Charles E. Klopfenstein

526 total citations
25 papers, 385 citations indexed

About

Charles E. Klopfenstein is a scholar working on Organic Chemistry, Physical and Theoretical Chemistry and Molecular Biology. According to data from OpenAlex, Charles E. Klopfenstein has authored 25 papers receiving a total of 385 indexed citations (citations by other indexed papers that have themselves been cited), including 14 papers in Organic Chemistry, 4 papers in Physical and Theoretical Chemistry and 3 papers in Molecular Biology. Recurrent topics in Charles E. Klopfenstein's work include Chemical Reaction Mechanisms (4 papers), Synthesis of heterocyclic compounds (3 papers) and Analytical Chemistry and Chromatography (3 papers). Charles E. Klopfenstein is often cited by papers focused on Chemical Reaction Mechanisms (4 papers), Synthesis of heterocyclic compounds (3 papers) and Analytical Chemistry and Chromatography (3 papers). Charles E. Klopfenstein collaborates with scholars based in United States. Charles E. Klopfenstein's co-authors include L. H. Klemm, Reinhard Zell, Richard A. Klemm, V. Boekelheide, Reginald H. Mitchell, Lisa M. Cousins, Thomas Koenig, K. W. Gopinath, I. T. Barnish and J. Shabtai and has published in prestigious journals such as Journal of the American Chemical Society, The Journal of Organic Chemistry and Journal of Chromatography A.

In The Last Decade

Charles E. Klopfenstein

25 papers receiving 352 citations

Peers — A (Enhanced Table)

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

Name h Career Trend Papers Cites
Charles E. Klopfenstein United States 13 276 67 63 54 43 25 385
Lloyd N. Ferguson United States 11 176 0.6× 66 1.0× 87 1.4× 52 1.0× 53 1.2× 36 373
Gerritt P. Bean United States 9 409 1.5× 132 2.0× 40 0.6× 45 0.8× 58 1.3× 19 555
R. G. PEWS United States 13 329 1.2× 40 0.6× 44 0.7× 47 0.9× 45 1.0× 52 423
Gianlorenzo Marino Italy 13 352 1.3× 51 0.8× 77 1.2× 39 0.7× 58 1.3× 39 464
Herbert M. Blatter 9 242 0.9× 73 1.1× 65 1.0× 74 1.4× 65 1.5× 18 398
Alexander Perjéssy Slovakia 12 332 1.2× 43 0.6× 107 1.7× 50 0.9× 64 1.5× 86 450
Craig E. Mixan United States 8 190 0.7× 60 0.9× 87 1.4× 43 0.8× 54 1.3× 10 313
M. JAWDOSIUK United States 14 323 1.2× 48 0.7× 49 0.8× 68 1.3× 86 2.0× 34 413
A. G. Yurchenko Ukraine 11 219 0.8× 61 0.9× 57 0.9× 31 0.6× 46 1.1× 52 350
A. Forchioni France 12 132 0.5× 77 1.1× 95 1.5× 52 1.0× 51 1.2× 38 326

Countries citing papers authored by Charles E. Klopfenstein

Since Specialization
Citations

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

Fields of papers citing papers by Charles E. Klopfenstein

Since Specialization
Physical SciencesHealth SciencesLife SciencesSocial Sciences

This network shows the impact of papers produced by Charles E. Klopfenstein. 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 Charles E. Klopfenstein. The network helps show where Charles E. Klopfenstein may publish in the future.

Co-authorship network of co-authors of Charles E. Klopfenstein

This figure shows the co-authorship network connecting the top 25 collaborators of Charles E. Klopfenstein. A scholar is included among the top collaborators of Charles E. Klopfenstein 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 Charles E. Klopfenstein. Charles E. Klopfenstein is excluded from the visualization to improve readability, since they are connected to all nodes in the network.

All Works

20 of 20 papers shown
1.
Klemm, L. H., et al.. (1989). The insertion and extrusion of heterosulfur bridges. XVI. Synthesis of triphenyleno[1,12‐bcd:4,5‐b'c'd']dithiophene. Journal of Heterocyclic Chemistry. 26(2). 345–348. 17 indexed citations
2.
Klemm, L. H., et al.. (1987). The insertion and extrusion of heterosulfur bridges. XIV. Synthesis of nitrotriphenyleno[1,12‐bcd]thiophenes. Journal of Heterocyclic Chemistry. 24(6). 1749–1755. 16 indexed citations
3.
Klemm, L. H., et al.. (1987). The insertion and extrusion of heterosulfur bridges. XIII. Syntheses and structural studies of nitrophenanthro[4,5‐bcd]thiophenes. Journal of Heterocyclic Chemistry. 24(2). 357–360. 5 indexed citations
4.
Keana, John F. W., et al.. (1986). 9,10-Disubstituted-2-anthracenyl tert-butyl nitroxides. ESR spectroscopic indicators for singlet oxygen. The Journal of Organic Chemistry. 51(18). 3456–3462. 9 indexed citations
5.
Koenig, Thomas, et al.. (1986). Generation and characterization of 2,6-azulylene. Journal of the American Chemical Society. 108(16). 5024–5025. 13 indexed citations
6.
Keana, John F. W., et al.. (1985). 2-(9,10-Dimethoxyanthracenyl)-tert-butylnitroxide. An ESR spectroscopic indicator for singlet oxygen. Journal of the American Chemical Society. 107(17). 5020–5021. 5 indexed citations
7.
Klopfenstein, Charles E., et al.. (1985). Flash vacuum pyrolysis of organomanganese pentacarbonyl compounds. Journal of the American Chemical Society. 107(18). 5276–5277. 8 indexed citations
8.
Koenig, Thomas, et al.. (1983). Non-Koopmans' theorem effects in the helium(I) photoelectron spectra of polyenes. Journal of the American Chemical Society. 105(8). 2256–2259. 16 indexed citations
9.
Koenig, Thomas, et al.. (1974). Electronic configurations of amido radicals. Journal of the American Chemical Society. 96(14). 4573–4577. 21 indexed citations
10.
Klemm, L. H., et al.. (1974). Chemistry of thienopyridines. XVII. Direct halogenation of thieno[2,3‐b]pyridine. Journal of Heterocyclic Chemistry. 11(2). 205–209. 16 indexed citations
11.
Klopfenstein, Charles E.. (1972). Laboratory Automation via Hierarchical Computers. Journal of Chromatographic Science. 10(1). 22–26. 5 indexed citations
12.
Klemm, L. H., et al.. (1971). Condensed thiophenes from sulfur bridging. II. Catalyzed reaction of azabiaryls with hydrogen sulfide. Journal of Heterocyclic Chemistry. 8(3). 383–389. 21 indexed citations
13.
Klemm, L. H., Charles E. Klopfenstein, & J. Shabtai. (1970). Alumina-catalyzed reactions of hydroxyarenes and hydroaromatic ketones. IV. Products and mechanism of reaction of 2-naphthol with methanol. The Journal of Organic Chemistry. 35(4). 1069–1075. 22 indexed citations
14.
Klemm, L. H., Charles E. Klopfenstein, & Reinhard Zell. (1970). 2‐Acetylbenzo[f]quinoline by direct synthesis of a β‐acylpyridine structure. Journal of Heterocyclic Chemistry. 7(4). 951–953. 5 indexed citations
15.
Klemm, L. H., et al.. (1969). Chemistry of thienopyridines. III. Syntheses of the thieno[2,3-b]- and thieno[3,2-b]pyridine systems. Direct substitution into the former system. The Journal of Organic Chemistry. 34(2). 347–354. 63 indexed citations
16.
Mitchell, Reginald H., Charles E. Klopfenstein, & V. Boekelheide. (1969). Dianions of trans-15,16-dialkyldihydropyrenes. Paramagnetic ring current effects. Journal of the American Chemical Society. 91(17). 4931–4932. 30 indexed citations
17.
Kaplan, Fred, et al.. (1968). Geometry of myrtenal. Detailed analysis of the nuclear magnetic resonance spectrum of a bicyclo[3.1.1]hept-2-ene system. The Journal of Organic Chemistry. 33(5). 1728–1730. 18 indexed citations
18.
Klemm, L. H., et al.. (1966). Photodimerization of trans-3,4-Methylenedioxycinnamyl trans-3,4,5-Trimethoxycinnamate1a. The Journal of Organic Chemistry. 31(9). 3003–3006. 3 indexed citations
19.
Klemm, L. H., et al.. (1966). Intramolecular Diels—Alder Reactions. III. Cyclizations of trans-Cinnamyl and Phenylpropargyl Phenylpropiolates1a. The Journal of Organic Chemistry. 31(7). 2376–2380. 23 indexed citations
20.
Klemm, L. H., et al.. (1964). Nitration and Acetylation of 9-Alkylfluorenes1. The Journal of Organic Chemistry. 29(7). 1960–1964. 5 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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