Acta Crystallographica Section C

Crystal Structure Communications

Volume 62, Part 2 (February 2006)

metal-organic compounds

hj1086 scheme

Acta Cryst. (2006). C62, m70-m73 [ doi:10.1107/S0108270106001181 ]

Cadmium nitrate coordination polymers with substituted pyridazino[4,5-d]pyridazines

K. V. Domasevitch, P. V. Solntsev and J. Sieler

Abstract: catena-Poly[[aquabis(nitrato- [kappa] ²O,O')cadmium(II)]- [mu] -1,2,3,6,7,8-hexahydrocinnolino[5,4,3-cde]cinnoline- [kappa] N¹: [kappa] N⁶], [Cd(NO₃)₂(C₁₂H₁₂N₄)(H₂O)]_n, (I), and catena-poly[[[bis(nitrato- [kappa] ²O,O')cadmium(II)]- [mu] -2,2,7,7-tetramethyl-1,2,3,6,7,8-hexahydrocinnolino[5,4,3-cde]cinnoline- [kappa] N¹: [kappa] N⁶] chloroform solvate], {[Cd(NO₃)₂(C₁₂H₁₂N₄)]·CHCl₃}_n, (II), are the first structurally examined cadmium-pyridazine coordination compounds. They possess one-dimensional polymeric structures supported by the bidentate bridging function of the cinnolino[5,4,3-cde]cinnoline ligands, which lie about inversion centres. The Cd atoms are seven-coordinated in (I) and six-coordinated in (II), involving two bidentate nitrate groups [Cd-O = 2.229 (2)-2.657 (2) Å], two N atoms of the cinnoline ligands [Cd-N = 2.252 (2)-2.425 (2) Å], and, additionally, a water O atom in (I) [Cd-O = 2.284 (2) Å]. In (I), the coordinated organic and aqua ligands form an intramolecular O-HN hydrogen bond [ON = 2.730 (3) Å].

Formula: [Cd(NO₃)₂(C₁₂H₁₂N₄)(H₂O)] and [Cd(NO₃)₂(C₁₂H₁₂N₄)]·CHCl₃


	Structure factor file (CIF format) (182.3 kbytes) [ doi:10.1107/S0108270106001181/hj1086Isup2.hkl ] Contains datablock I

	Structure factor file (CIF format) (268.4 kbytes) [ doi:10.1107/S0108270106001181/hj1086IIsup3.hkl ] Contains datablock II

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