Transmetalation occurs upon addition of HgCl2 to (8-quinolyl)SnMe3 to yield (8-quinolyl)HgCl. The molecule features a frustrated HgâN Lewis pair; however the mercury(II) center showed low affinity for sulfur Lewis bases, S8 or thiophene. In the presence of NH4SCN, ligand redistribution led to R2Hg. The molecule was found as linear or bent polymorphs, depending on the solvent of recrystallization. The geometry about Hg(II) in the bent polymorph is distorted trigonal prismatic that features a CâHgâC angle of 84°, weak intramolecular HgâN contacts, and two intermolecular η2-quinoline contacts in which the neighboring R2Hg molecule participates as a bis-η2-bidentate ligand.
在将HgCl2添加到(8-
喹啉基)SnMe3中时会发生过渡
金属化反应,生成(8-
喹啉基)HgCl。该分子具有惰性Hg-N路易斯对;然而,
汞(II)中心对
硫路易斯碱、S8或
噻吩的亲和力较低。在NH4SCN的存在下,
配体的重新分布导致R2Hg的形成。根据重结晶溶剂的不同,该分子可以呈线性或弯曲多晶型。弯曲多晶型中Hg(II)的几何结构是扭曲的三棱柱,其C-Hg-C角为84°,分子内Hg-N接触较弱,分子间存在两个η2-
喹啉接触,相邻的R2Hg分子作为双η2-双齿
配体参与其中。