Results 21 to 30 of about 458,655 (311)

Push-pull nitronates in the [3+2] cycloaddition with nitroethylene: Molecular Electron Density Theory study

open access: hybridJournal of Molecular Graphics and Modelling, 2020
The structure and the participation of the N-methoxy-N-[bis(methoxycarbonyl)methylene]amine N-oxide as model push-pull nitronate 1 with nitroethylene 2 in [3 + 2] cycloaddition (32CA) reaction have been analyzed within the Molecular Electron Density Theory (MEDT) using Density Functional Theory (DFT) calculations at the B3LYP(PCM)/6-31G(d) level ...
Agnieszka Kącka‐Zych
openalex   +3 more sources

Tackling Solvent Effects by Coupling Electronic and Molecular Density Functional Theory [PDF]

open access: yesJournal of Chemical Theory and Computation, 2020
14 pages, 8 ...
Jeanmairet, Guillaume   +2 more
openaire   +5 more sources

Unveiling the Intramolecular Ionic Diels–Alder Reactions within Molecular Electron Density Theory

open access: yesChemistry, 2021
The intramolecular ionic Diels–Alder (IIDA) reactions of two dieniminiums were studied within the Molecular Electron Density Theory (MEDT) at the ωB97XD/6-311G(d,p) computational level.
Luis R. Domingo   +2 more
doaj   +1 more source

Molecular vibrational frequencies from analytic Hessian of constrained nuclear–electronic orbital density functional theory [PDF]

open access: yesThe Journal of Chemical Physics, 2021
Nuclear quantum effects are important in a variety of chemical and biological processes. The constrained nuclear–electronic orbital density functional theory (cNEO-DFT) has been developed to include nuclear quantum effects in energy surfaces. Herein, we develop the analytic Hessian for cNEO-DFT energy with respect to the change in nuclear (expectation)
Xi Xu, Yang Yang
openaire   +3 more sources

The Molecular Mechanism of the Formation of Four-Membered Cyclic Nitronates and Their Retro (3 + 2) Cycloaddition: A DFT Mechanistic Study

open access: yesMolecules, 2021
In the present work, the formation of the four-membered cyclic nitronates and the retro (3 + 2) cycloaddition (retro-32CA) reaction of the 4H-[1,2]oxazete 2-oxide were studied using the density functional theory method at the MPWB1K/6-311G(d,p ...
Agnieszka Kącka-Zych
doaj   +1 more source

Computation of Molecular Electron Affinities Using an Ensemble Density Functional Theory Method [PDF]

open access: yesThe Journal of Physical Chemistry A, 2020
The computation of electron attachment energies (electron affinities) was implemented in connection with an ensemble density functional theory method, the state-interaction state-averaged spin-restricted ensemble-referenced Kohn-Sham (SI-SA-REKS or SSR) method.
Michael Filatov   +3 more
openaire   +3 more sources

Unveiling the Chemistry of Higher-Order Cycloaddition Reactions within the Molecular Electron Density Theory

open access: yesChemistry, 2022
The higher-order cycloaddition (HOCA) reaction of tropone with cyclopentadiene (Cp) has been studied within the Molecular Electron Density Theory.
Luis R. Domingo   +2 more
doaj   +1 more source

Correlation-driven phenomena in periodic molecular systems from variational two-electron reduced density matrix theory [PDF]

open access: yesThe Journal of Chemical Physics, 2021
Correlation-driven phenomena in molecular periodic systems are challenging to predict computationally not only because such systems are periodically infinite but also because they are typically strongly correlated. Here, we generalize the variational two-electron reduced density matrix (2-RDM) theory to compute the energies and properties of strongly ...
Simon Ewing, David A. Mazziotti
openaire   +3 more sources

Experimental and Theoretical Mechanistic Study on the Thermal Decomposition of 3,3-diphenyl-4-(trichloromethyl)-5-nitropyrazoline

open access: yesMolecules, 2021
The present paper is a continuation of comprehensive study regarding to synthesis and properties of pyrazoles and their derivatives. In its framework an experimental and theoretical studies of thermal decomposition of the 3,3-diphenyl-4-(trichloromethyl)-
Karolina Kula   +5 more
doaj   +1 more source

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