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Supramolecular Zwitterions Based on a Novel Boronic Acid-Squarate Dianion Synthon

Abstract

Reaction of squaric acid (H2SQ) with the three pyridine-appended boronic acid derivatives (BA), viz 4-pyridinylboronic acid (1BA), 3-pyridinylboronic acid (2BA), and (4-(pyridin-4-yl)phenyl)boronic acid (3BA), leads to formation of supramolecular zwitterions of general formula [SQ(BAH)2]•xH2O generated by proton transfer from the squaric acid to the pyridine sites. The zwitterion SQ(1BAH)2]•2H2O can further react with the neutral molecule bipyridine (bpy) leading thus to ternary system of formula [SQ(1BAH)2]•bpy.

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Publication details

The article was received on 12 Mar 2019, accepted on 13 Apr 2019 and first published on 15 Apr 2019


Article type: Paper
DOI: 10.1039/C9CE00367C
Citation: CrystEngComm, 2019, Accepted Manuscript

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    Supramolecular Zwitterions Based on a Novel Boronic Acid-Squarate Dianion Synthon

    S. d'Agostino, L. Fornasari and D. Braga, CrystEngComm, 2019, Accepted Manuscript , DOI: 10.1039/C9CE00367C

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