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[求助]
關(guān)于布局分析
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| 各位大俠,小弟最近在計(jì)算晶體的布局分析時(shí)得到Hirshfeld Charge (e),但是不知道Hirshfeld Charge (e)是什么意思?其中的正負(fù)號(hào)代表什么呢? 麻煩各位,小弟不勝感激 |
木蟲(chóng) (著名寫(xiě)手)
有志成年

專家顧問(wèn) (著名寫(xiě)手)
伊卡斯特的小豬
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專家經(jīng)驗(yàn): +503 |
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help里的解釋 Hirshfeld charges (Hirshfeld, 1977) are defined relative to the deformation density, this is the difference between the molecular and unrelaxed atomic charge densities. For quantitative descriptions of charge distributions in molecules or solids it is convenient to divide a system into well-defined atomic fragments. A general and natural choice is to share the charge density at each point between the atoms, in proportion to their free-atom densities at the corresponding distances from the nuclei. This prescription yields well-localized bonded-atom distributions each of which closely resembles the molecular density in its vicinity. Integration of the atomic deformation densities - bonded minus free atoms - defines the net atomic charges and multipole moments which concisely summarize the molecular charge reorganization. This permits calculation of the external electrostatic potential and the interaction energy between molecules or between parts of the same molecule. |

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