Synthesis and characterization of two new halo complexes of iodine: (C 4 H 9 ) 4 N[I 2 Br] − and (C 4 H 9 ) 4 N[I 2 Cl] − and theoretical calculations of their structures

Abstract

Two new compounds of iodine: (C₄H₉)₄N[I₂Br], (C₄H₉)₄N[I₂Cl], were easily synthesized in a nearly quantitative yield using a direct reaction of I₂ with tetrabutylammonium halide salts (chloride and bromide). The products were separated and characterized by elemental analysis and spectroscopic methods such as: IR, UV/Visible, ¹H-NMR, ¹³C-NMR and ⁸¹Br-NMR techniques. They were studied computationally at B₃LYP/LANL2DZ level of theory. The optimized structures are in good agreement with the available experimental results. Production of these compounds shows the ability of tetrabutylammonium salts in halide addition to main group elements.