title: Tetrakis(mu-anthracene-9-carboxylato)-kappa4O:O';kappa3O,O':O';kappa3O:O,O'-bis[(anthracene-9-carboxylato-kappa2O,O')(1,10-phenanthroline-kappa2N,N')erbium(III)]: effects of a noncoordinating anthracene ligand ring system on the final structure of a coordination complex.
abstract: The title complex, [Er(2)(C(15)H(9)O(2))(6)(C(12)H(8)N(2))(2)], has a centrosymmetric binuclear cage structure in which the two Er(III) atoms are both nine-coordinated and are bridged by four bulky anthracene-9-carboxylate (L) ligands, with a nonbonding Er...Er separation of 3.9041 (2) A. The L groups coordinate each Er(III) atom in three different ways. The results reported here reveal that the bulky anthracene skeleton of the L ligand plays an important role in the formation of the complex by virtue of intra- and intermolecular pi-pi stacking and C-H...pi interactions.
authors.affiliation: Zhengzhou University of Light Industry, Henan Provincial Key Laboratory of Surface and Interface Science, Henan, Zhengzhou 450002, People's Republic of China. chunsenliu@zzuli.edu.cn
authors.forename: Chun-Sen
authors.initials: CS
authors.lastname: Liu
authors.forename: Liang-Qi
authors.initials: LQ
authors.lastname: Guo
authors.forename: Li-Fen
authors.initials: LF
authors.lastname: Yan
authors.forename: Jun-Jie
authors.initials: JJ
authors.lastname: Wang