Jack Halpern

12.9k total citations · 1 hit paper
223 papers, 9.6k citations indexed

About

Jack Halpern is a scholar working on Organic Chemistry, Inorganic Chemistry and Oncology. According to data from OpenAlex, Jack Halpern has authored 223 papers receiving a total of 9.6k indexed citations (citations by other indexed papers that have themselves been cited), including 93 papers in Organic Chemistry, 86 papers in Inorganic Chemistry and 38 papers in Oncology. Recurrent topics in Jack Halpern's work include Asymmetric Hydrogenation and Catalysis (51 papers), Metal complexes synthesis and properties (38 papers) and Inorganic and Organometallic Chemistry (32 papers). Jack Halpern is often cited by papers focused on Asymmetric Hydrogenation and Catalysis (51 papers), Metal complexes synthesis and properties (38 papers) and Inorganic and Organometallic Chemistry (32 papers). Jack Halpern collaborates with scholars based in United States, Canada and United Kingdom. Jack Halpern's co-authors include Clark R. Landis, A.S.C. Chan, J. J. Pluth, Brian R. James, L. Cassar, Philip E. Eaton, Ayusman Sen, Ray L. Sweany, Leslie E. Orgel and Michael T. Ashby and has published in prestigious journals such as Nature, Science and Proceedings of the National Academy of Sciences.

In The Last Decade

Jack Halpern

223 papers receiving 8.9k 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.

Mechanism and Stereoselectivity of Asymmetric Hydrogenation

1982 373 citations Jack Halpern profile →

Peers — A (Enhanced Table)

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

Name	h						Papers	Cites
Jack Halpern United States	50	5.5k	4.8k	1.8k	1.7k	1.2k	223	9.6k
Russell S. Drago United States	62	6.2k 1.1×	4.5k 0.9×	867 0.5×	5.2k 3.0×	863 0.7×	375	14.2k
Klaus Wurst Austria	48	6.3k 1.1×	2.9k 0.6×	1.5k 0.8×	3.3k 1.9×	463 0.4×	543	11.4k
Agustı́ Lledós Spain	55	8.7k 1.6×	5.5k 1.2×	1.1k 0.6×	1.7k 1.0×	545 0.5×	384	12.3k
Feliu Maseras Spain	64	11.4k 2.1×	5.6k 1.2×	1.4k 0.8×	2.3k 1.4×	640 0.6×	314	16.2k
Kenneth I. Hardcastle United States	55	5.1k 0.9×	3.9k 0.8×	855 0.5×	4.1k 2.4×	251 0.2×	229	10.0k
Ennio Zangrando Italy	60	6.7k 1.2×	8.3k 1.7×	2.2k 1.2×	4.4k 2.6×	521 0.5×	555	15.1k
Fred Basolo United States	52	5.7k 1.0×	3.9k 0.8×	1.0k 0.6×	3.0k 1.8×	297 0.3×	301	10.6k
Lucio Randaccio Italy	45	2.3k 0.4×	3.1k 0.7×	3.2k 1.8×	1.9k 1.1×	119 0.1×	266	7.4k
John H. Enemark United States	46	2.6k 0.5×	3.8k 0.8×	1.1k 0.6×	2.2k 1.3×	255 0.2×	256	9.6k
Joseph C. Calabrese United States	68	11.1k 2.0×	5.9k 1.2×	1.1k 0.6×	4.0k 2.3×	342 0.3×	258	16.0k

Countries citing papers authored by Jack Halpern

Since Specialization

Citations

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

Fields of papers citing papers by Jack Halpern

Since Specialization

Physical SciencesHealth SciencesLife SciencesSocial Sciences

This network shows the impact of papers produced by Jack Halpern. 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 Jack Halpern. The network helps show where Jack Halpern may publish in the future.

Co-authorship network of co-authors of Jack Halpern

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

Halpern, Jack. (2001). Organometallic chemistry at the threshold of a new millennium. Retrospect and prospect. Pure and Applied Chemistry. 73(2). 209–220. 33 indexed citations

Halpern, Jack, et al.. (1992). Thermolysis of Cp(CO)nM-CH(CH3)C6H5 (n =2, M Fe, Ru; n = 3, M Mo, W). Some vertical trends in transition metalalkyl bond dissociation energies. Journal of Organometallic Chemistry. 428(1-2). C8–C11. 20 indexed citations

Ashby, Michael T. & Jack Halpern. (1991). ChemInform Abstract: Kinetics and Mechanism of Catalysis of the Asymmetric Hydrogenation of α,β‐Unsaturated Carboxylic Acids (I) by Bis(carboxylato)(2, 2′‐bis(diphenylphosphino)‐1,1′‐binaphthyl)ruthenium(II), (Ru(II)(BINAP) (O2CR)2). ChemInform. 22(19). 1 indexed citations

Halpern, Jack. (1989). Mechanistic aspects of coenzyme B12-dependent rearrangements. Journal of Inorganic Biochemistry. 36(3-4). 192–192. 2 indexed citations

Linn, Donald E. & Jack Halpern. (1987). Catalysis of the hydrogenation of benzophenone by polyhydride complexes of tris(triphenylphosphine)ruthernium. Journal of Organometallic Chemistry. 330(1-2). 155–159. 12 indexed citations

Landis, Clark R. & Jack Halpern. (1987). Asymmetric hydrogenation of methyl (Z)-.alpha.-acetamidocinnamate catalyzed by [1,2-bis(phenyl-o-anisoyl)phosphino)ethane]rhodium(I): kinetics, mechanism and origin of enantioselection. Journal of the American Chemical Society. 109(6). 1746–1754. 435 indexed citations

Landis, Clark R. & Jack Halpern. (1987). Correction. Asymmetric Hydrogenation of Methyl-(Z)-α-acetamidocinnamate Catalyzed by {1,2-Bis(phenyl-o-anisoyl)phosphino)ethane}rhodium(I): Kinetics, Mechanism and Origin of Enantioselection. Journal of the American Chemical Society. 109(20). 6217–6217. 4 indexed citations

Halpern, Jack, et al.. (1985). Additions and Corrections - Cobalt-Carbon Bond Dissociation Energy of Coenzyme B ₁₂. Journal of the American Chemical Society. 107(7). 2199–2199. 13 indexed citations

Blaser, Hans‐Ulrich & Jack Halpern. (1980). Reactions of vitamin B12r with organic halides. Journal of the American Chemical Society. 102(5). 1684–1689. 42 indexed citations

10.

Halpern, Jack, Flora T. T. Ng, & Garry L. Rempel. (1979). Metal-alkyl bond dissociation energies in organocobalt compounds related to vitamin B12 coenzymes. Journal of the American Chemical Society. 101(23). 7124–7126. 54 indexed citations

11.

Halpern, Jack, et al.. (1972). Reactions of bis(dioximato)cobalt(II) complexes with organic halides. Influence of electronic and steric factors upon re-activity. Journal of the American Chemical Society. 94(6). 1881–1886. 39 indexed citations

12.

Halpern, Jack, et al.. (1972). Carbonylation of hydridopentacyanocobaltate(III). Journal of the American Chemical Society. 94(5). 1575–1577. 7 indexed citations

13.

Halpern, Jack & James E. Byrd. (1971). Kinetics of the reversible formation of alkoxycarbonylplatinum complexes through reactions of alcohols with trans-chlorocarbonylbis(triphenylphosphiine)platinum(II). Journal of the American Chemical Society. 93(7). 1634–1636. 34 indexed citations

14.

Halpern, Jack, et al.. (1970). Mechansim of the tris(triphenylphosphine)platinum(0)-catalyzed oxidation of triphenylphosphine. Inorganic Chemistry. 9(12). 2798–2800. 30 indexed citations

15.

Hague, David N. & Jack Halpern. (1967). Kinetics of substitution reactions of transbis(dimethylglyoximato)cobalt(III) complexes. Inorganic Chemistry. 6(11). 2059–2063. 42 indexed citations

16.

Halpern, Jack, et al.. (1966). Formation and Properties of Some Chlorocarbonyl Complexes of Ruthenium(II) and Ruthenium(III)¹. Journal of the American Chemical Society. 88(22). 5142–5147. 60 indexed citations

17.

Harrod, J. F., et al.. (1961). CATALYTIC ACTIVATION OF MOLECULAR HYDROGEN BY RUTHENIUM (III) CHLORIDE COMPLEXES. Canadian Journal of Chemistry. 39(6). 1372–1376. 39 indexed citations

18.

Chalk, A. J. & Jack Halpern. (1959). Medium Effects in the Homogeneous Catalytic Activation of Molecular Hydrogen by Metal Salts. II. Anion and Solvent Effects for Cupric and Cuprous Salts¹. Journal of the American Chemical Society. 81(22). 5852–5854. 12 indexed citations

19.

Webster, A. H. & Jack Halpern. (1957). Homogeneous Catalytic Activation of Molecular Hydrogen in Aqueous Solution by Silver Salts. II High Temperature Hydrogenation and Exchange Studies. The Journal of Physical Chemistry. 61(9). 1239–1245. 22 indexed citations

20.

Armstrong, Andrew, Jack Halpern, & W. C. E. Higginson. (1956). The Reaction between Mercury(I) and Thallium(III) in Aqueous Solution: Evidence for the Dismutation of Hg₂++. The Journal of Physical Chemistry. 60(12). 1661–1662. 7 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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