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Syntheses, crystal structures, spectroscopic and thermal properties of 3D heteronuclear coordination polymers with 4-ethylpyridine and cyanide ligands

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Abstract

Three new hexacyanometallate(III) complexes, namely {[Cd3(4epy)12Cr2(µ-CN)6(CN)6]∙4H2O}n (1), {[Cd3(4epy)12Fe2(µ-CN)6(CN)6]∙4H2O}n (2) and {[Cd3(4epy)12Co2(µ-CN)6(CN)6]∙4H2O}n (3), were synthesized by using 4-ethylpyridine (4epy) ligand and characterized by spectral (FT-IR and Raman), crystallographic (SC-XRD and PXRD), thermal and elemental analyses techniques. Single crystal studies have shown that heterometallic complexes 1–3 form 3D polymers. Each M ion [M = Cr(III) in 1, Fe(III) in 2 and Co(III) in 3] is coordinated by six carbon atoms from cyanide ligands and adjacent metal ions are bridged by cyanide ligands to generate [Cd6M6(CN)12] clusters. Each Cd(II) ion is coordinated by four nitrogen atoms from 4epy ligands and two nitrogen atoms from cyanide ligands to distorted octahedral coordination geometry. In addition, thermal (TG/DTA) properties of the complexes were investigated. Powder X-ray diffraction (PXRD) patterns of the complexes were recorded to control the phase purities.

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Acknowledgements

The authors acknowledge to Scientific and Technological Research Application and Research Center, Sinop University, Türkiye, for the use of the Bruker D8 QUEST diffractometer.

Funding

This work has been financially supported by Eskişehir Osmangazi University, Scientific research Unit [grant no: 2022–2561].

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All authors share equally in writing the main manuscript, preparing the figures and the tables.

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Correspondence to Güneş Süheyla Kürkçüoğlu.

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Kekeç, S., Kürkçüoğlu, G.S., Yeşilel, O.Z. et al. Syntheses, crystal structures, spectroscopic and thermal properties of 3D heteronuclear coordination polymers with 4-ethylpyridine and cyanide ligands. Struct Chem (2023). https://doi.org/10.1007/s11224-023-02249-2

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