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Synthesis and crystal structure of a 6-chloro-nicotinate salt of a one-dimensional cationic nickel(II) coordination polymer with 4,4'-bi-pyridine.


ABSTRACT: A 6-chloro-nicotinate (6-Clnic) salt of a one-dimensional cationic nickel(II) coordination polymer with 4,4'-bi-pyridine (4,4'-bpy), namely, catena-poly[[[tetra-aqua-nickel(II)]-?-4,4'-bi-pyridine-?2 N:N'] bis-(6-chloro-nicotinate) tetra-hydrate], {[Ni(C10H8N2)(H2O)4](C6H3ClNO2)2·4H2O} n or {[Ni(4,4'-bpy)(H2O)4](6-Clnic)2·4H2O} n , (1), was prepared by the reaction of nickel(II) sulfate hepta-hydrate, 6-chloro-nicotinic acid and 4,4'-bi-pyridine in a mixture of water and ethanol. The mol-ecular structure of 1 comprises a one-dimensional polymeric {[Ni(4,4'-bpy)(H2O)4]2+} n cation, two 6-chloro-nicotinate anions and four water mol-ecules of crystallization per repeating polymeric unit. The nickel(II) ion in the polymeric cation is octa-hedrally coordinated by four water mol-ecule O atoms and by two 4,4'-bi-pyridine N atoms in the trans position. The 4,4'-bi-pyridine ligands act as bridges and, thus, connect the symmetry-related nickel(II) ions into an infinite one-dimensional polymeric chain extending along the b-axis direction. In the extended structure of 1, the polymeric chains of {[Ni(4,4'-bpy)(H2O)4]2+} n , the 6-chloro-nicotinate anions and the water mol-ecules of crystallization are assembled into an infinite three-dimensional hydrogen-bonded network via strong O-H?O and O-H?N hydrogen bonds, leading to the formation of the representative hydrogen-bonded ring motifs: tetra-meric R 2 4(8) and R 4 4(10) loops, a dimeric R 2 2(8) loop and a penta-meric R 4 5(16) loop.

SUBMITTER: Politeo N 

PROVIDER: S-EPMC7199272 | biostudies-literature | 2020 May

REPOSITORIES: biostudies-literature

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Synthesis and crystal structure of a 6-chloro-nicotinate salt of a one-dimensional cationic nickel(II) coordination polymer with 4,4'-bi-pyridine.

Politeo Nives N   Pisačić Mateja M   Đaković Marijana M   Sokol Vesna V   Kukovec Boris-Marko BM  

Acta crystallographica. Section E, Crystallographic communications 20200402 Pt 5


A 6-chloro-nicotinate (6-Clnic) salt of a one-dimensional cationic nickel(II) coordination polymer with 4,4'-bi-pyridine (4,4'-bpy), namely, <i>catena</i>-poly[[[tetra-aqua-nickel(II)]-μ-4,4'-bi-pyridine-κ<sup>2</sup> <i>N</i>:<i>N</i>'] bis-(6-chloro-nicotinate) tetra-hydrate], {[Ni(C<sub>10</sub>H<sub>8</sub>N<sub>2</sub>)(H<sub>2</sub>O)<sub>4</sub>](C<sub>6</sub>H<sub>3</sub>ClNO<sub>2</sub>)<sub>2</sub>·4H<sub>2</sub>O} <sub><i>n</i></sub> or {[Ni(4,4'-bpy)(H<sub>2</sub>O)<sub>4</sub>](6-Cl  ...[more]

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