Struktur und Charakterisierung von CI₃⁺[Al{OC(CF₃)₃}₄]⁻; Lewis‐Aciditäten von CX₃⁺und BX₃

Abstract

Fast ausschließlich auf den Iod‐Atomen, und nicht am formalen Carbeniumzentrum A, ist die positive Ladung des CI3+‐Ions in CI3+[Al{OC(CF3)3}4]− lokalisiert (siehe Resonanzstrukturen B–D). Rechnungen und der experimentellen Charakterisierung zufolge ist die Lewis‐Säurestärke der CX3+‐Homologen (X=F–I) gegen Fluoridionen umgekehrt abgestuft als die der isoelektronischen Borhalogenide BX3 und nimmt demzufolge von CF3+ nach CI3+ ab.

Dynamics and Counterion‐Dependence of the Structures of Weakly Bound Ag+–P4S3 Complexes

“…[d] Determined by using the thermochemical volume of the [pftb] À ion [42] and the crystal structures of [ [43] and […”

Tetraalkylammonium Salts of Weakly Coordinating Aluminates: Ionic Liquids, Materials for Electrochemical Applications and Useful Compounds for Anion Investigation

“…Moreover we have shown that even very reactive cations like simple carbenium ions (CI 3 + ) [21,22] or reactive cations like PX 4 + , [23,24] AsBr 4 + , [25] [27] or P 7 S 6 I 2 + [28] (X = halogen) are compatible (i.e., could be stabilized) as salts of these aluminates. Especially the P À X cations are incompatible with all other anion types.…”

Perfluorinated Alkoxyaluminate Salts of Cationic Brønsted Acids: Synthesis, Structure, and Characterization of [H(OEt2)2][Al{OC(CF3)3}4] and[H(THF)2][Al{OC(CF3)3}4]

“…[4][5][6][7][8][9][10]11] However, all the currently known [ [12,13] and their use to stabilize weakly bound silver complexes such as Ag(η 2 -P 4 ) 2 + [14] and Ag(η 4 -S 8 ) 2 + [15] as well as highly electrophilic cations like PX 4 + , P 2 X 5 + , P 3 I 6 + , and P 5 X 2 + (X = Br, I), [16,17] CS 2 Br 3 + , [18] and CI 3 + . [19] Li + , [12,13] Ag + , [12] Tl + , [20] Cs + , Ph 3 C + , [21] and NR 4 + [13,22] 4 ] salts. Moreover, during the last ten years a considerable experimental and theoretical debate has been going on as to whether a truly symmetrical hydrogen bond exists or not.…”