snljty2 发表于 2022-8-31 14:17 感谢指导! |
本帖最后由 snljty2 于 2022-8-31 14:24 编辑 Amoy 发表于 2022-8-31 10:53 1. 剩余的内存也没别的用,内存给的不够要么算不了要么会用更慢的方法算。建议在正常配置的服务器,[每核]给不少于2GB内存。 2. M06不是最适合你这个体系的泛函。 3. 看卢老师博文在VMware 15中安装CentOS 7.6的完整过程视频演示 和 Gaussian的安装方法及运行时的相关问题。4. 单点的基组弥散没啥用(如果我没记错昨天看的你的结构),本身可以提升到def2-TZVP。几何优化LanL2DZ给La用太小。然后不要用这么老版本的G09了,尽早换G16。 |
snljty2 发表于 2022-8-31 08:52 谢谢指点。 1.将内存调整为1024MB(%mem=1024MB),目前能够正常计算。 2.关于基组的选择,一方面我参考了组内同学的工作,他们在结构优化和振动分析时选择的是相同的混合基组,在计算单点能时选择了更贵的方法计算(M06,SDD 6-311++G(d,p))我也依葫芦画瓢,先照着样子做一遍。 3.我也想安装Linux系统,可是一时半会儿还没弄懂怎么安装,刚在B站上找了一个教程,还在琢磨怎么安装,不知道老师是否有更加详细的教程。 4.下面是我们组同学的计算方法,麻烦您给看一下是否合理? The B3LYP density functional method was employed to carry out all the geometry optimizations. For the geometry optimizations, the LANL2DZ basis set with the LANL2DZ pseudopotential was utilized for La and I atoms. The 6-31G(d) basis set was used for other atoms. Vibrational frequency analyses at the same level of the theory were performed on all the optimized geometries to characterize them as local minima (no imaginary frequency) or transition states (one imaginary frequency). In addition, intrinsic reaction coordinate (IRC) calculations were used to verify that the transition state connect with appropriate reactant and product. The M06 functional was employed to run single-point energy calculations based on the optimized structures with larger basis sets (SDD for La, I atoms and 6-311++G(d,p) for other atoms). The Gibbs energy was determined by adding the single-point energy calculated at larger basis sets and the gas-phase thermal correction to the Gibbs energy obtained from the vibrational frequency analysis. All calculations were carried out with the Gaussian 09 (Revision C.01) suite of programs. 再次感谢。 |
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