Synthesis and Characterization of Heterobimetallic Al鈥揙鈥揅u Complexes toward Models for Heterogeneous Catalysts on Metal Oxide Surfaces

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• 作者：Bin Li ; Chunyan Zhang ; Ying Yang ; Hongping Zhu ; Herbert W. Roesky
• 刊名：Inorganic Chemistry
• 出版年：2015
• 出版时间：July 6, 2015
• 年：2015
• 卷：54
• 期：13
• 页码：6641-6646
• 全文大小：311K
• ISSN：1520-510X

文摘

The 尾-diketiminato aluminum-monohydroxide and -dihydroxide were reacted with tetrameric (CuMes)₄ (Mes = 2,4,6-Me₃C₆H₂) to prepare Cu(I) complexes bearing the Al鈥揙鈥揅u moiety. All complexes are characterized by elemental analysis, nuclear magnetic resonance, and single-crystal X-ray diffraction. The reaction of aluminum鈥搈onohydroxide LAlR(OH) (L = HC[C(Me)N(Ar)]₂; Ar = 2,6-iPr₂C₆H₃; R = Me, Et) with (CuMes)₄ afforded the Cu(I) alumoxane [LAl(R)OCu路MesCu]₂ (R = Me, 1; Et, 2). Using the aluminum-dihydroxide LAl(OH)₂ as the precursor, the dimeric [LAl(OH)OCu路MesCu]₂ (3) was isolated, bearing one reactive OH group on each Al center. When the reaction of LAl(OH)₂ with (CuMes)₄ was carried out at 70 掳C, the dimeric octanuclear Cu(I) compound [LAl(OCu路MesCu)₂]₂ (4) was formed, where two residual Mes groups are located at the neighboring position on each of the two (OCu路MesCu)₂ squares. Compound 4 can be alternatively obtained by reacting 3 with 1 equiv of (CuMes)₄ to demonstrate the stepwise assembly of the Cu(I) alumoxanes.