“Oxide Route” for the Preparation of Mercury(II) N-Heterocyclic Carbene Complexes

Imidazolium salts react with HgO to give mono-NHC dihalomercury(II) complexes in acceptable yields. The solid-state structures of several examples were determined by X-ray diffraction. The complexes consist of monomeric (NHC)HgX2 units, which feature tricoordinated mercury atoms, a structural arrangement rarely found for mercury compounds.咪唑鎓盐与氧化汞（HgO）反应，可得到单N-杂环卡宾（N-Heterocyclic Carbene，NHC）二卤化汞(II)配合物，反应产率可观。通过X射线衍射（X-ray diffraction）测定了数种该类配合物的固态结构。该类配合物由单体形式的(NHC)HgX₂单元构成，其中汞原子为三配位结构，这种配位排布在汞化合物中极为罕见。