title: A unique Mn2Gd2 tetranuclear compound of p-tert-butylthiacalix[4]arene.
abstract: A calixarene complex with tetragonal Mn(II 2Gd(III)2 tetranuclear units was synthesized in solvothermal conditions, where the addition of a small amount of water was crucial for the formation of the target compound. In the structure, two tail-to-tail p-tert-butylthiacalixarenes are located in a C-shaped mode with a dihedral angle of 14.29 degrees but not in the conventional antiparallel arrangement and form a sandwich-like subunit with an in-between Mn2Gd2 unit. Both calixarenes assume similar cone shapes of C2v symmetry but are pinched to different extents. The extended structure is constructed by supramolecular stacking of the sandwich-like units with the interstices filled by the solvent. The magnetic property of the title compound has been examined.
authors.affiliation: State Key Laboratory of Rare earth Resource Utilization, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, People's Republic of China.
authors.forename: Yanfeng
authors.initials: Y
authors.lastname: Bi
authors.forename: Yanling
authors.initials: Y
authors.lastname: Li
authors.forename: Wuping
authors.initials: W
authors.lastname: Liao
authors.forename: Hongjie
authors.initials: H
authors.lastname: Zhang
authors.forename: Deqian
authors.initials: D
authors.lastname: Li