Design and syntheses of a new family of palladium complexes derived from tridentate ligands and their application as catalysts for Suzuki-Miyaura cross-coupling reactions

Publication date: Available online 14 December 2017 Source:Journal of Organometallic Chemistry Author(s): Anand Ratnam, Manju Bala, Rajan Kumar, U.P. Singh, Kaushik Ghosh Palladium complexes [Pd(L1−5) (PPh3)]ClO4 (LnH (n = 1–5, H = phenolic dissociable proton) (1–5)) were synthesised and characterised by different spectroscopic methods like 1H NMR, IR and UV- visible spectral studies. The molecular structure of the representative complex [Pd(L2) (PPh3)]ClO4 (2) was determined by X-ray crystallography. These new complexes were utilised to study Suzuki-Miyaura cross-coupling reactions. Substituted aryl halides were reacted with the phenylboronic acid in presence of these palladium-based catalysts and sodium hydroxide. Biphenyl and its derivatives were synthesized via. C-C bond formation. The plausible mechanism of these cross-coupling reactions was proposed on the basis of theoretical calculation via density functional theory (DFT). Graphical abstract

Source: Journal of Organometallic Chemistry - December 16, 2017 Category: Chemistry Source Type: research