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Issue 4, 2015
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Supramolecular cations of (m-halogenated-anilinium)(dibenzo[18]crown-6) in Keggin [SMo12O402−] polyoxometallates

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Four supramolecular cations (m-XAni+)(DB[18]crown-6) (X = F, Cl, Br or I; Ani+ = anilinium ion; DB[18]crown-6 = dibenzo[18]crown-6) were introduced into crystals of a Keggin [SMo12O402−] polyanion to form [(m-XAni+)(DB[18]crown-6)]2[SMo12O402−]·4CH3CN (1, 2, 3 or 4 for X = F, Cl, Br or I) through a hydrogen-bonding interaction. Crystals 1, 2, 3 and 4, which were isomorphous to each other, crystallized in the monoclinic space group P21/n. Supramolecular cations (m-XAni+)(DB[18]crown-6) were constructed by a N–H+⋯O hydrogen-bonding interaction. [SMo12O402−] polyoxoanions were infinitely extended in three dimensions through a weak C–H⋯O hydrogen-bonding interaction with DB[18]crown-6. Disorder of the halogen atoms at the meta-position was observed in crystals 1, 2 and 3. The rotational freedom of the (m-XAni+) cations was suppressed because of weak interactions with surrounding molecules.

Graphical abstract: Supramolecular cations of (m-halogenated-anilinium)(dibenzo[18]crown-6) in Keggin [SMo12O402−] polyoxometallates

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Publication details

The article was received on 29 Sep 2014, accepted on 21 Nov 2014 and first published on 04 Dec 2014

Article type: Paper
DOI: 10.1039/C4CE01988A
CrystEngComm, 2015,17, 856-861

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    Supramolecular cations of (m-halogenated-anilinium)(dibenzo[18]crown-6) in Keggin [SMo12O402−] polyoxometallates

    J. Xiong, K. Kubo, S. Noro, T. Akutagawa and T. Nakamura, CrystEngComm, 2015, 17, 856
    DOI: 10.1039/C4CE01988A

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