Howard E. Zimmerman

9.4k total citations · 2 hit papers
266 papers, 7.1k citations indexed

About

Howard E. Zimmerman is a scholar working on Organic Chemistry, Physical and Theoretical Chemistry and Environmental Chemistry. According to data from OpenAlex, Howard E. Zimmerman has authored 266 papers receiving a total of 7.1k indexed citations (citations by other indexed papers that have themselves been cited), including 189 papers in Organic Chemistry, 146 papers in Physical and Theoretical Chemistry and 46 papers in Environmental Chemistry. Recurrent topics in Howard E. Zimmerman's work include Radical Photochemical Reactions (103 papers), Photochemistry and Electron Transfer Studies (84 papers) and Various Chemistry Research Topics (82 papers). Howard E. Zimmerman is often cited by papers focused on Radical Photochemical Reactions (103 papers), Photochemistry and Electron Transfer Studies (84 papers) and Various Chemistry Research Topics (82 papers). Howard E. Zimmerman collaborates with scholars based in United States and Spain. Howard E. Zimmerman's co-authors include Gary L. Grunewald, Patrick S. Mariano, Diego Armesto, Vernon R. Sandel, Stephen S. Hixson, Richard S. Givens, David I. Schuster, Evgueni E. Nesterov, B. S. Thyagarajan and Roger W. Binkley and has published in prestigious journals such as Science, Chemical Reviews and Proceedings of the National Academy of Sciences.

In The Last Decade

Howard E. Zimmerman

264 papers receiving 6.7k 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.

The Stereochemistry of the Ivanov and Reformatsky Reactions. I

1957 594 citations Howard E. Zimmerman et al. Journal of the American Chemical Society profile →
Moebius-Hueckel concept in organic chemistry. Application of organic molecules and reactions

1971 396 citations Howard E. Zimmerman profile →

Peers — A (Enhanced Table)

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

Name	h						Papers	Cites
Howard E. Zimmerman United States	38	5.5k	2.1k	1.2k	754	706	266	7.1k
W. von E. Doering United States	46	5.7k 1.0×	1.4k 0.7×	672 0.6×	921 1.2×	852 1.2×	144	7.5k
Robert A. Moss United States	39	5.5k 1.0×	2.3k 1.1×	604 0.5×	949 1.3×	955 1.4×	423	7.5k
Jerome A. Berson United States	33	3.7k 0.7×	1.4k 0.7×	553 0.5×	482 0.6×	772 1.1×	265	5.2k
Philip E. Eaton United States	43	4.3k 0.8×	1.0k 0.5×	1.4k 1.2×	696 0.9×	562 0.8×	135	6.2k
S. Winstein United States	46	6.7k 1.2×	2.4k 1.1×	624 0.5×	1.3k 1.7×	2.0k 2.8×	281	8.6k
D. Griller Canada	40	4.8k 0.9×	1.6k 0.8×	752 0.6×	477 0.6×	364 0.5×	184	6.5k
Curt Wentrup Australia	45	7.0k 1.3×	3.2k 1.5×	606 0.5×	745 1.0×	816 1.2×	448	8.9k
Paul G. Gassman United States	44	5.6k 1.0×	1.2k 0.6×	1.2k 1.0×	1.4k 1.9×	856 1.2×	328	7.8k
Erwin Buncel Canada	47	5.7k 1.0×	2.1k 1.0×	2.0k 1.7×	1.7k 2.3×	2.2k 3.2×	373	8.8k
Zvi Rappoport Israel	37	5.3k 1.0×	1.3k 0.6×	532 0.5×	810 1.1×	1.2k 1.7×	321	6.7k

Countries citing papers authored by Howard E. Zimmerman

Since Specialization

Citations

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

Fields of papers citing papers by Howard E. Zimmerman

Since Specialization

Physical SciencesHealth SciencesLife SciencesSocial Sciences

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

Co-authorship network of co-authors of Howard E. Zimmerman

This figure shows the co-authorship network connecting the top 25 collaborators of Howard E. Zimmerman. A scholar is included among the top collaborators of Howard E. Zimmerman 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 Howard E. Zimmerman. Howard E. Zimmerman 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

Zimmerman, Howard E. & Frank Weinhold. (2012). Natural Bond–Bond Polarizability: A Hückel-Like Electronic Delocalization Index. The Journal of Organic Chemistry. 78(5). 1844–1850. 8 indexed citations

Guzei, Ilia A., Annamalai Senthilvelan, & Howard E. Zimmerman. (2009). 2-Methoxy-3,4-diphenylphenol. Acta Crystallographica Section E Structure Reports Online. 66(1). o72–o72. 2 indexed citations

Zimmerman, Howard E., et al.. (2007). Organic Photochemical Rearrangements of Triplets and Zwitterions; Mechanistic and Exploratory Organic Photochemistry. European Journal of Organic Chemistry. 2007(24). 4091–4102. 16 indexed citations

Zimmerman, Howard E. & Oleg D. Mitkin. (2007). The Aza-Type-B Photochemical Rearrangement: The Role of a Second Carbonyl in Heterocyclic Photochemistry. Mechanistic and Exploratory Organic Photochemistry¹^,². The Journal of Organic Chemistry. 72(16). 6091–6096. 7 indexed citations

Zimmerman, Howard E. & Alexei Pushechnikov. (2006). The Stereochemistry of Allenic Enol Tautomerism – Independent Generation and Reactivity of the Enolates. European Journal of Organic Chemistry. 2006(15). 3491–3497. 25 indexed citations

Zimmerman, Howard E.. (2006). Five decades of mechanistic and exploratory organic photochemistry. Pure and Applied Chemistry. 78(12). 2193–2203. 26 indexed citations

Zimmerman, Howard E. & Evgueni E. Nesterov. (2002). Quantitative Cavities and Reactivity in Stages of Crystal Lattices: Mechanistic and Exploratory Organic Photochemistry¹^,². Journal of the American Chemical Society. 124(11). 2818–2830. 25 indexed citations

Zimmerman, Howard E., et al.. (1998). Ab Initio Computations of Reacting Species in Crystal Lattices; Mechanistic and Exploratory Organic Photochemistry¹^,². Journal of the American Chemical Society. 120(33). 8549–8550. 14 indexed citations

Zimmerman, Howard E. & Charles Wright. (1992). A new photochemical reaction and its mechanism: rearrangement of acyl and imino cyclopropenes. Journal of the American Chemical Society. 114(1). 363–365. 9 indexed citations

10.

Zimmerman, Howard E., et al.. (1985). Mechanistic and exploratory organic photochemical series. 142. Dynamic isotopic dilution as a general method for ascertaining partition of photochemical pathways potentially utilizing nondiscernible intermediates: application to a new reaction. Journal of the American Chemical Society. 107(4). 1073–1075. 2 indexed citations

11.

Zimmerman, Howard E., et al.. (1982). Photochemical studies of cyclopropenes and cyclopentadienes. Mechanistic and exploratory organic photochemistry.. The Journal of Organic Chemistry. 47(11). 2060–2075. 12 indexed citations

12.

Zimmerman, Howard E., et al.. (1982). Evaluation of single-photon-counting measurements of excited-state lifetimes. Proceedings of the National Academy of Sciences. 79(6). 2128–2132. 23 indexed citations

13.

Zimmerman, Howard E., et al.. (1978). Stereochemistry in the di-.pi.-methane rearrangement: aryl migration. Exploratory and mechanistic organic photochemistry. Journal of the American Chemical Society. 100(1). 323–324. 1 indexed citations

14.

Zimmerman, Howard E., et al.. (1977). ChemInform Abstract: MECHANISTIC AND EXPLORATORY ORGANIC PHOTOCHEMISTRY. 104. THE PHOTOCHEMISTRY OF VINYLCYCLOPROPENES, A NEW AND GENERAL CYCLOPENTADIENE SYNTHESIS. EXPLORATORY AND MECHANISTIC ORGANIC PHOTOCHEMISTRY. Chemischer Informationsdienst. 8(24). 2 indexed citations

15.

Zimmerman, Howard E. & Gary A. Epling. (1972). Dependence of sigmatropic mechanisms on excited state multiplicity. Mechanistic and exploratory organic photochemistry. LXVII. Journal of the American Chemical Society. 94(10). 3647–3649. 5 indexed citations

16.

Zimmerman, Howard E., et al.. (1968). Mechanistic organic photochemistry. XXXI. Electronic details of the photochemical phenyl migration in 4,4-diphenylcyclohexenone. Journal of the American Chemical Society. 90(14). 3749–3760. 28 indexed citations

17.

Zimmerman, Howard E. & David S. Crumrine. (1968). Organic photochemistry. XXXVI. Photochemistry without light and the stereochemistry of the type A dienone rearrangement. Journal of the American Chemical Society. 90(20). 5612–5614. 22 indexed citations

18.

Zimmerman, Howard E.. (1966). On Molecular Orbital Correlation Diagrams, the Occurrence of Möbius Systems in Cyclization Reactions, and Factors Controlling Ground- and Excited-State Reactions. I. Journal of the American Chemical Society. 88(7). 1564–1565. 231 indexed citations

19.

Zimmerman, Howard E., et al.. (1963). Mechanistic Organic Photochemistry. III. Excited State Solvolyses. Journal of the American Chemical Society. 85(7). 922–927. 95 indexed citations

20.

Zimmerman, Howard E. & Vernon R. Sandel. (1963). Mechanistic Organic Photochemistry. II.^1,2 Solvolytic Photochemical Reactions. Journal of the American Chemical Society. 85(7). 915–922. 171 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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