Cobalt perovskite oxides and their derivatives are intensively studied because of their complex electronic and magnetic properties, that are very attractive for many technological applications. Physical properties of such systems depend strongly on the oxygen deficiency and can be modified by choosing appropriate preparation conditions [1]. Herein, we present the synthesis of strontium cobaltite nanopowder from coordination molecular precursor Co-Sr-2,3-PDC (1) [2] by a thermal decomposition method as well as structural, magnetic and transport characterization of the composite obtained. Compound 1 exhibits a 2D coordination polymer structure, where the ligands link Co(II) and Sr(II) ions in the molar ratio 1:1; the shortest cobalt-cobalt distance is 6.42 Å. The TGA thermal analysis proves that complex 1 undergoes a controlled thermal decomposition to give a Co-Sr mixed metal oxide residue 2, which after cooling in air was determined by PXRD as Sr6Co5O15⋅Co3O4 (CPDC Nr 01-086-0614, and Nr 00-042-1467). The chemical composition and surface morphology analyzed by SEM microscopy and ED X-ray, suggest the formation of crystallite mixture of Sr6Co5O15⋅Co3O4 with well-defined crystalline particles evently distributed in the range 1-3 μm. Variable temperature magnetic measurements of 1 and 2 have been performed in the range 5 – 330 K. The magnetic studies of polycrystalline sample 1 show the dominant paramagnetic behavior of high-spin (S = 3/2) Co(II) ions (fig.1). While for sample 2, magnetometry results demonstrate the presence of a major compound Sr6Co5O15 (fig.2) with a small inclusions of SrCoO2.75, probably, remaining as an insignificant part of the intermediate phase. The electrical conductivity (σ) (75–330 K) of 2, shows semiconducting-like behavior with values of σ in the range ~10-6–10-1 Ω-1cm-1 with Ea~ 0.23 eV in the range (T=200-330K).