title: Octakis(epsilon-caprolactam-kappaO)erbium(III) hexaisothiocyanatochromate(III).
abstract: The title compound, [Er(C(6)H(11)NO)(8)][Cr(NCS)(6)], is a new structure type for [Ln(epsilon-caprolactam)(8)][Cr(NCS)(6)], where Ln is a lanthanide. There are two independent cations and two independent anions in the asymmetric unit. The Er atom is in a distorted square-antiprismatic environment of eight O atoms of the organic ligands; Er-O bond distances are in the range 2.29-2.44 A. The coordination environment of the Cr atom is a slightly distorted octahedron; Cr-N bond distances vary from 1.99 to 2.01 A. The mutual packing of the cations and the anions follows a distorted NaCl motif. One cation has the Er atom on a twofold axis and one of the anions has the Cr atom on a twofold axis.
authors.affiliation: Kusbass State Technical University, 28 Vesennyaya Street, Kemerovo 650026, Russian Federation.
authors.forename: Elisaveta V
authors.initials: EV
authors.lastname: Cherkasova
authors.forename: Eugenia V
authors.initials: EV
authors.lastname: Peresypkina
authors.forename: Alexander V
authors.initials: AV
authors.lastname: Virovets
authors.forename: Nina V
authors.initials: NV
authors.lastname: Podberezskaya
authors.forename: Tatyana G
authors.initials: TG
authors.lastname: Cherkasova