# Fame.am profile — machine-readable export
# Canonical URL: https://fame.am/person/william-klemperer
# Generated: 2026-08-13T09:42:38.960Z

schema: https://schema.org/Person
url: "https://fame.am/person/william-klemperer"
name: "William Klemperer"
slug: "william-klemperer"
description: "William Aloys Klemperer (October 6, 1927 – November 5, 2017) was an American chemist, chemical physicist and molecular spectroscopist. Klemperer is most widely known for introducing molecular beam methods into chemical physics research, greatly increasing the understanding of nonbonding interactions between atoms and molecules through development of the microwave spectroscopy of van der Waals molecules formed in supersonic expansions, pioneering astrochemistry, including developing the first gas phase chemical models of cold molecular clouds that predicted an abundance of the molecular HCO+ ion that was later confirmed by radio astronomy."
tagline: "American chemist (1927–2017)"
image: "https://commons.wikimedia.org/wiki/Special:FilePath/William_Klemperer_by_Stuart_Novick.jpg?width=1200"
gender: "male"
country:
  name: "United States"
  isoCode: "US"
category:
  name: "Scientists"
  slug: "scientists"
profileType:
  name: "Scientist"
  slug: "scientist"
  entityType: "https://www.wikidata.org/entity/Q39631"
birthDate: "1927-10-06"
deathDate: "2017-11-05"
livingStatus: "DECEASED"
scores:
  popularity:           41
  momentum:             20.33333333333334
  historical:           5.473290666666667
  currentAttention:     0
  sourceConfidence:     35
  profileCompleteness:  70
  trendDirection:       "BREAKOUT"
ranks:
  global:   null
  country:  null
  category: null
sources:
  - url: "https://de.wikipedia.org/wiki/William_A._Klemperer"
    title: "William A. Klemperer"
    type:  "WIKIPEDIA"
  - url: "https://arz.wikipedia.org/wiki/%D9%88%D9%84%D9%8A%D8%A7%D9%85_%D9%83%D9%84%D9%8A%D9%85%D8%A8%D9%8A%D8%B1%D8%B1"
    title: "وليام كليمبيرر"
    type:  "WIKIPEDIA"
  - url: "https://azb.wikipedia.org/wiki/%D9%88%DB%8C%D9%84%DB%8C%D8%A7%D9%85_%DA%A9%D9%84%D9%85%D9%BE%D8%B1%D8%B1"
    title: "ویلیام کلمپرر"
    type:  "WIKIPEDIA"
  - url: "https://sv.wikipedia.org/wiki/William_Klemperer"
    title: "William Klemperer"
    type:  "WIKIPEDIA"
  - url: "https://en.wikipedia.org/wiki/William_Klemperer"
    title: "William Klemperer"
    type:  "WIKIPEDIA"
  - url: "https://pt.wikipedia.org/wiki/William_Klemperer"
    title: "William Klemperer"
    type:  "WIKIPEDIA"
  - url: "https://www.wikidata.org/wiki/Q5913429"
    title: "Wikidata"
    type:  "WIKIDATA"

# bio (long form, separated for readability)
bio: |
  Imported from discovery source: wikidata-dump