Überraschende Vielfalt

Abstract

S Verglichen mit den anderen Halogenen ist die Polyiodidchemie umfassend erforscht, so sind Mono-, Di-, Triund Tetraanionen mit unterschiedlichen Iodgehalten bis hin zu [I 29 ] 3oder [I 26 ] 4bekannt. 1) Die Strukturvielfalt solcher Verbindungen scheint in Abhängigkeit des Gegenions schier unbegrenzt. Ab dem Jahr 1839 wurden Poly iodid verbindungen systematisch untersucht und bis heute werden neue Verbindungen dargestellt. 1) Beispiele sind die durch Massenspektrometrie in der Gasphase erzeugten Anionen [I 11 ] -, [I 13 ]oder [I 15 ] -, 2) aber auch in kristallinen Festkörpern finden sich immer wieder neuartige Polyiodidstrukturen. 3) Technische Bedeutung hat das Redoxsystem I -/I 3 als Elektrolyt in Farbstoffsolarzellen. 4) Die Unerforschten: Polybromide S QUERGELESEN Molekülzeichnungen von [I 11 ] -, [Br 9 ] -,[Cl 5 ] -und [F

Recent Discoveries of Polyhalogen Anions – from Bromine to Fluorine

“… Schematic diagram of known polyhalide monoanions and dianions, shaded are those, which are not structurally known. Updated presentation of the figure in Ref 8. …”

[HMIM][Br9]: a Room-temperature Ionic Liquid Based on a Polybromide Anion

“…Beyond this, no structural data of a higher polybromide monoanion was known prior to our reports in recent years. Based on new synthetic strategies in either ionic liquids (ILs) [10] or in neat halogens [11] several compounds with polybromide monoanions have been prepared and were further characterized in the last two years [12]. In 2011 our group reported the first preparation and structural characterization of a higher polybromide monoanion [NPr 4 11 ] − .…”

Synthesis and Characterization of [Br3][MF6] (M=Sb, Ir), as well as Quantum Chemical Study of [Br3]+ Structure, Chemical Bonding, and Relativistic Effects Compared with [XBr2]+ (X=Br, I, At, Ts) and [TsZ2]+ (Z=F, Cl, Br, I, At, Ts)

“…[Br 3 ][SbF 6 ]c rystallizes in the orthorhombic space group Pbcn (No. 60, oP80, 60d 8 c 3 a)w ith a = 11.9269 (7), b = 11.5370 (7), c = 12.0640(6) , V = 1660.01(16) 3 , Z = 8a t1 00 K. Interestingly, the compound is not isotypic to the previously reported [Br 3 ] [AsF 6 ]( space group P " 1). [101] We note that the cell volume is ap- [85][86][87][88] [Cl 4 ] + [89] [ClF 2 ] + , [90][91][92] [Cl 2 F] + , [87,93,94] [ClF 4 ] + , [95,96] [99][100][101] [Br 5 ] + [101,102] [BrF 2 ] + , [103,104] [BrF 4 ] + , [105,106] [BrF 6 ] + , [107] [Br 2 F 5 ] + , [12] [Br 3 F 8 ] + [12] [100,108,109] [I 5 ] + , [109] [I 7 ] + (unsure) [110] [I 4 ] 2 + , [111,112] [IF 2 ] + , [114] [ICl 2 ] + , [115,116] [IBrCl] + , [117] [IBr 2 ] + , [118] [I 2 Cl] + (unsure), [119] [I 2 Br] + , [120] [IF 4 ] + , [105] [I 3 Cl 2 ] + , [119] [IF 6 ] + , …”

“…Polyhalide anions have experienced a renaissance and several excellent reviews describe the rapid progress in the field . The formation of hetero‐ and homoatomic clusters with three or more atoms is especially well known for the heavier halogens (see Table ).…”

“…Polyhalide anionsh ave experienced ar enaissance and several excellent reviews describe the rapid progress in the field. [1][2][3][4][5][6][7][8][9] The formation of hetero-and homoatomicc lusters with three or more atoms is especially well known for the heavier halogens (see Ta ble 1). These clusters are stabilized by charge delocalization and some of these clusters have provedt oe xhibit electric conductivity or superconducting transitions.…”