Journal ArticleDOI
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 und I): Syntheses and Vibrational Spectra
TLDR
The complete series of tetrakis(halomercuri)methanes C(HgX)₄ (X = F, Cl, Br and I) was prepared by metathesis of aqueous hydrofluoric acid and solutions of halides (Cl-, Br-, and I-), respectively as discussed by the authors.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 hydrofluoric 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 tetramercurioammonium complexes were observed and discussed.read more
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Ligand Sphere Conversions in Terminal Carbide Complexes
TL;DR: In this article, a series of substituted terminal carbide complexes are described and characterized by NMR, MS, X-ray crystallography, and computational studies, and the experimentally observed irregular variation of the carbide 13C chemical shift is shown to be accurately reproduced by DFT, which also demonstrates that details of the coordination geometry affect carbide chemical shift equally as much as variations in the nature of the auxiliary ligands.
Journal ArticleDOI
Transition Metal Carbide Complexes.
Anders Reinholdt,Jesper Bendix +1 more
TL;DR: Carbide complexes remain a rare class of molecules and their paucity does not reflect exceptional instability but is rather due to the generally narrow scope of synthetic procedures for constructing carbide complexes.
Journal ArticleDOI
Raman Spectra of Mercurimethanes CH4-n (HgX)n at High Pressures†
TL;DR: In this article, the Ramaman spectra of mercurimethanes C (HgX)4 (X = Cl, Br, and I), CH(HgCl)3, and CH2 (hgX), at high pressures up to about 6 GPa were studied, and it was concluded that anharmonic vibrations of light atoms with large vibrational amplitudes should exhibit high pressure sensitivity.