Unprecedented deca-, penta- and poly-heteronuclear complexes with hexacyanometallates and 2-(hydroxymethyl)pyridine


Creative Commons License

Sayin E., KÜRKÇÜOĞLU G. S. , YEŞİLEL O. Z. , Sahin O.

POLYHEDRON, vol.210, 2021 (Journal Indexed in SCI) identifier identifier

  • Publication Type: Article / Article
  • Volume: 210
  • Publication Date: 2021
  • Doi Number: 10.1016/j.poly.2021.115535
  • Title of Journal : POLYHEDRON
  • Keywords: Hexacyanocobaltate(III) complex, Hexacyanoferrate(III) complex, 2-(Hydroxymethyl)pyridine complex, Coordination polymer, Heteronuclear complex, CRYSTAL-STRUCTURES, COORDINATION POLYMERS, MAGNETIC-PROPERTIES, CYANIDE COMPLEXES, FE, NI, CO, FAMILY, TETRACYANONICKELATE(II), TRANSITION

Abstract

The reactions of hexacyanometallates (Fe(III) and Co(III)) and 2-(hydroxymethyl)pyridine (hmpy) with ZnCl2 and CdCl2 affords the decanuclear [Cd-6(hmpy)(12)Fe-2(mu-CN)(8)(CN)(4)Fe-2(mu-CN)(4)(CN)(8)] complex (1), the pentanu-clear [Cd-3(hmpy)(6)Co-2(mu-CN)(6)(CN)(6)] cage complex (2) and the 3D framework [Zn(hmpy)(2)Zn-2(hmpy)(2)Co-2(mu-CN)(8)(CN)(4)]n (3). These new cyanide-bridged heteronuclear complexes have been characterised by FT-IR and Raman spectra, together with thermal and elemental analyses. Their structures have been determined by single crystal X-ray diffraction (SC-XRD) and powder X-ray diffraction (PXRD) analyses. In 1, the Cd(II) and Fe(III) centers are arranged alternately at the four corners of a rhombic core, and the cyanide ligands coordinate to the four metal centers of this core in the bridging mode. Adjacent tetranuclear rhombic cores further extend to a decaheteronuclear cluster structure via bridging cyanide ligands. Complex 2 has a pentaheteronuclear cage structure and the neighboring two Co(III) and three Cd(II) centers are bridged by six cyanide ligands. Complex 3 features an unprecedented 3D heterometallic Co(III)-Zn(II) framework based on cyanide ligands.