A solution of (OxS)2Ca·2HMPA [OxSâ= 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 OxSâ ligands) and the S centres are thereby displaced from Ca2+ and capture the Hg.
                                    (OxS)2CaÂ-2HMPA[OxSâ= 
2-巯基苯并恶唑,C[图形略去];HMPA= O:P (NMe2)3]溶解固体 HgCl2,得到[(OxS)CaClÂ-2HMPA]2Â-(OxS)2CaÂ-(HgCl2)2, 1;在固体状态下,完整的 HgCl2 分子中的 Cl 原子与 Ca2+ 离子配位(Ca2+ 离子与 OxSâ 
配体的 N 原子保持链接),S 中心因此从 Ca2+ 中移出并捕获 Hg。