Synthesis, Structure, and Properties of [4-Methyl-2,6-Bis(2-Methylphenyl)Phenyl]Bis(2,4,6-Triisopropylphenyl)Phosphine

GRAPHICAL ABSTRACT

Abstract

A novel sterically crowded triarylphosphine, [4-methyl-2,6-bis(2-methylphenyl)phenyl]bis(2,4,6-triisopropylphenyl)phosphine (1), was synthesized by the reaction of 4-methyl-2,6-bis(2-methylphenyl)phenylcopper(I) with chlorobis(2,4,6-triisopropylphenyl)phosphine. Triarylphosphine 1 exhibits a low inversion barrier, a reversible oxidation at low potential, and a UV absorption in long wavelength typical of sterically crowded triarylphosphines. The mCPBA oxidation of 1 gave the corresponding phosphine oxide of more crowded and rigid structure.

Keywords:

• Triarylphosphine
• oxidation potential
• UV-Vis spectrum
• variable temperature NMR
• triarylphosphine oxide