Aryl- and aroylhydrazones have a wide range of reactive atoms and form with transition metal ions coordination compounds with various composition, structure, and properties. Many of these coordination compounds are biologically active substances, so they can be used as base materials for creating selective microbiologic nutritional media, disinfectants, and antiseptics. Therefore, synthesis and study of new composition compounds of biometals with these ligands are of both scientific and practical interest. The aim of this work is the synthesis, determination of the composition, structure, and physicochemical properties of cobalt, nickel, copper, and zinc coordination compounds with 2formyl- (HL1), 2-acetyl- (HL2), and 2benzoylpyridine (HL3) benzoylhydrazones. The experiments showed that hot ethanolic solutions (55-600C) of chlorides and nitrates of stated above metals react with synthesized benzoylhydrazones HL1-3 in 1:1 or 1:2 molar ratio forming fine-crystalline coloured coordination compounds. The composition of these compounds was determined using elemental analysis: M(HL1-3)Х2 (M = Cu, Zn, X = Cl-, NO3 -) and M(HL1-3)2Cl2 (M = Co, Ni). Cobalt and nickel acetates under the same conditions form coordination compounds with the following composition: M(L1-3)2 (M = Co, Ni). The magnetochemical research showed that the synthesized coordination compounds of copper are monomeric because their effective magnetic moments at room temperature correspond to spin value for one unpaired electron. The synthesized coordination compounds of cobalt and nickel are paramagnetic. Their effective magnetic moment values indicate that ligands form an octahedron around the metal ions that are in the oxidation state +2. IR spectroscopic study of the synthesized compounds showed that hydrazones HL1-3 behave as tridentate ligands. These ligands coordinate to the central ions with azomethinic and pyridinic nitrogen atoms and carbamide oxygen atom forming two five-membered metallacycles. This way of coordination is proved by the displacement of the absorption band ν (C=N) in the low frequency region by 30-25 cm-1 compared with a similar absorption band of hydrazones HL1-3 and appearance of two new bands in the area 540-405 cm-1 resulting from the absorption of the metal-nitrogen bonds (540-520 and 435-405 cm-1). Participation of the amide oxygen atom of the ligands HL1-3 in coordination to the central ions is proved by the displacement of the absorption band ν (C=O) in the low frequency region by 20-15 cm-1 and appearance of a new band in the area 480-465 cm-1 resulting from the absorption of the metal-oxygen bond. It should be mentioned that in the coordination compounds ML2 (M = Co, Ni) amide oxygen atom of the hydrazones HL1-3 is in deprotonated enolic form.