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

Milić, Dalibor and Soldin, Željka and Giester, Gerald and Popović, Zora and Matković-Čalogović, Dubravka (2009) Crystal Structure of the First Polymeric Tetramercurated Methane Derivative of Hofmann's Base. Croatica Chemica Acta, 82 (2). pp. 337-344. ISSN 0011-1643

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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.

Item Type: Article
Keywords: organomercury; tetramercurated methane; Hofmann's base; X-ray crystal structure
Date: 2009
Subjects: NATURAL SCIENCES > Chemistry
Divisions: Faculty of Science > Department of Chemistry
Publisher: Hrvatsko kemijsko društvo
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Depositing User: Branka Maravic
Date Deposited: 09 May 2014 12:44
Last Modified: 09 May 2014 12:44

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