The Fe (III) complex with 4-tert-butylphenoxyacetylhydrazone of pyridine-2- carbaldehyde has been synthesized with aim of searching for new materials with perspective electromagnetic properties. The choice ligand has been caused by presence of several bonding centers of various nature in it. This is the necessary condition for effective and selective transition metals (3d-) ions bonding. This substance can be used as the structural block with threedentant N, N, O coordination unit in a calix[4]arens and complexes synthesis. It was the second reason of our interest to this compound. The ligand (L) 4-tertbutylphenoxyacetylhydrazone has been obtained by interaction 4-tert-butylphenoxyacetylhydrazide with pyridine-2-carbaldehyde. The contain and structure of the received compound have been fixed by data of the element analysis, IR, and 1H NMR spectroscopy. The magnetic properties of material have been investigated by EPR spectroscopy. The symmetric line has been observed in EPR spectra of a coordination complex powder at temperature from 10 until 300 K. The line parameters are g≈2 and width ∆H=800 Oe. It is the evidence of strong exchange interaction between substance molecules. This compound demonstrated high spin (S=5/2) state with parameter of thin structure D>>0.3 in methanol frozen solutions. The EPR line integrated intensity of Fe(III) complex dependend from temperature in accordance with Curie-Weiss law. This work was carried out with the financial support of RFBR (grant no. 07-03- 00325a).figure