title: Bis{6,6'-dimeth-oxy-2,2'-[ethane-1,2-diyl-bis(imino-methyl-ene)]diphenolato(1.5-)-κO,N,N',O'}erbium(III).
abstract: In the title compound, [Er(C(18)H(22.5)N(2)O(4))(2)], the Er atom is located on a twofold rotation axis and is eight-coordinated by four O atoms and four N atoms from two symmetry-related 6,6'-dimethoxy-2,2'-(ethane-1,2-diyldiiminodimethylene)diphenolate(1.5-) ligands. Due to disorder of one phenolate H atom with half-occupation, the overall charge of one tetradentate ligand is -1.5. The ligand molecules are stabilised by intramolecular N-H⋯O and O-H⋯O hydrogen bonds and are linked into a chain parallel to the a axis by a C-H⋯O hydrogen bond. Neighbouring chains are connected by van der Waals forces, resulting in a three-dimensional network.
authors.forename: Hai-Tao
authors.initials: HT
authors.lastname: Xia
authors.forename: De-Fu
authors.initials: DF
authors.lastname: Rong
authors.forename: Ying-Ying
authors.initials: YY
authors.lastname: Zhang
authors.forename: Shu-Ping
authors.initials: SP
authors.lastname: Yang
authors.forename: Da-Qi
authors.initials: DQ
authors.lastname: Wang