Rainer Ludwig Claisen

German chemist best known for his work with condensations of carbonyls and sigmatropic rearrangements (1851–1930)
Person human Q65135
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Rainer Ludwig Claisen

Summary

Rainer Ludwig Claisen is a human[1]. He was born in Cologne[2]. He was born on +1851-01-14T00:00:00Z[3]. He died in Bad Godesberg[4]. He died on +1930-01-05T00:00:00Z[5]. He worked as a chemist[6] and university teacher[7]. He ranks in the top 0.73% of human entities by monthly Wikipedia readership (15 views/month, #7,296 of 1,000,298).[8]

Key Facts

  • Born in Cologne[2], Rainer Ludwig Claisen…
  • Rainer Ludwig Claisen passed away in Bad Godesberg[4].
  • Rainer Ludwig Claisen was born on +1851-01-14T00:00:00Z[3].
  • Rainer Ludwig Claisen died on +1930-01-05T00:00:00Z[5].
  • Rainer Ludwig Claisen's mother was Emilia Claisen[9].
  • Rainer Ludwig Claisen held citizenship in Germany[10].
  • Rainer Ludwig Claisen's professions included chemist[6].
  • Rainer Ludwig Claisen worked as a university teacher[7].
  • Rainer Ludwig Claisen's field of work was organic chemistry[11].
  • Rainer Ludwig Claisen was employed by Kiel University[12].
  • Rainer Ludwig Claisen was employed by RWTH Aachen University[13].
  • Among Rainer Ludwig Claisen's employers was University of Bonn[14].
  • Rainer Ludwig Claisen was educated at University of Bonn[15].
  • Rainer Ludwig Claisen's doctoral advisor was August Kekulé[16].
  • Rainer Ludwig Claisen was a member of German Academy of Sciences Leopoldina[17].
  • Rainer Ludwig Claisen was a member of Bavarian Academy of Sciences and Humanities[18].
  • Rainer Ludwig Claisen was a member of Katholischer Studentenverein Arminia Bonn[19].
  • Rainer Ludwig Claisen's image is recorded as Ludwig Claisen 1897 Kiel.jpg[20].
  • Rainer Ludwig Claisen is recorded as male[21].
  • Rainer Ludwig Claisen's instance of is recorded as human[22].
  • Rainer Ludwig Claisen's ISNI is recorded as 0000000055348494[23].
  • Rainer Ludwig Claisen's VIAF cluster ID is recorded as 47515605[24].
  • Rainer Ludwig Claisen's GND ID is recorded as 116524995[25].
  • Rainer Ludwig Claisen's Commons category is recorded as Ludwig Claisen[26].
  • Rainer Ludwig Claisen's SBN author ID is recorded as UTOV535910[27].

Body

Origins and Family

Born in Cologne[2], Rainer Ludwig Claisen… he was born on +1851-01-14T00:00:00Z[3]. His mother was Emilia Claisen[9].

Education

Rainer Ludwig Claisen's education included a stint at University of Bonn[15]. His doctoral advisor was August Kekulé[16].

Career and Affiliations

Recorded occupations include chemist[6] and university teacher[7]. Rainer Ludwig Claisen's field of work was organic chemistry[11]. Employers include Kiel University[12], a public university[28], in Germany[29], founded in 1665[30], headquartered in Kiel[31]; RWTH Aachen University[13], a public university[32], in Germany[33], founded in 1870[34], headquartered in Aachen[35]; and University of Bonn[14], a public research university[36], in Germany[37], founded in 1818[38], headquartered in Bonn[39].

Death and Burial

Rainer Ludwig Claisen died on +1930-01-05T00:00:00Z[5]. He passed away in Bad Godesberg[4].

Works and Contributions

Things named for Rainer Ludwig Claisen include Claisen condensation[40], an eponymous chemical reaction[41]; Claisen rearrangement[42], an eponymous chemical reaction[43]; Tishchenko reaction[44], an eponymous chemical reaction[45]; Claisen-Schmidt condensation[46], an eponymous chemical reaction[47]; and Ireland–Claisen rearrangement[48], a type of chemical reaction[49].

Why It Matters

Rainer Ludwig Claisen ranks in the top 0.73% of human entities by monthly Wikipedia readership (15 views/month, #7,296 of 1,000,298).[8] He has Wikipedia articles in 10 language editions, a strong signal of global cultural recognition.[50] He is known by 7 alternative names across languages and contexts.[51]

Entities named for him include Claisen condensation[40], an eponymous chemical reaction[41]; Claisen rearrangement[42], an eponymous chemical reaction[43]; Tishchenko reaction[44], an eponymous chemical reaction[45]; Claisen-Schmidt condensation[46], an eponymous chemical reaction[47]; and Ireland–Claisen rearrangement[48], a type of chemical reaction[49].

FAQs

Where was Rainer Ludwig Claisen born?

Rainer Ludwig Claisen was born in Cologne[2].

Where did Rainer Ludwig Claisen die?

Rainer Ludwig Claisen died in Bad Godesberg[4].

Who were Rainer Ludwig Claisen's parents?

Rainer Ludwig Claisen's mother was Emilia Claisen[9].

What did Rainer Ludwig Claisen do for work?

Rainer Ludwig Claisen worked as chemist[6] and university teacher[7].

Where did Rainer Ludwig Claisen go to school?

Rainer Ludwig Claisen was educated at University of Bonn[15].

References

Programmatic citations — every numbered marker resolves to a verifiable graph row below.

Direct Wikidata claims

  1. [20] . wikidata.org.
  2. [2] . wikidata.org.
  3. [4] . Great Soviet Encyclopedia (1969–1978). Retrieved . wikidata.org.
  4. [21] . Integrated Authority File. Retrieved . wikidata.org.
  5. [9] . wikidata.org.
  6. [10] . wikidata.org.
  7. [22] . wikidata.org.
  8. [15] . wikidata.org.
  9. [11] . wikidata.org.
  10. [6] . wikidata.org.
  11. [7] . wikidata.org.
  12. [12] . wikidata.org.
  13. [13] . wikidata.org.
  14. [14] . Retrieved . wikidata.org.
  15. [16] . wikidata.org.
  16. [23] . International Standard Name Identifier. wikidata.org.
  17. [24] . wikidata.org.
  18. [25] . wikidata.org.
  19. [26] . wikidata.org.
  20. [27] . wikidata.org.
  21. [17] . wikidata.org.
  22. [18] . wikidata.org.
  23. [19] . wikidata.org.
  24. [3] . Integrated Authority File. Retrieved . wikidata.org.
  25. [5] . Integrated Authority File. Retrieved . wikidata.org.

Inverse relationships (entities pointing at this one)

  1. [40] . wikidata.org. → on this site
  2. [42] . wikidata.org. → on this site
  3. [44] . wikidata.org. → on this site
  4. [46] . wikidata.org. → on this site
  5. [48] . wikidata.org. → on this site

Inline context (facts about related entities)

  1. [28] . Wikidata. wikidata.org. → on this site
  2. [29] . Wikidata. wikidata.org. → on this site
  3. [30] . Wikidata. wikidata.org. → on this site
  4. [31] . Wikidata. wikidata.org. → on this site
  5. [32] . Wikidata. wikidata.org. → on this site
  6. [33] . Wikidata. wikidata.org. → on this site
  7. [34] . Wikidata. wikidata.org. → on this site
  8. [35] . Wikidata. wikidata.org. → on this site
  9. [36] . Wikidata. wikidata.org. → on this site
  10. [37] . Wikidata. wikidata.org. → on this site
  11. [38] . Wikidata. wikidata.org. → on this site
  12. [39] . Wikidata. wikidata.org. → on this site
  13. [41] . Wikidata. wikidata.org. → on this site
  14. [43] . Wikidata. wikidata.org. → on this site
  15. [45] . Wikidata. wikidata.org. → on this site
  16. [47] . Wikidata. wikidata.org. → on this site
  17. [49] . Wikidata. wikidata.org. → on this site

Class ancestry

  1. [1] . Wikidata. wikidata.org.

Aggregate / graph-position facts

  1. [8] . Wikimedia Foundation. dumps.wikimedia.org.
  2. [50] . Wikidata sitelinks. wikidata.org.
  3. [51] . Wikidata aliases. wikidata.org.

📑 Cite this page

Use these citations when quoting this entity in research, articles, AI prompts, or wherever provenance matters. We aggregate Wikidata + Wikipedia + authoritative open-data sources; the stitched, scored, cross-referenced view is what 4ort.xyz contributes.

APA 4ort.xyz Knowledge Graph. (2026). Rainer Ludwig Claisen. Retrieved April 10, 2026, from https://4ort.xyz/entity/rainer-ludwig-claisen
MLA “Rainer Ludwig Claisen.” 4ort.xyz Knowledge Graph, 4ort.xyz, 10 Apr. 2026, https://4ort.xyz/entity/rainer-ludwig-claisen.
BibTeX @misc{4ortxyz_rainer-ludwig-claisen_2026, author = {{4ort.xyz Knowledge Graph}}, title = {{Rainer Ludwig Claisen}}, year = {2026}, url = {https://4ort.xyz/entity/rainer-ludwig-claisen}, note = {Accessed: 2026-04-10}}
LLM prompt According to 4ort.xyz Knowledge Graph (aggregator of Wikidata, Wikipedia, and authoritative open-data sources): Rainer Ludwig Claisen — https://4ort.xyz/entity/rainer-ludwig-claisen (retrieved 2026-04-10)

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