The crystal structure of the amine tautomer of the new Schiff base derived from 5-methyl-2-phenyl-4-benzoyl pyrazolin-3-one with 2-amino phenol was obtained using single crystal X-ray diffraction (XRD). Weak interactions including intermolecular forces, metal-ion coordination, electrostatic forces, van der Waals interactions, and donor-acceptor interactions are responsible for the organized entities of higher complexity. A novel Schiff base crystal: (Z)-4-(((2-hydroxy phenyl) amino)(phenyl) methylene)-3-methyl-1-phenyl-1H-pyrazol-5(4H)-one was synthesized and grown from alcoholic solution. Single crystal X-ray diffraction (XRD) shows that the compound crystallizes in the triclinic crystal system with space group p-1 with a = 7.1822(3) angstrom, b = 11.0015(4) angstrom, c = 13.6353(5) angstrom; alpha = 111.715(10)degrees, beta = 92.255 (2)degrees, gamma = 106.002 (2)degrees, and Z = 2. FTIR, UV/Vis, H-1 NMR, and CHN have been employed to characterize the crystal. Thermal stability and the weak interactions among the neutral entities have also been investigated.