NDLI: A self-assembled octanuclear complex bearing the uncommon close-packed $\{Fe_{4}Mn_{4}(μ_{4}-O)_{4}(μ-O)

Content Provider	World Health Organization (WHO)-Global Index Medicus
Author	Kokozay, Vladimir N. Nesterova, Oksana V. Chygorin, Eduard N. Pombeiro, Armando J. L. Shishkin, Oleg V. Boca, Roman Omelchenko, Irina V.
Description	Author Affiliation: Nesterova OV ( Centro de Química Estrutural, Instituto Superior Técnico, Universidade de Lisboa, Avenida Rovisco Pais, 1049-001 Lisboa, Portugal. pombeiro@tecnico.ulisboa.pt.)
Abstract	A one-pot open-air reaction of manganese powder with iron(II) chloride in DMF solution of the Schiff base $(H_{2}L)$ formed in situ from salicylaldehyde and hydroxylamine hydrochloride yields the heterometallic complex $[Fe_{4}(μ_{4}-O)_{4}Mn_{4}(L)_{8}(DMF)_{4}]·2DMF$ (1). Single crystal X-ray analysis shows that its molecular structure is based on the octanuclear core $\{Fe_{4}Mn_{4}(μ_{4}-O)_{4}(μ-O)_{4}\}$ with a quite rare molecular structure type $\{M_{8}(μ_{4}-X)_{4}(μ-X)_{4}\},$ where the central cube-like iron motif is modified with four terminal manganese fragments, the whole core being presented as the $\{Fe_{4}(μ_{4}-O)_{4}\}$ + 4{Mn(μ-O)} combination. Using the data from the Cambridge Structural Database (CSD), an analysis of the octanuclear structures with similar central $\{M_{4}(μ_{4}-X)_{4}\}$ fragments was performed. The hierarchical order of molecular structure types with the general formula $M_{8}X_{n}$ for such compounds was proposed and the topological features as well as the factors that influence the molecular type formation are discussed. Variable-temperature (1.8–300 K) magnetic susceptibility measurements reveal an antiferromagnetic coupling among the magnetic centres in 1.
ISSN	14779226
Issue Number	33
Journal	Dalton Trans.
Volume Number	44
e-ISSN	13645447
Language	English
Publisher	Royal Society of Chemistry
Publisher Date	2015-09-07
Publisher Place	Great Britain (UK)
Access Restriction	Subscribed
Subject Keyword	Chemistry
Content Type	Text
Resource Type	Article
Subject	Inorganic Chemistry

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