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

Kekeç S., Kürkçüoğlu G. S., Yeşilel O. Z., Şahin O.

Structural Chemistry, vol.35, no.4, pp.1075-1083, 2024 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 35 Issue: 4
  • Publication Date: 2024
  • Doi Number: 10.1007/s11224-023-02249-2
  • Journal Name: Structural Chemistry
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Academic Search Premier, Chemical Abstracts Core, Chimica, INSPEC
  • Page Numbers: pp.1075-1083
  • Keywords: 3D, 4-ethylpyridine, Cadmium(II), Coordination polymers, Hexacyanochromate(III), Hexacyanocobaltate(III), Hexacyanoferrate(III)
  • Eskisehir Osmangazi University Affiliated: Yes

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.