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Incorporation of Hexanuclear Mn(II,III) Carboxylate Clusters with a {Mn6O2} Core in Polymeric Structures

Institute of Applied Physics, Academy of Sciences of Moldova, Academiei 5, MD-2028 Chisinau, Moldova
Departement für Chemie und Biochemie, Universität Bern, Freiestrasse 3, 3012-Bern, Switzerland
Author to whom correspondence should be addressed.
Crystals 2018, 8(2), 100;
Received: 11 January 2018 / Revised: 12 February 2018 / Accepted: 15 February 2018 / Published: 17 February 2018
(This article belongs to the Special Issue Crystal Structure Analysis of Supramolecular and Porous Solids)
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A new series of hexanuclear mixed-valent carboxylate coordination clusters of the type [Mn6O2(O2CR)10L4] (R = CMe3; CHMe2) featuring a {MnII4MnIII2(μ4-O)2} core of composition [Mn6O2(O2CCMe3)10(Me3CCO2H)3(EtOH)]•(Me3CCO2H) (1), [Mn6O2(O2CCMe3)10(Me3CCO2H)2 (EtOH)2]•2(EtOH) (2) and [Mn6O2(O2CCMe3)10(Me3CCO2H)2(MeOH)2]•2(MeOH)•H2O (3), and coordination polymers which incorporate such clusters, namely [Mn6O2(O2CCHMe2)10(pyz)(MeOH)2]n (4), {[Mn6O2(O2CCHMe2)10(pyz)1.5(H2O)]•0.5(H2O)}n (5), and [Mn6O2(O2CCMe3)10(HO2CCMe3)2(en)]n (6), have been synthesized (where pyz = pyrazine, en = ethyl nicotinate). The modification of the cluster surface by a diverse combination of capped or bridging ligands attached to peripheral MnII atoms results in discrete clusters with a closed hydrophobic exterior shell in 1 and 2, supramolecular chains built through hydrogen bonded solvent molecule clusters in 3, linear coordination polymers in 4 and 6 or a ladder-like coordination polymer in 5. The H-bonded coordination polymers 4 and 5 form supramolecular layers in crystals. View Full-Text
Keywords: manganese cluster; cluster-based coordination polymer; X-ray diffraction analysis manganese cluster; cluster-based coordination polymer; X-ray diffraction analysis

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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).

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Darii, M.; Filippova, I.G.; Hauser, J.; Decurtins, S.; Liu, S.-X.; Kravtsov, V.C.; Baca, S.G. Incorporation of Hexanuclear Mn(II,III) Carboxylate Clusters with a {Mn6O2} Core in Polymeric Structures. Crystals 2018, 8, 100.

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