Open-Chain Polyphosphorus Hydrides (Phosphines)

Protonation and Hydrogen Atom Abstraction Reactions in the Synthesis of the [HP7M(CO)3]2- Ions (M = Cr, W)

“…This inherent instability makes systematic studies of the solution chemistry difficult. Korber and von Schnering have recently isolated and structurally characterized the H 2 P 7 ± ion [10] which is consistent with the enhanced stability of the anionic polyphosphides relative to the neutral polyphosphanes [1,2]. We find that the anionic metallated hydrogen polyphosphides are relatively robust which allows for study of the structural and solution chemistry [11, 13±15] complexes (eq.…”

“…Baudler and co-workers have developed the chemistry of the hydrogen polyphosphanes, H m P n where n > 1, over the past several years [1,2]. Many of these compounds were first identified in decomposition byproducts from distillations of diphosphane, P 2 H 4 .…”

“…The intermediate species H 2 P 7 ± and HP 7 2± were spectroscopically identified in these reactions [1,2,8]. More recently, von Schnering and Korber isolated and structurally characterized the H 2 P 7 ± ion as the PPh 4 + salt [10].…”

“…In the solid state, the ions have no crystallographic symmetry but in solution they show virtual C s symmetry ( 31 P NMR spectroscopy) due to an intramolecular wagging process. Crystallographic data for [K(2,2,2-crypt)] 2 …”

Schrittweise Erweiterung eines Cp*‐Rings am Pentelidenkomplex und stereoselektive Bildung von Triphosphanen

“…Die E-P-Bindunglängen in 5 und 6 liegen im Bereich von Einfachbindungen. Infolge des sterischen Einflusses der sperrigen W(CO) 5 -und tBu-Gruppen sind die P-P-P-Bindungswinkel in 5 (103.25(7)8) etwas kleiner als berechnete Werte für die Stammverbindung P 3 H 5 (104.508), [12] und der P-As-P-Winkels in 6 (100.23(10)8) ist noch kleiner. Der W-P-Abstand in 5 und 6 ist vergleichbar mit dem in W(CO) 5 PH 3 .…”