A sulfur mimic of 1,1-bis(diphenylphosphino)methane: a new ligand opens up

Peter E Sues; Alan J Lough; Robert H Morris

doi:10.1039/c3cc49456j

A sulfur mimic of 1,1-bis(diphenylphosphino)methane: a new ligand opens up

Chem Commun (Camb). 2014 May 11;50(36):4707-10. doi: 10.1039/c3cc49456j.

Authors

Peter E Sues¹, Alan J Lough, Robert H Morris

Affiliation

¹ Department of Chemistry, University of Toronto, 80 St. George Street, Toronto, Ontario M5S 3H6, Canada. rmorris@chem.utoronto.ca.

PMID: 24675688
DOI: 10.1039/c3cc49456j

Abstract

A simple method for synthesizing diphosphine monosulfide species was developed utilizing lithium sulfide and chlorophosphine starting materials. This afforded 1,1,2,2-tetraphenyldiphosphine monosulfide (1), as well as 1,1,2,2-tetracyclohexyldiphosphine monosulfide (2), which could be used as convenient ligand precursors. Upon addition of 1 or 2 to the ruthenium compound Ru(C5Me5)(cod)Cl, the diphosphine monosulfides rearranged to give bidentate bis(ditertiaryphosphino)thioether ligands in Ru(C5Me5)(PPh2SPPh2)Cl (3) and Ru(C5Me5)(PCy2SPCy2)Cl (4).