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Issue 45, 2019
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Influence of organic cations on the stacking of semiquinone radical anions

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Abstract

A series of seven novel salts of tetrachloro- and tetrabromosemiquinone radical anions with organic cations is prepared and structurally characterised by single-crystal X-ray diffraction. Four types of stacks of radical anions have been identified: i) stacks of pancake-bonded dimers (Peierls-distorted stacks), ii) stacks of pancake-bonded trimers, iii) stacks of equidistant radicals and iv) a novel type of equidistant stacks of partially charged radicals (charge: −1/2, imposed by a stoichiometry of 1 : 2). Cations play an important role in stabilisation of the stacks of radical anions; the structures with stacks of equidistant radicals include columns of cations. However, the structures having pancake-bonded dimers and trimers are accompanied by isolated pairs of cations.

Graphical abstract: Influence of organic cations on the stacking of semiquinone radical anions

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Publication details

The article was received on 13 Jun 2019, accepted on 02 Sep 2019 and first published on 09 Sep 2019


Article type: Paper
DOI: 10.1039/C9CE00919A
CrystEngComm, 2019,21, 6920-6928

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    Influence of organic cations on the stacking of semiquinone radical anions

    K. Molčanov, V. Milašinović, N. Ivić, V. Stilinović, D. Kolarić and B. Kojić-Prodić, CrystEngComm, 2019, 21, 6920
    DOI: 10.1039/C9CE00919A

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