Khandar Ali Akbar, Afkhami Farhad Akbari, Krautscheid Harald, Kristoffersen Kenneth Aase, Atioğlu Zeliha, Akkurt Mehmet, Görbitz Carl Henrik
Young Researchers and Elite Club, Tabriz Branch, Islamic Azad University, Tabriz, Iran.
Universität Leipzig, Fakultätfür Chemie und Mineralogie, Johannisallee 29, D-04103 Leipzig, Germany.
Acta Crystallogr E Crystallogr Commun. 2017 Apr 13;73(Pt 5):698-701. doi: 10.1107/S2056989017005308. eCollection 2017 May 1.
The title compounds, [CdBr(CHNO)]·CHOH, (I), and [CdI(CHNO)], (II), are cadmium bromide and cadmium iodide complexes of the ligand ()-'-(pyridin-2-yl-methyl-ene)picolinohydrazide. Complex (I) crystallizes as the methanol monosolvate. In both compounds, the Cd cation is ligated by one O atom and two N atoms of the tridentate ligand, and by two bromide anions forming a BrNO penta-coordination sphere for (I), and by two iodide anions forming an INO penta-coordination sphere for (II), both with a distorted square-pyramidal geometry. In the crystal of complex (I), mol-ecules are linked by pairs of N-H⋯O and O-H⋯Br hydrogen bonds, involving the solvent mol-ecule, forming dimeric units, which are linked by C-H⋯Br hydrogen bonds forming layers parallel to (101). In the crystal of complex (II), mol-ecules are linked by N-H⋯I hydrogen bonds, forming chains propagating along [010]. In complex (II), measured at room temperature, the two iodide anions are each disordered over two sites; the refined occupancy ratio is 0.75 (2):0.25 (2).
标题化合物[CdBr(CHNO)]·CHOH（I）和[CdI(CHNO)]（II）是配体（）-'-（吡啶-2-基亚甲基）吡啶甲酰肼的溴化镉和碘化镉配合物。配合物（I）以甲醇单溶剂合物形式结晶。在这两种化合物中，Cd阳离子通过三齿配体的一个O原子和两个N原子以及两个溴离子配位，形成（I）的BrNO五配位球，或通过两个碘离子配位，形成（II）的INO五配位球，二者均具有扭曲的四方锥几何构型。在配合物（I）的晶体中，分子通过N-H⋯O和O-H⋯Br氢键对相连，涉及溶剂分子，形成二聚单元，这些二聚单元通过C-H⋯Br氢键相连，形成平行于（101）的层。在配合物（II）的晶体中，分子通过N-H⋯I氢键相连，形成沿[010]方向延伸的链。在配合物（II）中，在室温下测量，两个碘离子各自在两个位置上无序；精修的占有率比为0.75 (2):0.25 (2)。
