Synthesis and Characterization of the Novel 1,2,4-Triphosphaferrocene [Cp*Fe(η⁵-P₃C₂Mes₂)] Containing Sterically Demanding Mesityl Groups

GRAPHICAL ABSTRACT

Abstract

To vary the substitution pattern of 1,2,4-triphospholyl ligands, K[P₃C₂Mes₂] (Mes = 2,4,6-trimethylphenyl), bearing two bulky mesityl ligands, was synthesized. Subsequent reaction with [FeBr₂(dme)] and LiCp* results in the formation of the corresponding triphosphaferrocene [Cp*Fe(η⁵-P₃C₂Mes₂)] (1) in very good yields. ³¹P{¹H} NMR investigations reveal a temperature depending behavior of the chemical shifts of 1. The X-ray structural analysis exhibits an eclipsed sandwich compound.

Keywords:

• Phosphorus
• iron
• triphosphaferrocene
• phospholyl
• mesityl