A restricted-open-shell complete-basis-set model chemistry

2006 ◽  
Vol 125 (9) ◽  
pp. 094106 ◽  
Author(s):  
Geoffrey P. F. Wood ◽  
Leo Radom ◽  
George A. Petersson ◽  
Ericka C. Barnes ◽  
Michael J. Frisch ◽  
...  
Keyword(s):  
Open Shell ◽  
Basis Set ◽  
Complete Basis ◽  
Complete Basis Set

scholarly journals Dataset of Noncovalent Intermolecular Interaction Energy Curves for 24 Small High-Spin Open-Shell Dimers

2021 ◽  
Author(s):  
Katarzyna Madajczyk ◽  
Piotr Zuchowski ◽  
Filip Brzęk ◽  
Łukasz Rajchel ◽  
Dariusz Kędziera ◽  
...  
Keyword(s):  
Interaction Energy ◽  
Intermolecular Interaction ◽  
High Spin ◽  
Open Shell ◽  
Basis Set ◽  
Interaction Energies ◽  
Intermolecular Interaction Energy ◽  
Complete Basis ◽  
Complete Basis Set ◽  
Basis Set Extrapolation

<div>We introduce a dataset of 24 interaction energy curves of open-shell noncovalent dimers, referred to as the O24x5 dataset. The dataset consists of high-spin dimers up to eleven atoms selected to assure diversity with respect to interactions types: dispersion, electrostatics and induction. The benchmark interaction energies are obtained at the restricted open-shell CCSD(T) level of theory with complete basis set extrapolation aug-cc-pVQZ--> aug-cc-pV5Z.</div>

scholarly journals Dataset of Noncovalent Intermolecular Interaction Energy Curves for 24 Small High-Spin Open-Shell Dimers

2021 ◽  
Author(s):  
Katarzyna Madajczyk ◽  
Piotr Zuchowski ◽  
Filip Brzęk ◽  
Łukasz Rajchel ◽  
Dariusz Kędziera ◽  
...  
Keyword(s):  
Interaction Energy ◽  
Intermolecular Interaction ◽  
High Spin ◽  
Open Shell ◽  
Basis Set ◽  
Interaction Energies ◽  
Intermolecular Interaction Energy ◽  
Complete Basis ◽  
Complete Basis Set ◽  
Basis Set Extrapolation

<div>We introduce a dataset of 24 interaction energy curves of open-shell noncovalent dimers, referred to as the O24x5 dataset. The dataset consists of high-spin dimers up to eleven atoms selected to assure diversity with respect to interactions types: dispersion, electrostatics and induction. The benchmark interaction energies are obtained at the restricted open-shell CCSD(T) level of theory with complete basis set extrapolation aug-cc-pVQZ--> aug-cc-pV5Z.</div>

scholarly journals Density Functional Theory and Complete Basis Set Ab Initio Computational Study of Five-, Six-, Seven- and Eight-hydrogen Coordinated Carbon Cations

1999 ◽  
Vol 23 (8) ◽  
pp. 502-503
Author(s):  
Branko S. Jursic
Keyword(s):  
Density Functional Theory ◽  
Ab Initio ◽  
Density Functional ◽  
Computational Study ◽  
Basis Set ◽  
Functional Theory ◽  
Complete Basis ◽  
Complete Basis Set ◽  
High Level

High level ab initio and density functional theory studies are performed on highly protonated methane species.

Evaluation of integrals appearing in the hylleraasCI method by expanding 1/rij in terms of a complete basis set

1994 ◽  
Vol 52 (S28) ◽  
pp. 39-48 ◽  
Author(s):  
J. E. P�rez ◽  
H. H. Cuenya ◽  
F. S. Ortiz ◽  
R. H. Contreras ◽  
H. Grinberg ◽  
...  
Keyword(s):  
Basis Set ◽  
Complete Basis ◽  
Complete Basis Set

From CCSD(T)/aug-cc-pVTZ-J to CCSD(T) complete basis set limit isotropic nuclear magnetic shieldings via affordable DFT/CBS calculations

2011 ◽  
Vol 49 (5) ◽  
pp. 231-236 ◽  
Author(s):  
Teobald Kupka ◽  
Michał Stachów ◽  
Marzena Nieradka ◽  
Jakub Kaminsky ◽  
Tadeusz Pluta ◽  
...  
Keyword(s):  
Basis Set ◽  
Complete Basis ◽  
Complete Basis Set ◽  
Complete Basis Set Limit ◽  
Nuclear Magnetic

scholarly journals Quantum Calculations to Estimate the Heat of Hydrogenation Theoretically

2020 ◽  
Author(s):  
Ali Amir Khairbek
Keyword(s):  
Unsaturated Hydrocarbon ◽  
Experimental Results ◽  
Basis Set ◽  
Good Linear ◽  
Complete Basis ◽  
Complete Basis Set ◽  
Complete Basis Set Limit ◽  
The Mean ◽  
Experimental Values ◽  
Linear Correlations

Standard enthalpies of hydrogenation of 29 unsaturated hydrocarbon compounds were calculated in the gas phase by CCSD(T) theory with complete basis set cc-pVXZ, where X = DZ, TZ, as well as by complete basis set limit extrapolation. Geometries of reactants and products were optimized at the M06-2X/6-31g(d) level. This M06-2X geometries were used in the CCSD(T)/cc-pVXZ//M06-2X/6-31g(d) and cc-pV(DT)Z extrapolation calculations. (MAD) the mean absolute deviations of the enthalpies of hydrogenation between the calculated and experimental results that range from 8.8 to 3.4 kJ mol−1 based on the Comparison between the calculation at CCSD(T) and experimental results. The MAD value has improved and decreased to 1.5 kJ mol−1 after using complete basis set limit extrapolation. The deviations of the experimental values are located inside the “chemical accuracy” (±1 kcal mol−1 ≈ ±4.2 kJ mol−1) as some results showed. A very good linear correlations between experimental and calculated enthalpies of hydro-genation have been obtained at CCSD(T)/cc-pVTZ//M06-2X/6-31g(d) level and CCSD(T)/cc-pV(DT)Z extrapolation levels (SD =2.11 and 2.12 kJ mol−1, respectively).

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