George K. Helmkamp

1.7k total citations
51 papers, 1.3k citations indexed

About

George K. Helmkamp is a scholar working on Organic Chemistry, Spectroscopy and Molecular Biology. According to data from OpenAlex, George K. Helmkamp has authored 51 papers receiving a total of 1.3k indexed citations (citations by other indexed papers that have themselves been cited), including 29 papers in Organic Chemistry, 13 papers in Spectroscopy and 10 papers in Molecular Biology. Recurrent topics in George K. Helmkamp's work include DNA and Nucleic Acid Chemistry (9 papers), Organic Chemistry Cycloaddition Reactions (6 papers) and Molecular spectroscopy and chirality (6 papers). George K. Helmkamp is often cited by papers focused on DNA and Nucleic Acid Chemistry (9 papers), Organic Chemistry Cycloaddition Reactions (6 papers) and Molecular spectroscopy and chirality (6 papers). George K. Helmkamp collaborates with scholars based in United States and Poland. George K. Helmkamp's co-authors include Paul O. P. Ts’o, Christian Sander, Sunney I. Chan, Martin Schweizer, David J. Pettitt, Dennis C. Owsley, Naoshi Kondo, Ronald D. Clark, James Bonner and Bruce Rickborn and has published in prestigious journals such as Proceedings of the National Academy of Sciences, Journal of the American Chemical Society and PLANT PHYSIOLOGY.

In The Last Decade

George K. Helmkamp

51 papers receiving 1.1k citations

Peers — A (Enhanced Table)

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

Name h Career Trend Papers Cites
George K. Helmkamp United States 19 674 514 229 170 90 51 1.3k
H. Friebolin Germany 19 464 0.7× 725 1.4× 295 1.3× 112 0.7× 116 1.3× 78 1.2k
L. M. Jackman United Kingdom 24 276 0.4× 847 1.6× 321 1.4× 221 1.3× 172 1.9× 51 1.6k
P. C. Kvande 21 345 0.5× 545 1.1× 230 1.0× 149 0.9× 220 2.4× 82 1.4k
J. Schreiber Germany 25 869 1.3× 997 1.9× 152 0.7× 122 0.7× 229 2.5× 44 1.9k
C. Pascual Germany 17 278 0.4× 640 1.2× 238 1.0× 84 0.5× 103 1.1× 31 1.1k
William N. White United States 14 256 0.4× 548 1.1× 160 0.7× 133 0.8× 77 0.9× 32 856
Don K. Dalling United States 16 302 0.4× 684 1.3× 551 2.4× 132 0.8× 133 1.5× 23 1.3k
H. Fritzsche Germany 22 1.1k 1.6× 315 0.6× 290 1.3× 215 1.3× 164 1.8× 86 1.6k
Bruce R. Adams United States 19 585 0.9× 618 1.2× 261 1.1× 108 0.6× 152 1.7× 29 1.3k
Paul Haake United States 23 390 0.6× 1.1k 2.1× 231 1.0× 128 0.8× 135 1.5× 79 1.6k

Countries citing papers authored by George K. Helmkamp

Since Specialization
Citations

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

Fields of papers citing papers by George K. Helmkamp

Since Specialization
Physical SciencesHealth SciencesLife SciencesSocial Sciences

This network shows the impact of papers produced by George K. Helmkamp. 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 George K. Helmkamp. The network helps show where George K. Helmkamp may publish in the future.

Co-authorship network of co-authors of George K. Helmkamp

This figure shows the co-authorship network connecting the top 25 collaborators of George K. Helmkamp. A scholar is included among the top collaborators of George K. Helmkamp 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 George K. Helmkamp. George K. Helmkamp 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.
2.
Radlick, Phillip, et al.. (1978). Methano-bridged 10.pi.-electron aromatic annulenes. 4-Methoxy-1,6-methanoisoquinoline. The Journal of Organic Chemistry. 43(20). 3813–3816. 12 indexed citations
3.
Helmkamp, George K.. (1976). Sulfur Ylides. Emerging synthetic intermediates (Trost, Barry M.; Melvn, Lawrence S.). Journal of Chemical Education. 53(5). A275–A275. 1 indexed citations
4.
Helmkamp, George K., et al.. (1973). Synthesis and characterization of some eight- and ten-membered sulfur-containing heterocycles. The Journal of Organic Chemistry. 38(3). 461–464. 2 indexed citations
5.
Helmkamp, George K., et al.. (1971). Stacking interaction between different species. Biochimica et Biophysica Acta (BBA) - Nucleic Acids and Protein Synthesis. 232(2). 227–233. 6 indexed citations
6.
Helmkamp, George K., et al.. (1969). Synthesis of 2,5-dihydrothiophenonium 2,4,6-trinitrobenzenesulfonates from butadienes and methanesulfenyl 2,4,6-trinitrobenzenesulfonates. The Journal of Organic Chemistry. 34(9). 2763–2764. 3 indexed citations
7.
Helmkamp, George K., et al.. (1966). The Stereochemistry of Δ2-Thiazoline Formation from Episulfides. Journal of the American Chemical Society. 88(4). 768–770. 7 indexed citations
8.
Helmkamp, George K., et al.. (1965). Alkylation of Organic Disulfides1. The Journal of Organic Chemistry. 30(3). 933–935. 23 indexed citations
9.
Chan, Sunney I., Martin Schweizer, Paul O. P. Ts’o, & George K. Helmkamp. (1964). Interaction and Association of Bases and Nucleosides in Aqueous Solutions. III. A Nuclear Magnetic Resonance Study of the Self-Association of Purine and 6-Methylpurine1b. Journal of the American Chemical Society. 86(19). 4182–4188. 164 indexed citations
10.
Helmkamp, George K. & Paul O. P. Ts’o. (1962). Secondary structures of nucleic acids in organic solvents III. Relationship of optical properties to conformation. Biochimica et Biophysica Acta. 55(5). 601–608. 41 indexed citations
11.
Ts’o, Paul O. P. & George K. Helmkamp. (1961). Studies on the secondary structure of nucleic acids by means of optical rotation. Tetrahedron. 13(1-3). 198–207. 13 indexed citations
12.
Skell, P. S., et al.. (1960). Specific Rotations of Pure 2-Bromobutanes. Stereochemistry of the 2-Butanol to 2-Bromobutane Conversion. Journal of the American Chemical Society. 82(2). 410–414. 6 indexed citations
13.
Hansch, Corwin & George K. Helmkamp. (1959). Organic chemistry : an outline : problems and answers. McGraw-Hill eBooks. 1 indexed citations
14.
Helmkamp, George K., et al.. (1959). Optically Active Butane-2-d. III. Verification of Configuration by Elimination Reactions1. The Journal of Organic Chemistry. 24(4). 529–532. 2 indexed citations
15.
Helmkamp, George K., et al.. (1958). Stereochemistry of the lithium aluminum deuteride reduction of the thiirane ring. Tetrahedron. 2(3-4). 304–307. 14 indexed citations
16.
Helmkamp, George K., Forrest L. Carter, & H. J. Lucas. (1957). Coördination of Silver Ion with Unsaturated Compounds. VIII. Alkynes1. Journal of the American Chemical Society. 79(6). 1306–1310. 9 indexed citations
17.
Martín, J. P., George K. Helmkamp, & J. O. Ervin. (1956). Effect of Bromide from a Soil Fumigant and from CaBr2 on Growth and Chemical Composition of Citrus Plants. Soil Science Society of America Journal. 20(2). 209–212. 7 indexed citations
18.
Helmkamp, George K., et al.. (1954). Residue Analysis, Direct Potentiometric Method for Chloride Ion Applied to Residues of Chlorinated Insecticides. Journal of Agricultural and Food Chemistry. 2(16). 836–839. 12 indexed citations
19.
Helmkamp, George K. & James Bonner. (1953). Some Relationships of Sterols to Plant Growth. PLANT PHYSIOLOGY. 28(3). 428–436. 35 indexed citations
20.
Helmkamp, George K. & H. J. Lucas. (1952). Stereochemistry of the Reaction of 2,3-Epoxybutane with Alcohols. Journal of the American Chemical Society. 74(4). 951–954. 11 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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