Alexander Wittkopp

1.4k total citations
14 papers, 1.2k citations indexed

About

Alexander Wittkopp is a scholar working on Organic Chemistry, Spectroscopy and Physical and Theoretical Chemistry. According to data from OpenAlex, Alexander Wittkopp has authored 14 papers receiving a total of 1.2k indexed citations (citations by other indexed papers that have themselves been cited), including 13 papers in Organic Chemistry, 6 papers in Spectroscopy and 3 papers in Physical and Theoretical Chemistry. Recurrent topics in Alexander Wittkopp's work include Synthesis and Properties of Aromatic Compounds (8 papers), Cyclization and Aryne Chemistry (5 papers) and Organic and Inorganic Chemical Reactions (3 papers). Alexander Wittkopp is often cited by papers focused on Synthesis and Properties of Aromatic Compounds (8 papers), Cyclization and Aryne Chemistry (5 papers) and Organic and Inorganic Chemical Reactions (3 papers). Alexander Wittkopp collaborates with scholars based in Germany, United States and United Kingdom. Alexander Wittkopp's co-authors include Peter R. Schreiner, Matthias Prall, Andrey A. Fokin, Dmitrii S. Yufit, Alexander F. Khlebnikov, R. R. Kostikov, Armin de Meijere, S.I. Kozhushkov, Sason Shaik and Wei Wu and has published in prestigious journals such as Angewandte Chemie International Edition, Physical Chemistry Chemical Physics and Chemistry - A European Journal.

In The Last Decade

Alexander Wittkopp

14 papers receiving 1.2k citations

Peers

Alexander Wittkopp
Matthias Gotta Germany
Thomas Laube Switzerland
Willi Sicking Germany
H. D. Verkruijsse Netherlands
José Kaneti Bulgaria
Ernst Schaumann Germany
Mareike C. Holland Germany
Robert Loos Germany
Massoud Arvanaghi United States
Hans Jörg Lindner Germany
Matthias Gotta Germany
Alexander Wittkopp
Citations per year, relative to Alexander Wittkopp Alexander Wittkopp (= 1×) peers Matthias Gotta

Countries citing papers authored by Alexander Wittkopp

Since Specialization
Citations

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

Fields of papers citing papers by Alexander Wittkopp

Since Specialization
Physical SciencesHealth SciencesLife SciencesSocial Sciences

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

Co-authorship network of co-authors of Alexander Wittkopp

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

All Works

14 of 14 papers shown
1.
Wittkopp, Alexander & Peter R. Schreiner. (2003). Metal‐Free, Noncovalent Catalysis of Diels–Alder Reactions by Neutral Hydrogen Bond Donors in Organic Solvents and in Water. Chemistry - A European Journal. 9(2). 407–414. 365 indexed citations
2.
Meijere, Armin de, Alexander F. Khlebnikov, S.I. Kozhushkov, et al.. (2002). The First Enantiomerically Pure [n]Triangulanes and Analogues: σ-[n]Helicenes with Remarkable Features. Chemistry - A European Journal. 8(4). 828–842. 45 indexed citations
3.
Schreiner, Peter R. & Alexander Wittkopp. (2002). H-Bonding Additives Act Like Lewis Acid Catalysts. Organic Letters. 4(2). 217–220. 413 indexed citations
4.
Schreiner, Peter R., et al.. (2001). The Rearrangement of the Cubane Radical Cation in Solution. Chemistry - A European Journal. 7(13). 2739–2744. 13 indexed citations
5.
Schreiner, Peter R., et al.. (2001). Selective Radical Reactions in Multiphase Systems: Phase-Transfer Halogenations of Alkanes. Chemistry - A European Journal. 7(23). 4996–5003. 42 indexed citations
6.
Prall, Matthias, Alexander Wittkopp, Andrey A. Fokin, & Peter R. Schreiner. (2001). Substituent effects on the Bergman cyclization of (Z)‐1,5‐hexadiyne‐3‐enes: a systematic computational study. Journal of Computational Chemistry. 22(13). 1605–1614. 57 indexed citations
7.
Prall, Matthias, Alexander Wittkopp, Andrey A. Fokin, & Peter R. Schreiner. (2001). Substituent effects on the Bergman cyclization of (Z)‐1,5‐hexadiyne‐3‐enes: a systematic computational study. Journal of Computational Chemistry. 22(13). 1605–1614. 1 indexed citations
8.
Prall, Matthias, Alexander Wittkopp, & Peter R. Schreiner. (2001). Can Fulvenes Form from Enediynes? A Systematic High-Level Computational Study on Parent and Benzannelated Enediyne and Enyne−Allene Cyclizations. The Journal of Physical Chemistry A. 105(40). 9265–9274. 109 indexed citations
9.
Galbraith, John Morrison, Peter R. Schreiner, Nathan Harris, et al.. (2000). A Valence Bond Study of the Bergman Cyclization: Geometric Features, Resonance Energy, and Nucleus-Independent Chemical Shift (NICS) Values. Chemistry - A European Journal. 6(8). 1446–1454. 54 indexed citations
10.
Wittkopp, Alexander, Matthias Prall, Peter R. Schreiner, & Henry F. Schaefer. (2000). Is SH4, the simplest 10-S-4 sulfurane, observable?. Physical Chemistry Chemical Physics. 2(10). 2239–2244. 6 indexed citations
11.
Galbraith, John Morrison, Peter R. Schreiner, Nathan Harris, et al.. (2000). A Valence Bond Study of the Bergman Cyclization: Geometric Features, Resonance Energy, and Nucleus-Independent Chemical Shift (NICS) Values. Chemistry - A European Journal. 6(8). 1446–1454. 1 indexed citations
12.
Meijere, Armin de, Alexander F. Khlebnikov, R. R. Kostikov, et al.. (1999). The First Enantiomerically Pure Triangulane (M)-Trispiro[2.0.0.2.1.1]nonane Is a σ-[4]Helicene. Angewandte Chemie International Edition. 38(23). 3474–3477. 53 indexed citations
13.
Khlebnikov, Alexander F., et al.. (1999). Das erste enantiomerenreine Triangulan: (M)-Trispiro[2.0.0.2.1.1]nonan ist ein σ-[4]Helicen. Angewandte Chemie. 111(23). 3682–3685. 33 indexed citations
14.
Meijere, Armin de, Alexander F. Khlebnikov, R. R. Kostikov, et al.. (1999). The First Enantiomerically Pure Triangulane (M)-Trispiro[2.0.0.2.1.1]nonane Is a σ-[4]Helicene. Angewandte Chemie International Edition. 38(23). 3474–3477. 1 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.

Explore authors with similar magnitude of impact

Breakdown of academic impact, for papers by Matthias Gotta Breakdown of academic impact, for papers by Thomas Laube Breakdown of academic impact, for papers by Willi Sicking Breakdown of academic impact, for papers by H. D. Verkruijsse Breakdown of academic impact, for papers by José Kaneti Breakdown of academic impact, for papers by Ernst Schaumann Breakdown of academic impact, for papers by Mareike C. Holland Breakdown of academic impact, for papers by Robert Loos Breakdown of academic impact, for papers by Massoud Arvanaghi Breakdown of academic impact, for papers by Hans Jörg Lindner
Rankless by CCL
2026