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Updated: Jun 1, 2026

Chemical Precipitation Method for the Synthesis of Nb2O5 Modified Bulk Nickel Catalysts with High Specific Surface Area
Published on: February 19, 2018
Bis(6'-carb-oxy-2,2'-bipyridine-6-carboxyl-ato-κN,N',O)nickel(II) tetra-hydrate
Huimin Wang1, Haiquan Su, Jinjin Xu
1School of Chemistry and Chemical Engineering, Inner Mongolia University, Hohhot 010021, People's Republic of China.
Abstract:
In the title compound, [Ni(C(12)H(7)N(2)O(4))(2)]·4H(2)O, the Ni atom is located at the centre of a distorted octa-hedron, formed by four N atoms and two O atoms from the same two tridentating chelated 6-carb-oxy-2,2'-bipyridine-6'-carboxyl-ate (L) ligands. Face-to-face π-stacking inter-actions between inversion-related pyridine rings with centroid-centroid distances of 3.548 (3) and 3.662 (3) Å (perpendicular distances between the respective rings are 3.314 and 3.438 Å) are found. Inter-molecular O-H⋯O hydrogen bonds between water mol-ecules and L ligands form R(5) (3)(10), R(6) (5)(14) and R(5) (5)(12) rings and also a centrosymmetric cage-like unit of water mol-ecules, which link eight adjacent Ni(II) centers, forming a three-dimensional framework.
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