Helmut G. Alt

8.7k citations

341 papers · 7.2k indexed · 1 hit paper · h-index 38

Organic Chemistry top 0.1%
Inorganic Chemistry top 0.2%
Process Chemistry and Technology top 0.1%
Materials Chemistry top 10%
Oncology top 10%

Co-authors: Alexander Köppl Marvin D. Rausch Wolfgang Milius Max Herberhold Ulf Thewalt Lawrence B. Kool Edmond Samuel M. Jung
Topics: Organometallic Complex Synthesis and Catalysis (256 papers)Synthesis and characterization of novel inorganic/organometallic compounds (100 papers)Synthetic Organic Chemistry Methods (91 papers)
Cited by: Process Chemistry and Technology Inorganic Chemistry Organic Chemistry
Journals: Chemical Reviews Journal of the American Chemical Society Chemical Society Reviews
Partner nations: Germany United States Brazil

In The Last Decade

Helmut G. Alt

336 papers receiving 6.8k citations

Hit Papers

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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.

Effect of the Nature of Metallocene Complexes of Group IV Metals on Their Performance in Catalytic Ethylene and Propylene Polymerization

2000 916 citations Helmut G. Alt et al. profile →

Peers

Countries citing papers authored by Helmut G. Alt

Since Specialization

Citations

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

Fields of papers citing papers by Helmut G. Alt

Since Specialization

Physical SciencesHealth SciencesLife SciencesSocial Sciences

This network shows the impact of papers produced by Helmut G. Alt. 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 Helmut G. Alt. The network helps show where Helmut G. Alt may publish in the future.

Co-authorship network of co-authors of Helmut G. Alt

This figure shows the co-authorship network connecting the top 25 collaborators of Helmut G. Alt. A scholar is included among the top collaborators of Helmut G. Alt 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 Helmut G. Alt. Helmut G. Alt 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

#	Work	Indexed citations
1	Halogen substituted iron(III) di(imino)pyridine complexes as catalysts for 1- pentene/1-hexene co-oligomerization reactions 2020 ·SHILAP Revista de lepidopterología ·(unknown),Helmut G. Alt	4
2	Homogeneous and heterogeneous oligomerization reactions of olefins with unbridged metallocene catalysts 2019 ·SHILAP Revista de lepidopterología ·(unknown),Helmut G. Alt	6
3	Intelligent catalysts for ethylene oligomerization and polymerization 2015 ·SHILAP Revista de lepidopterología ·Helmut G. Alt	5
4	Dissymmetric dinuclear transition metal complexes as dual site catalysts for the polymerization of ethylene 2014 ·SHILAP Revista de lepidopterología ·(unknown),Helmut G. Alt	3
5	Influence of triphenylphosphine on the activity of heterogeneous iridium, rhodium and platinum containing catalysts for the dehydrogenation of saturated hydrocarbons 2008 ·Journal of Organometallic Chemistry ·(unknown),Helmut G. Alt	6
6	Self-immobilizing catalysts and cocatalysts for olefin polymerization 2005 ·Dalton Transactions ·Helmut G. Alt	45
7	Dinuclear ansa zirconocene complexes containing a sandwich and a half-sandwich moiety as catalysts for the polymerization of ethylene 2002 ·Journal of Organometallic Chemistry ·Helmut G. Alt,(unknown),(unknown)	40
8	From the lab bench to the plant: how to commercialize a metallocene catalyst? 2001 ·Macromolecular Symposia ·Helmut G. Alt	17
9	Synthesis and characterization of unbridged metallocene dichloride complexes with two differently mono-substituted indenyl ligands and their application as catalysts for the polymerization of ethene and propene 2001 ·Journal of Molecular Catalysis A Chemical ·Roland Schmidt,(unknown),Helmut G. Alt	14
10	Fluorenyl complexes of zirconium and hafnium as catalysts for olefin polymerization 1998 ·Chemical Society Reviews ·Helmut G. Alt,Edmond Samuel	117
11	C1-verbrückte Fluorenyliden–Indenylidenkomplexe des Typs (C13H8–CR2–C9H6−nR′n)ZrCl2 (n=0, 1; R=Me, Ph, Butenyl; R′=Alkyl, Alkenyl) als Metallocenkatalysatorvorstufen für die Ethylenpolymerisation 1998 ·Journal of Organometallic Chemistry ·Helmut G. Alt,M. Jung,Gerald Kehr	38
12	Die Stellung des Zentralkomitees der SED im politischen System der DDR 1987 ·Helmut G. Alt	1
13	Reaktionen der substituierten metallacyclischen Alkenylketon-Komplexe Cp(CO)2M[R1CCR2C(O)Me] (M = Cr, Mo, W; Cp = η5-C5Me5; R1, R2 = H, Me,Ph) mit Stickstoffmonoxid und Nitrosylchlorid 1987 ·Journal of Organometallic Chemistry ·Helmut G. Alt,(unknown),Max Herberhold,(unknown)	4
14	Structural and spectroscopic comparison of the complexes Cp2M(PMe3)(CO) (M = Ti, Zr, Hf), (C9H7)2Ti(PMe3)(CO) and Cp2TiCl(PMe3); X-ray structures of Cp2Ti(PMe3)(CO) and Cp2TiCl(PMe3) 1985 ·Journal of Organometallic Chemistry ·Lawrence B. Kool,Marvin D. Rausch,Helmut G. Alt,Max Herberhold,(unknown),Ulf Thewalt	33
15	Photochemie von Alkyl‐Übergangsmetallkomplexen 1984 ·Angewandte Chemie ·Helmut G. Alt	15
16	Photochemistry of Alkyltransition‐Metal Complexes 1984 ·Angewandte Chemie International Edition in English ·Helmut G. Alt	28
17	Erzeugung und Stabilisierung von Phosphanyl- und Arsanyl - ketenen in der Koordinationssph�re von Wolfram 1983 ·Angewandte Chemie International Edition ·(unknown),(unknown),Werner Sieber,Helmut G. Alt	5
18	Thermische und Photo-induzierte Substitutionsreaktionen an der Eisen-ethyl-Verbindung CpFe(CO)₂Et. Die Molekülstruktur von CpFe(PMe₃)₂COEt (Cp =η⁵-C₅H₅)/ Thermal and Photo-Induced Substitution Reactions of the Iron Ethyl Compound CpFe(CO)₂Et. The Molecular Structure of CpFe(PMe₃)₂COEt (Cp = η⁵-C₅H₅) 1982 ·Zeitschrift für Naturforschung B ·Helmut G. Alt,Manfred Erwin Eichner,(unknown),U. Thewalt	14
19	Neue Wolfram‐Alkyl‐ und ‐Acylkomplexe mit Acetylen als Vierelektronenligand 1982 ·Angewandte Chemie ·Helmut G. Alt,Manfred Erwin Eichner,(unknown)	18
20	The Photochemically-Induced Degradation of (η⁵-C₅H₅)M(CO)₃CH₃ Complexes (M = Cr, Mo, W) 1977 ·Zeitschrift für Naturforschung B ·Marvin D. Rausch,(unknown),Helmut G. Alt,(unknown)	21

About Helmut G. Alt

Helmut G. Alt is a scholar working on Process Chemistry and Technology, Inorganic Chemistry and Organic Chemistry, having authored 341 papers that have together received 7.2k indexed citations. Recurring topics across this work include Organometallic Complex Synthesis and Catalysis (256 papers), Synthesis and characterization of novel inorganic/organometallic compounds (100 papers) and Synthetic Organic Chemistry Methods (91 papers). The work is most often cited by research in Process Chemistry and Technology (1.6k citations), Inorganic Chemistry (3.1k citations) and Organic Chemistry (6.2k citations). Helmut G. Alt has collaborated with scholars based in Germany, United States and Brazil. Frequent co-authors include Alexander Köppl, Marvin D. Rausch, Wolfgang Milius, Max Herberhold, Ulf Thewalt, Lawrence B. Kool, Edmond Samuel, M. Jung, Alexander C. Filippou and Manfred Erwin Eichner. Their work appears in journals such as Chemical Reviews, Journal of the American Chemical Society and Chemical Society Reviews.

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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