This Account summarizes the historical development of latent sulfur-chelated ruthenium precatalysts from the Lemcoff group’s perspective. The most unique feature of this family of complexes is that they appear in the more stable cis-dichloro configuration, which is latent towards olefin metathesis reactions. Activation of the precatalyst, brought about by isomerization from the cis-dihalo to the trans-dihalo forms, can be achieved either by thermal or light stimuli. Modifications of the ligand sphere bestows unique properties upon the catalysts, which have been used in diverse applications, from 3D printing of metathesis polymers to orthogonally divergent synthetic pathways. 1 Introduction 2 Effect of Sulfur Substituents 3 Effect of Benzylidene Ligands 4 Effect of the NHC Ligands 5 Effect of the Anionic Ligands 6 Conclusions

中文翻译：

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硫螯合钌烯烃复分解催化剂

本报告从 Lemcoff 小组的角度总结了潜在的硫螯合钌预催化剂的历史发展。该复合物家族最独特的特征是它们以更稳定的顺式二氯构型出现，这对烯烃复分解反应具有潜在性。通过从顺式二卤到反式二卤形式的异构化引起的前催化剂的活化可以通过热刺激或光刺激来实现。配体球的修饰赋予催化剂独特的性能，催化剂已用于多种应用，从复分解聚合物的 3D 打印到正交发散的合成途径。1 引言 2 硫取代基的作用 3 亚苄基配体的作用 4 NHC 配体的作用 5 阴离子配体的作用 6 结论