Highly Fluorinated Weakly Coordinating Monocarborane Anions. 1-H-CB₁₁F₁₁^-, 1-CH₃-CB₁₁F₁₁^-, and the Structure of [N(n-Bu)₄]₂[CuCl(CB₁₁F₁₁)]

Silver(I) Complexes of 12‐Phenylalkynyl‐ and 12‐Triisopropylalkynylcarba‐closo‐dodecaborate Anions

“…[17] The silver(I) ion interacts with one H atom of each {closo-1-CB 11 H 11 } cage. The Ag···HB distances of 2.41(2) and 2.21(2) Å, and the respective Ag···B distances of 3.122 (2) [20] but are similar to those in the {L 2 Ag} + complex [(Ph 3 P) 2 Ag{closo-1-CB 11 H 12 }] 2 [d(Ag···B) = 2.892(2), 3.494(2) Å]. [19] The B-H distances of the two BH vertices that reveal Ag···HB interactions are slightly longer than the noncoordinated B-H bonds of the lower B 5 belt.…”

“…[28] For silver, a relativistic small-core potential was used (def2-ecp [27] ). 2 Ag2] suitable for X-ray diffraction were immersed in perfluoropolyether oil, mounted with a polyimide microloop, and transferred to a stream of cold N 2 . Data collection was performed at -173°C with a Bruker X8-Apex II diffractometer using Mo-K α radiation (λ = 0.71073 Å).…”

“…[1] Polyhalogenated {closo-1-CB 11 } anions, such as [1-R-closo-1-CB 11 Hal 11 ] -, [1-R-7,8,9,10,11,12-Hal 6 -closo-1-CB 11 H 5 ] -(R = H, alkyl; Hal = F, Cl, Br, I), and [1-R-closo-1-CB 11 F 11-n (CF 3 ) n ] -(R = H, CF 3 ; n = 5, 11) are well-established, very weakly coordinating anions that enable the stabilization of highly reactive cations, and that are therefore relevant for applications, especially in catalysis and materials science. [2] In recent years, {closo-1-CB 11 } clusters with one or more functional groups have gained increasing attention, as well. For example, clusters of this type have been introduced into anionic and zwitterionic liquid crystals, [3] they have been applied as ligands in catalytically active metal complexes, [4] for the stabilization of highly phosphorescent silver(I) clusters, [5] as well as related gold(I) compounds, [6] for metal complexes with unusually large dipole moments, [7] and for weak-link approach complexes.…”

“…[10] salt and PPh 3 . In solid [(PPh 3 ) 2 Ag1] and [(PPh 3 ) 2 Ag2], the cationic fragment {(PPh 3 ) 2 Ag} + interacts with the C≡C moiety, as shown by single-crystal X-ray diffraction. The interaction of the silver(I) cations in [Ag1] and [Ag2] and the {(PPh 3 ) n Ag} + fragments in the respective coordination compounds is evident from the IR spectra and Raman spectra of solid samples and by multinuclear NMR spectroscopy in solution.…”

[Me3Si][RCB11F11] – Synthese und Eigenschaften

“…Zu den gegen Fluoridionen-Abstraktion beständigsten schwach koordinierenden Anionen gehören die closo-Carborate [RCB 11 F 11 ] À mit R = H, Alkyl, F. [1] Salze der Stammverbindung wurden bereits 1967 hergestellt [2,3] und die fluorierten Derivate 30 Jahre später. [4] + zu stabilisieren vermag. [5] Obwohl dieses erste Salz eines Dimethylaluminium-Kations von besonderem Interesse ist, wurden bisher keine strukturellen oder spektroskopischen Daten mitgeteilt.…”