Mechanical prope1ties of metal-organic materials (MOMs) deserve growing attention since they are essential variables for a majority of possible applications. The nanoindentation allows estimating the stability liinits of MOMs, anisotropy of hardness on different planes, and contribution of different types of interatomic and inte1molecular interactions to the overall crystal stability. Laminar title compound 1 crystallizes in the monoclinic space group P21/c [1]. The Co(II) cation coordinates three AcO- anions, one water and two bpe molecules. The N2O4-coordination sunounding of Co(II) atom represents the disto1ied octahedron that comprises four oxygen atoms in the equatorial plane [Co(l)-O: 2.071(2)-2.107(2) A], and two nitrogen atoms in axial positions [Co(l)-N: 2.163(3) and 2.175(3) A]. The extension of stmctural motif occurs via bridging AcO­anions and bpe ligands and affords the 2D ( 4,4) coordination network. The Co···Co separation across AcO- is 5.145 A, and across bpe is 13.617 A. The layer is mnning parallel to the (010) plane (Figure, left). The disordered dmf solvent molecules accumulated in the interlayered space are held there by the 1t-1t interactions with the bpe aromatic systems. To estimate the mechanical anisotropy of the layered material 1, the three planes (001), (100) and (010) were indented for which the indexing of the planes was perfo1med by X-ray method. Representative P-h curves obtained on three planes are shown in Figure, right. An essential anisotropy is obse1ved if the mechanical parameter values are compared for all  investigated planes. The (001) plane is the hardest one, with the maximal values of E and H: 13.07 GPa and 0.73 GPa, respectively. The (010) plane is the least hard one: E = 4.92 GPa, H= 0.24 GPa.  Thereby, the maximal anisotropy coefficient for Young modulus amounts to kE= E(oo1/Er010; = 2.66,  and for hardness: kH= H(oo1/H(oJoJ = 3.04. The mechanical parameters for the (100) plane is closed to the same for the (001): E = 12.54 GPa, H =0.61 GPa, i.e. kE = E(oo1/E(loo; =I.04, and kH  = H(oo1/H(loo;= l .2. Our results present convincing evidence that the crystal orientation dominated by the metal-organic layers with the van der Waals and 7t-7t stacking interactions between the layers is  the least robust from the mechanical propetiies standpoint.