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Synthesis, crystal structure and thermal properties of bis-(aceto-nitrile-κN)bis-(3-bromo-pyridine-κN)bis-(thio-cyanato-κN)cobalt(II).

ABSTRACT: Single crystals of the title compound, [Co(NCS)2(C5H4BrN)2(C2H3N)2], were obtained by the reaction of Co(NCS)2 with 3-bromo-pyridine in aceto-nitrile. The CoII cations lie on crystallographic inversion centers and are coordinated by two N-bonded thio-cyanate anions, two 3-bromo-pyridine and two aceto-nitrile ligands thereby forming slightly distorted CoN6 octa-hedra. In the crystal, these complexes are linked by C-H⋯S and C-H⋯N hydrogen bonds into a three-dimensional network. In the direction of the crystallographic b-axis, the complexes are arranged into columns with neighboring 3-bromo-pyridine ligands stacked onto each other, indicating π-π inter-actions. The CN stretching vibration of the thio-cyanate anions is observed at 2066 cm-1, in agreement with the presence of only N-bonded anionic ligands. TG-DTA measurements reveal that in the first mass loss the aceto-nitrile ligands are removed and that in the second step, half of a 3-bromo-pyridine ligand is lost, leading to the formation of a polymeric compound with the composition [(Co(NCS)2)2(C5H4BrN)3] n already reported in the literature.

SUBMITTER: Krebs C 

PROVIDER: S-EPMC9815133 | biostudies-literature | 2023 Jan

REPOSITORIES: biostudies-literature

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Synthesis, crystal structure and thermal properties of bis-(aceto-nitrile-κ<i>N</i>)bis-(3-bromo-pyridine-κ<i>N</i>)bis-(thio-cyanato-κ<i>N</i>)cobalt(II).

Krebs Christoph C   Jess Inke I   Näther Christian C  

Acta crystallographica. Section E, Crystallographic communications 20230101 Pt 1

Single crystals of the title compound, [Co(NCS)<sub>2</sub>(C<sub>5</sub>H<sub>4</sub>BrN)<sub>2</sub>(C<sub>2</sub>H<sub>3</sub>N)<sub>2</sub>], were obtained by the reaction of Co(NCS)<sub>2</sub> with 3-bromo-pyridine in aceto-nitrile. The Co<sup>II</sup> cations lie on crystallographic inversion centers and are coordinated by two N-bonded thio-cyanate anions, two 3-bromo-pyridine and two aceto-nitrile ligands thereby forming slightly distorted CoN<sub>6</sub> octa-hedra. In the crystal, thes  ...[more]

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