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'Metallo Complexes' in keywords Facet   section ZfN Section B  [X]
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1979 (1)
1Author    Dietrich Breitinger, Wilfred Morell, Knut GrabetzRequires cookie*
 Title    Tetraquecksilbermethane, II [1] Tetrakis(halogenoquecksilber)-methane C(HgX)4 (X = F, Cl, Br und I): Synthesen und Schwingungsspektren Tetramercurimethanes, II [1] Tetrakis(halomercuri)methanes C(HgX)4 (X = F, Cl, Br and I): Syntheses and Vibrational Spectra  
 Abstract    The complete series of tetrakis(halomercuri)methanes C(HgX)4 (X = F, Cl, Br and I) was prepared by metathesis of tetrakis(acetoxymercuri)methane and aqueous hydro-fluoric acid and solutions of halides (Cl -, Br -, and I~), respectively. All compounds are insoluble in most common solvents, but partly soluble in dimethylsulfoxide. Complete vibrational spectra indicate more or less ideally tetrahedral molecules C(HgX)4 in all cases. The originally triply degenerate valence vibrations of the CHg4 entities and the force constants for the C-Hg bonds show distinct correlations with the electronegativities of the halides X. On the other hand the totally symmetrical valence vibrations of CHg4 were found to be highly sensitive to variations in X, mainly due to coupling with the valence vibrations of the Hg-X-groups of the same symmetry species. Some analogies in the vibrational behaviour of the CHg4 fragments and of the isosteric NHg4 core in tetra-mercurioammonium complexes were observed and discussed. 1. Einführung Im Zuge unserer Untersuchungen an Metallo-Komplex-Verbindungen mit den Kationen [Pn(HgCH3)4] + (Pn = N, P und As) erwuchs unser Interesse an Tetraquecksilbermethanen, da in die-sen Verbindungstypen die isosteren Baugruppen PiiHg4 bzw. CHg4 vorliegen (vgl. [1] und dort zitierte eigene Arbeiten). Durch doppelte Umset-zungen der Tetrakis(acetoxyquecksilber)-methane 
  Reference    Z. Naturforsch. 34b, 390—395 (1979); eingegangen am 6. November 1978 
  Published    1979 
  Keywords    Tetrakis(halomercuri) Methanes, Vibrational Spectra, Metallo Complexes 
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 TEI-XML for    default:Reihe_B/34/ZNB-1979-34b-0390.pdf 
 Identifier    ZNB-1979-34b-0390 
 Volume    34