Crystal Engineering with Mercuric Chloride
2002; American Chemical Society; Volume: 2; Issue: 2 Linguagem: Inglês
10.1021/cg0155696
ISSN1528-7505
AutoresStuart R. Batten, Alexander R. Harris, Keith S. Murray, Jonathan P. Smith,
Tópico(s)Molecular Sensors and Ion Detection
ResumoTwo new network solids containing mercury ions are reported. The structure of HgCl4·H2tpt·H2O (tpt = 1,3,5-tri(4-pyridyl)-2,4,6-triazine) contains H2tpt2+ cations connected into 1D zigzag chains via hydrogen bonding between protonated and unprotonated pyridyl groups of adjacent cations. The third pyridyl group of each H2tpt2+ cation is also protonated and hydrogen-bonds to tetrahedral HgCl42- anions that lie as appendages to the main hydrogen-bonded chain. (HgCl2)2(hmt) (hmt = hexamethylenetetramine) contains HgCl2 and hmt molecules. The mercury is pseudo-octahedral, coordinating to two trans chloride ligands (Hg−Cl = 2.351(1) Å) and making four much longer equatorial interactions with hmt molecules (Hg−N = 2.735(4) Å) and adjoining HgCl2 molecules (Hg−Cl = 3.105(1) Å). The long Hg−N interactions link the two species into 2D (4,4) sheets, while long Hg−Cl interactions connect these sheets into an overall 3D network through chains of rhombohedral Hg−Cl···Hg−Cl··· motifs.
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