In the framework of problem of competitive coordination of ambidentate
chelating azomethine ligands [1, 2] we at first have synthesized and
structurally characterized complexes of 4-{1-phenyl-3-methyl-5-thiopyrazol-4-
ylmethylenimino}benzo-15-crown-5 with 3d-metals (I).

Chelates possess tetrahedral environment of metal-center (NMS angle: Ni
– 74.6, Cu – 67.6, Zn – 77.2°).
In accordance with HSAB principle intermediate transition metals are
coordinated with softened N,S-chelating group, and hard water molecule is
bonded with hard crown-ether fragment.
Authors are grateful to the Program of Russian Academy of Sciences
“Chemistry and Physic-chemistry of Supramolecular Systems and Atomic
Clusters” (No of the State Reg. 10002-251/OKhNM-07/135-119/180603-728)
for the financial support.
1. Garnovskii A.D., Garnovskii D.A., Vasilchenko I.S. et al. // Russ. Chem. Rev.
1997. V. 66. N 5. P. 389.
2. Synthetic Coordination and Organometallic Chemistry. / Eds. A.D. Garnovskii,
B.I. Kharisov. Marcel Dekker: New York – Basel. 2003. 520 p.