Journal ArticleDOI
Extrem kurze Quecksilber-Quecksilber-Kontakte in peri-dimercurierten Naphthalinverbindungen
TLDR
In this paper, the structure of 2-DMSO has been determined by X-ray diffraction methods, where the lattice contains discrete adducts in which the two mercury atoms are bridged by the DMSO oxygen atom.Abstract:
1-Naphthylquecksilberchlorid (1) und 1,8-Naphthalindiylbis-(quecksilberchlorid) (2) werden aus den zugehorigen Naphthyllithium-Verbindungen und HgCl2 mit ca. 80% Ausbeute erhalten. Alternativ kann 2 auch aus 1,8-Naphthalindiyldiborsaureanhydrid und HgCl2 gewonnen werden (Ausbeute 85%). Von 2·DMSO wurde die Kristallstruktur bestimmt. Es liegen diskrete Addukte vor, in denen die beiden Hg-Atome durch das O-Atom des DMSO uberbruckt werden. Die HgCl-Einheiten sind durch Verzerrungen im Naphthalingerust, durch Winkelung der Achsen CHgCl und durch deren Auslenkung aus der Naphthalinebene voneinander weggebogen, so das ein Hg·· Hg-Kontakt von 3.102(1) A resultiert. – 2 symmetrisiert sich bei der Einwirkung von NaI in wasrigem Ethanol unter Bildung von Bis(μ-1,8-naphthalindiyl)diquecksilber (3). Bei der Strukturanalyse dieser im Kristall zentrosymmetrischen Verbindung wurde der bisher kurzeste „nichtbindende” Hg··Hg-Kontakt von 2.797(1) A gefunden. Auch in 3 sind die CHgC-Achsen abgewinkelt [CHgC = 173.3(5)°], und das Naphthalingerust ist verzerrt.
Extremely Short Mercury-Mercury Contacts in peri-Dimercurated Naphthalene Compounds
1-Naphthylmercury chloride (1) and 1,8-naphthalenediylbis(mercury chloride) (2) were prepared from the corresponding naphthyllithium precursors and HgCl2 in ca. 80% yield. In an alternative route, 2 can be obtained from 1,8-naphthalenediyldiboric acid anhydride and HgCl2 in 85% yield. The structure of 2·DMSO has been determined by X-ray diffraction methods. The lattice contains discrete adducts in which the two mercury atoms are bridged by the DMSO oxygen atom. The HgCl moieties are bent away from each other through distortions of the naphthalene framework and of the CHgCl axes, which results in a Hg ‥ Hg distance of 3.102(1) A. – Symmetrization of 2, induced by treatment with NaI in aqueous ethanol, affords bis(μ-1,8-naphthalenediyl)dimercury (3). In the X-ray structure determination of this compound the shortest „non-bonding” Hg·Hg contact reported in the literature has been detected: Hg1··Hg2 = 2.797(1) A. The molecule also shows distortions in the naphthalene framework and in the CHgC axes [CHgC = 173.3(5)°].read more
Citations
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Structure and bonding in metal sulfoxide complexes
Mario Calligaris,Oliviero Carugo +1 more
TL;DR: In this paper, structural parameters of free and coordinated sulfoxides are comprehensively reviewed and average values derived, and principal component analyses have been performed in order to evidence the deformation pathways of sulfoxide upon coordination.
Journal ArticleDOI
Structure and bonding in metal sulfoxide complexes: an update
TL;DR: In this article, the average SO bond distances were calculated from accurate X-ray data, showing a decrease from free sulfoxides (avearge 1.492(1) A) to S-bonded metal complexes (average 1.4738(7) A).
Journal ArticleDOI
Ab initio studies of the dimers (HgH2)2 and (HgMe2)2. Metallophilic attraction and the van der Waals radii of mercury
Pekka Pyykkö,Michal Straka +1 more
TL;DR: In this paper, the authors used the dispersion and electrostatic multipole components to determine the energy of the "metallophilic" attraction between two Hg(II) compounds.
Journal ArticleDOI
Naphthalene derivatives peri-substituted by Group 13 elements
TL;DR: A review of the chemistry of naphthalene derivatives substituted by Group 13 moieties at peri-positions can be found in this paper, where different synthetic approaches have been considered.
Journal ArticleDOI
Lewis Acidic Behavior of Fluorinated Organomercurials
TL;DR: In this paper, the synthesis, structures, and properties of neutral Lewis adducts involving fluorinated organomercurials such as (CF3)2Hg, (C6F5)HgCl, (c6f5) 2Hg and (o-C6f4) Hg]3 are reviewed.
References
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Relativity and the periodic system of elements
Pekka Pyykkö,Jean Paul Desclaux +1 more
TL;DR: In this article, the relativistic effects are defined as the difference between the case of a finite speed of light as in the world we live in and of an infinite speed of time as assumed by most theoretical chemistry.
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Relativistic effects on chemical properties
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