Tabatabaee Masoumeh
Department of Chemistry, Islamic Azad University, Yazd Branch, Yazd, Iran.
Acta Crystallogr Sect E Struct Rep Online. 2010 May 15;66(Pt 6):m647-8. doi: 10.1107/S1600536810016843.
The reaction of Ni(NO(3))(2)·6H(2)O with pyridine-2,6-dicarboxylic acid, NaOH and 2-amino-pyrimidine in aqueous solution leads to the formation of the title complex, [Ni(C(7)H(3)NO(4))(C(4)H(5)N(3))(H(2)O)(2)]·H(2)O. The Ni(II) ion is coordinated by one N and two O atoms of the tridentate chelating pyridine-2,6-dicarboxyl-ate anion, one heterocyclic N atom of the 2-amino-pyrimidine ligand, and two water mol-ecules. The resulting geometry for the [NiN(2)O(4)] coordination environment can be described as distorted octa-hedral. One uncoord-inated water mol-ecule completes the asymmetric unit. Extensive O-H⋯O and N-H⋯O hydrogen-bonding inter-actions between the NH(2) group of 2-amino-pyrimidine, carboxyl-ate groups, and coordinated and uncoordinated water mol-ecules contribute to the formation of a three-dimensional supra-molecular structure.
硝酸镍（II）六水合物与吡啶 - 2,6 - 二甲酸、氢氧化钠和2 - 氨基嘧啶在水溶液中反应，生成标题配合物[Ni(C₇H₃NO₄)(C₄H₅N₃)(H₂O)₂]·H₂O。镍（II）离子由三齿螯合的吡啶 - 2,6 - 二甲酸根阴离子的一个氮原子和两个氧原子、2 - 氨基嘧啶配体的一个杂环氮原子以及两个水分子配位。[NiN₂O₄]配位环境的最终几何构型可描述为畸变八面体。一个未配位的水分子构成不对称单元。2 - 氨基嘧啶的氨基、羧酸根基团以及配位和未配位的水分子之间广泛的O - H⋯O和N - H⋯O氢键相互作用有助于形成三维超分子结构。
