Diacridiniumtrans-diaquabis(pyrazine-2,3-dicarboxylato)cobaltate(II) hexahydrate

Hossein Aghabozorg,Jafar Attar Gharamaleki,Mahdieh Parvizi,Zohreh Derikvand

doi:10.1107/s1600536809053628

Abstract

The title compound, (C13H10N)2[Co(C6H2N2O4)2(H2O)2]·6H2O, consists of mononuclear trans-[Co(pz-2,3-dc)2(H2O)2]2− complex anions, (acrH)+ cations and uncoordinated water molecules (acr is acridine and pz-2,3-dcH2 is pyrazine-2,3-dicarboxylic acid). The CoII atom, which lies on a crystallographic center of symmetry, has a slightly distorted octahedral coordination environment, with two N and two O atoms from the (pz-2,3-dc)2− ligands in the equatorial plane and with two water molecules in axial positions. In the crystal, the components are held together by two distinct N—H⋯O and C—H⋯O hydrogen bonds with R 2 2(8) graph-sets. The coordinated and uncoordinated water molecules are also involved in O—H⋯O hydrogen bonds, which lead to the formation of layers with R 3 3(12) graph-set motifs. Extensive π–π stacking interactions between parallel aromatic rings of the acridinium ions, with distances ranging from 3.533 (1) to 3.613 (1) Å, occur in the structure.

Highlights

The title compound, (C13H10N)2[Co(C6H2N2O4)2(H2O)2]6H2O, consists of mononuclear trans-[Co(pz-2,3-dc)2(H2O)2]2 complex anions,+ cations and uncoordinated water molecules
The CoII atom, which lies on a crystallographic center of symmetry, has a slightly distorted octahedral coordination environment, with two N and two O
The coordinated and uncoordinated water molecules are involved in O—H O hydrogen bonds, which lead to the formation of layers with R33(12) graph-set motifs

Summary

Structure Reports

Mahdieh Parvizia and Zohreh Derikvandc a Faculty of Chemistry, Islamic Azad University, North Tehran Branch, Tehran, Iran, Young Researchers Club, Islamic Azad University, North Tehran Branch, Tehran, Iran, and cDepartment of Chemistry, Islamic Azad University, Khorramabad Branch, Khorramabad, Iran. The title compound, (C13H10N)2[Co(C6H2N2O4)2(H2O)2]6H2O, consists of mononuclear trans-[Co(pz-2,3-dc)2(H2O)2]2 complex anions, (acrH)+ cations and uncoordinated water molecules (acr is acridine and pz-2,3-dcH2 is pyrazine2,3-dicarboxylic acid). The CoII atom, which lies on a crystallographic center of symmetry, has a slightly distorted octahedral coordination environment, with two N and two O atoms from the (pz-2,3-dc) ligands in the equatorial plane and with two water molecules in axial positions. The components are held together by two distinct N—H O and C—H O hydrogen bonds with R22(8) graph-sets. The coordinated and uncoordinated water molecules are involved in O—H O hydrogen bonds, which lead to the formation of layers with R33(12) graph-set motifs.

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