Journal of the Chemical Society, Dalton Transactions p. 987 - 992 (1995)
Update date:2022-08-03
Topics:
Baggio, Ricardo
Garland, Maria Teresa
Perec, Mireille
N,N'-Dicyclohexyldithiooxamide (H2L) reacted with HgX2 (X = SCN or Cl) to form the novel mercury mixed-ligand complexes a = 11.318(1), b = 17.727(2), c = 11.536(2) Angstroem, β = 109.08(2) deg and Z = 4.Crystals of 3 are monoclinic, space group P21 (no. 4), with a = 8.563(1), b = 21.414(3), c = 11.649(2) Angstroem, β = 103.58(2) deg and Z = 2.The structures were each refined by a full-matrix least-squares procedure to R1 = 0.031 for 2218 reflections with F2 >/= 2.0?(F2) for 1 and R1 = 0.047 (274 reflections) for 3.Complex 1 is mononuclear with HgS4 units linked by short intermolecular S...S interactions.Complex 3 is a binuclear zwitterionic system with one S,S'-chelating H2L ligand bonded to a mercury atom and a second ligand acting in an unusual conformation as a S,S'-bidentate bridging group between the ionic species HgS2Cl(1+) and HgCl3(1-).The two mercury atoms are separated at a non-interacting distance.The infrared spectra of the complexes in the range 650-200 cm(-1) are discussed in the light of the known structures.
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