Iron(III)-Pivalate-Based Complexes with Tetranuclear {Fe-4(mu(3)-O)(2)}(8+) Cores and N-Donor Ligands: Formation of Cluster and Polymeric Architectures

Baca, Svetlana G.; Filippova, Irina G.; Keene, Tony D.; Botezat, Olga; Malaestean, Iurii L.; Stoeckli-Evans, Helen; Kravtsov, Victor Ch.; Chumacov, Iurii; Liu, Shi-Xia; Decurtins, Silvio (2011). Iron(III)-Pivalate-Based Complexes with Tetranuclear {Fe-4(mu(3)-O)(2)}(8+) Cores and N-Donor Ligands: Formation of Cluster and Polymeric Architectures. European journal of inorganic chemistry, 2011(3), pp. 356-367. Weinheim: Wiley-VCH 10.1002/ejic.201000838

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Different synthetic routes have been used for the preparation of a new tetranuclear [Fe4O2(O2CCMe3)(8)(bpm)] cluster (1) and a one-dimensional coordination polymer [Fe4O2-(O2CCMe3)(8)(hmta)](n) (2) (bpm = 2,2'-bipyrimidine and hmta = hexamethylenetetramine). For cluster 1, two structural isomers, 1a and 1b center dot 3MeCN, have been found. X-ray crystallographic analysis showed that all complexes consist of a central {Fe-4(mu(3)-O)(2)}(8+) core. In 1a, metal ions in the core are additionally linked by six bridging pivalates as two other pivalates and a bpm ligand are chelated to Fe-III ions, whereas in cluster 1b, metal ions in the {Fe-4(mu(3)-O)(2)}(8+) core are linked by seven bridging pivalates and only one carboxylate as well as bpm are chelated to the iron centers. In coordination polymer 2, [Fe4O2(O2CCMe3)(8)] clusters are bridged by hmta ligands to form zigzag chains. Magnetic measurements have been carried out to characterize these complexes and revealed antiferromagnetic interactions between Fe-III ions with best-fit parameters of J(wb) = -72.2 (1a) and -88.7 cm(-1) (1b) for wing...body interactions.

Item Type:	Journal Article (Original Article)
Division/Institute:	08 Faculty of Science > Department of Chemistry, Biochemistry and Pharmaceutical Sciences (DCBP)
UniBE Contributor:	Liu, Shi-Xia, Decurtins, Silvio
ISSN:	1434-1948
Publisher:	Wiley-VCH
Language:	English
Submitter:	Factscience Import
Date Deposited:	04 Oct 2013 14:26
Last Modified:	05 Dec 2022 14:08
Publisher DOI:	10.1002/ejic.201000838
Web of Science ID:	000287160000007
URI:	https://boris.unibe.ch/id/eprint/9540 (FactScience: 215290)