A solution of (OxS)2Ca·2HMPA [OxS–= 2-mercaptobenzoxazolyl, C[graphic omitted]; HMPA = O:P (NMe2)3] dissolves solid HgCl2 to give [(OxS)CaCl·2HMPA]2·(OxS)2Ca·(HgCl2)2, 1; in the solid state, the Cl atoms of intact HgCl2 molecules coordinate to Ca2+ ions (which retain links to the N atoms of OxS– ligands) and the S centres are thereby displaced from Ca2+ and capture the Hg.
M. G. Davidson, S. C. Llewellyn, M. L. Solera, P. R. Raithby, R. Snaith and D. S. Wright, J. Chem. Soc., Chem. Commun., 1992, 573 DOI: 10.1039/C39920000573
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