Comparative Analysis of X-ray Crystallographic Behaviours of Some Schiff Base Compounds

X-ray Crystallographic Behaviours have been compared for the three Schiff Bases Compounds, (Z)-1-(3-Chlorophenyl)-4-[1-{(2-hydroxyphenyl) amino}propylidene]-3-methyl-1H-pyrazol-5(4H)-one (I), (Z)-1-(3,4-Dichlorophenyl)-3- methyl-4-((naphthalene-1-ylamino)(p-tolyl)methylidene)-1H-pyrazol-5(4H)-one (II) and (Z)-1-(3,4,Dichlorophenyl)-4-(hydroxyl(p-tolyl)methylidene)-3-methyl-1H-pyrazol-5(4H)-one (III) respectively. The compounds (I), (II), (III) are crystallizes in the orthorhombic, monoclinic and Triclinic crystal system with space group Pca2(1), P2(1)/n and P-1. All the rings in the compounds (I), (II), (III) are highly planar in nature. In the crystal structure of (I), (II) and (III), the molecules are linked by an elaborate system of N-H center dot center dot center dot O, C-H center dot center dot center dot O and O-H center dot center dot center dot O hydrogen bonds to generate a chain like construct. Apart from this, compounds (I) and (III), shows p-p interactions helps in stabilization of the crystal structure. The crystal structures of all the three molecules were solved by direct method using single crystal X-ray diffraction data collected at room temperature and refined by full-matrix least-squares procedures. The X-ray crystallographic properties of these synthesized compounds are compared herein.