ChemInform Abstract: Reaction of Dialkyliodophosphines with Tetrahydrofuran. Part 2.

Abstract

Die Dialkyliodphosphine (I) reagieren mit Tetrahydrofuran (II) unter Bildung von Tetramethylendialkylphosphoniumiodiden (III), Tetraalkylpyrophosphinaten (IV) und 1,4‐Diiodbutan (V).

Alkyltributylphosphonium chloride ionic liquids: synthesis, physicochemical properties and crystal structure

“…Anhydrous analogues for other halides have been structurally determined, namely tetramethylphosphonium fluoride ([P 1 1 1 1 ]F), 44 tetrakis (decyl)phosphonium bromide ([P 10 10 10 10 ]Br), 45 and a small number of alicyclic phosphonium iodides. [46][47][48] Furthermore, different polymorphs of anhydrous tetraethylammonium 49,50 and 1-methyl-1-propylpyrrolidinium 51,52 chlorides are also known.…”

“…However, some crystal structures of alicyclic phosphonium salts were found. [46][47][48] In these 45 structures, the iodide anions are relatively close to the phosphorus atom (see Table 5 for minimum P···I distances). If we examine the pair of iodide salts containing spiro and single heterocyclic substituents, the iodide can approach closer to the centre of the spiro compound (4.53 vs. 4.63 Å).…”