A three-membered phosphorus ring: (C2F5P)3

Abstract

The synthesis of tris(pentafluoroethy1)cyclotriphosphine is described.

A selective route to aryl-triphosphiranes and their titanocene-induced fragmentation

“…Almost 100 years later in 1964 the molecular structure of the product could be identified as P 5 Ph 5 by X-ray crystal structure analysis 2. Although, Cowley et al already mentioned the synthesis of P 3 (C 2 F 5 ) 3 in 1970,3 it was later discussed that in fact the tetramer and pentamer were formed under the reaction conditions described 4. The first stable triphosphirane P 3 t Bu 3 was reported by Baudler and co-workers in 1976,5,6 and various synthetic approaches towards triphosphiranes have since emerged 7.…”

Beiträge zur Chemie des Phosphors, 116 Kernresonanzspektren und Kristallstruktur von Tri-tert-butylcyclotriphosphan / Contributions to the Chemistry of Phosphorus, 116 NMR Spectra and Crystal Structure of Tri-tert-butylcyclotriphosphane

“…Sie können in Abhängigkeit von den Substituenten am Phosphor-Dreiring eine bemerkenswerte kinetische Stabilität aufweisen und sind daher zum Teil in reiner Form isolierbar [3][4][5]. Diesen präparativen Erfolgen der Synthese einer Reihe von einheitlichund gemischt-substituierten Cyclotriphosphanen waren 1965 der massenspektrometrische Existenznachweis der reaktiven Stammverbindung P3H3 [7] und 1970 die Darstellung des perfluorierten Organylderivates (PC2Fö)3 [8] voraufgegangen.…”

Aromatic polycyclic benzenoid tetraanions: pyrene and perylene anions revisited

“…When RLi complexed by (5,5)-7 was added to C6H5CHO, the optical yields varied from 8315 to 21% ee, and the ch3 ch2ol¡ (ssyi dominant isomer produced depended on the R of RLi and the solvent. The highest optical yield (92% ee) involved Et2Mg reacting with C6H5CHO.…”