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Theoretical Investigations on Thermo-Dynamic Properties and Molecular Structure of the Phosphorus-Containing Derivative of Chromone

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Abstract (2. Language): 
The possible tautomeric forms of 3-(1-amino-ethylidene)-2methoxy-2-oxo-2,3-dihydro-2A5-benzo[e][1,2]oxaphosphinin-4-one molecule were searched by utilizing Hartree-Fock (HF) and Density Functional Theory (DFT) methods. The computed bond lenğths and bond anğles were compared with the experimental data. The structure, enerğies and relative stability of tautomers were compared and analyzed. The amine-keto and imino-enol tautomerism was taken into account to rationalize the difference in reactivity between the two forms. The keto form was found to be more stable than the enol form. The acidity constant and physicochemical parameters were computed by semi-empirical methods.
Abstract (Original Language): 
3-(1-Amino-etilidin)-2metoksi-2-okzo-2,3 -dimdro-2A5-benzo[e][1,2]okzafosfonin-4-on olası tautomerik formları Hartree-Fock (HF) ve Yoğunluk Fonksiyonel teorisi (DFT) metodları kullanılarak arastırıldı. Hesaplanan bağ uzunlukları ve bağ acıları deneysel verilerle kıyaslandı. Tautomerlerin yapıları, enerjileri ve relatif kararlıkları karsılastırıldı ve analiz edildi. Amin-keto ve imin-enol tautomerizmi, iki form arasındaki reaktivite farkını oranlamak itin dikkate alındı. Keto formunun enol formundan daha kararlı olduğu gözlendi. Asitlik sabiti ve fizikokimyasal parametreler yarı-deneysel metodlarla hesaplandı.
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