A comparison of the rates of methylation of mercury(II) species in aquatic media by various organotin and organosilicon moieties.
Metals can be methylated in environmental aqueous media by a variety of organotin and organosilicon compounds. Main group metals and metalloids were surveyed for the identification of species that can either donate or accept methyl groups. The methylation of mercury(II) by trimethyltin cation was found to be a bimolecular reaction, the reaction rate of which decreased with increasing chloride concentration. Kinetic investigations using NMR techniques showed that the most important pairs of reactants were (CH3)3Sn+ + HgCl2, (CH3)3SnCl + HgCl2, and (CH3)3SnCl + HgCl-3. Sodium 2,2,3,3-tetradeutero-3-(trimethylsilyl)propionate (TSP) and sodium 2,2-dimethyl-2-silapentane-5-sulfonate (DSS) were found to methylate mercury(II). Organylsilatranes were found to transfer their organic groups readily to mercury(II) to produce organomercury compounds.
Bellama
J M
JM
Department of Chemistry and Biochemistry, University of Maryland, College Park 20742.
Jewett
K L
KL
Manders
W F
WF
Nies
J D
JD
D009682:Magnetic Resonance Spectroscopy / Q000379:methods; D008628:Mercury; D008745:Methylation; D008767:Methylmercury Compounds; D009947:Organotin Compounds; D012828:Silicones; D014867:Water
D008767:Methylmercury Compounds; D009947:Organotin Compounds; D012828:Silicones; D014867:Water; D008628:Mercury