title: The reductive P-P coupling of primary and secondary phosphines mediated by N-heterocyclic carbenes.
abstract: The dehydrogenative coupling of primary and secondary phosphines with the N-heterocyclic carbene iPr2Im (1,3-di-isopropyl-imidazolin-2-ylidene) has been reported. The dehydrogenation of R2PH affords diphosphines R2P-PR2. The reaction of iPr2Im with ArPH2 leads to the formation of NHC phosphinidene adducts iPr2Im[double bond, length as m-dash]PAr and cyclic oligophosphines P4Ar4, P5Ar5 and P6Ar6, depending on the stoichiometry used. The NHC acts in these reactions as a phosphine activator and hydrogen acceptor.
authors.affiliation: Institut für Anorganische Chemie, Julius-Maximilians-Universität Würzburg, Am Hubland, D-97074 Würzburg, Germany. u.radius@uni-wuerzburg.de.
authors.forename: Heidi
authors.initials: H
authors.lastname: Schneider
authors.forename: David
authors.initials: D
authors.lastname: Schmidt
authors.forename: Udo
authors.initials: U
authors.lastname: Radius