Vibrational and nuclear magnetic resonance studies of the formation of alkylmercury(II) halide complex anions
Abstract
Vibrational-spectroscopic measurements show the formation of [HgMeCl2]– from [HgMe(Cl)] and [NBun4] Cl in benzene, chloroform, dichloromethane, tetrahydrofuran, and acetonitrile but not in methanol or water. Similar formation of complex anions occurs for [HgMe(X)](X = Br, I, or SCN) and for [HgR(X)](RX = EtCl, PrnCl, BunCl, EtBr, PrnBr, BunBr, or Etl). The effects of the addition of halide ions on δ(199Hg), measured by 1H-{199Hg} INDOR, and 2J(HgH) have been investigated and compared with the effects of solvents on these parameters. It is suggested that the complexes have an essentially linear RHgX group with the second halide much more weakly attached in the equatorial plane.