title: Fixation and release of intact E₄ tetrahedra (E=P, As).
abstract: By the reaction of [NacnacCuCH3CN] with white phosphorus (P4) and yellow arsenic (As4), the stabilization and enclosure of the intact E4 tetrahedra are realized and the disubstituted complexes [(NacnacCu)2(μ,η(2:2)-E4)] (1 a: E=P, 1 b: E=As) are formed. The mono-substituted complex [NacnacCu(η(2)-P4)] (2), was detected by the exchange reaction of 1 a with P4 and was only isolated using low-temperature work-up. All products were comprehensively spectroscopically and crystallographically characterized. The bonding situation in the products as intact E4 units (E=P, As) was confirmed by theory and was experimentally proven by the pyridine promoted release of the bridging E4 tetrahedra in 1.
authors: Institut für Anorganische Chemie, Universität Regensburg, 93040 Regensburg (Germany) http://www.uni-regensburg.de/chemie-pharmazie/anorganische-chemie-scheer/
authors: Fabian
authors: F
authors: Spitzer
authors: Marek
authors: M
authors: Sierka
authors: Mario
authors: M
authors: Latronico
authors: Piero
authors: P
authors: Mastrorilli
authors: Alexander V
authors: AV
authors: Virovets
authors: Manfred
authors: M
authors: Scheer
keywords: NMR spectroscopy; arsenic; density functional calculations; main-group chemistry; phosphorus