Octakis(epsilon-caprolactam-kappaO)erbium(III) hexaisothiocyanatochromate(III)

Elisaveta V Cherkasova; Eugenia V Peresypkina; Alexander V Virovets; Nina V Podberezskaya; Tatyana G Cherkasova

doi:10.1107/S0108270107015181

Octakis(epsilon-caprolactam-kappaO)erbium(III) hexaisothiocyanatochromate(III)

Acta Crystallogr C. 2007 May;63(Pt 5):m195-8. doi: 10.1107/S0108270107015181. Epub 2007 Apr 21.

Authors

Elisaveta V Cherkasova¹, Eugenia V Peresypkina, Alexander V Virovets, Nina V Podberezskaya, Tatyana G Cherkasova

Affiliation

¹ Kusbass State Technical University, 28 Vesennyaya Street, Kemerovo 650026, Russian Federation.

PMID: 17478899
DOI: 10.1107/S0108270107015181

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.