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Syntheses, crystal structures and magnetic properties of carboxylato-bridged polymeric networks of Mn-II

Manna, S.C., Zangrando, E., Drew, M.G.B., Ribas, J. and Chaudhuri, N.R. (2006) Syntheses, crystal structures and magnetic properties of carboxylato-bridged polymeric networks of Mn-II. European Journal of Inorganic Chemistry (2). pp. 481-490. ISSN 1434-1948

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To link to this item DOI: 10.1002/ejic.200500568

Abstract/Summary

Three new carboxylato-bridged polymeric networks of Mn-II having molecular formula [Mn(ox)(dpyo)](n) (1), {[Mn-2(mal)(2)(bpee)(H2O)(2)]center dot 0.5(bpee)center dot 0.5(CH3OH)}n, (2) and {[Mn-3(btc)(2)(2,2'-bipy)(2)(H2O)(6)]center dot 4H(2)O}(n) (3) [dpyo, 4,4'-bipyridine N,N'dioxide; bpee, trans-1,2 bis(4-pyridyl) ethylene; 2,2'-bipy, 2,2'-bipyridine; ox = oxalate dianion; mal = malonate dianion; btc = 1,3,5-benzenetricarboxylate trianion] have been synthesized and characterized by single-crystal X-ray diffraction studies and low temperature magnetic measurements. Structure determination of complex I reveals a covalent bonded 2D network containing bischelating oxalate and bridging dpyo; complex 2 is a covalent,bonded 3D polymeric architecture, formed by bridging malonate and bpee ligands, resulting in an open framework with channels filled by uncoordinated disordered bpee and methanol molecules. Whereas complex 3, comprising btc anions bound to three metal centers, is a 1D chain which further extends its dimensionality to 3D via pi-pi and H-bonding interactions. Low temperature magnetic measurements reveal the existence of weak antiferromagnetic interaction in all these complexes. ((c) Wiley-VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2006).

Item Type:Article
Refereed:Yes
Divisions:Faculty of Life Sciences > School of Chemistry, Food and Pharmacy > Department of Chemistry
ID Code:11461
Uncontrolled Keywords:manganese(II), carboxylate, crystal structure, magnetic behavior , BIMETALLIC OXALATE COMPLEXES, METAL COORDINATION POLYMERS, SINGLE-MOLECULE MAGNETS, X-RAY-DIFFRACTION, MANGANESE(II) COMPLEXES, COBALT(II) CARBOXYLATE, EXTENDED STRUCTURES, ORGANIC FRAMEWORKS, TRANSITION, LIGAND

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