Abstract A short overview on the structural design of the Hoveyda–Grubbs-type ruthenium initiators chelated through oxygen, nitrogen or sulfur atoms is presented. Our aim was to compare and contrast O-, N-and S-chelated ruthenium complexes to better understand the impact of electron-withdrawing and-donating substituents on the geometry and activity of the ruthenium complexes and to gain further insight into the trans–cis isomerisation process of ...
