Zinc(II) and nickel(II) complexes of 3,5-dimethyl-1-(pyridin-2-yl)-1H-pyrazole: relationship between fluorescence and crystal packing

Malecka, Magdalena; Kusz, Joachim; Mayer, Peter; Sobiesiak, Marta und Budzisz, Elzbieta (2021): Zinc(II) and nickel(II) complexes of 3,5-dimethyl-1-(pyridin-2-yl)-1H-pyrazole: relationship between fluorescence and crystal packing. In: Acta Crystallographica Section C-Structural Chemistry, Bd. 77: S. 321-330

Abstract

Two novel coordination complexes, namely, dichlorido[3,5-dimethyl-1-(pyridin-2-yl-kappa N)-1H-pyrazole-kappa N-2]zinc(II), [ZnCl2(C10H11N3)], 1, and aquachloridobis[3,5-dimethyl-1-(pyridin-2-yl-kappa N)-1H-pyrazole-kappa N-2]nickel(II) chloride monohydrate, [NiCl(C10H11N3)(H2O)]Cl center dot H2O, 2, have been synthesized. The crystal structure analyses revealed that complexes 1 and 2 are mononuclear and have ZnN2Cl2 distorted tetrahedral and NiN4OCl distorted octahedral structures, respectively. Complex 1 displays a dimer in the crystal structure, while complex 2 forms a chain along the [010] direction. The fluorescence properties of both complexes were also investigated. A search of the Cambridge Structural Database for other complexes of the ligand 3,5-dimethyl-1-(pyridin-2-yl)-1H-pyrazole (L) shows that there exist different coordination polyhedra with different arrangements as monomers, dimers and polycyclic structures. Here it has also been demonstrated that there is a relationship between the crystal packing and the fluorescence properties of Zn-II and Cd-II complexes of L.

• Dokumententyp: Zeitschriftenartikel
• Fakultät: Chemie und Pharmazie > Department Chemie
• Themengebiete: 500 Naturwissenschaften und Mathematik > 540 Chemie
• ISSN: 2053-2296
• Sprache: Englisch