ab initio and DFT calculations
Structures and Fragmentations of Small Silicon Oxide Clusters by ab Initio Calculations
... using DFT and MP2 energies are listed in Table 2 and Table 3, ...the DFT calculations are not affected by including the zero-point vibrational ...MP2 calculations are similar to those of ...
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An overview of density functional theory based codes used for ab initio calculations
... in ab initio ...of DFT and the family of quantum mechanical simulation ...(DFT) calculations is rapidly becoming a standard tool for diverse materials modeling problems in physics, ...
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Ab Initio and Density Functional Theory (DFT) Study on Clonazepam
... The calculation of effective atomic charges plays an im- portant role in the application of quantum mechanical calculations to molecular systems. The charge distribu- tion on different atoms (C, N, O and Cl) for ...
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Workshop report Linear Scaling Ab Initio Calculations: Applications and Future Directions
... linear-scaling DFT code ...Although DFT simulations on these systems are highly desirable, they had been impossible as the systems include more than ten thousand ...perform DFT calculations on ...
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Vibrational Spectroscopic Studies and Ab Initio Calculations of 3-Nitroacetanilide
... and DFT calculations of 4-hydroxyacetanilide. Computational method is at present widely used for simulating IR spectrum. Such simulations are indispensable tools to perform normal coordinate analysis so ...
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High level ab initio, DFT, and RRKM calculations for the unimolecular decomposition reaction of ethylamine
... calculations and mass spectrometric techniques. They proposed three alkene elimination reaction channels. Several studies have discussed the structure of vinylamine by microwave rotational spectra [12] and ...
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Modeling Of Tow Wrinkling In Automated Fiber Placement Based On Geometrical Considerations
... (DFT) calculations have been applied to doped materials since 1978 [53]–[69], and the number of such studies is ...principle calculations have been reviewed by Hautier et ...(Vienna Ab ...
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The different roles of charged and neutral atomic and molecular oxidising species in silicon oxidation from ab initio calculations
... Our calculations use spin-polarised version of den- sity functional theory (DFT) with the Perdew±Wang functional and the generalised gradient approximation (GGA) [15,16] implemented within VASP code ...
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Understanding the thermal properties of amorphous solids using machine learning based interatomic potentials
... principle, ab initio simulations (typically based on Density Functional Theory, DFT [33]) would be the tool of the trade to compute properties such as the electronic contribution to the thermal ...
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Molecular Structure, Vibrational Assignments and Non Linear Optical Properties of 4,4’ Dimethylaminocyanobiphenyl (DMACB) by DFT and ab Initio HF Calculations
... such calculations. On the other hand, DFT was applied using the B3LYP which is the keyword for the hybrid functional [7], which is a li- near combination of the gradient functional proposed by Becke [8] and ...
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Ab Initio Calculations of Optical Properties of TlBr and TlCl Radiation Detectors
... The optical properties of cubic TlBr and TlCl have been investigated using the wien2k package, full-potential linearized augmented plane wave (FP-LAPW) approach within the density functional theory (DFT) in the ...
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Protonation Sites in Benzimidazolyl Chalcones Molecules: An ab Initio and DFT Investigation
... In this work, we have focused our investigations on the protonation sites predilection in the benzi- midazolyl-chalcones (BZC) derivatives. Particularly, we are interested in the study of geometrical and energetical ...
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Hydrogen bonding sites in benzimidazolyl chalcones molecules: An ab initio and DFT investigation
... the calculations of the vibration frequencies have been carried out using the Gaussian 03software [23], in blank, at the HF/6-311+G(d, p)andMPW1PW91/6-311+G(d,p) theories ...
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Electronic Structure, Thermodynamics functions and Physical properties for [(E)-2-cyano-3-(2,4-dichlorophenyl) acrylic acid]derivatives by using Ab Intio calculations(DFT-Model)
... In this research calculated the geometry (bond lengths and bond angels ) of the four molecules of ( E)-2-cyano-3-(2,4- dichlorophenyl)acrylic acid derivatives ( R-Cl , R-O-PH , R- S-PH- Cl , R- N - pyridine) , using the ...
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Computational approaches to understanding reaction outcomes of organic processes in ionic liquids
... tion. Ab initio and semi-empirical calculations are highly accu- rate and reliable, as they are derived directly from quantum- mechanical principles; the energy is calculated from a wave- function ...
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Dipole Moments of the Bioactive Constituents Present in Flutab Drug by Ab Initio Calculations
... moment calculations for Paracetamol, Diphenhydramine and Pseudoephedrine using DFT/B3LYP and HF methods with STO-3G, 3-21G, 6-31G(d) basis sets, indicated that Diphen- hydramine was the most stable compound ...
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Ab initio and DFT Studies of Be(BH4)2
... , calculations of Molecular orbital (MO) are conducted to quantify that quantitative in formations including the interference energy and the exchange mechanism between bridge and terminal hydrogen ...
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Ab Initio Calculations on Structural, Electronic and Optical Properties of ZnO in Wurtzite Phase
... First principle calculations are performed on structural, electronic and optical properties of wurtzite ZnO. To obtain reliable results, a highly accurate Full Potential Linearized Augmented Plane Wave (FP-LAPW) ...
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Ab initio calculations of hadronic and electromagnetic reactions for few-body systems
... useful ab initio technique in the case of few-body nuclear physics (up to a number of particles A ' 10 ...(ab initio techniques like Auxiliary Field Diusion Monte Carlo [34] and Coupled ...
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conformational properties and the anomeric effect study of phosphinanes
... Due to the biological interest associated with the six membered cyclic phosphates, phosphorinane and phosphinanes systems have become an important structural moiety [9,11]. One aspect of 2- phosphinanes chemistry is ...
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