Ivar Koppel

2.8k total citations
51 papers, 2.3k citations indexed

About

Ivar Koppel is a scholar working on Organic Chemistry, Physical and Theoretical Chemistry and Atomic and Molecular Physics, and Optics. According to data from OpenAlex, Ivar Koppel has authored 51 papers receiving a total of 2.3k indexed citations (citations by other indexed papers that have themselves been cited), including 31 papers in Organic Chemistry, 18 papers in Physical and Theoretical Chemistry and 17 papers in Atomic and Molecular Physics, and Optics. Recurrent topics in Ivar Koppel's work include Chemical Reaction Mechanisms (17 papers), Chemical Thermodynamics and Molecular Structure (9 papers) and Advanced Chemical Physics Studies (9 papers). Ivar Koppel is often cited by papers focused on Chemical Reaction Mechanisms (17 papers), Chemical Thermodynamics and Molecular Structure (9 papers) and Advanced Chemical Physics Studies (9 papers). Ivar Koppel collaborates with scholars based in Estonia, Spain and Japan. Ivar Koppel's co-authors include Ilmar A. Koppel, Ivo Leito, Peeter Burk, Masaaki Mishima, Agnes Kütt, Ivari Kaljurand, Toomas Rodima, Jaan Saame, Robert W. Taft and Takaaki Sonoda and has published in prestigious journals such as Journal of the American Chemical Society, Physical Review Letters and Angewandte Chemie International Edition.

In The Last Decade

Ivar Koppel

50 papers receiving 2.3k citations

Peers — A (Enhanced Table)

Peers by citation overlap · career bar shows stage (early→late) cites · hero ref

Name	h						Papers	Cites
Ivar Koppel Estonia	25	1.5k	571	558	489	454	51	2.3k
Shmaryahu Hoz Israel	26	1.6k 1.1×	362 0.6×	377 0.7×	419 0.9×	323 0.7×	147	2.4k
Masaaki Mishima Japan	26	2.0k 1.4×	685 1.2×	802 1.4×	372 0.8×	344 0.8×	149	2.5k
Boris Galabov Bulgaria	27	1.3k 0.9×	573 1.0×	585 1.0×	749 1.5×	235 0.5×	123	2.3k
Peeter Burk Estonia	24	974 0.7×	415 0.7×	372 0.7×	413 0.8×	490 1.1×	92	1.9k
Carol A. Deakyne United States	26	939 0.6×	751 1.3×	504 0.9×	625 1.3×	445 1.0×	95	2.2k
Giorgio Cerichelli Italy	27	1.6k 1.1×	598 1.0×	497 0.9×	354 0.7×	186 0.4×	90	2.0k
Donald H. Aue United States	30	1.9k 1.3×	585 1.0×	364 0.7×	521 1.1×	328 0.7×	66	2.7k
Allan D. Headley United States	25	1.9k 1.3×	450 0.8×	355 0.6×	487 1.0×	577 1.3×	67	2.8k
Vincent Tognetti France	25	827 0.6×	326 0.6×	653 1.2×	636 1.3×	304 0.7×	95	1.8k
Golam Rasul United States	33	2.2k 1.5×	1.0k 1.8×	397 0.7×	598 1.2×	922 2.0×	165	3.5k

Countries citing papers authored by Ivar Koppel

Since Specialization

Citations

This map shows the geographic impact of Ivar Koppel's research. It shows the number of citations coming from papers published by authors working in each country. You can also color the map by specialization and compare the number of citations received by Ivar Koppel with the expected number of citations based on a country's size and research output (numbers larger than one mean the country cites Ivar Koppel more than expected).

Fields of papers citing papers by Ivar Koppel

Since Specialization

Physical SciencesHealth SciencesLife SciencesSocial Sciences

This network shows the impact of papers produced by Ivar Koppel. Nodes represent research fields, and links connect fields that are likely to share authors. Colored nodes show fields that tend to cite the papers produced by Ivar Koppel. The network helps show where Ivar Koppel may publish in the future.

Co-authorship network of co-authors of Ivar Koppel

This figure shows the co-authorship network connecting the top 25 collaborators of Ivar Koppel. A scholar is included among the top collaborators of Ivar Koppel based on the total number of citations received by their joint publications. Widths of edges represent the number of papers authors have co-authored together. Node borders signify the number of papers an author published with Ivar Koppel. Ivar Koppel is excluded from the visualization to improve readability, since they are connected to all nodes in the network.

All Works

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20 of 20 papers shown

1.

Kaljurand, Ivari, Jaan Saame, Toomas Rodima, et al.. (2016). Experimental Basicities of Phosphazene, Guanidinophosphazene, and Proton Sponge Superbases in the Gas Phase and Solution. The Journal of Physical Chemistry A. 120(16). 2591–2604. 54 indexed citations

2.

Leito, Ivo, Ilmar A. Koppel, Ivar Koppel, et al.. (2015). Basicity Limits of Neutral Organic Superbases. Angewandte Chemie International Edition. 54(32). 9262–9265. 75 indexed citations

3.

Polyakova, Svetlana M., Ivana Cı́sařová, Jaan Saame, et al.. (2012). A New Class of Organosuperbases, N‐Alkyl‐ and N‐Aryl‐1,3‐dialkyl‐4,5‐dimethylimidazol‐2‐ylidene Amines: Synthesis, Structure, pK_BH+ Measurements, and Properties. Chemistry - A European Journal. 18(12). 3621–3630. 65 indexed citations

4.

Kütt, Agnes, Toomas Rodima, Эдуард Б. Русанов, et al.. (2008). Pentakis(trifluoromethyl)phenyl, a Sterically Crowded and Electron-withdrawing Group: Synthesis and Acidity of Pentakis(trifluoromethyl)benzene, -toluene, -phenol, and -aniline. The Journal of Organic Chemistry. 73(7). 2607–2620. 121 indexed citations

5.

Rõõm, Eva‐Ingrid, Agnes Kütt, Ivari Kaljurand, et al.. (2007). Brønsted Basicities of Diamines in the Gas Phase, Acetonitrile, and Tetrahydrofuran. Chemistry - A European Journal. 13(27). 7631–7643. 77 indexed citations

6.

Travnikova, Oksana, Signe Vahur, Ivo Leito, et al.. (2006). Influence of substituents on the infrared stretching frequencies of carbonyl group in esters of benzoic acid. Journal of Physical Organic Chemistry. 19(10). 654–663. 24 indexed citations

7.

Koppel, Ivar, et al.. (2005). Self-consistent acidity and basicity scales in nonaqueous solvents. Proceedings of the Estonian Academy of Sciences Chemistry. 54(2). 94–115. 1 indexed citations

8.

Abboud, José‐Luis M., Ibón Alkorta, Peeter Burk, et al.. (2004). The enormous apparent gas-phase acidity of cubylamine. Chemical Physics Letters. 398(4-6). 560–563. 6 indexed citations

9.

Abboud, José‐Luis M., et al.. (2003). Protonation of Cubane in the Gas Phase: A High‐Level Ab Initio and DFT Study. Angewandte Chemie International Edition. 42(9). 1044–1046. 18 indexed citations

10.

Abboud, José‐Luis M., Ilmar A. Koppel, Ibón Alkorta, et al.. (2003). Stereoelectronic, Strain, and Medium Effects on the Protonation of Cubylamine, a Janus‐like Base. Angewandte Chemie International Edition. 42(20). 2281–2285. 17 indexed citations

11.

Abboud, José‐Luis M., Ilmar A. Koppel, Ibón Alkorta, et al.. (2003). Stereoelectronic, Strain, and Medium Effects on the Protonation of Cubylamine, a Janus‐like Base. Angewandte Chemie. 115(20). 2383–2387. 3 indexed citations

12.

Abboud, José‐Luis M., et al.. (2003). Protonation of Cubane in the Gas Phase: A High‐Level Ab Initio and DFT Study. Angewandte Chemie. 115(9). 1074–1076. 6 indexed citations

13.

Koppel, Ilmar A., Juta Koppel, Ivo Leito, et al.. (2001). The enormous acidifying effect of the supersubstituent NSO2CF3 on the acidity of derivatives of benzenesulfonamide and toluene-p-sulfonamide in the gas phase and in dimethyl sulfoxide. Journal of the Chemical Society Perkin Transactions 2. 229–232. 43 indexed citations

14.

Burk, Peeter, Ilmar A. Koppel, Ivar Koppel, Ivo Leito, & Oksana Travnikova. (2000). Critical test of performance of B3LYP functional for prediction of gas-phase acidities and basicities. Chemical Physics Letters. 323(5-6). 482–489. 109 indexed citations

15.

Burk, Peeter, Ilmar A. Koppel, Ivar Koppel, L. M. YAGUPOL'SKII, & Robert W. Taft. (1996). Superacidity of neutral Br�nsted acids in gas phase. Journal of Computational Chemistry. 17(1). 30–41. 42 indexed citations

16.

Bosch, Elisabeth, Martı́ Rosés, Koit Herodes, et al.. (1996). Solute‐solvent and solvent‐solvent interactions in binary solvent mixtures. 2. Effect of temperature on the ET(30) polarity parameter of dipolar hydrogen bond acceptor‐hydrogen bond donor mixtures. Journal of Physical Organic Chemistry. 9(6). 403–410. 1 indexed citations

17.

Burk, Peeter, Koit Herodes, Ivar Koppel, & Ilmar A. Koppel. (1993). Critical test ofPM3-calculated proton affinities. International Journal of Quantum Chemistry. 48(S27). 633–641. 15 indexed citations

18.

Taft, Robert W., Ivar Koppel, R. D. Topsom, & Frederick Anvia. (1990). Acidities of OH compounds, including alcohols, phenol, carboxylic acids, and mineral acids. Journal of the American Chemical Society. 112(6). 2047–2052. 96 indexed citations

19.

Koppel, Ivar, et al.. (1985). Mass difference of the /sup 3/T--/sup 3/He doublet and the problem of the rest mass of the electron antineutrino. Soviet physics. Doklady. 20. 393.

20.

Koppel, Ivar, et al.. (1984). Measurement of the mass difference between tritium and helium-3 ions by a high-resolution ion-cyclotron-resonance method. 39. 529. 1 indexed citations

Rankless uses publication and citation data sourced from OpenAlex, an open and comprehensive bibliographic database. While OpenAlex provides broad and valuable coverage of the global research landscape, it—like all bibliographic datasets—has inherent limitations. These include incomplete records, variations in author disambiguation, differences in journal indexing, and delays in data updates. As a result, some metrics and network relationships displayed in Rankless may not fully capture the entirety of a scholar's output or impact.

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