title: A mixed arsenic-phosphorus centered biradicaloid.
abstract: Main-group singlet biradicaloids have been thoroughly investigated in the past two decades, especially derivatives of cyclobutane-1,3-diyl. However, in each of the known examples, the radical centers are identical. Therefore, we sought to prepare a mixed dipnictadiazanediyls with P and As bearing the radical character. To achieve this goal, the unprecedented cyclodichloro arsaphosphadiazane [ClP(μ-NTer)2AsCl] had to be prepared first. Treatment of [ClP(μ-NTer)2AsCl] with a halide-abstracting agent led to the novel cyclic cation [P(μ-NTer)2AsCl](+), while reduction with magnesium afforded the first arsaphosphadiazanediyl [P(μ-NTer)2As].
authors.affiliation: Institut für Chemie, Universität Rostock, Albert-Einstein-Strasse 3a, 18059 Rostock (Germany) http://www.schulz.chemie.uni-rostock.de/
authors.forename: Alexander
authors.initials: A
authors.lastname: Hinz
authors.forename: Axel
authors.initials: A
authors.lastname: Schulz
authors.forename: Alexander
authors.initials: A
authors.lastname: Villinger
keywords: arsenic; biradical; heterocycle; phosphorus; synthesis