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Croatica Chemica Acta, Vol. 82 No. 2, 2009.

Original scientific paper

Crystal Structure of the First Polymeric Tetramercurated Methane Derivative of Hofmann's Base

Dalibor Milić ; Laboratory of General and Inorganic Chemistry, Department of Chemistry, Faculty of Science, Horvatovac 102 a, HR-10000 Zagreb, Croatia
Željka Soldin ; Laboratory of General and Inorganic Chemistry, Department of Chemistry, Faculty of Science, Horvatovac 102 a, HR-10000 Zagreb, Croatia
Gerald Giester ; Institute for Mineralogy and Crystallography, University of Vienna, Althanstr. 14, A-1090 Vienna, Austria
Zora Popović ; Laboratory of General and Inorganic Chemistry, Department of Chemistry, Faculty of Science, Horvatovac 102 a, HR-10000 Zagreb, Croatia
Dubravka Matković-Čalogović orcid id orcid.org/0000-0003-4909-8312 ; Laboratory of General and Inorganic Chemistry, Department of Chemistry, Faculty of Science, Horvatovac 102 a, HR-10000 Zagreb, Croatia

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Abstract

By dissolving Hofmann's base, [CHg4O(OH2)](OH)2 – a polymeric organomercury compound, in trifluoromethanesulfonic acid, crystals of [CHg4OH(OH2)2](CF3 SO3)3 2H2O were obtained and characterized by X-ray diffraction. It is the first polymeric tetramercurated methane derivative of Hofmann's base. The asymmetric unit of the monoclinic P21/n space group consists of a monomeric unit of the polymeric cation [CHg4OH(OH2)2]n3n+ three trifluoromethanesulfonate anions and two crystallization water molecules. In the polymeric chains two neighbouring tetramercurated methane moieties are interconnected through an OH group – a dimercurated oxonium ion, –Hg–(OH)+–Hg–. H2O molecules are bound to two mercury atoms that do not take part in the bridging and represent monomercurated oxonium ions Hg(OH)2+ The polymeric chains are arranged in parallel puckered layers and are interlinked by an extensive three-dimensional hydrogen-bonding network. The characteristic coordination of mercury atoms is linear, while the effective coordination is 2+3.

Keywords

organomercury; tetramercurated methane; Hofmann's base; X-ray crystal structure

Hrčak ID:

39653

URI

https://hrcak.srce.hr/39653

Publication date:

15.7.2009.

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