A Second Metalloid Ga₁₈ Cluster and Its Topological Similarity to the High‐Pressure Ga‐II Modification

Abstract

The topology of many modifications of elemental gallium is reflected in the large variety of metalloid Ga clusters that have been isolated as intermediates on the way from the metastable molecular GaX species (X=Cl, Br, I) by means of disproportionation to the bulk metal. Herein, we report the synthesis and characterization of the first metalloid cluster anion [Ga(18)(PtBu(2))(10)](3-) with the singular core topology that resembles the gallium high-pressure modification Ga-II. The stabilization of the cluster anion through ion-pair contacts with a chainlike "Li(4)Br(2) backbone" is discussed. Furthermore, the compound is discussed in context of the other metalloid clusters Ga(18)R(8) and Ga(22)R(8) (R=SitBu(3)) and their structural relation to the elemental modifications Ga-III and beta-Ga, respectively.

Differentiation rather than aging of muscle stem cells abolishes their telomerase activity

“…Die Familie der ligandgeschützten Galliumcluster ist um das Tri‐ anion [Ga18(PtBu2)10]3− reicher 8). Ebenfalls 18 Galliumatome weist die Ringverbindung (6) auf; sie sind dort carboxy‐ und alkoxyverbrückt.…”

Metastable Aluminum(I) Compounds: Experimental and Quantum Chemical Investigations on Aluminum(I) Phosphanides—An Alternative Channel to the Disproportionation Reaction?

“…However, in contrast to the above mentioned Al clusters, the PR 2 ligands also exhibit bridging (Ga-PR 2 -Ga) bonding. Examples of this type of cluster are Ga 16 R 10 , [12] (see below), Ga 22 R 12 , [13] Ga 18 R 10 3À , [14] and [Ga 51 Br 6 R 14 ] 3À , [15] with R = PtBu 2 .…”

Synthesis of Supported Ga Nanodrops by a Bottom‐up Route

“…The abovementioned Ga-filled carbon nanotubes were synthesized by two different high temperature procedures. Starting from Ga 2 O 3 and carbon [2] as well as from GaN and CH 4 [3] as [27][28][29] and references cited therein) obtained discrete Ga n clusters (n = 4 to 84) with specific size by mild reduction of Ga I species in the presence of strong stabilizing agents. Using weaker stabilizing agents like alcohols, acetone or 2-butanone Cárdenas et al [30] obtained unstable colloids of gallium.…”