Student or educator? Sign up with your school email and get 6 months of Pro free.
Cited by 164

The DOI matches its Crossref record.

C2 V Insertion pathway for BeH2: A test problem for the coupled‐cluster single and double excitation model

Purvis, George D., Shepard, Ron, Brown, Franklin B., Bartlett, Rodney J.·1983·International Journal of Quantum Chemistry

Abstract

The coupled‐cluster single and double excitation model (CCSD) is applied to an energy path for the insertion of Be into H 2 and compared to the full configuration interaction (FCI) and full valence–multiconfiguration self‐consistent field (FV–MCSCF) results. This model problem is a severe test of a single‐reference‐function correlated method since two configurations are heavily weighted in the FCI description. CCSD is demonstrated to describe the FCI results using a single reference function which, however, changes orbital characteristics along the sampling path. In this case CCSD gives excellent agreement with the FCI results.

Overview

The claims and statistics of this paper haven’t been checked yet.

Run the check — free, no account needed. It reads the open-access text and checks the sources it cites.

A few free checks a day · papers already verified open instantly · results are public

Integrity signals

Registry

Crossref · 10.1002/qua.560230307

Cites

Statistics

Verification

Claims the paper makes

The claims and statistics of this paper haven’t been checked yet.

Run the check — free, no account needed. It reads the open-access text and checks the sources it cites.

A few free checks a day · papers already verified open instantly · results are public

Self-check

Percentages, sums and reported differences re-computed from the paper’s own numbers.

The self-check needs the paper’s full text.

Citations

Cited by

See all 164

Metadata

Authors
Purvis, G. D., Shepard, R., Brown, F. B., & Bartlett, R. J.
Venue
International Journal of Quantum Chemistry
Publisher
Wiley
Published
1983-03
Volume
23
Issue
3
Pages
835-845
ISSN
  • 0020-7608 (ISSN-L)
  • 1097-461X
OpenAlex
W2054533336
Cited by
164
References
0
FWCI
5.21
Type
journal article
Language
en
Open access
closed

About these checks

Registry, retraction, Cites and statistics results are computed, not judged, with one exception: a printed reference that no index lists is read once by a model before it counts as a citation error. Claims are extracted by a model and kept only when their quote appears verbatim in the text; each cited source is then checked, with a model’s help, for whether it says what the claim relies on. Those verdicts can be wrong — read the claim’s quote and the cited source before relying on one.

Statistics and arithmetic are recomputed, not judged.

Confidence bands are shown only for fields calibrated on our annotated test set. None is calibrated yet, so no band is shown.

What counts as a claim ›How we measure confidence ›How we check this ›

Are you an author, or do you see a problem with this page? Request a review

How to cite

Cite CoChat for the checks on this page, and the paper for its own findings.

This page
CoChat. (2026). Citation check: C2 V Insertion pathway for BeH2: A test problem for the coupled‐cluster single and double excitation model. https://app.cochat.ai/papers/10.1002/qua.560230307
The paper
Purvis, G. D., Shepard, R., Brown, F. B., & Bartlett, R. J. (1983). C2 V Insertion pathway for BeH2: A test problem for the coupled‐cluster single and double excitation model. International Journal of Quantum Chemistry. https://doi.org/10.1002/qua.560230307

Data sources

Bibliographic data: Semantic Scholar, OpenAlex, Crossref.

Contains information from the Semantic Scholar Academic Graph Datasets, made available under the ODC Attribution License (ODC-BY 1.0).

Semantic Scholar’s data is described in: Kinney, R., et al. (2023). The Semantic Scholar Open Data Platform. arXiv:2301.10140.