47 DAFTAR PUSTAKA Albogami, A.S., Karama, U., Mousa, A.A., Khan, M., Al-Mazroa, S.A., Alkhathlan, A.Z. (2012). Simple and Efficient One Step Synthesis of Functionalized Flavanones and Chalcones. Oriental Journal of Chemistry, 28, 619-626. ISSN: 0970-020 X Bhatti, H.A., Uddin, N., Ayub, K., Saima, B., Uroos, M., Iqbal, J., Anjum, S., Light, M.E., Hameed, A., Khan, K.M. (2015). Synthesis Characterization of Flavone, Isoflavone, and 2,3-Dihydrobenzeofuran-3-Carboxylate and Density Functional Studies. European Journal of Chemistry 6, 3, 305-313. DOI: 10.5155/eurjchem.6.3.305-313.1268 Cagardova, D., Michalik, M, Klein, E., Lukes, V., Marcovic, A. (2019). DFT And Ab Initio Calculations Of Ionization Potentials, Proton Affinities And Bond Dissociation Enthalpies Of Aromatic Compounds. Acta Chimica Slovaca, 12, 225-240. DOI: 10.2478/acs-2019-0032 Cheong, P.H., Legault, C.Y., Um, J.M., Celebi-Olcum, N., Houk, K.N. (2011). Quantum Mechanical Investigations of Organocatalysis: Mechanisms, Reactivities, and Selectivities. Chemical Review, 111, 5042-5137. DOI: 10.1021/cr100212h. Cramer, J.C. (2004). Essentials of Computational Chemistry, Theories and Models Second Edition. John Wiley & Sons, Ltd Cuyckens, F., Claeys, M. (2004). Mass Spectrometry in The Structural Analysis of Flavonoids. Journal of Mass Spectroscopy, 39, 1-15. DOI: 10.1002/jms.585. Dittmer, C., Raabe, G., Hintermann, L. (2007). Asymmetric Cyclization of 2’- Hydroxychalcones to Flavanones: Catalysis by Chiral Bronsted Acids and Bases. European Journal of Organic Chemistry, 5886-5898. DOI: 10.1002/ejoc.200700682 Gasque, L., Álvarez-Idaboy, J.R., Flores-Álamo, M., Guzmán-Méndez, Ó., Campos-Cerón, J.M. (2018). Theoretical and Experimental Study Demonstrates Kinetic Control in Chalconeflavanone Transformation of Naphthalene Derivatives. Journal of Molecular Structure. DOI: 10.1016/j.molstruc.2017.12.078. Hariharan, P.C., Pople, J.A. (1973). The Influence of Polarization Functions on Molecular Orbital Hydrogenation Energies. Theoretical Chimica Acta, 28, 213-222 Hohenstein, E.G., Chill, S.T., Sherrill, C.D. (2008). Assessment of the Performance of the M05-2X and M06-2X Exchange-Correlation Functionals for 48 Noncovalent Interactions in Biomolecules. Journal of Chemical Theory and Computation. (2008). 4, 1996-2000. DOI: 10.1021/ct800308k Jez, J.M., Noel, J.P. (2002). Reaction Mechanism of Chalcone Isomerase. The Journal of Biological Chemistry, 277, 1361-1369. DOI: 10.1074/jbc.M109224200 Kulkarni, P., Wagh, P., Zubaidha., P. (2012). An Improved and Eco-Friendly Method for the Synthesis of Flavanone by the Cyclization of 2’-Hydroxy Chalcone using Methane Sulphonic Acid as Catalyst. Chemistry Journal, 2, 106-110. ISSN: 2049-954X. Lewars, E. G. (2011). Computational Chemistry : Introduction to the Theory and Applications of Molecular and Quantum Mechanics 2nd Edition. Springer Science+Business Media Mennucci, B., Tomasi, J., Cammi, R., Cheeseman, J.R., Frisch, M.J., Devlin, F.J., Gabriel, S., Stephens, P.J. (2002). Polarizable Continuum Model (PCM) Calculations of Solvent Effects on Optical Rotations of Chiral Molecules. Journal of Physical Chemistry A, 106, 25, 6102-6113. DOI: 10.1021/jp020124t. Mondal, R., Gupta, A.D., Malik, A.K. (2011). Synthesis of Flavanones by Use of Anhydrous Potassium Carbonate as An Inexpensive, Safe, and Efficient Basic Catalyst. Tetrahedron Letters, 52, 5020-5024. DOI: 10.1016/j.tetlet.2011.07.072. Nielsen, A.B., Holder, A.J. (2009). Gauss View 5.0, User’s Reference. GAUSSIAN Inc., Pittsburgh. Singh, I., El-Emam, A.A., Pathak, S.K., Srivastava, R., Shukla, V.K., Prasad, O., Sinha, L. (2019). Experimental and theoretical DFT (B3LYP, X3LYP, CAM-B3LYP and M06-2X) study on electronic structure, spectral features, hydrogen bonding and solvent effects of 4-methylthiadiazole-5- carboxylic acid. Molecular Simulation. 45 (13), 1029-1043. DOI: 10.1080/08927022.2019.1629434 Shiroudi, A., Safei, Z., Kazeminejad, Z., Repo, E., Pourshamsian, K. (2019). DFT Study on Tautomerism and Natural Bond Orbital Analysis of 4-Substituted 1,2,4-Triazole and Its Derivatives: Solvation and Substituent Effects. Journal of Molecular Modelling, 26:57. DOI:10.1007/s00894-020-4316-9. Taylor, L.P., Grotewold, E. (2005). Flavonoids as Developmental Regulators. Current Opinion in Biology, 8, 317-323. DOI: 10.1016/j.pbi.2005.03.005. Walker, M., Harvey, A.J.A., Sen, A., Dessent, C.E.H. (2013). Performance of M06, M06-2X, and M06-HF Density Functionals for Conformationally Flexible Anionic Clusters: M06 Functionals Perform Better than B3LYP for a Model System with Dispersion and Ionic Hydrogen-Bonding Interactions. The 49 Journal of Physical Chemistry A. 117, 12590-12600. DOI: 10.1021/jp408166m Wong, M.W., Gill, P.M.W., Nobes, R.H., Radom, L. (1988). 6-311G(MC) (d,p): A Second Row Analogue of the 6-31IG(d,p) Basis Set. Calculated Heats of Formation for Second-Row Hydrides. Journal of Physical Chemistry, 92, 4875-4880. Zang, Y., Wang, Y. (2014). Enantioselective Biomimetic Cyclization of 2’- Hydroxychalcones to Flavanones. Tetrahedron Letters, 55, 3255-3258. DOI: 10.1016/j.tetlet.2014.04.032.