Stefan Sieber

3.5k total citations · 2 hit papers
18 papers, 3.1k citations indexed

About

Stefan Sieber is a scholar working on Atomic and Molecular Physics, and Optics, Organic Chemistry and Physical and Theoretical Chemistry. According to data from OpenAlex, Stefan Sieber has authored 18 papers receiving a total of 3.1k indexed citations (citations by other indexed papers that have themselves been cited), including 9 papers in Atomic and Molecular Physics, and Optics, 8 papers in Organic Chemistry and 7 papers in Physical and Theoretical Chemistry. Recurrent topics in Stefan Sieber's work include Advanced Chemical Physics Studies (9 papers), Chemical Reaction Mechanisms (5 papers) and Molecular spectroscopy and chirality (5 papers). Stefan Sieber is often cited by papers focused on Advanced Chemical Physics Studies (9 papers), Chemical Reaction Mechanisms (5 papers) and Molecular spectroscopy and chirality (5 papers). Stefan Sieber collaborates with scholars based in Germany, United States and Croatia. Stefan Sieber's co-authors include Keiji Morokuma, Stéphane Humbel, Toshiaki Matsubara, Mats Svensson, Robert D. J. Froese, Paul v. R. Schleyer, Paul von Ragué Schleyer, Peter Buzek, Juergen Gauss and José Walkimar de M. Carneiro and has published in prestigious journals such as Journal of the American Chemical Society, The Journal of Chemical Physics and The Journal of Physical Chemistry.

In The Last Decade

Stefan Sieber

18 papers receiving 3.0k 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.

ONIOM: A Multilayered Integrated MO + MM Method for Geometry Optimizations and Single Point Energy Predictions. A Test for Diels−Alder Reactions and Pt(P(t-Bu)₃)₂ + H₂ Oxidative Addition

1996 1.7k citations Mats Svensson, Stéphane Humbel et al. The Journal of Physical Chemistry profile →
The IMOMO method: Integration of different levels of molecular orbital approximations for geometry optimization of large systems: Test for n-butane conformation and S N2 reaction: RCl+Cl−

1996 607 citations Stéphane Humbel, Stefan Sieber et al. The Journal of Chemical Physics profile →

Peers — A (Enhanced Table)

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

Name	h						Papers	Cites
Stefan Sieber Germany	14	1.1k	1.1k	754	718	625	18	3.1k
Murco N. Ringnalda United States	15	1.1k 1.0×	904 0.9×	517 0.7×	663 0.9×	549 0.9×	15	2.8k
Nathalie Godbout United States	14	1.0k 0.9×	1.0k 1.0×	1.2k 1.6×	491 0.7×	876 1.4×	14	3.5k
Juan Bertrán Spain	37	1.2k 1.1×	1.6k 1.5×	578 0.8×	1.1k 1.6×	437 0.7×	146	3.7k
Brent Besler United States	11	1.0k 0.9×	1.3k 1.2×	713 0.9×	1.4k 1.9×	359 0.6×	13	3.8k
Andréa Bottoni Italy	35	1.9k 1.8×	859 0.8×	801 1.1×	743 1.0×	593 0.9×	159	3.7k
Toshiaki Matsubara Japan	20	1.4k 1.3×	776 0.7×	679 0.9×	672 0.9×	896 1.4×	61	3.1k
Stéphane Humbel France	22	1.5k 1.4×	1.3k 1.2×	918 1.2×	825 1.1×	749 1.2×	77	4.0k
Juan-Luis Pascual-Ahuir Spain	19	1.0k 1.0×	1.2k 1.1×	519 0.7×	630 0.9×	233 0.4×	30	2.7k
Estanislao Silla Spain	33	1.4k 1.3×	1.5k 1.4×	833 1.1×	1.5k 2.0×	323 0.5×	109	4.2k
Rainer Glaser United States	31	1.8k 1.7×	644 0.6×	510 0.7×	476 0.7×	524 0.8×	201	3.3k

Countries citing papers authored by Stefan Sieber

Since Specialization

Citations

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

Fields of papers citing papers by Stefan Sieber

Since Specialization

Physical SciencesHealth SciencesLife SciencesSocial Sciences

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

Co-authorship network of co-authors of Stefan Sieber

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

All Works

Sort: Min cites: Since: Top N: Style:

18 of 18 papers shown

Humbel, Stéphane, Stefan Sieber, & Keiji Morokuma. (1996). The IMOMO method: Integration of different levels of molecular orbital approximations for geometry optimization of large systems: Test for n-butane conformation and S N2 reaction: RCl+Cl−. The Journal of Chemical Physics. 105(5). 1959–1967. 607 indexed citations breakdown →

Matsubara, Toshiaki, Stefan Sieber, & Keiji Morokuma. (1996). A test of the new ?integrated MO + MM? (IMOMM) method for the conformational energy of ethane andn-butane. International Journal of Quantum Chemistry. 60(6). 1101–1109. 158 indexed citations

Svensson, Mats, Stéphane Humbel, Robert D. J. Froese, et al.. (1996). ONIOM: A Multilayered Integrated MO + MM Method for Geometry Optimizations and Single Point Energy Predictions. A Test for Diels−Alder Reactions and Pt(P(t-Bu)₃)₂ + H₂ Oxidative Addition. The Journal of Physical Chemistry. 100(50). 19357–19363. 1701 indexed citations breakdown →

Musaev, Djamaladdin G., et al.. (1995). N2 Cleavage by Three-Coordinate Group 6 Complexes. W(III) Complexes Would Be Better Than Mo(III) Complexes. Journal of the American Chemical Society. 117(49). 12366–12367. 110 indexed citations

Sieber, Stefan, et al.. (1993). Die Struktur des 7‐Norbornyl‐Kations und seine Umlagerung in das 2‐Norbornyl‐Kation. Angewandte Chemie. 105(11). 1673–1675. 12 indexed citations

Sieber, Stefan, Paul von Ragué Schleyer, Hrvoj Vančik, Milan Mesić, & Dionis E. Sunko. (1993). Die Struktur des 7-Norbornyl-Kations und seine Umlagerung in das 2-Norbornyl-Kation. Angewandte Chemie. 105(11). 1673–1675. 1 indexed citations

Schleyer, Paul von Ragué & Stefan Sieber. (1993). Die exakte ab‐initio‐quantenchemische Beschreibung des klassischen 2‐Norbornyl‐Kations. Angewandte Chemie. 105(11). 1676–1677. 11 indexed citations

Schleyer, Paul von Ragué & Stefan Sieber. (1993). Die exakte ab-initio-quantenchemische Beschreibung des klassischen 2-Norbornyl-Kations**. Angewandte Chemie. 105(11). 1676–1677. 5 indexed citations

Sieber, Stefan, Paul v. R. Schleyer, & Juergen Gauss. (1993). The accurate C2v phenonium and benzenonium ion structures confirmed by correlated GIAO-MP2 NMR chemical shift calculations. Journal of the American Chemical Society. 115(15). 6987–6988. 90 indexed citations

10.

Sieber, Stefan, Peter Buzek, Paul v. R. Schleyer, Wolfram Koch, & José Walkimar de M. Carneiro. (1993). The tert-butyl cation (C4H9+) potential energy surface. Journal of the American Chemical Society. 115(1). 259–270. 105 indexed citations

11.

Sieber, Stefan, et al.. (1993). Structure, stabilization energies and chemical shifts of the cyclobutenyl cation. Does it have ‘aromatic’ homocyclopropenium ion character? An ab initio study. Journal of Physical Organic Chemistry. 6(8). 445–464. 25 indexed citations

12.

Schleyer, Paul von Ragué & Stefan Sieber. (1993). The Classical 2‐Norbornyl Cation Rigorously Defined Ab Initio. Angewandte Chemie International Edition in English. 32(11). 1606–1608. 47 indexed citations

13.

Sieber, Stefan, Paul von Ragué Schleyer, Hrvoj Vančik, Milan Mesić, & Dionis E. Sunko. (1993). The Nature of the 7‐Norbornyl Cation and its Rearrangement into the 2‐Norbornyl Cation. Angewandte Chemie International Edition in English. 32(11). 1604–1606. 34 indexed citations

14.

Buzek, Peter, Paul von Ragué Schleyer, & Stefan Sieber. (1992). Strukturen von Carbokationen. Chemie in unserer Zeit. 26(3). 116–128. 47 indexed citations

15.

Wiberg, Kenneth B., Christopher M. Hadad, Stefan Sieber, & Paul v. R. Schleyer. (1992). Structures and energies of ions derived from bicyclo[1.1.1]pentane. Journal of the American Chemical Society. 114(14). 5820–5828. 38 indexed citations

16.

Buzek, Peter, Paul von Ragué Schleyer, Stefan Sieber, et al.. (1991). Confirmation of the H-bridged structure of the 2-butyl cation by comparison of experimental and ab initio IR frequencies. Journal of the Chemical Society Chemical Communications. 671–674. 23 indexed citations

17.

Kaufmann, Elmar, Stefan Sieber, & Paul v. R. Schleyer. (1989). Ab initio models for metalation and hydrogenolysis reactions involving organolithium compounds. Journal of the American Chemical Society. 111(1). 121–125. 24 indexed citations

18.

Kaufmann, Elmar, Stefan Sieber, & Paul v. R. Schleyer. (1989). Carboxylation of lithium compounds: ab initio mechanisms. Journal of the American Chemical Society. 111(11). 4005–4008. 28 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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