A Versatile Approach to Access Trimetallic Complexes Based on Trisphosphinite Ligands

Identifier:  imarina:9423954

Handle: https://hdl.handle.net/20.500.11797/imarina9423954

Authors:  Miranda-Pizarro, Juan; Alferez, Macarena G; Dolores Fernandez-Martinez, M; Alvarez, Eleuterio; Maya, Celia; Campos, Jesus

Abstract:
A straightforward method for the preparation of trisphosphinite ligands in one step, using only commercially available reagents (1,1,1-tris(4-hydroxyphenyl)ethane and chlorophosphines) is described. We have made use of this approach to prepare a small family of four trisphosphinite ligands of formula [CH3C{(C6H4OR2)(3)], where R stands for Ph (1a), Xyl (1b, Xyl = 2,6-Me-2-C6H3), Pr-i (1c), and Cy (1d). These polyfunctional phosphinites allowed us to investigate their coordination chemistry towards a range of late transition metal precursors. As such, we report here the isolation and full characterization of a number of Au(I), Ag(I), Cu(I), Ir(III), Rh(III) and Ru(II) homotrimetallic complexes, including the structural characterization by X-ray diffraction studies of six of these compounds. We have observed that the flexibility of these trisphosphinites enables a variety of conformations for the different trimetallic species.