Ilmar A. Koppel

6.8k total citations · 1 hit paper
124 papers, 5.8k citations indexed

About

Ilmar A. Koppel is a scholar working on Organic Chemistry, Spectroscopy and Physical and Theoretical Chemistry. According to data from OpenAlex, Ilmar A. Koppel has authored 124 papers receiving a total of 5.8k indexed citations (citations by other indexed papers that have themselves been cited), including 79 papers in Organic Chemistry, 41 papers in Spectroscopy and 40 papers in Physical and Theoretical Chemistry. Recurrent topics in Ilmar A. Koppel's work include Chemical Reaction Mechanisms (48 papers), Advanced Chemical Physics Studies (25 papers) and Analytical Chemistry and Chromatography (20 papers). Ilmar A. Koppel is often cited by papers focused on Chemical Reaction Mechanisms (48 papers), Advanced Chemical Physics Studies (25 papers) and Analytical Chemistry and Chromatography (20 papers). Ilmar A. Koppel collaborates with scholars based in Estonia, Japan and Spain. Ilmar A. Koppel's co-authors include Ivo Leito, Ivari Kaljurand, Toomas Rodima, Agnes Kütt, Ivar Koppel, Vahur Mäemets, Peeter Burk, Lilli Sooväli, L. M. YAGUPOL'SKII and Masaaki Mishima and has published in prestigious journals such as Journal of the American Chemical Society, Angewandte Chemie International Edition and The Journal of Physical Chemistry.

In The Last Decade

Ilmar A. Koppel

123 papers receiving 5.7k citations

Hit Papers

align trajectories

What are hit papers?

Hit papers significantly outperform the citation benchmark for their cohort. A paper qualifies if it has ≥500 total citations, achieves ≥1.5× the top-1% citation threshold for papers in the same subfield and year (this is the minimum needed to enter the top 1%, not the average within it), or reaches the top citation threshold in at least one of its specific research topics.

Extension of the Self-Consistent Spectrophotometric Basicity Scale in Acetonitrile to a Full Span of 28 pK_a Units: Unification of Different Basicity Scales

2005 853 citations Ivari Kaljurand, Agnes Kütt et al. The Journal of Organic Chemistry profile →

Peers

Countries citing papers authored by Ilmar A. Koppel

Since Specialization

Citations

This map shows the geographic impact of Ilmar A. 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 Ilmar A. Koppel with the expected number of citations based on a country's size and research output (numbers larger than one mean the country cites Ilmar A. Koppel more than expected).

Fields of papers citing papers by Ilmar A. Koppel

Since Specialization

Physical SciencesHealth SciencesLife SciencesSocial Sciences

This network shows the impact of papers produced by Ilmar A. 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 Ilmar A. Koppel. The network helps show where Ilmar A. Koppel may publish in the future.

Co-authorship network of co-authors of Ilmar A. Koppel

This figure shows the co-authorship network connecting the top 25 collaborators of Ilmar A. Koppel. A scholar is included among the top collaborators of Ilmar A. 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 Ilmar A. Koppel. Ilmar A. 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

#	Work	Indexed citations
1	A unified view to Brønsted acidity scales: do we need solvated protons? 2017 ·Chemical Science ·Eno Paenurk, Karl Kaupmees, Daniel Himmel, Agnes Kütt, Ivari Kaljurand, Ilmar A. Koppel, Ingo Krossing, Ivo Leito	73
2	Basicity Limits of Neutral Organic Superbases 2015 ·Angewandte Chemie ·Ivo Leito, Ilmar A. Koppel, (unknown), (unknown), Karl Kaupmees, Sofja Tshepelevitsh, Jaan Saame	12
3	Basicity Limits of Neutral Organic Superbases 2015 ·Angewandte Chemie International Edition ·Ivo Leito, Ilmar A. Koppel, Ivar Koppel, Karl Kaupmees, Sofja Tshepelevitsh, Jaan Saame	75
4	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 2012 ·Chemistry - A European Journal ·(unknown), Svetlana M. Polyakova, (unknown), Ivana Cı́sařová, Jaan Saame, (unknown), Ivar Koppel, Ilmar A. Koppel, Agnes Kütt, Ivo Leito, Ilya M. Lyapkalo	65
5	Equilibrium Acidities of Superacids 2010 ·The Journal of Organic Chemistry ·Agnes Kütt, Toomas Rodima, Jaan Saame, (unknown), Vahur Mäemets, Ivari Kaljurand, Ilmar A. Koppel, Romute Yu. Garlyauskayte, Yurii L. Yagupolskii, L. M. YAGUPOL'SKII, Eduard Bernhardt, Helge Willner, Ivo Leito	238
6	Brønsted Basicities of Diamines in the Gas Phase, Acetonitrile, and Tetrahydrofuran 2007 ·Chemistry - A European Journal ·Eva‐Ingrid Rõõm, Agnes Kütt, Ivari Kaljurand, Ivar Koppel, Ivo Leito, Ilmar A. Koppel, Masaaki Mishima, Kenta Goto, Yuji Miyahara	77
7	Influence of substituents on the infrared stretching frequencies of carbonyl group in esters of benzoic acid 2006 ·Journal of Physical Organic Chemistry ·(unknown), Oksana Travnikova, Signe Vahur, Ivo Leito, Mare Piirsalu, Vahur Mäemets, Ivar Koppel, Ilmar A. Koppel, (unknown), (unknown)	24
8	Basicity of some P₁phosphazenes in water and in aqueous surfactant solution 2006 ·Organic & Biomolecular Chemistry ·Lilli Sooväli, Toomas Rodima, Ivari Kaljurand, Agnes Kütt, Ilmar A. Koppel, Ivo Leito	25
9	The enormous apparent gas-phase acidity of cubylamine 2004 ·Chemical Physics Letters ·José‐Luis M. Abboud, Ibón Alkorta, Peeter Burk, Juan Z. Dávalos, (unknown), Ernest W. Della, Ilmar A. Koppel, Ivar Koppel, (unknown), (unknown)	6
10	Protonation of Cubane in the Gas Phase: A High‐Level Ab Initio and DFT Study 2003 ·Angewandte Chemie International Edition ·José‐Luis M. Abboud, Ilmar A. Koppel, Juan Z. Dávalos, Peeter Burk, Ivar Koppel, (unknown)	18
11	Stereoelectronic, Strain, and Medium Effects on the Protonation of Cubylamine, a Janus‐like Base 2003 ·Angewandte Chemie International Edition ·José‐Luis M. Abboud, Ilmar A. Koppel, Ibón Alkorta, Ernest W. Della, Paul Müller, Juan Z. Dávalos, Peeter Burk, Ivar Koppel, Viljar Pihl, (unknown)	17
12	Stereoelectronic, Strain, and Medium Effects on the Protonation of Cubylamine, a Janus‐like Base 2003 ·Angewandte Chemie ·José‐Luis M. Abboud, Ilmar A. Koppel, Ibón Alkorta, Ernest W. Della, Paul Müller, Juan Z. Dávalos, Peeter Burk, Ivar Koppel, Viljar Pihl, (unknown)	3
13	Quantum chemical calculations of geometries and gas-phase deprotonation energies of linear polyyne chains 2001 ·International Journal of Quantum Chemistry ·(unknown), Peeter Burk, Ilmar A. Koppel	18
14	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 2001 ·Journal of the Chemical Society Perkin Transactions 2 ·Ilmar A. Koppel, Juta Koppel, Ivo Leito, Ivar Koppel, Masaaki Mishima, L. M. YAGUPOL'SKII	43
15	Solute-solvent and solvent-solvent interactions in binary solvent mixtures. Part 8. TheET(30) polarity of binary mixtures of formamides with hydroxylic solvents 1999 ·Journal of Physical Organic Chemistry ·Koit Herodes, Ivo Leito, Ilmar A. Koppel, Martı́ Rosés	79
16	17O and 1H NMR chemical shifts of hydroxide and hydronium ion in aqueous solutions of strong electrolytes 1997 ·Journal of the Chemical Society Faraday Transactions ·Vahur Mäemets, Ilmar A. Koppel	20
17	Report of the Visual Handicap Group. 1996 ·PubMed ·Eva M. Kohner, (unknown), Justin M. Andrews, (unknown), Frances M. Brown, (unknown), Megan M. Gray, (unknown), Ilmar A. Koppel, Barbara Martin, (unknown), (unknown), Mark Sculpher, FRITZ B. TALBOT, Neil Vaughan, James S. Wilkinson	9
18	¹⁷O and¹H chemical shifts of water in solutions of some ammonium salts: evaluation of the anionic effect on the¹⁷O and¹H chemical shifts of water in aqueous solutions of mineral acids 1996 ·Journal of the Chemical Society Faraday Transactions ·Vahur Mäemets, Ilmar A. Koppel	5
19	Superacidity of neutral Br�nsted acids in gas phase 1996 ·Journal of Computational Chemistry ·Peeter Burk, Ilmar A. Koppel, Ivar Koppel, L. M. YAGUPOL'SKII, Robert W. Taft	42
20	Cognitive function in hypertension: a community based study. 1993 ·PubMed ·(unknown), (unknown), A. E. Fletcher, (unknown), Richard G. Brown, (unknown), (unknown), T Jamieson, Ilmar A. Koppel, Sarah Fraser	43

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