Acta Cryst. (2007). E63, m1185-m1187  [ doi:10.1107/S1600536807012536 ]

Poly[(₃-isonicotinato-³N:O:O')(₄-tetraoxidochromato-⁵O:O':O',O'':O'')erbium(III)]

J.-H. Liu, C.-F. Huang and M. Li

Abstract: The title compound, [Er{CrO₄}(C₆H₄NO₂)]_n or [CrEr(C₆H₄NO₂)O₄]_n, obtained by a hydrothermal reaction, is a three-dimentional polymer consisting of inorganic layers of Er^III ions and [CrO₄]^2- anions pillared by organic isonicotinate (IN) ligands. Each Er^III ion is eight-coordinated by one N atom from one IN ligand, two carboxylate O atoms from two IN ligands and five O atoms from four [CrO₄]^2- anions. The inorganic layer consists of [Er(CrO₄)]_n chains running along the b direction, linked together in the a direction. Each [CrO₄]^2- anion in the structure binds four Er^III ions in a ₄-pentadentate coordination mode.

Online 4 April 2007

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