I want to know about the criteria used to identify basis sets for geometry optimization and frequency calcualtion in Gaussian09. Please help me.
I want to simulate UV-Visible spectrum of an organic compound using TDDFT in Chloroform. I have used #p CAM-B3LYP/6-31+G(d,p) TD(nstates=40) scrf=(pcm, solvent=12,read) But with the above command...
04 May 2019 2,463 1 View
Dear Friends, I need to calculate electronic scattering cross section for one organic molecules. I am a new one in this field and please help me. Regards Dr. Renjith Raveendran Pillai
01 February 2018 7,156 2 View
Dear Friends. I want to optimize an orgainc structure containing around 56 atoms, including C, H, N and O. Using B3LYP/6-311G++, I have optimised the structure on last Monday. But after the final...
07 August 2017 7,371 9 View
Dear Friends, I am planning to do some TDDFT studies of some biologically active organic derivatives. But due to lack of computational lab facility I could not run gaussian in a large scale. So...
07 August 2016 922 3 View
Dear friends, I want to know why electrical susceptibility is a second order tensor instead of third order or higher? Please help me to find an answer.
05 June 2016 2,642 3 View
Dear Friends, I have optimzed a chalcone derivative using DFT/B3LYP method using different basis sets. The structural parameters of the optimized geometry show large deviation from the XRD values....
05 June 2016 8,431 3 View
Dear Friends, I have tried to do some docking using Autodock4. My molecule contains ligand_types A C F NA Cl OA N . I can run autogrid. But it does not generated F.map. So when I run Autodock, it...
04 May 2016 8,518 2 View
Dear Friends, I have to find out the value of multiplicity for a protonated molecule. To study the effect of protonation in the geometrical parameters, I have optimized my molecule in the ground...
04 May 2016 5,544 4 View
Hi, Anyone please help me to solve this problem. when i open output file in Gaussview, before opening it is showing me a warning window with this text "CConnectionGLOG::Orient_Dipole_Derivative0...
03 April 2016 1,793 1 View
I was trying to optimize a molecule using DFT/b3lyp in Gaussian. But after the optimization, it was found that some bonds are missing from the molecule in the optimized structure. And also in...
03 April 2016 6,509 5 View
Hey there, As a synthetic chemist delving into theoretical calculations for my imidazolium-based organic molecules, I would greatly appreciate any guidance on the appropriate input instructions...
09 August 2024 5,444 7 View
Let's say we have a standard, regular hexagonal honeycomb with a 3-arm primitive unit cell (something like the figure attached; the figure is only representative and not drawn to scale). The...
07 August 2024 1,937 1 View
Hi, I'm currently working on a project where I need to plot the atom-projected band structure using GPAW. I've been able to calculate the band structure for my material, but I'm having trouble...
07 August 2024 269 3 View
My name is Apurva Saoji. I am a Ph.D scholar in Computer engineering in India. I am looking for international expert in reviewing my PhD thesis, "Competitive Optimization Techniques to Minimize...
07 August 2024 4,600 2 View
I've seen articles that primarily focus on alpha and beta activity in the frontal regions, but these studies often compare healthy subjects with those having various pathologies. I haven't seen a...
31 July 2024 7,259 1 View
Hello. I have the geometry of a blade in CAD file (stp) and I want to prepare the blade for meshing with turboGrid. I must import this file into designModeler and then transfer to the...
27 July 2024 356 3 View
Dear Siesta Users, I installed Siesta 5.0.1 and I want to use Grimme's D3 correction. According to the 5.0.1 manual, I could use a few parameters to include the D3 correction in the...
27 July 2024 5,748 0 View
Hello! I am trying to calculate the sumatriptan molecule, but it has been counting for five days and it does not stop. It seems to me that it is too long and I am doing something wrong. Please...
25 July 2024 3,364 5 View
Hi everyone, I am working on a curved domain in which a ship is situated in the middle (geometry is given below). In my understanding the general fluid flow is parallel to the x axis from inlet to...
25 July 2024 9,058 4 View
I have designed magnetic material with different biasing conditions in HFSS. Now I want to give an RF AC signal and do a transient simulation in HFSS. Is it possible to do in HFSS? Please help me...
24 July 2024 9,319 5 View