A Neutral Ga₆ Octahedron: Synthesis, Structure, and Aromaticity

Abstract

Potassium graphite reduction of L:Ga(Mes)Cl(2) [L: = :C{(i-Pr)NC(Me)}(2), Mes = 2,4,6-Me(3)C(6)H(2)] (1) in hexane yields the organogallium dimer L:(Mes)(Cl)Ga-Ga(Cl)(Mes):L (2), while potassium reduction of 1 in toluene affords the neutral aromatic Ga(6) octahedron L:Ga[Ga(4)Mes(4)]Ga:L (3).

Group 13 Ligand Supported Heavy‐Metal Complexes: First Structural Evidence for Gallium–Lead and Gallium–Mercury Bonds

“…There are two different Pb À O distances found in molecule 2 b. The Pb1 À O6 distance (2.652(6) ) is slightly shorter than that of Pb1ÀO3 (2.665(6) ) and it is longer than the PbÀO distance (2.638(6) and 2.595 (6) …”

“…Complex 3 b was obtained in large yield when the bright yellow slurry of 3 a in toluene was heated under reflux for 2 min then stored at À30 8C for a week. Yield of 3 b: 76 % (based on HgA C H T U N G T R E N N U N G (SC 6 …”

“…[3][4][5][6] The recent use of N-heterocyclic carbene (NHC) as a ligand in main-group chemistry led to the successful isolation of molecules [LE=EL] (E= Si, BH, As, or Ge; L = DC[N(2,6-iPr 2 C 6 H 3 )CH] 2 ), [4] L'P À PL' (L' = DC[N(2,4,6-Me 3 -C 6 H 2 )CH] 2 ), [5] and [(L'') 2 A C H T U N G T R E N N U N G (Mes) 4 Ga 6 ] (Mes= 2,4,6-Me 3 -C 6 H 2 ; L'' = DC[NA C H T U N G T R E N N U N G (iPr 2 )CMe] 2 ), [6] with an unusual interaction between main-group elements at low oxidation states.…”

Hauptgruppenmetallcluster stabilisiert durch N‐heterocyclische Carbene

“…[10] In der Tat erwies sich dieser Ansatz nun bei der Synthese eines neuen deltaedrischen Galliumclusters als erfolgreich. [11] Die Reduktion des Ga …”

“…[18] Quantenchemische Methoden helfen beim Versuch, die Bindungsverhältnisse in solchen Clustern zu verstehen und systematische Zusammenhänge aufzudecken. [11,[13][14][15][16][17][18][19][20] Beispielsweise erklärt sich die Stabilität des [Ga 8 R 8 ] 2À -Clusters 4 durch eine Orbitalabfolge analog der im closo-Cluster B 8 H 8 2À . [14] Viele Galliumcluster haben jedoch eine von den Polyboranen abweichende elektronische Struktur.…”