New Topology in Azide-Bridged Cobalt(II) Complexes: the Weak Ferromagnet [Co2(N3)4(Hexamethylenetetramine)(H2O)]n

Autor:	Ramon Vicente, Lars Öhrström, Beate Sodin, Franz-Andreas Mautner
Rok vydání:	2009
Předmět:	Inorganic Chemistry chemistry.chemical_compound Crystallography Ferromagnetism Chemistry Inorganic chemistry chemistry.chemical_element Crystal structure Azide Physical and Theoretical Chemistry Hexamethylenetetramine Cobalt Topology (chemistry)
Zdroj:	Inorganic Chemistry. 48:6280-6286
ISSN:	1520-510X 0020-1669
DOI:	10.1021/ic9005373
Popis:	A new polynuclear azido-bridged Co(II) compound with formula [Co(2)(N(3))(4)(HMTA)(H(2)O)](n) (1) (HMTA = hexamethylenetetramine) has been structurally and magnetically characterized. The compound 1 crystallizes in the monoclinic system C2/m space group, and consist of a complex three-dimensional system in which end-to-end and end-on azido bridging ligands between the Co(II) atoms coexist. The HMTA ligand is also linking three different Co(II) atoms. The network analysis shows for 1 a three- and six-connected network topology not previously reported. The magnetic properties of 1 are also reported, and it was found that the magnetic interactions define another new three- and four-connected net assigned as a (6.8(2))(6(4).10(2))-tfo net. In the high temperature region the chi(M) versus T plot can be fitted by using the Curie-Weiss law, and the best fit theta value is -26.6 K. For 1 magnetic ordering and spontaneous magnetization is achieved below T(c) = 15.6 K.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_dedup___::b9d5feb2076f7a5e7611063775fb2195 https://doi.org/10.1021/ic9005373 Zobrazit plný text záznamu