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Polybromide Dianions and Networks Stabilized by Fluorinated Bromo(triaryl)phosphonium Cations
Author(s) -
Mann Lisa,
Senges Gene,
Sonnenberg Karsten,
Haller Heike,
Riedel Sebastian
Publication year - 2018
Publication title -
european journal of inorganic chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.667
H-Index - 136
eISSN - 1099-0682
pISSN - 1434-1948
DOI - 10.1002/ejic.201800404
Subject(s) - chemistry , bromine , phosphonium , raman spectroscopy , dodecane , ion , crystal structure , quantum chemical , medicinal chemistry , infrared spectroscopy , crystallography , inorganic chemistry , stereochemistry , molecule , organic chemistry , physics , optics
Triarylphosphanes react with elemental bromine to give triarylbromophosphonium bromides. With an excess of bromine larger polybromides are formed. The influence of the stepwise fluorination of the cation on the formed polybromide anion was investigated. The polybromide dianions and networks [(C 6 H 5 ) 3 PBr] 2 [Br 14 ], [(C 6 H 4 F) 3 PBr] 2 [Br 14 ], [(C 6 H 4 F) 3 PBr][Br 11 ], [(C 6 H 2 F 3 ) 3 PBr] 2 [Br 16 ], and [(C 6 F 5 ) 3 PBr] 2 [Br 20 ] · Br 2 were obtained and characterized by Raman spectroscopy, single‐crystal X‐ray structure determination and quantum‐chemical calculations at the RI‐B3LYP‐D3/def2‐TZVPP level. Additionally, two further [Br 20 ] 2– dianions, [BMDIM][Br 20 ] {BMDIM = 1,12‐bis[(1‐methylbenzimidazolium)‐3‐yl]dodecane} and [AsPh 4 ] 2 [Br 20 ] · 0.5Br 2 , are presented and compared to all known eicosabromide dianions.