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Issue 103, 2016, Issue in Progress
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{CoII/III5} horseshoe and {NiII4} lacunary cubane coordination clusters: the isobutyrate/N-butyldiethanolamine reaction system

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Abstract

The polynuclear coordination compounds [CoII3CoIII2(Hbda)2(bda)2(ib)6]·2MeCN (1) and [NiII4(Hbda)3(ib)5(MeCN)] (2) (H2bda = N-butyldiethanolamine, ib = isobutyrate) are prepared under aerobic conditions using an identical synthetic protocol that solely differs in the employed transition metal (CoII vs. NiII). Whereas compound 1 displays a mixed-valent, pentanuclear, horseshoe-shaped structure with alternating Co(II) and Co(III) ions, compound 2 presents a tetrahedrally-shaped Ni(II) structural motif where four nickel centers are bridged by three O atoms to afford a lacunary Ni4O3 cubane, a motif hitherto only observed as a substructure of higher-nuclearity coordination clusters and polyoxometalates. Both compounds are thermally surprisingly stable (>130 °C). 1 exhibits weak antiferromagnetic exchange interactions; 2 shows a ferromagnetic coupled triangle of three Ni centers interacting antiferromagnetically with a single Ni apex.

Graphical abstract: {CoII/III5} horseshoe and {NiII4} lacunary cubane coordination clusters: the isobutyrate/N-butyldiethanolamine reaction system

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Publication details

The article was received on 29 Jul 2016, accepted on 17 Oct 2016 and first published on 18 Oct 2016


Article type: Paper
DOI: 10.1039/C6RA19232G
Citation: RSC Adv., 2016,6, 100664-100669
  • Open access: Creative Commons BY-NC license
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    {CoII/III5} horseshoe and {NiII4} lacunary cubane coordination clusters: the isobutyrate/N-butyldiethanolamine reaction system

    S. Schmitz, K. Yu. Monakhov, J. van Leusen, Natalya V. Izarova, V. Heß and P. Kögerler, RSC Adv., 2016, 6, 100664
    DOI: 10.1039/C6RA19232G

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