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Robert G. Parr

D-Index & Metrics

Chemistry

D-Index
89
Citations
189148
World Ranking
2120
National Ranking
765

Physics

D-Index
94
Citations
194044
World Ranking
1949
National Ranking
1008

Robert G. Parr publication distribution in Physics in 2026

The chart shows the distribution of publications by all Research.com ranked scientists in the field of Physics in 2026. The highlighted bar marks where Robert G. Parr sits on this spectrum.

103–122 publications: 7 scientists 123–142 publications: 10 scientists 143–162 publications: 31 scientists 163–182 publications: 35 scientists 183–202 publications: 53 scientists 203–222 publications: 81 scientists 223–242 publications: 85 scientists 243–262 publications: 112 scientists 263–282 publications: 114 scientists 283–302 publications: 126 scientists 303–322 publications: 136 scientists 323–342 publications: 162 scientists 343–362 publications: 155 scientists 363–382 publications: 156 scientists 383–402 publications: 134 scientists 403–422 publications: 145 scientists 423–442 publications: 147 scientists 443–462 publications: 131 scientists 463–482 publications: 131 scientists 483–502 publications: 116 scientists 503–522 publications: 106 scientists 523–542 publications: 103 scientists 543–562 publications: 87 scientists 563–582 publications: 84 scientists 583–602 publications: 94 scientists 603–622 publications: 70 scientists 623–642 publications: 76 scientists 643–662 publications: 60 scientists 663–682 publications: 54 scientists 683–702 publications: 60 scientists 703–722 publications: 48 scientists 723–742 publications: 64 scientists 743–762 publications: 48 scientists 763–782 publications: 37 scientists 783–802 publications: 43 scientists 803–822 publications: 34 scientists 823–842 publications: 36 scientists 843–862 publications: 32 scientists 863–882 publications: 32 scientists 883–902 publications: 31 scientists 903–922 publications: 25 scientists 923–942 publications: 15 scientists 943–962 publications: 24 scientists 963–982 publications: 13 scientists 983–1,002 publications: 21 scientists 1,003–1,022 publications: 21 scientists 1,023–1,042 publications: 16 scientists 1,043–1,062 publications: 9 scientists 1,063–1,082 publications: 19 scientists 1,083–1,102 publications: 11 scientists 1,103–1,122 publications: 17 scientists 1,123–1,142 publications: 11 scientists 1,143–1,162 publications: 7 scientists 1,163–1,182 publications: 4 scientists 1,183–1,202 publications: 10 scientists 1,203–1,222 publications: 8 scientists 1,223–1,242 publications: 16 scientists 1,243–1,262 publications: 4 scientists 1,263–1,282 publications: 10 scientists 1,283–1,302 publications: 5 scientists 1,303–1,322 publications: 7 scientists 1,323–1,342 publications: 4 scientists 1,343–1,362 publications: 8 scientists 1,363–1,382 publications: 6 scientists 1,383–1,402 publications: 7 scientists 1,403–1,422 publications: 3 scientists 1,423–1,442 publications: 4 scientists 1,443–1,462 publications: 4 scientists 1,463–1,468 publications: 3 scientists 1,469+ publications: 100 scientists
103 publications 1,469+

This scientist: 286 publications — 15th percentile

15% of scientists in this discipline score the same or lower.

The last bar groups every scientist with 1,469 publications or more.

Robert G. Parr D-index placement in Physics in 2026

The chart shows the D-index (discipline H-index) distribution of Physics scientists ranked by Research.com in 2026. The highlighted bar marks where Robert G. Parr sits on this spectrum.

70–71 D-Index: 76 scientists 72–73 D-Index: 110 scientists 74–75 D-Index: 143 scientists 76–77 D-Index: 153 scientists 78–79 D-Index: 144 scientists 80–81 D-Index: 167 scientists 82–83 D-Index: 167 scientists 84–85 D-Index: 166 scientists 86–87 D-Index: 132 scientists 88–89 D-Index: 155 scientists 90–91 D-Index: 134 scientists 92–93 D-Index: 137 scientists 94–95 D-Index: 102 scientists 96–97 D-Index: 112 scientists 98–99 D-Index: 110 scientists 100–101 D-Index: 116 scientists 102–103 D-Index: 97 scientists 104–105 D-Index: 103 scientists 106–107 D-Index: 87 scientists 108–109 D-Index: 90 scientists 110–111 D-Index: 67 scientists 112–113 D-Index: 78 scientists 114–115 D-Index: 75 scientists 116–117 D-Index: 67 scientists 118–119 D-Index: 69 scientists 120–121 D-Index: 60 scientists 122–123 D-Index: 59 scientists 124–125 D-Index: 53 scientists 126–127 D-Index: 42 scientists 128–129 D-Index: 41 scientists 130–131 D-Index: 33 scientists 132–133 D-Index: 32 scientists 134–135 D-Index: 45 scientists 136–137 D-Index: 19 scientists 138–139 D-Index: 24 scientists 140–141 D-Index: 28 scientists 142–143 D-Index: 31 scientists 144–145 D-Index: 22 scientists 146–147 D-Index: 20 scientists 148–149 D-Index: 12 scientists 150–151 D-Index: 16 scientists 152–153 D-Index: 24 scientists 154–155 D-Index: 23 scientists 156–157 D-Index: 15 scientists 158–159 D-Index: 15 scientists 160–161 D-Index: 11 scientists 162–163 D-Index: 17 scientists 164–165 D-Index: 12 scientists 166–167 D-Index: 11 scientists 168–169 D-Index: 9 scientists 170–171 D-Index: 9 scientists 172–173 D-Index: 11 scientists 174–175 D-Index: 4 scientists 176–177 D-Index: 8 scientists 178–179 D-Index: 5 scientists 180–181 D-Index: 3 scientists 182–183 D-Index: 4 scientists 184 D-Index: 4 scientists 185+ D-Index: 99 scientists
70 D-Index 185+

This scientist: 94 D-Index — 47th percentile

47% of scientists in this discipline score the same or lower.

The last bar groups every scientist with 185 D-Index or more.

Overview

Robert G. Parr was affiliated with the University of North Carolina at Chapel Hill in the United States. Their research contributions focused on various topics within physical and theoretical chemistry, atomic and molecular physics, and materials chemistry.

Their published works explored advanced themes in chemical and physical molecular interactions, including thermal and kinetic analysis as well as chemical physics studies. The main topics associated with their research included:

  • Advanced Physical and Chemical Molecular Interactions
  • Advanced Chemical Physics Studies
  • Thermal and Kinetic Analysis

Robert G. Parr's recent papers, all published through UNC Libraries in 2021, encompassed the following:

  • "Is it impossible to find the universal density functional? Or is it just well-hidden?" (2021)
  • "Expansion of the density-functional energy components E c and T c in terms of moments of the electron density" (2021)
  • "Density-functional formulas for atomic electronic energy components in terms of moments of the electron density" (2021)

Their frequent collaborators included researchers Shubin Liu, Á. Nagy, and Paul W. Ayers, who co-authored multiple papers with them, indicating ongoing collaborative research relationships.

Robert G. Parr's work was primarily disseminated through UNC Libraries, the main venue for their publications. Their research contributions intersected multiple subfields, particularly:

  • Physical and Theoretical Chemistry
  • Atomic and Molecular Physics, and Optics
  • Materials Chemistry

Robert G. Parr's academic output reflects a focus on theoretical formulations and expansions related to electron density and energy components in atomic and molecular systems, contributing to foundational areas of chemistry and physics.

Best Publications

  • Development of the Colle-Salvetti correlation-energy formula into a functional of the electron density

    Chengteh Lee;Weitao Yang;Robert G. Parr

  • Density-functional theory of atoms and molecules

    Robert G. Parr

  • Absolute hardness: companion parameter to absolute electronegativity

    Robert G. Parr;Ralph G. Pearson

  • Electronegativity: The density functional viewpoint

    Robert G. Parr;Robert A. Donnelly;Mel Levy;William E. Palke

  • Density Functional Theory of Electronic Structure

    W. Kohn;and A. D. Becke;R. G. Parr

  • Density functional approach to the frontier-electron theory of chemical reactivity

    Robert G. Parr;Weitao Yang

  • Density-Functional Theory for Fractional Particle Number: Derivative Discontinuities of the Energy

    John P. Perdew;Robert G. Parr;Mel Levy;Jose L. Balduz

  • A Semi‐Empirical Theory of the Electronic Spectra and Electronic Structure of Complex Unsaturated Molecules. II

    Rudolph Pariser;Robert G. Parr

  • Hardness, softness, and the fukui function in the electronic theory of metals and catalysis.

    Weitao Yang;Robert G. Parr

  • Principle of maximum hardness

    Robert G. Parr;Pratim K. Chattaraj

  • Density-Functional Theory of the Electronic Structure of Molecules

    Robert G. Parr;Weitao Yang

  • Variational Principles for Describing Chemical Reactions: The Fukui Function and Chemical Hardness Revisited

    Paul W. Ayers;Robert G. Parr

  • Activation hardness: new index for describing the orientation of electrophilic aromatic substitution

    Zhongxiang Zhou;Robert G. Parr

  • Density Functional Theory

    Robert G. Parr

  • New alternative to the Dunham potential for diatomic molecules

    Gary Simons;Robert G. Parr;J. Michael Finlan

  • Electron density, Kohn−Sham frontier orbitals, and Fukui functions

    Weitao Yang;Robert G. Parr;R. Pucci

  • From electron densities to Kohn-Sham kinetic energies, orbital energies, exchange-correlation potentials, and exchange-correlation energies.

    Qingsheng Zhao;Qingsheng Zhao;Robert C. Morrison;Robert C. Morrison;Robert G. Parr;Robert G. Parr

  • What is an atom in a molecule

    Robert G. Parr;Paul W. Ayers;Roman F. Nalewajski

  • New measures of aromaticity: absolute hardness and relative hardness

    Zhongxiang Zhou;Robert G. Parr

  • Molecular hardness and softness, local hardness and softness, hardness and softness kernels, and relations among these quantities

    Max L Berkowitz;Robert G. Parr

Frequent Co-Authors

Shubin Liu
Shubin Liu University of North Carolina at Chapel Hill
Paul W. Ayers
Paul W. Ayers McMaster University
Weitao Yang
Weitao Yang Duke University
Pratim K. Chattaraj
Pratim K. Chattaraj Birla Institute of Technology, Mesra
Swapan K. Ghosh
Swapan K. Ghosh Homi Bhabha National Institute
Alfred B. Anderson
Alfred B. Anderson Case Western Reserve University
Shridhar R. Gadre
Shridhar R. Gadre Savitribai Phule Pune University
Frank De Proft
Frank De Proft Vrije Universiteit Brussel
Peter Politzer
Peter Politzer University of New Orleans
Max L. Berkowitz
Max L. Berkowitz University of North Carolina at Chapel Hill

External Links

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Best Scientists Citing Robert G. Parr

Henry F. Schaefer

Henry F. Schaefer

University of Georgia

Publications: 332

Ibon Alkorta

Ibon Alkorta

Spanish National Research Council

Publications: 269

José Elguero

José Elguero

Spanish National Research Council

Publications: 266

Paul Geerlings

Paul Geerlings

Vrije Universiteit Brussel

Publications: 260

Pratim K. Chattaraj

Pratim K. Chattaraj

Birla Institute of Technology, Mesra

Publications: 248

Paul W. Ayers

Paul W. Ayers

McMaster University

Publications: 218

Luis R. Domingo

Luis R. Domingo

University of Valencia

Publications: 217

Yaoming Xie

Yaoming Xie

University of Georgia

Publications: 212

David A. Dixon

David A. Dixon

University of Alabama

Publications: 198

Nino Russo

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University of Calabria

Publications: 196

Weitao Yang

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Duke University

Publications: 189

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Alexander M. Mebel

Alexander M. Mebel

Florida International University

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Frank Neese

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