I. Structures and interaction energies of the van der Waals systems, C2H2-(H2O)x, x=1-4 and CHy-H2O, y=1,2 and II. Electronic structure of the carbides BC, BC-, HBC, AIC, AIC- and HAIC by ab initio calculations
Abstract
The dissertation is divided in two parts. In the first one some very interesting and important van der Waals molecules are studied. The interaction of the acetylene molecule with water clusters (one up to four water molecules) is studied and 5, 6, 13 and 33 structures are calculated for the systems C2H2-H2O, C2H2(H2O)2, C2H2(H2O)3 and C2H2(H2O)4 respectively. Absolute energies, dissociation energies, fully optimized geometries and harmonic frequencies are given. The study of these clusters is important because acetylene is one of the few hydrocarbons that are soluble, even though slightly, in water. Through this study, the solubility of acetylene in water is explained. Moreover, the interaction of the methylidene CH and methylene CH2 with the water is investigated and all possible structures are calculated (7 and 10 structures respectively). Absolute energies, dissociation energies, geometries and harmonic frequencies are given. The study is important because CH is one of the most reac ...
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