Abstract
In the structure of the title compound, [Cd(H2O)6](C6H2N3O7)2·H2O, the CdII ion is located on an inversion center and is coordinated by six water molecules in an octahedral geometry. The picrate anions have no coordination interactions with the CdII ion. The three nitro groups are twisted away from the attached benzene ring, making dihedral angles of 17.89 (3), 27.94 (4) and 13.65 (3)°. There are numerous O—H⋯O hydrogen bonds in the crystal structure, involving coordinated and uncoordinated water molecules.
Highlights
In the structure of the title compound, [Cd(H2O)6](C6H2N3O7)2ÁH2O, the CdII ion is located on an inversion center and is coordinated by six water molecules in an octahedral geometry
Crystal structures have been reported for NH4 and K picrates (Maartmann-Moe, 1969), thallium picrate (Herbstein et al, 1977), manganese picrate (Liu et al, 2008) and zinc picrate (Natarajan et al, 2008)
Symmetry codes: (ii) −x+1/2, y+1/2, z; (iii) −x+1/2, y, −z+1/2; (iv) x−1/2, −y+1/2, −z; (v) −x+1, −y+1, −z; (vi) x, y+1/2, −z+1/2
Summary
In the structure of the title compound, [Cd(H2O)6](C6H2N3O7)2ÁH2O, the CdII ion is located on an inversion center and is coordinated by six water molecules in an octahedral geometry. The picrate anions have no coordination interactions with the CdII ion. There are numerous O— HÁ Á ÁO hydrogen bonds in the crystal structure, involving coordinated and uncoordinated water molecules. Related literature Picric acid forms salts with many organic and metallic cations, see: Gartland et al (1974). Crystal structures have been reported for NH4 and K picrates (Maartmann-Moe, 1969), thallium picrate (Herbstein et al, 1977), manganese picrate (Liu et al, 2008) and zinc picrate (Natarajan et al, 2008). For bond angles in picric acid, see: Yang et al (2001)
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