Mercury(II) and methylmercury(II) complexes of novel sterically hindered thiolates: carbon-13 and mercury-199 NMR studies and the crystal and molecular structures of [MeHg(SC6H2-2,4,6-Pr-iso3)], [Hg(SC6H4-2-SiMe3)2], [Hg(2-SC5H3N-3-SiMe3)2], and [Hg{(2-SC6H4)2SiMe2}]2

Abstract

Mercury(II) and Methylmercury(II) Complexes of Novel Sterically Hindered Thiolates: 13C and 199Hg NMR Studies and the Crystal and Molecular Structures of [MeHg(SC6H2-2,4,6-Pr'3) ], [Hg(SC6H4-2-SiMe3)2], [Hg(2-SC5H3N-3-SiMe3)2], and [Hg|<2-SC6H4)2SiMe2|]2

Bis(3-phenyl-1,2,4-thiadiazole-5-thiolato)mercury(II)

“…Similar, but slightly longer, corresponding distances were found in the two determinations of METZUG, falling in the range 2.970 (8)±3.119 (8) A Ê , and intermolecular HgÁ Á ÁN contacts of average length 2.9 A Ê were found in the structure of a linear Hg II aminothiolate complex (Almagro et al, 2001). In similar linear Hg II complexes with thiolate ligands, Block et al (1990) and Casals et al (1991) noted secondary HgÁ Á ÁS interactions shorter than the sum of the van der Waals radii, increasing the Hg coordination number. The title structure contains none of these, but has close contacts with the phenyl rings of the molecule related by y + 1, with the nearest distance being HgÁ Á ÁC4 = 3.289 (3) A Ê .…”

Electrochemical Synthesis and Structural Characterisation of Cadmium and Mercury Complexes Containing Pyrimidine‐2‐thionate Ligands

“…The Hg-S bond length [2.330(2) Å] is very similar to those found in other thionatomercury complexes with a linear geometry. [11,[47][48][49] In the complex the two ligands are on different sides of the line defined by the S-Hg-S bonds, and the pyrimidine rings are in a staggered conformation. The ligands are oriented in such a way that the N(1) atom is close to the mercury atom (distance of 2.773 Å).…”

“…These values are similar to those found in other mercury(ii) thionates in which a weak interaction between the metal atom and the heterocyclic nitrogen is observed. [11,49] …”

“…Moreover, these association phenomena may be limited by incorporating steric constraints by appropriate ligand design or introducing coligands to block a number of coordination sites around the metal. Recently, a great deal of effort has been made [11][12][13][14][15][16][17] to modify the thiolate ligand by introducing a solubilizing group or a bulky substituent that might modify the aggregation process. (8) were also characterised by X-ray diffraction.…”

Synthesis and Structural Characterization of Copper(I), Silver(I) and Gold(I) Complexes with Pyrimidine‐2‐thionato Ligands and their Adducts with Phosphanes

“…Moreover, these association phenomena can be limited by the incorporation of steric constraints through appropriate ligand design or the introduction of co‐ligands to block a number of coordination sites around the metal. Recently, great effort has been made20–26 to modify S donor ligands by introducing a solubilizing group or a bulky substituent that might modify the aggregation process.…”