The monomeric coordination complex (I) is having formula {[Co(III)-mu(6)-(H-EDTA-kappa(5) N1,N2,O2,O6,O8)center dot H2O]center dot 2H(2)O}, which has been crystallized in distilled water and characterized by elemental analyses, FT-IR spectrum and Powder X-ray diffraction analyses. Single-crystal X-ray diffraction analysis revealed that complex (I) crystallized in triclinic space group P-1 (space group no. 2) having mu(6) coordination modes of complex with EDTA and Co (III) transition metal ion. The coordination number of Co (III) ion is six, occupied distorted octahedral geometry, where three carboxylate oxygen atoms, two nitrogen atoms, and one water molecule O1W are coordinated. There are two lattice water molecules are present in the molecular structure of complex (I) responsible for strong H-bonding interactions.