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Mechanochemical Synthesis of a Mercury(II) Metal-Organic Framework Reveals a Two-Dimensional Polymorph Stabilized by Weak Interactions
preprintsubmitted on 23.08.2019, 14:05 and posted on 26.08.2019, 16:39 by Isaiah R. Speight, Igor Huskić, Mihails Arhangelskis, Hatem M. Titi, Robin Stein, Timothy P. Hanusa, Tomislav Friscic
Solid-state mechanochemistry revealed a novel polymorph of the mercury(II) imidazolate framework, based on square-grid (sql) topology layers. Reaction monitoring and periodic density functional theory calculations show that the sql-structure is of higher stability than the previously reported three-dimensional structure, with the unexpected stabilization of a lower dimensionality structure explained by contributions of weak interactions, which include short C-H···Hg contacts.