Eine kettenförmige η5-Cp*Bi-Verbindung mit 11fach koordiniertem Bismut

Abstract

Bei der Umsetzung von (Cp*Al)4 mit BiI3 in Toluol bei Raumtemperatur werden rote Kristalle der Verbindung (η5‐Cp 2*Al)(η5‐Cp*Bi)(μ‐AlI4)(AlI4)2 · 2 C7H8 gebildet, deren Festkörperstruktur eine kettenförmige Anordnung von Cp*Bi‐Einheiten aufweist, die über Tetraiodoaluminat‐Ionen verbrückt werden. Diese Strukturmerkmale werden mit denen von Aromaten‐Komplexen der schweren Elementen der 14. Gruppe (Zinn, Blei) verglichen.

Anisotropic NMR Interaction Tensors in the Decamethylaluminocenium Cation

“…However, the structures of both cations are very similar, and each cation possesses almost perfect D 5 d symmetry due to the staggering of the Cp* rings. The structure of one such cation, which is virtually identical to those found in other decamethylaluminocenium salts, , is shown in Figure . The tetrachloroaluminate anions are only slightly distorted from ideal tetrahedral symmetry and there are no unusually short contacts between the chlorine atoms of the tetrachloroaluminate anions and the decamethylaluminocenium cations.…”

A Phosphorus Lewis Super Acid: η5-Pentamethylcyclopentadienyl Phosphorus Dication

“…Although a number of related group 15 cations [(h 2 -Cp*)PnX] + (Pn = P, X = NMe 2 , 38 tBu, 39 NHtBu, 40 Cl 33 ; Pn = As, X = Cl 33 ) have been studied, the only dication of the form [(h 5 -Cp*)Pn] 2+ was reported in the bismuth salt (h 5 -Cp 2 Al) (h 5 -Cp*Bi) (m-AlI 4 ) (AlI 4 ) 2 $2C 7 H 8 . 41 Strong Lewis acids based on main-group elements have gained increasing attention. [42][43][44][45] Our group has a longstanding interest in phosphorus-based Lewis acids, as well as their application in frustrated Lewis pair chemistry and Lewis acid catalysis.…”

Molecular Assemblies Based on Cp*BiX2 Units (X = Cl, Br, I): An Experimental and Computational Study

“…The bismocenium ion has been prepared by halide abstraction from a substituted bis(cyclopentadienyl)bismuth chloride, (1,2,4- t Bu 3 C 5 H 2 ) 2 BiCl. In 1999, Schnöckel et al obtained red crystals of a compound with 11-fold-coordinated bismuth atoms by reaction of BiI 3 with [Cp*Al] 4 in toluene at room temperature . The solid-state structure of the observed compound exhibits a chain-like arrangement of [Cp*Bi] 2+ units that are bridged by tetraiodoaluminate ions.…”