Wu Wei-Ping, Zeng Feng-Chun, Wu Yu, Peng Jian
Acta Crystallogr Sect E Struct Rep Online. 2007 Dec 6;64(Pt 1):m61. doi: 10.1107/S1600536807062800.
The Cu atom in the title complex, {[Cu(C(6)H(2)N(2)O(4))(H(2)O)(3)]·H(2)O}(n) or {[Cu(L)(H(2)O)(3)]·H(2)O}(n) (L is pyrazine-2,3-dicarbox-yl-ate), displays octa-hedral coordination formed by the ligand L and three coordinated water mol-ecules. The ligand L is tridentate, with one N atom of the pyrazine ring and one O atom of one carboxyl-ate group forming a chelate ring, whereas one O atom from the second carboxyl-ate group is coordinated to another Cu atom. The ligand L links mol-ecules to form an infinite chain parallel to the [101] direction. The chains are further linked through O-H⋯O and O-H⋯N hydrogen bonds involving the water mol-ecules to build up a three-dimensional network.
标题配合物{[Cu(C₆H₂N₂O₄)(H₂O)₃]·H₂O}ₙ或{[Cu(L)(H₂O)₃]·H₂O}ₙ（L为吡嗪-2,3-二羧酸根）中的铜原子呈现由配体L和三个配位水分子形成的八面体配位。配体L是三齿的，吡嗪环的一个氮原子和一个羧酸根基团的一个氧原子形成一个螯合环，而来自第二个羧酸根基团的一个氧原子与另一个铜原子配位。配体L连接分子形成平行于[101]方向的无限链。这些链通过涉及水分子的O-H⋯O和O-H⋯N氢键进一步连接，构建成三维网络。
