Synthesis and characterization of TADDOL-based chiral group six PNP pincer tricarbonyl complexes

Monatsh Chem. 2019;150(1):103-109. doi: 10.1007/s00706-018-2281-0. Epub 2018 Oct 20.

Abstract

Abstract: The new chiral PNP pincer ligand N 2,N 6-bis((3aR, 8aR)-2,2-dimethyl-4,4,8,8-tetraphenyltetrahydro[1,3]dioxolo[4,5-e][1,3,2]dioxaphosphepin-6-yl)pyridine-2,6-diamine (PNP-TADDOL) was synthesized in 80% isolated yield. Complexes of the type [M(PNP-TADDOL)(CO)3] (M = Cr, Mo, and W) were prepared via a solvothermal approach. This methodology constitutes a fast, simple, and practical synthetic method to obtain complexes of that type in high isolated yields. The X-ray structure of the molybdenum complex is presented.

Keywords: Carbonyl ligands; Chiral pincer ligands; Group six metals; Solvothermal synthesis; TADDOL.