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Issue 13, 2018
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Supramolecular assembly of oxalatomolybdates controlled by the hydrogen bonding potential of Co(III)-ammine cations

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Abstract

A systematic study of the possibility of controlling the formation of oxalatomolybdate anions by the choice of a counterion and adjustment of pH was presented. Using four CoIII(ammine) macrocations ([Co(NH3)6]3+, [Co(NO2)(NH3)5]2+, [Co(en)3]3+ and [Co(ox)(en)2]+) in acidic aqueous solutions, ten crystalline solids were obtained. They were found to contain a total of six different oxalatomolybdate species, three of which, a cyclic tetramer, [Mo2O4(μ-O)2(ox)2]28−, a linear tetramer [Mo4O8(μ-O)3(ox)4(H2O)2]6− and a polymer, [Mo4O11(ox)4(H2O)]n6n have not been reported to date. The oxalatomolybdate species found in solids mostly do correspond with the predominant species in solution at the pH of the solution from which they were obtained. Condensation of those species can be correlated with the hydrogen bonding ability of the used macrocation, a complex cation of Co(III).

Graphical abstract: Supramolecular assembly of oxalatomolybdates controlled by the hydrogen bonding potential of Co(iii)-ammine cations

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Publication details

The article was received on 21 Dec 2017, accepted on 16 Feb 2018 and first published on 09 Mar 2018


Article type: Paper
DOI: 10.1039/C7CE02205K
Citation: CrystEngComm, 2018,20, 1889-1898
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    Supramolecular assembly of oxalatomolybdates controlled by the hydrogen bonding potential of Co(III)-ammine cations

    M. Cindrić, V. Stilinović, M. Rubčić, G. Medak, D. Šišak Jung and V. Vrdoljak, CrystEngComm, 2018, 20, 1889
    DOI: 10.1039/C7CE02205K

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