Acta Cryst. (2008). E64, m333-m334  [ doi:10.1107/S1600536808000433 ]

Poly[bis(acetone-O)bis{₃-1-[(5-chloro-2-oxidophenyl)diazenyl]-2-naphtholato-⁴O:O,O':O'}sodium(I)chromium(III)]

S. Ito, Y. Sato and J. Mizuguchi

Abstract: The title compound, [CrNa(C₁₆H₉ClN₂O₂)₂(C₃H₆O)₂]_n, is an azo-Cr^III complex polymer that is used as a charge-control agent in electrophotography. The monomeric unit is composed of octahedral Cr^III and Na^I units, and is characterized by twofold rotation symmetry. The Cr^III atom is chelated by two N and four O atoms from two [(5-chloro-2-oxidophenyl)diazenyl]-2-naphtholate ligands. The ligand anion exists in the cis form. The Na^I atom is coordinated by two phenoxy O atoms from a neighboring Cr^III unit, two naphthoxy O atoms from another neighboring Cr^III unit and two O atoms from acetone molecules. The dinuclear complex forms a one-dimensional polymer running along the c axis.

Online 11 January 2008

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