2003
DOI: 10.1039/b300001j
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Investigation of the mercury(ii) coordination chemistry of tris[(1-methylimidazol-2-yl)methyl]amine by X-ray crystallography and NMR

Abstract: The coordination chemistry of Hg() with tris[(1-methylimidazol-2-yl)methyl]amine (TMIMA) was investigated. The structures of [Hg(TMIMA) 2 ](ClO 4 ) 2 (1), [Hg(TMIMA)(NCCH 3 )](ClO 4 ) 2 (2) and [Hg(TMIMA)Cl] 2 (HgCl 4 ) (3) were characterized by X-ray crystallography. Complex 1 has six strong Hg-N imidazoyl bonds ranging from 2.257(5) to 2.631(6) Å. Ligand geometry suggests the Hg-N (NR 3 ) distances of 2.959(6) Å in 1 reflects weak bonding interactions. This complex has a 199 Hg chemical shift of Ϫ1496 ppm,… Show more

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Cited by 25 publications
(33 citation statements)
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“…The Hg-N distance found for this structure is in good agreement with the bond length values reported for other imidazole mercury complexes, where this bond ranges from 2.20 to 2.29 Å. [16][17][18] The conformation of the hydroxylic chain favors the formation of two symmetric intramolecular hydrogen bonds between the proton attached to O3 and O2. Those bonds rigidify the structure because they link the two ligand units thus stabilizing the arrangement around Hg 2+ .…”
Section: Complexes With M-ghbzsupporting
confidence: 83%
“…The Hg-N distance found for this structure is in good agreement with the bond length values reported for other imidazole mercury complexes, where this bond ranges from 2.20 to 2.29 Å. [16][17][18] The conformation of the hydroxylic chain favors the formation of two symmetric intramolecular hydrogen bonds between the proton attached to O3 and O2. Those bonds rigidify the structure because they link the two ligand units thus stabilizing the arrangement around Hg 2+ .…”
Section: Complexes With M-ghbzsupporting
confidence: 83%
“…[1][2]1 H NMR studies of Hg II complexes of tripodal ligands have contributed to our understanding of the interplay of Hg II coordination and spectroscopic properties by providing information regarding the magnitude of J199 Hg 1 H and J199 Hg 13 C coupling constants as a function of the nature of the Hg II ligand environment. [3][4][5][6][7] Herein we outline the synthesis, structural and spectroscopic characterization, and amide cleavage properties of two Hg II 3 interactions. Second, we have commenced investigations into biologically-relevant reactions as a function of the group 12 metal ion present.…”
Section: Introductionmentioning
confidence: 99%
“…For example, the fact that the exchange averaged alkyl signals in the mixture of PhSeHgR and RHgCl retain 199 Hg coupling (albeit a weighted average of the exchanging species) indicates that Hg–C bond cleavage does not occur on the timescale associated with the observed exchange process. 48,49 …”
Section: Resultsmentioning
confidence: 99%