Acid Exchanged Montmorillonite Catalyzed Condensation Reaction of Fluoroalkyliodide onto Amines

Abstract

The H-maghnite (Maghina, Algeria), a monthmorillonite sheet silicate clay was treated in different H₂SO₄ concentrations at 20ºC. The aluminum and silicon were identified by ²⁷Al and ²⁹Si MAS NMR spectroscopy. Three different types of structural units were identified in acid-treated maghnite Q⁴(0A1) units of amorphous silica with three-dimensional cross-liked framework; (SiO)₃SiOH and Q⁴(1A1) units. The catalytic activity of acid-treated maghnite was evaluated by reacting 1,1,1,2,2,3,3,4,4,5,5,6,6-tridecafluoro-8-iodo octane with several amines to yield perfluoroalkylamines and no byproducts were obtained during the reaction. The structure of perfluoroalkylamines obtained during the reaction. The structure of perfluoroalkylamines obtained was characterized by ¹H, ¹³C and ¹⁹F NMR.