10.1016/j.jorganchem.2011.11.034
The research investigates the reactivity of the ligands 2-(indazol-1-yl)-2-thiazoline (1) and 2-(indazol-1-yl)-1,3-thiazine (2) with palladium(II) acetate, resulting in the formation of various compounds. For ligand 1, a cyclopalladated compound (1a) with a bidentate [C(sp2,phenyl),N] ligand and a central “Pd(m-OAc)2Pd” unit was obtained. Further reactions led to the formation of mononuclear compounds such as [Pd(k2-O,Oacac)(k2-CN-TnInA)] (1c) and [PdCl(PPh3)(k2-CN-TnInA)] (1e). In contrast, ligand 2 reacted with palladium(II) acetate to form a complex with a bidentate [N,N] ligand, cis-[Pd(OAc)2(k2-NN-TzIn)] (2a), which could be transformed into cis-[PdCl2(k2-NN-TzIn)] (2b). The study also involved theoretical calculations using density functional theory (DFT) to understand the regioselectivity of these reactions. The chemicals that played a significant role in this research include palladium(II) acetate (Pd(OAc)2), sodium acetylacetonate (Na(acac)), lithium chloride (LiCl), and triphenylphosphine (PPh3), which were used in the synthesis and transformation of the compounds.