Core/shell oligometallic template synthesis of macrocyclic hexaoxime |
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Authors: | Akine Shigehisa Sunaga Shuichi Taniguchi Takanori Miyazaki Hayato Nabeshima Tatsuya |
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Institution: | Department of Chemistry, University of Tsukuba, Tsukuba, Ibaraki 305-8571, Japan. |
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Abstract: | A 36-membered macrocyclic hexaoxime was quantitatively obtained by 3 + 3] condensation of dialdehyde 2 with diamine 3 using La3+ (core metal) and Zn2+ (shell metal) as a novel core/shell template, while the yield was very low in the absence of the metal ions. The high yield can be attributed to the efficient formation of a 3:3:1 complex of dialdehyde 2, Zn2+, and La3+, which readily gives the macrocycle keeping the Zn3La core/shell tetranuclear cluster structure. |
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