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用ＩＮＤＯ法对Ｃ_（２８）Ｘ_４（Ｘ＝Ｈ，Ｃｌ）和ＣＸ_４（Ｘ＝Ｈ，Ｃｌ）进行几何构型优化，得到Ｔｄ对称性的构型Ｃ_（２８）Ｘ_４有４种键、４种不等同原子，基态为稳定的闭壳层分子，以此构型为基础计算了上述分子的电子光谱，并预测Ｃ_（２８）Ｘ_４的电子光谱．
The geometric configurations of C_ (28) X_4 (X = H, Cl) and CX_4 (X = H, Cl) were optimized by INDO method. The electron spectra of these molecules were calculated based on this configuration, and the electronic spectra of C_ (28) X_4 were predicted.