%0 Journal Article %T X-Ray and Theoretical Studies of 4-((4-(tert-butyl)benzylidene)amino)-1,5-dimethyl-2- phenyl-1,2-dihydro-3H-pyrazol-3-one %A £¿ehriman ATALAY %J - %D 2018 %X The molecular structure of [4-((4-(tert-butyl)benzylidene)amino)-1,5-dimethyl-2-phenyl1,2-dihydro-3H-pyrazol-3-one crystal and some physical and chemical properties were investigated using single crystal X-ray diffraction, FT-IR, UV and quantum mechanical methods. The compound studied in this study is the Schiff base compound and crystalizes in monoclinic space group I2/a. The molecule is not planar. The crystal structure is stabilized by intermolecular C-H¡­..¦Ğ interactions. Theoretically, it was investigated using Density Functional Theory (DFT) and Hartree-Fock Roothann Method compared with the experimental results and it was seen that both results were in agreement with each other. In the DFT and HF calculations, the B3LYP / 6-31G +d base set and Berny's method were use %K Schiff baz£¿ bile£¿ikleri %K YFK ve HF hesaplamalar£¿ %K X-£¿£¿£¿n£¿ Difraksiyonlar£¿ %K FT-IR ve UV-vis spektrumlar£¿ %U http://dergipark.org.tr/sdufeffd/issue/40584/466722