title: Reaction of a complexed phosphinidene with 2,4,6-tri-tert-butyl-1,3,5-triphosphabenzene.
abstract: The terminal phosphinidene complex PhPW(CO)5 reacts with 2,4,6-tri-tert-butyl-1,3,5-triphosphabenzene to give two unexpected multicyclic organophosphorus compounds. One of them results from an initial 1,2-addition, followed by an intramolecular rearrangement. B3LYP/6-31G* calculations on simplified parent systems suggest that the reaction follows a unique concerted reaction pathway. The second, and major, product is a tetraphosphaquadricyclane derivative, which presumably results from an intramolecular [2+2] cycloaddition of an intermediate tetraphosphanorbornadiene complex. Single-crystal X-ray structures are presented for both products.
authors.affiliation: Department of Organic and Inorganic Chemistry, Faculty of Sciences, Vrije Universiteit, Amsterdam, The Netherlands.
authors.forename: M J
authors.initials: MJ
authors.lastname: Vlaar
authors.forename: A W
authors.initials: AW
authors.lastname: Ehlers
authors.forename: M
authors.initials: M
authors.lastname: Schakel
authors.forename: S B
authors.initials: SB
authors.lastname: Clendenning
authors.forename: J F
authors.initials: JF
authors.lastname: Nixon
authors.forename: M
authors.initials: M
authors.lastname: Lutz
authors.forename: A L
authors.initials: AL
authors.lastname: Spek
authors.forename: K
authors.initials: K
authors.lastname: Lammertsma