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A Second Metalloid Ga 18 Cluster and Its Topological Similarity to the High‐Pressure Ga‐II Modification
Author(s) -
Steiner Jochen,
Schnöckel Hansgeorg
Publication year - 2006
Publication title -
chemistry – a european journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.687
H-Index - 242
eISSN - 1521-3765
pISSN - 0947-6539
DOI - 10.1002/chem.200600227
Subject(s) - metalloid , cluster (spacecraft) , similarity (geometry) , topology (electrical circuits) , mathematics , materials science , combinatorics , computer science , metallurgy , artificial intelligence , metal , programming language , image (mathematics)
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 (P t Bu 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=Si t Bu 3 ) and their structural relation to the elemental modifications Ga‐III and β‐Ga, respectively.