title: Easy and quantitative access to Fe(II) and Fe(III) di(aryl)alkynylphosphine oxides featuring [Fe(dppe)Cp*] endgroups: terminal P=O functionality blocks the dimerisation of the Fe(III) derivatives.
abstract: A series of paramagnetic di(aryl)alkynylphosphine oxides [PF6] featuring an open-shell [Fe(κ(2)-dppe)(η(5)-C5Me5)](+) endgroup were obtained by oxidation of their neutral Fe(II) parents 3a-c, themselves obtained in a simple and nearly quantitative fashion from the corresponding Fe(II) metallophosphines 1a-c. The new organometallic radicals were characterised by NMR and ESR and were shown to be perfectly stable in solution, in contrast to species such as 1a-b[PF6] which readily dimerise.
authors.affiliation: Institut des Sciences Chimiques de Rennes, CNRS (UMR 6226) Université de Rennes 1, Campus de Beaulieu, 35042 Rennes Cedex, France. frederic.paul@univ-rennes1.fr.
authors.forename: Ayham
authors.initials: A
authors.lastname: Tohmé
authors.forename: Charles T
authors.initials: CT
authors.lastname: Hagen
authors.forename: Stéphanie
authors.initials: S
authors.lastname: Essafi
authors.forename: Arnaud
authors.initials: A
authors.lastname: Bondon
authors.forename: Thierry
authors.initials: T
authors.lastname: Roisnel
authors.forename: Duncan
authors.initials: D
authors.lastname: Carmichael
authors.forename: Frédéric
authors.initials: F
authors.lastname: Paul