title: 2,4,6-Triphenylphosphinine and 2,4,6-triphenylposphabarrelene revisited: synthesis, reactivity and coordination chemistry.
abstract: The synthesis of 2,4,6-triphenylphosphinine has been revisited and a general protocol for the preparation of such low-coordinate phosphorus compounds in good to excellent yields could be established. This allows to investigate several aspects of the chemistry of 2,4,6-triarylphosphinine, such as the reaction with in situ generated benzyne to give 2,4,6-triphenylphosphabarrelene. The corresponding 2,4,6-triphenylphosphabarrelene-selenide could be characterized crystallographically for the first time and the structural and electronic properties of this cage-compound in comparison to classical triarylphosphines could be evaluated. Moreover, [(L)W(CO)5)] complexes of both 2,4,6-triphenylphosphinine and 2,4,6-triphenylphosphabarrelene were prepared and characterized by means of X-ray crystallography. This allowed for the first time a direct structural comparison of these related phosphorus compounds, coordinated to the same metal fragment.
authors.affiliation: Freie Universität Berlin, Institut für Chemie und Biochemie, Fabeckstr. 34/36, 14195 Berlin, Germany. c.mueller@fu-berlin.de.
authors.forename: M
authors.initials: M
authors.lastname: Rigo
authors.forename: J A W
authors.initials: JA
authors.lastname: Sklorz
authors.forename: N
authors.initials: N
authors.lastname: Hatje
authors.forename: F
authors.initials: F
authors.lastname: Noack
authors.forename: M
authors.initials: M
authors.lastname: Weber
authors.forename: J
authors.initials: J
authors.lastname: Wiecko
authors.forename: C
authors.initials: C
authors.lastname: Müller