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Issue 30, 2013
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A Co16 cluster and a 1-D Mn chain complex supported by benzohydroxamic acid

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Abstract

The syntheses, crystal structures and magnetic properties are described for a {Co16} cluster [CoII16O(OH)2(bha)12(PhCO2)4(Phen)2(MeOH)4]·2MeOH (1) and a 1-D MnII chain complex [Mn(Hbha)2]n·(2MeOH)n (2) (H2bha = benzohydroxamic acid; Phen = 1,10-phenanthroline). The 1 : 1 : 0.5 reaction of Co(O2CMe)2·4H2O, H2bha and 1,10-phenanthroline in MeOH at 100 °C under autogenous pressure gave cluster 1. Complex 2 was obtained from the 1 : 1 reaction mixture of Mn(O2CMe)2·2H2O and H2bha in MeOH under solvothermal conditions. The {Co16} cluster can be thought as a face-centered cube with two wings. The H2bha ligands show hydroximic form in 1 and exhibit hydroxamic mode in 2. The hydroximate ligands in 1 display three distinct binding modes, one of which is novel. Variable-temperature solid-state dc magnetic susceptibility studies have been performed in the 2.0–300 K range for complexes 1 and 2. Antiferromagnetic MII⋯MII exchange interactions were found for both 1 and 2. This work also demonstrates that solvothermal method is a potential synthetic approach for the design and growth of high nuclearity clusters or chain complexes of the H2bha ligand.

Graphical abstract: A Co16 cluster and a 1-D Mn chain complex supported by benzohydroxamic acid

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Publication details

The article was received on 03 May 2013, accepted on 21 May 2013 and first published on 21 May 2013


Article type: Paper
DOI: 10.1039/C3DT51140E
Citation: Dalton Trans., 2013,42, 10912-10918
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    A Co16 cluster and a 1-D Mn chain complex supported by benzohydroxamic acid

    Y. Cao, Y. Chen, L. Li, D. Gao, W. Liu, H. Hu, W. Li and Y. Li, Dalton Trans., 2013, 42, 10912
    DOI: 10.1039/C3DT51140E

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