Synthesis and characterization of Hg(II) complexes of Me3MCH2SeMe, (M = Si, Ge). Crystal structures of [HgX2(Me3SiCH2SeMe)]2, X = Cl, Br, I

Chadha, Raj K.; Drake, John E.; McManus, Neil T.; Mislankar, Anil G.

doi:10.1139/v87-383

Cited by 9 publications

(3 citation statements)

References 23 publications

(26 reference statements)

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“…Such a variation is commonly found for terminal and bridging Hg−Br distances of thiolate-bridged compounds of Hg(II) . The Hg−Br−Hg bridge is symmetrical (3.073(11) Å), which is in contrast to the fact that unsymmetrical Hg−Br−Hg bridges are more frequently observed. ,− The weak Hg−S br (between units) and normal Hg−Br br distances suggest that Br plays a more important role than S in holding the three different units together.…”

Section: Crystallographic Studiesmentioning

confidence: 93%

“…48 The Hg-Br-Hg bridge is symmetrical (3.073(11) Å), which is in contrast to the fact that unsymmetrical Hg-Br-Hg bridges are more frequently observed. 13, [49][50][51][52] The weak Hg-S br (between units) and normal Hg-Br br distances suggest that Br plays a more important role than S in holding the three different units together.…”

Section: Crystallographic Studiesmentioning

confidence: 99%

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Structure-Directing Influence of Halide in Mercury Thiolate Clusters

et al. 2005

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Under identical conditions, the reaction of 2-aminoethanethiol hydrochloride with HgX(2) (X = Cl and Br) in water yielded discrete hexanuclear [Hg(6)Cl(8)(SCH(2)CH(2)NH(3))(8))]Cl(4).4H(2)O (1) and nonanuclear [Hg(9)Br(15)(SCH(2)CH(2)NH(3))(9)](Cl(0.8)Br(0.2))(3) (2) complexes with unusual coordination environments. Compound 1 crystallizes as triclinic with a = 9.434(2) Angstroms, b = 10.999(2) Angstroms, c = 13.675(7) Angstroms, alpha = 92.9(7) degrees, beta = 105.2(7) degrees, and gamma = 96.9(7) degrees, whereas 2 is monoclinic with a = 14.162(3) Angstroms, b = 8.009(16) Angstroms, c = 19.604(4) Angstroms, alpha = gamma = 90.0 degrees, and beta = 92.7(3) degrees. In both cases, it is observed that the halide creates the secondary structure around trinuclear units (dimer in 1 and trimer in 2) through Hg-X bonding. Two independent types of Hg atoms (four- and five-coordinate in 1) and (three- and four-coordinate in 2) are observed. The geometry around Hg is quite variable with bridging thiolate and both bridging and terminal halides. The angles around Hg associated with the S atoms are more obtuse than expected from mercury(II) thiolates with a coordination number of more than 2. Intermolecular hydrogen bonding involving NH(3)(+), water molecules, and the halide atoms is responsible for the three-dimensional network in both compounds. Relatively short Hg...Hg interactions in 1 (3.797 and 3.776 Angstroms) and in 2 (3.605 and 3.750 Angstroms) are also observed. The compounds have been characterized with the help of (1)H and (13)C NMR, UV-Vis, infrared, Raman, and mass spectrometry, thermogravimetric analysis, and single X-ray crystallography.

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Section: Crystallographic Studiesmentioning

confidence: 93%

Section: Crystallographic Studiesmentioning

confidence: 99%

Structure-Directing Influence of Halide in Mercury Thiolate Clusters

et al. 2005

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“…,[264][265][266][267][268][269][270][271][272][273][274][275][276][277][278][279][280][281][282]; a pair of bromine atoms[118,229,280,[283][284][285][286][287][288][289][290][291]; and a pair of iodine atoms[56,60,71,118,280,[292][293][294][295][296][297][298][299][300][301]. There are correlations between the Hg-Hgdistance, the Hg-L-Hg and μΙ,-Η^-μΙ.…”

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confidence: 99%

Mercury Coordination Compounds: Classification and Analysis of Crystallographical and Structural Data

Holloway¹,

Melnı́k²

1994

Main Group Metal Chemistry

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Mercury is a unique member of the IIB group of elements. The ability of Hg(ll) to bind with sulphur, and the bioconversion of the metal to methylmercury(ll) cation is responsible for many of the environmental problems associated with it. Some five hundred and fifty mercury coordination compounds with structures established by X-ray crystallography are reviewed. Of these, twenty six examples have a mercury atom in the +1 oxidation state, one has an oxidation state of+1.33, while the majority have mercury in the +2 oxidation state. Nuclearities range from monomer through tetramers, with some heptamers and polymers. Coordination numbers range from two to eight, four being the most common, with ligands ranging from monodentate to octadentate. Three types of isomerism are established, distortion, polymer and coordination number isomerism. Correlations between ligand donor atoms, bond lengths and bond angles are indicated. The absence of metalmetal bonding is shown for all Hg(ll) derivatives.

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Reaction with Trimethylsilyl Chalcogenides

Page¹

1998

Inorganic Reactions and Methods

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Synthesis and characterization of Hg(II) complexes of Me₃MCH₂SeMe, (M = Si, Ge). Crystal structures of [HgX₂(Me₃SiCH₂SeMe)]₂, X = Cl, Br, I

Cited by 9 publications

References 23 publications

Structure-Directing Influence of Halide in Mercury Thiolate Clusters

Structure-Directing Influence of Halide in Mercury Thiolate Clusters

Mercury Coordination Compounds: Classification and Analysis of Crystallographical and Structural Data

Reaction with Trimethylsilyl Chalcogenides

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