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單鹵化苯半經驗分子軌域之理論研究

The Semiempirical MO Study of Monohalogenobenzenes

摘要


同時採用吾等近年來完成之新型INDO 分子軌域法、ab initio法及較佳半經驗分子規域法之一之PM3分子軌域法對單鹵化笨進行計算,求得各種不同方式計算所得之分子第一至第十二階游離能以及分子軌域組態,並與文獻上獲得之各分子實驗值進行比較,證實本新型INDO 分子軌域法的可靠性,同時提出C_6H_5Br 及C_6H_5I最新之游離能計算值並指定其電子組態,尤其對C_6H_5F電子組態舉出最新之見解。

並列摘要


Simultaneously applying our newly modified INDO scheme, ab initio method and one of the best semiempiricaI MO methods PM3 to calculate the molecular orbitals of Monohalogenobenzenes. Comparing the calculated first to twelveth ionization potentials and MO characters with the observed values, all evidences prove that this new INDO model is quite reliable. The new calculated ionization values and the assignments of electron configurations of C_6H_5Br and C_6H_5l are given in the same time. Especially there is a new idea about the assignments of electron configurations of C_6H_5F.

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