[HTML][HTML] Recent developments in the PySCF program package

Q Sun, X Zhang, S Banerjee, P Bao, M Barbry… - The Journal of …, 2020 - pubs.aip.org
P y SCF is a Python-based general-purpose electronic structure platform that supports first-
principles simulations of molecules and solids as well as accelerates the development of …

The quantum-chemical calculation of NMR indirect spin–spin coupling constants

T Helgaker, M Jaszuński, M Pecul - Progress in Nuclear Magnetic …, 2008 - Elsevier
We present here a review of currently available methods for the calculation of indirect
nuclear spin–spin coupling constants, discussing some of the questions and difficulties …

[BOOK][B] Relativistic quantum chemistry: the fundamental theory of molecular science

M Reiher, A Wolf - 2015 - books.google.com
Einstein proposed his theory of special relativity in 1905. For a long time it was believed that
this theory has no significant impact on chemistry. This view changed in the 1970s when it …

NMR Coupling Constants Based on the Bethe–Salpeter Equation in the GW Approximation

YJ Franzke, C Holzer, F Mack - Journal of Chemical Theory and …, 2022 - ACS Publications
We present the first steps to extend the Green's function GW method and the Bethe–Salpeter
equation (BSE) to molecular response properties such as nuclear magnetic resonance …

Reducing Exact Two-Component Theory for NMR Couplings to a One-Component Approach: Efficiency and Accuracy

YJ Franzke - Journal of Chemical Theory and Computation, 2023 - ACS Publications
The self-consistent and complex spin–orbit exact two-component (X2C) formalism for NMR
spin–spin coupling constants [J. Chem. Theory Comput. 17, 2021, 3874− 3994] is reduced …

The effect of lone pairs and electronegativity on the indirect nuclear spin–spin coupling constants in NH, O, S): Ab initio calculations using optimized …

PF Provasi, GA Aucar, SPA Sauer - The Journal of Chemical Physics, 2001 - pubs.aip.org
The indirect nuclear spin–spin coupling constants of C 2 H 4, CH 2 NH, CH 2 O, and CH 2 S
were investigated by means of correlated ab initio calculations at the level of the second …

NMR Indirect Spin–Spin Coupling Constants in a Modern Quasi-Relativistic Density Functional Framework

YJ Franzke, F Mack, F Weigend - Journal of Chemical Theory and …, 2021 - ACS Publications
A quasi-relativistic implementation of NMR indirect spin–spin coupling constants is
presented. The exact two-component (X2C) Hamiltonian and its diagonal local …

Paramagnetic NMR shielding tensors and ring currents: efficient implementation and application to heavy element compounds

S Gillhuber, YJ Franzke, F Weigend - The Journal of Physical …, 2021 - ACS Publications
We present an efficient implementation of paramagnetic NMR shielding tensors and shifts in
a nonrelativistic and scalar-relativistic density functional theory framework. For the latter, we …

Quantum chemical approaches to the calculation of NMR parameters: From fundamentals to recent advances

IL Rusakova - Magnetochemistry, 2022 - mdpi.com
Quantum chemical methods for the calculation of indirect NMR spin–spin coupling constants
and chemical shifts are always in progress. They never stay the same due to permanently …

Hyperfine coupling constants in local exact two-component theory

YJ Franzke, JM Yu - Journal of Chemical Theory and Computation, 2021 - ACS Publications
We present a highly efficient implementation of the electron–nucleus hyperfine coupling
matrix within the one-electron exact two-component (X2C) theory. The complete derivative of …