Intramolecularly Stabilized o-Carboranyl Aluminum Complexes: Synthesis, Characterization, and X-ray Structural Studies

被引：1
|
作者：
Sohn, Honglae [1 ]
Lee, Jong-Dae [1 ]
机构：
[1] Chosun Univ, Coll Nat Sci, Dept Chem, Gwangju 61452, South Korea
来源：
CRYSTALS | 2023年 / 13卷 / 06期
基金：
新加坡国家研究基金会;
关键词：
C; N-chelate ligand; 2-dimethylaminomethyl-o-carborane; organoaluminum complexes; X-ray crystallography; intramolecularly coordination; TERTIARY AMINE; MOLECULAR-STRUCTURE; CRYSTAL-STRUCTURES; LEWIS PAIRS; ORGANOALUMINUM; ORGANOGALLIUM; DERIVATIVES; ADDUCTS; LIGAND; TRIMETHYLALUMINUM;
D O I：
10.3390/cryst13060877
中图分类号：
O7 [晶体学];
学科分类号：
0702 ; 070205 ; 0703 ; 080501 ;
摘要：
The chelating aluminum complex [2-(Me2NCH2)C2B10H10]AlX2 (X = Br 3, CH3 4) was synthesized using 2-dimethylaminomethyl-o-carboranyl lithium (LiCab(N), 2) with aluminum tribromide (AlBr3) or dimethylaluminum bromide (Me2AlBr), resulting in a modest yield. Compound 4 was obtained by reacting compound 3 with methyllithium (CH3Li) in toluene. All compounds were characterized using infrared (IR) spectroscopy; H-1, B-11, C-13 nuclear magnetic resonance (NMR) spectroscopy; and X-ray crystallography. X-ray structural studies of Cab(N)AlBr(2) (3) and Cab(N)AlMe(2) (4) (Cab(N) = 2-dimethylaminomethyl-o-carboranyl) indicated that the aluminum atom was located at the center of a distorted tetrahedron. Crystal structures of Cab(N)AlBr(2) (3) [a = 8.9360(3) & ANGS;, b = 12.0358(9) & ANGS;, c = 14.7730(4) & ANGS;, & alpha; = & beta; = & gamma; = 90 & DEG;] and Cab(N)AlMe(2) (4) [a = 8.9551(3) & ANGS;, b = 11.9126(9) & ANGS;, c = 14.7711(4) & ANGS;, & alpha; = & beta; = & gamma; = 90 & DEG;] were obtained. The reactivity of aluminum complexes 3 and 4 with Lewis bases, such as H2O, pyridine, alkylamines, and arylamines, confirmed their rapid decomposition due to the strong Lewis acidity of aluminum metals.
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页数：10
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