, 74(1), 37-44.
http://dx.doi.org/10.1107/S2053229617016916
---------- CHICAGO ----------
Atria, A.M., Parada, J., Moreno, Y., Suárez, S., Baggio, R., Peña, O. "Synthesis, crystal structure and magnetic properties of diaquabis(2,6-diamino-7H-purin-1-ium-κN9)bis(4,4′-oxydibenzoato-κO)cobalt(II) dihydrate" . Acta Crystallographica Section C: Structural Chemistry 74, no. 1 (2018) : 37-44.
http://dx.doi.org/10.1107/S2053229617016916
---------- MLA ----------
Atria, A.M., Parada, J., Moreno, Y., Suárez, S., Baggio, R., Peña, O. "Synthesis, crystal structure and magnetic properties of diaquabis(2,6-diamino-7H-purin-1-ium-κN9)bis(4,4′-oxydibenzoato-κO)cobalt(II) dihydrate" . Acta Crystallographica Section C: Structural Chemistry, vol. 74, no. 1, 2018, pp. 37-44.
http://dx.doi.org/10.1107/S2053229617016916
---------- VANCOUVER ----------
Atria, A.M., Parada, J., Moreno, Y., Suárez, S., Baggio, R., Peña, O. Synthesis, crystal structure and magnetic properties of diaquabis(2,6-diamino-7H-purin-1-ium-κN9)bis(4,4′-oxydibenzoato-κO)cobalt(II) dihydrate. Acta crystallogr., C Struct. Chem. 2018;74(1):37-44.
http://dx.doi.org/10.1107/S2053229617016916