Mercurophilic interaction in novel polynuclear Hg(II)-2-aminoethanethiolates.
The reaction of 2-aminoethanethiol hydrochloride with Hg(2)Cl(2) in water yielded elemental mercury and one-dimensional polynuclear compounds [{Hg(3)Cl(5)(SCH(2)CH(2)NH(3))(3)}Cl](n) and [HgCl(SCH(2)CH(2)NH(2))(H(2)O)(2)](n) (2). The coordination environment around Hg in 1 and 2 is quite variable despite similar reaction conditions. The formation of a five-membered S/N chelate in 2 can be attributed to the use of base to produce a neutral ligand. Three independent types of Hg atoms, both three- and four-coordinate are observed in 1, whereas in 2, the Hg atom is tetracoordinate with S, N and Cl atoms in the primary coordination sphere. Despite distinct structural chemistry, the coordination environments in 1 and 2 are fairly similar with repeating units connected with bridged thiolate S atoms in addition to a terminal Cl attached to Hg. Intermolecular hydrogen-bonding involving amine protons, Cl and water molecules are responsible for a three-dimensional network in both 1 and 2. A short Hg...Hg distance of 3.564 A, indicates the presence of a mercurophilic interaction in 1. The compounds have been characterized by (1)H and (13)C NMR, UV-Vis, FT-IR, Raman, mass spectrometry, TGA and single X-ray crystallography.
Bharara
Mohan S
MS
Department of Chemistry, University of Kentucky, Lexington, KY 40506-006, USA.
Bui
Thanhhoa H
TH
Parkin
Sean
S
Atwood
David A
DA
D000588:Amines / Q000737:chemistry; D002413:Cations, Divalent; D002712:Chlorides / Q000737:chemistry; D018360:Crystallography, X-Ray / Q000379:methods; D003543:Cysteamine / Q000737:chemistry*; D006860:Hydrogen Bonding; D008024:Ligands; D009682:Magnetic Resonance Spectroscopy; D008627:Mercuric Chloride / Q000737:chemistry; D008628:Mercury / Q000737:chemistry*; D015394:Molecular Structure; D009942:Organometallic Compounds / Q000138:chemical synthesis*; D011522:Protons; D013057:Spectrum Analysis / Q000379:methods
D000588:Amines; D002413:Cations, Divalent; D002712:Chlorides; D008024:Ligands; D009942:Organometallic Compounds; D011522:Protons; D008627:Mercuric Chloride; D003543:Cysteamine; D008628:Mercury