s‐Triazine pincer ligands: Synthesis of their metal complexes, coordination behavior, and applications

Pincer ligands are interesting chelating agents due to their high ability to motivate the metal ion characteristics leading to diverse types of applications. These ligands and their metal complexes are smart materials which have a great impact in the development of diverse applications helped alot in the advancement of the field of coordination chemistry. In homogenous catalytic transformations, pincer ligands improved the chemical and thermal stability that serve to minimize the leaching of the metal during the catalytic cycle. Also, they offered the ability to fine‐tune the electronic properties for the metal center, thereby increasing the scope of their coordination chemistry and applications especially the pincer ligands comprising s‐triazine core. This review discusses some of the general synthetic protocols of these s‐triazine pincer ligands and their metal complexes with various applications in different fields. In addition, their structural diversity and the ligand coordination behaviors with different metal ions were also explored. In this review, we explored some aspects regarding the syntheses, various applications, and structures of the most recent pincer complexes comprising s‐triazine core attached with two or three electron donor heterocyclic moieties. In addition, the diversity in the coordination behavior of these pincer ligands towards different metal ions have been emphasized in this review.