Si@Al₅₆[N(2,6‐iPr₂C₆H₃)SiMe₃]₁₂ – der größte neutrale metalloide Aluminiumcluster: ein molekulares Modell für eine Si‐arme Al‐Si‐Legierung?

Abstract

Si mittendrin: Si‐dotierte Al44‐Superatome bilden ein kubisch‐primitives Kristallgitter (siehe Bild; • Al, • Si) in dem Cluster Si@Al56[N(Dipp)SiMe3]12 , der ausgehend von einer metastabilen AlCl‐Lösung und dem Si‐haltigen Liganden N(Dipp)SiMe3 hergestellt wurde (Dipp=2,6‐iPr2C6H3). Das zentrale Si‐Atom hat drastische Auswirkungen auf die Struktur und Bindungsverhältnisse des Clusters.

The SiSn Chemical Bond: An Integrated Thermochemical and Quantum Mechanical Study of the SiSn Diatomic Molecule and Small Si–Sn Clusters

“…[6] Furthermore, metalloid clusters containing a [MM 0 n ] core (with n comparatively large) [7,8] can be regarded as molecular models for M-poor M-M' alloys. [9] In the last decade, the study of clusters and nanostructures of Group 14 elements has received considerable attention, [10] especially in regard to the bonding behavior and growth pattern as a function of cluster size. [3] This interest is directly related to the quest for the reduction of the gate size in electronic devices, which stimulates the study of the evolution of semiconductor properties, and mainly of silicon, from bulk to clusters, nanoclusters, and the limit of small molecules.…”

Low‐Valent MxAl3Cluster Salts with Tetrahedral [SiAl3]+and Trigonal‐Bipyramidal [M2Al3]2+Cores (M=Si/Ge)

“…Jutzi and Schnöckel reported the synthesis of the unique Si@Al 14 Cp* 6 cluster containing a Si@Al 8 core (I), [15] which has since than also been observed in the analogous Si@Al 14 (N-(Dipp)SiMe 3 ) 6 cluster (Dipp = 2,6-iPr 2 C 6 H 3 ) [16] and, although distorted, in the superatomic Si@Al 56 [N(Dipp)SiMe 3 ] 12 cluster (Scheme 1). [17] Other than these, only saturated SiÀ Al compounds including SiAl 3 (II) and SiAl 4 (IV) cores were hitherto reported. [18] The trigonal bipyramidal closo-Al 4 Si cluster (V) synthesised by Schnöckel is the sole example with a silicon atom incorporated into the polyhedral aluminium scaffold.…”

A Re-examination of the Synthesis of Monolayer-Protected Cox(SCH2CH2Ph)m Nanoclusters: Unexpected Formation of a Thiolate-Protected Co(II) T3 Supertetrahedron

“…Recent advances in the synthesis of atomically-precise nanoclusters (APNCs) have resulted in a remarkable increase in the number of structurally-characterized clusters. [1][2][3][4][5][6] Despite this wealth of work, however, structurally characterized AP-NCs exist for only a handful of transition metal (Cu, [7][8][9][10][11][12][13] Ag, 5,[14][15][16] Au, 5,14,17 Pd, [18][19] and Zn 20 ) and main group elements (Al, [21][22][23][24] Ga, 23,25 Ge, [26][27][28][29][30] In, [31][32] and Sn 26,28,[33][34][35][36] ). Expansion to the other transition metals, such as Co, could lead to novel magnetic materials, which could have applications in catalysis, imaging, and quantum computing.…”