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Rational Synthesis, Structures and Properties of the Ionic Liquid Binary Iodine‐Bromine Octahalide Series [I n Br 8− n ] 2− ( n =0, 2, 3, 4)
Author(s) -
Abdelbassit Mohammed S.,
Curnow Owen J.,
Dixon Miriam K.,
Waterland Mark R.
Publication year - 2019
Publication title -
chemistry – a european journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.687
H-Index - 242
eISSN - 1521-3765
pISSN - 0947-6539
DOI - 10.1002/chem.201902134
Subject(s) - bromine , trihalide , bromide , chemistry , iodine , ionic bonding , melting point , salt (chemistry) , ionic liquid , raman spectroscopy , halogen , crystallography , halide , inorganic chemistry , ion , physics , organic chemistry , alkyl , optics , catalysis
A series of octanuclear iodine‐bromine interhalides [I n Br 8− n ] 2− ( n =0, 2, 3, 4) were prepared systematically in two steps. Firstly, addition of a dihalogen (Br 2 or IBr) to the triaminocyclopropenium bromide salt [C 3 (NEt 2 ) 3 ]Br forms the corresponding trihalide salt with Br 3 − or IBr 2 − anions, respectively. Secondly, addition to Br 3 − of half an equivalent of Br 2 gives the octabromine polyhalide [Br 8 ] 2− , whereas addition to IBr 2 − of half an equivalent of Br 2 , IBr or I 2 gives the corresponding interhalides: [I 2 Br 6 ] 2− , [I 3 Br 5 ] 2− , and [I 4 Br 4 ] 2− , respectively. The four octahalides were characterized by X‐ray crystallography, computational studies, Raman and Far‐IR spectroscopies, as well as by TGA and melting point. All of the salts were found to be ionic liquids.