Dear all<br><br>I just ploted the 3D charge density using pp.x code. And XCRYSDEN was used for displaying the 3D isosurface of charge density. When I set the isovalue for different number, such as 0.15 or less, I fould the overlap of electron cloud is quite meanful for different systems of distinct catalysis activities. I wonder what the unit of charge density? and whether the absolute value of it could be directly c<font style="font-size: 14px;">omparable </font>for different systems ( same number of atoms, same element, only different in geometry of the model)? if I adjust the same isovalue (~0.15) for two systems, I found the the electron cloud is overlapped at reacive site for more reactive system and the electron cloud is separated for less reactive system. Could I say the chemical bond is stronger in reactive system and that bond is responsible for the activities?<br>
<br>By the way, is there a tutorial for population analysis? I wonder where I could find the value of overap population for a pair of atoms. <br><br>thank you for reading, any hints will be deeply appreciated.<br><br>vega <br clear="all">
<br>-- <br>==================================================================================<br>Vega Lew ( weijia liu)<br>PH.D Candidate in Chemical Engineering<br>State Key Laboratory of Materials-oriented Chemical Engineering<br>
College of Chemistry and Chemical Engineering<br>Nanjing University of Technology, 210009, Nanjing, Jiangsu, China<br>******************************************************************************************************************<br>
Email: <a href="mailto:vegalew@gmail.com">vegalew@gmail.com</a><br>Office: Room A705, Technical Innovation Building, Xinmofan Road 5#, Nanjing, Jiangsu, China <br>****************************************************************************************************************** <br>