Tetrakis(2,4,6-triamino-1,3,5-triazin-1-ium) tris(pyridine-2,6-dicarboxylato)calcate(II) hexahydrate
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چکیده
The title compound, (C(3)H(7)N(6))(4)[Ca(C(7)H(3)NO(4))(3)]·6H(2)O or (tataH)(4)[Ca(pydc)(3)]·6H(2)O (where tata is 2,4,6-triamino-1,3,5-triazine and pydcH(2) is pyridine-2,6-dicarboxylic acid), was obtained by reaction of Ca(NO(3))(2)·4H(2)O with the proton-transfer compound (tataH)(2)(pydc) in aqueous solution. The [Ca(pydc)(3)](4-) anion has twofold crystallographic symmetry. It is a nine-coordinate Ca(II) complex with a distorted tricapped trigonal-prismatic coordination geometry. The structure also contains four tataH(+) cations and six uncoordinated water mol-ecules. There are extensive O-H⋯O, O-H⋯N, N-H⋯O, N-H⋯N and C-H⋯O hydrogen bonds in the crystal structure.
منابع مشابه
Hydroxonium hydrate tris(2,4,6-triamino-1,3,5-triazin-1-ium) bis[bis(pyridine-2,6-dicarboxylato)cuprate(II)] pyridine-2,6-dicarboxylic acid hexahydrate
The reaction of copper(II) nitrate hexa-hydrate with pyridine-2,6-dicarboxylic acid (pydcH(2)) and 2,4,6-triamino-1,3,5-triazine (melamine) in aqueous solution in a 1:2:2 molar ratio gave the title compound, (H(5)O(2))(C(3)H(7)N(6))(3)[Cu(C(7)H(3)NO(4))(2)](2)·C(7)H(5)NO(4)·6H(2)O. The hydroxonium hydrate (H(5)O(2))(+), also known as the Zundel cation, resides on a twofold rotation axis. The O-...
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The title compound, (C(3)H(7)N(6))(2)[Zr(C(7)H(3)NO(4))(3)]·4H(2)O or (tataH)(2)[Zr(pydc)(3)]·4H(2)O (tata is 2,4,6-triamino-1,3,5-triazine and pydcH(2) is pyridine-2,6-dicarboxylic acid), was obtained by reaction between pydcH(2), tata and zirconyl chloride octa-hydrate in aqueous solution. In the structure, the Zr(IV )atom is nine-coordinated by three (pydc)(2-) groups, resulting in an anioni...
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In the title compound, (C(3)H(7)N(6))(2)[Cu(C(7)H(3)NO(5))(2)]·6H(2)O, the coordination geometry of the Cu(II) atom can be described as distorted octa-hedral. The equatorial plane is defined by four O atoms from two 4-hydroxy-pyridine-2,6-dicarboxyl-ate ligands. The axial positions are occupied by the N atoms of the same ligands. There is an extensive three-dimensional hydrogen-bond network rei...
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The title compound, (C(3)H(7)N(6))(2)[Co(H(2)O)(6)][Co(C(7)H(3)NO(4))(2)](2)·4H(2)O, or (tataH)(2)[Co(H(2)O)(6)][Co(pydc)(2)](2)·4H(2)O (where tata is 2,4,6-triamino-1,3,5-triazine and pydc is pyridine-2,6-dicarboxylic acid), was obtained by reaction of Co(NO(3))(2)·6H(2)O with the proton-transfer compound (tataH)(2)(pydc) in aqueous solution. The [Co(pydc)(2)](2-) anion is a six-coordinate Co(...
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