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1989shaonan金蟲 (小有名氣)
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[求助]
求助:PCM “tessalation”怎么描述?
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采用pcm優(yōu)化構(gòu)型,審稿人提問讓給出pcm的“tessalation”。我覺得可能指的是“tesselation”。 gaussian03軟件只給出了tsare=area 的默認值0.2,但沒有給出tsnum的默認值,網(wǎng)上一些資料提到tsnum默認是60,不知是否如此? 非常感謝幫助! |
Gaussian |
金蟲 (小有名氣)
版主 (著名寫手)
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老版本的高斯的手冊里會提到 默認的TSNUM是60. 高斯手冊的原文 SELECTING THE POLYDEDRON FOR THE SURFACE TESSERAE In standard calculations the surface of each sphere is subdivided in 60 triangular tesserae, by projecting the faces of an inscribed pentakisdodecahedron. Other polyhedra with a different number of faces can be used, to get rougher or finer descriptions of the surface, by using one of these keywords: TSNUM=N Sets the number of tesserae on each sphere (60 is the default for the usual pentakisdodecahedron). The program automatically selects the polyhedron with the closest number of faces to the specified value of N. TSARE=area Specifies the area of the tesserae, in units of Å2 (0.4 is a typical value). The program automatically determines the best polyhedron for each sphere. EXAMPLE PCM INPUT The following Gaussian job performs a PCM energy calculation on the molecule HF using the solvent cyclohexane. The calculation is performed at a temperature of 300 K using a scaling factor for all atoms except acidic hydrogens of 1.21 and a value of 70 tesserae per sphere: # HF/6-31++G(d,p) SCF=Tight SCRF=(PCM,Read,Solvent=Cyclohexane) Test PCM SP calculation on hydrogen fluoride 0,1 H F 1 R R=0.9161 TABS=300.0 ALPHA=1.21 TSNUM=70 manual的鏈接 http://www.uam.es/departamentos/ ... sian98/00000474.htm |
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