Structural analysis and magnetic properties of the dicubane-like tetramer [Ni(dpk·OH)(N3)]4·2H2O (dpk = di-2-pyridyl ketone) †

Autor:	G.E. Barberis, Roberto Cortés, Zurine E. Serna, M. Karmele Urtiaga, M. Gotzone Barandika, Teófilo Rojo
Rok vydání:	2000
Předmět:	chemistry.chemical_classification Ketone Chemistry Stereochemistry Infrared spectroscopy chemistry.chemical_element General Chemistry Magnetic susceptibility Metal Crystallography Nickel chemistry.chemical_compound Deprotonation Tetramer visual_art visual_art.visual_art_medium Azide
Zdroj:	Journal of the Chemical Society, Dalton Transactions. :29-34
ISSN:	1364-5447 1470-479X
DOI:	10.1039/a905430h
Popis:	A nickel(II)tetramer with azide and di-2-pyridyl ketone (dpk) of general formula [Ni(dpk·OH)(N3)]4·2H2O (dpk·OH being the deprotonated gem-diol resulting from hydrolysis of dpk) was synthesized and structurally characterised through X-ray single crystal diffraction analysis and IR spectroscopy. The structure consists of dicubane-like tetrameric entities where simultaneous (1,1)-N3 and O bridges can be found, being an unprecedented arrangement for metal(II) azide systems. Measurements of the magnetic susceptibility revealed the occurrence of ferromagnetic interactions in the clusters. The extension of the magnetic exchange has been evaluated by means of a spin Hamiltonian with four J constants (J1 = 18.8, J2 = 6.9, J3 = 1.3 and J4 = 0.2 cm−1).
Databáze:	OpenAIRE
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