title: Core/shell oligometallic template synthesis of macrocyclic hexaoxime.
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.
authors.affiliation: Department of Chemistry, University of Tsukuba, Tsukuba, Ibaraki 305-8571, Japan.
authors.forename: Shigehisa
authors.initials: S
authors.lastname: Akine
authors.forename: Shuichi
authors.initials: S
authors.lastname: Sunaga
authors.forename: Takanori
authors.initials: T
authors.lastname: Taniguchi
authors.forename: Hayato
authors.initials: H
authors.lastname: Miyazaki
authors.forename: Tatsuya
authors.initials: T
authors.lastname: Nabeshima
mesh_terms: D018360:Crystallography, X-Ray; D003500:Cyclization; D006860:Hydrogen Bonding; D007811:Lanthanum / Q000737:chemistry*; D047028:Macrocyclic Compounds / Q000138:chemical synthesis* / Q000737:chemistry; D008958:Models, Molecular; D015394:Molecular Structure; D009942:Organometallic Compounds / Q000138:chemical synthesis* / Q000737:chemistry; D010091:Oximes / Q000138:chemical synthesis* / Q000737:chemistry; D013997:Time Factors; D015032:Zinc / Q000737:chemistry*
chemical_list: D047028:Macrocyclic Compounds; D009942:Organometallic Compounds; D010091:Oximes; D007811:Lanthanum; D015032:Zinc