Diaquabis(pyridine‐2‐carboxamide‐κ2N1,O2)nickel(II) disaccharinate tetrahydrate |
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Authors: | Fatma Tezcan Hümeyra Paaolu Okan Z Yeilel Halis
lmez Hasan Ibudak Orhan Büyükgüngr |
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Abstract: | In the crystal structure of the title compound, Ni(C6H6N2O)2(H2O)2](C7H4NO3S)2·4H2O or Ni(pia)2(H2O)2](sac)2·4H2O (pia is picolinamide or pyridine‐2‐carboxamide, and sac is the saccharinate anion), the Ni2+ cation, located on a centre of symmetry, is coordinated by two symmetry‐related aqua ligands together with a pair of symmetry‐related bidentate pia molecules and exhibits a distorted octahedral environment. The unique unligated sac anion in the asymmetric unit resides on a general position and has a single negative charge. The coordinated water molecules link the sac ions to the metal complex via O—H?O hydrogen bonds. In addition, the sac ions are linked to the metal complex via intermolecular π–π interactions between the benzene ring of the sac ion and the pyridine ring of a pia ligand. Each uncoordinated water molecule is hydrogen bonded to sac moieties through O—H?O and O—H?N hydrogen bonds. |
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