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Zinc(II) and nickel(II) complexes of 3,5‐dimethyl‐1‐(pyridin‐2‐yl)‐1 H ‐pyrazole: relationship between fluorescence and crystal packing
Author(s) -
Małecka Magdalena,
Kusz Joachim,
Mayer Peter,
Sobiesiak Marta,
Budzisz Elzbieta
Publication year - 2021
Publication title -
acta crystallographica section c
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.304
H-Index - 17
ISSN - 2053-2296
DOI - 10.1107/s2053229621005374
Subject(s) - pyrazole , chemistry , nickel , zinc , crystal structure , dimer , ligand (biochemistry) , crystallography , fluorescence , octahedron , monomer , crystal (programming language) , stereochemistry , polymer , organic chemistry , biochemistry , physics , receptor , quantum mechanics , computer science , programming language
Two novel coordination complexes, namely, dichlorido[3,5‐dimethyl‐1‐(pyridin‐2‐yl‐κ N )‐1 H ‐pyrazole‐κ N 2 ]zinc(II), [ZnCl 2 (C 10 H 11 N 3 )], 1 , and aquachloridobis[3,5‐dimethyl‐1‐(pyridin‐2‐yl‐κ N )‐1 H ‐pyrazole‐κ N 2 ]nickel(II) chloride monohydrate, [NiCl(C 10 H 11 N 3 )(H 2 O)]Cl·H 2 O, 2 , have been synthesized. The crystal structure analyses revealed that complexes 1 and 2 are mononuclear and have ZnN 2 Cl 2 distorted tetrahedral and NiN 4 OCl 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)‐1 H ‐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 .