Consistent descriptions of metal–ligand bonds and spin-crossover in inorganic chemistry

KP Kepp - Coordination Chemistry Reviews, 2013 - Elsevier
Density functional theory (DFT) is today the unchallenged tool for routinely obtaining
molecular information on chemical stability, reactivity, and electronic structure across the …

Biorthogonal moment expansions in coupled-cluster theory: Review of key concepts and merging the renormalized and active-space coupled-cluster methods

J Shen, P Piecuch - Chemical Physics, 2012 - Elsevier
After reviewing recent progress in the area of the development of coupled-cluster (CC)
methods for quasi-degenerate electronic states that are characterized by stronger non …

Doubly electron-attached and doubly ionized equation-of-motion coupled-cluster methods with 4-particle–2-hole and 4-hole–2-particle excitations and their active …

J Shen, P Piecuch - The Journal of chemical physics, 2013 - pubs.aip.org
The full and active-space doubly electron-attached (DEA) and doubly ionized (DIP) equation-
of-motion coupled-cluster (EOMCC) methods with up to 4-particle–2-hole (4p-2h) and 4-hole …

Combining active-space coupled-cluster methods with moment energy corrections via the CC (P; Q) methodology, with benchmark calculations for biradical transition …

J Shen, P Piecuch - The Journal of chemical physics, 2012 - pubs.aip.org
We have recently suggested the CC (P; Q) methodology that can correct energies obtained
in the active-space coupled-cluster (CC) or equation-of-motion (EOM) CC calculations …

Combining active-space coupled-cluster approaches with moment energy corrections via the CC(P;Q) methodology: connected quadruple excitations

NP Bauman, J Shen, P Piecuch - Molecular Physics, 2017 - Taylor & Francis
We have recently proposed the CC (P; Q) methodology that provides a systematic approach
to correcting the energies obtained in active-space coupled-cluster (CC) calculations for the …

Merging Active-Space and Renormalized Coupled-Cluster Methods via the CC(P;Q) Formalism, with Benchmark Calculations for Singlet–Triplet Gaps in Biradical …

J Shen, P Piecuch - Journal of Chemical Theory and Computation, 2012 - ACS Publications
We have recently developed a flexible form of the method of moments of coupled-cluster
(CC) equations and the CC (P; Q) hierarchy, which enable one to correct the CC and …

[HTML][HTML] High-level coupled-cluster energetics by Monte Carlo sampling and moment expansions: Further details and comparisons

JE Deustua, J Shen, P Piecuch - The Journal of Chemical Physics, 2021 - pubs.aip.org
We recently proposed a novel approach to converging electronic energies equivalent to
high-level coupled-cluster (CC) computations by combining the deterministic CC (P; Q) …

Intricacies of van der Waals interactions in systems with elongated bonds revealed by electron-groups embedding and high-level coupled-cluster approaches

E Pastorczak, J Shen, M Hapka… - Journal of chemical …, 2017 - ACS Publications
Noncovalent interactions between molecules with stretched intramonomer covalent bonds
are a fascinating, yet little studied area. This shortage of information stems largely from the …

The externally corrected coupled cluster approach with four-and five-body clusters from the CASSCF wave function

E Xu, S Li - The Journal of chemical physics, 2015 - pubs.aip.org
An externally corrected CCSDt (coupled cluster with singles, doubles, and active triples)
approach employing four-and five-body clusters from the complete active space self …

New coupled cluster approaches based on the unrestricted Hartree–Fock reference for treating molecules with multireference character

J Shen, E Xu, Z Kou, S Li - Physical Chemistry Chemical Physics, 2011 - pubs.rsc.org
Here we review the basic formalism, implementation details, and performance of two newly
developed coupled cluster (CC) methods based on the unrestricted Hartree–Fock (UHF) …