Von 1σ⁴, 2σ²‐ zu 1σ⁴, 2σⁿ‐Diphospheten (n = 3–6): die überraschende Beständigkeit der P‐P‐Bindung

Abstract

Ohne Zerstörung des Vierringgerüsts läßt sich die Koordinationszahl des σ2‐Phosphoratoms eines 1σ4, 2σ2‐Diphosphets bis auf sechs erhöhen, wie die unten abgebildete Reihe zeigt.magnified image

A novel access to phosphanylidene–phosphorane complexesviaP-donor substitution and a detailed bonding analysis

“…9,10 This zwitterionic 1,2-diphosphete can undergo oxidation, addition and coordination to transition metals. 9,11,12 A similar cyclic system was reported by Kilian in 2012. 13 Stable acyclic phosphanylidene–phosphoranes I (Fig.…”

Cycloadditions of 1H‐1,3‐Benzazaphospholes with o‐Chloranil

“…1,2‐Dimethyl‐1,3‐benzazaphosphole exhibited different reactivity, simultaneous cycloaddition of two molecules TCBQ to give a high melting zwitterionic bis‐addition product with hexacoordinate λ 5 ‐phosphorus, which was insoluble in most common solvents and only slightly soluble in [D 6 ]acetone ( δ 31 P = –108 ppm) . Triazaphospholes, an anellated 1,3,2‐diazaphosphole and 2‐phosphaindolizines undergo similar reactions to zwitterionic products, later observed also for other P‐compounds . Herein, were report on conversions of some further 1H ‐1,3‐benzazaphospholes with o ‐chloranil to find out if this reaction is a general feature of the benzazaphosphole ring system or dependent on its substitution pattern.…”

“…[3] Triazaphospholes, [12] an anellated 1,3,2-diazaphosphole [13] and 2-phosphaindolizines [14] undergo similar reactions to zwitterionic products, later observed also for other P-compounds. [15][16][17] Herein, were report on conversions of some further 1H-1,3-benzazaphospholes [18] with ochloranil to find out if this reaction is a general feature of the benzazaphosphole ring system or dependent on its substitution pattern.…”