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Aluminum Substituted Boroxine and the Intermediate Based on N-aryl Substituted β-Diketiminato Ligand: Synthesis, Characterization and Reactivity Studies
Author NameAffiliationE-mail
HAO Peng-Fei School of Chemical Engineering and Environment, Beijing Institute of Technology, Beijing 100081, China  
YANG Jun-Juan School of Chemical Engineering and Environment, Beijing Institute of Technology, Beijing 100081, China  
YANG Zhi School of Chemical Engineering and Environment, Beijing Institute of Technology, Beijing 100081, China zhiyang@bit.edu.cn 
MA Xiao-Li School of Chemical Engineering and Environment, Beijing Institute of Technology, Beijing 100081, China maxiaoli@bit.edu.cn 
YANG Ying School of Chemistry and Chemical Engineering, Central South University, Changsha 410083, China  
LI Jia-Rong School of Chemical Engineering and Environment, Beijing Institute of Technology, Beijing 100081, China  
Abstract: The reaction of LAlH2(L=(Z)-4-[(2,6-diisopropylphenyl)amino]pent-3-en-2-ylidene-2,6-diisopropylaniline) (1) with thiophen-2-ylboronic acid and benzo[b]thiophen-2-ylboronic acid resulted in the boroxine-linked aluminum compounds LAl[OB(2-thiophen)]2(μ-O) (2) and LAl[OB(2-benzo[b]thiophen)]2(μ-O) (3), respectively. LAl[OB(2,6-CH3C6H4)OH]2 (4) was synthesized by the reaction of 1 with 2, 6-dimethylphenylboronic acid. 4 is the intermediate analogue of the reaction to 2 and 3, which we postulated for the formation of 2 and 3. All compounds were characterized by IR, 1H NMR and elemental analysis. Furthermore, compounds 2 and 4 were characterized by single-crystal X-ray diffraction studies. Compound 2 crystallizes in the triclinic space group P1 while 4 crystallizes in the monoclinic P21/c space group. For the structure of 2, one aluminum atom, two boron atoms, and three oxygen atoms form a six-membered planar AlB2O3 ring. The central aluminum atom is located in the spirocyclic center where the inorganic AlB2O3 ring is fused to the organic C3N2 part. However, compound 4 consists of the metallic-nonmetallic chain of (H)O-B-O-Al-O-B-O(H) as a backbone. CCDC: 981567, 2; 981568, 4.
Keywords: β-diketiminato ligand  hybrid ring systems  organoboronic acid  aluminum compound
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HAO Peng-Fei,YANG Jun-Juan,YANG Zhi,MA Xiao-Li,YANG Ying,LI Jia-Rong.Aluminum Substituted Boroxine and the Intermediate Based on N-aryl Substituted β-Diketiminato Ligand: Synthesis, Characterization and Reactivity Studies[J].Chinese Journal of Inorganic Chemistry,2014,30(12):2811-2817.
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Chinese Journal of Inorganic Chemistry