Wydział Chemii

Karol Wydra

Katarzyna Ślepokura

Janusz Gregoliński

Jerzy Lisowski

2025

Polyhedron

273

117472/1-117472/12

10.1016/j.poly.2025.117472

Naukowa

Angielski

Artykuł

Five homonuclear cobalt(II) and zinc(II) complexes and two mixed-valence Co(II)/Co(III) coordination species derived from the enantiomers of the macrocycle H₃L were synthesized, characterized by spectroscopic methods and their X-ray crystal structures were determined. The large macrocyclic amine L³⁻ composed of three phenol moieties and three trans-1,2-diaminocyclohexane units can accommodate three Co(II), Co(III) or Zn(II) ions in three N₂O₂ compartments, forming [M₃L]ⁿ⁺ type complexes. The geometry of these complexes is different for the Zn(II) and Co(II) ions and depends on the counteranion used. Additionally, this macrocycle binds only two metal ions in its partly deprotonated (H₂L)⁻ form to give complexes of the type [M₂(H₂L)]ⁿ⁺. Amine H₂L⁻ also forms a tetranuclear [M₄(H₂L)₂]ⁿ⁺ complex, where two macrocyclic units are additionally connected by bridging anions. XRD structures of seven additional coordination species that were isolated as single crystals are also presented.

Macrocyclic complexes, Polynuclear complexes, Co(II), Zn(II), Chiral ligands, Coordination chemistry, Magnetic properties

http://dx.doi.org/10.1016/j.poly.2025.117472

http://www.elsevier.com