HF/6-31G[fec8] ab initio分子軌域法 三環[3,3,1,1□]葵烷 幾何優選結構 游離能 LUMO能量 能隙 生成焓 原子化熱 振動頻率 6-31G[fec8] ab initio molecule orbital method Tricyclo[3,3,1,1□]decane (CH[feaf])[feb8]N[feb2] (CH[feaf])[feb8]P[feb2] (CH[feaf])[feb8]B[feb2] (CH[feaf])[feb8]Al[feb2] Ionization potentials HOMO LUMO Energy gaps Heat of formations Atomization energies Vibration frequencies