Citation: ng Xue-Dong, Xiao He-Ming. Calculations of the Structure,Vibrational Spectrum and Thermodynamic Properties of Succinimide[J]. Acta Physico-Chimica Sinica, ;1999, 15(08): 688-692. doi: 10.3866/PKU.WHXB19990805
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Density functional theory(DFT) and ab initio molecular orbital method have been employed to optimize the molecular geometry of succinimide at the B3LYP/6-31G*, B3LYP/ 6-311G** and MP2/6-311G** levels, respectively. Harmonic vibrational analyses have been performed at the B3LYP/6-31G* and B3LYP/6-311G** levels. The standard thermodynamic properties at various temperatures have been evaluated using the scaled B3LYP/6-31G* and B3LYP/6-311G** frequencies. The calculated results are compared with each others and with available experimental data, and are discussed in detail.
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