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Title: Über Oxidationszahl‐Obergrenzen in der Chemie

Journal Article · · Angewandte Chemie
 [1];  [2];  [2];  [3];  [3]; ORCiD logo [3]; ORCiD logo [4]; ORCiD logo [5]; ORCiD logo [6]; ORCiD logo [7]; ORCiD logo [8]; ORCiD logo [2]
  1. Key Laboratory of Organic Optoelectronics &, Molecular Engineering of the Ministry of Education Department of Chemistry Tsinghua University Beijing 100084 China, Beijing Computer Science Research Center Haidian Beijing 100193 China
  2. Key Laboratory of Organic Optoelectronics &, Molecular Engineering of the Ministry of Education Department of Chemistry Tsinghua University Beijing 100084 China
  3. Chemical Theory Center Department of Chemistry, and Minnesota Supercomputing Institute University of Minnesota Minneapolis MN 55455-0431 USA
  4. Chemical Sciences Division Lawrence Berkeley National Laboratory Berkeley CA 94720 USA
  5. Centro de Ciências e Tecnologias Nucleares Instituto Superior Técnico Universidade de Lisboa 2695-066 Bobadela LRS Portugal
  6. Department of Chemistry Fudan University Shanghai 200433 China
  7. Anorganische Chemie Institut für Chemie und Biochemie Freie Universität Berlin 14195 Berlin Deutschland
  8. Key Laboratory of Organic Optoelectronics &, Molecular Engineering of the Ministry of Education Department of Chemistry Tsinghua University Beijing 100084 China, Physical and Theoretical Chemistry Lab Universität Siegen 57068 Siegen Deutschland

Abstract Der Begriff Oxidationszahl ( OS ) ist auf der Basis des Lewis‐Elektronenpaar‐Bildes definiert, wobei Bindungselektronen dem jeweils elektronegativeren Element zugeordnet werden. Der Begriff ist hilfreich zur “Buchhaltung” der Elektronen, zur Vorhersage von chemischen Trends und zur Planung von Synthesewegen. Experimentelle und quantenchemische Befunde legen eine obere Grenze von etwa +8 für die OS in stabilen (neutralen) chemischen Substanzen unter normalen Bedingungen nahe. OS =+9 wurde für das isolierte [IrO 4 ] + ‐Kation in der Gasphase beobachtet. Vorhergesagte OS =+10 für das isolierte [PtO 4 ] 2+ ‐Kation wird hier theoretisch nur für tiefe Temperaturen bestätigt, konnte aber noch nicht experimentell verifiziert werden. Verbindungen mit hoher OS tendieren zur spontanen Reduktion des zentralen Metallatoms unter Oxidation der Liganden, etwa von O −2 unter Bildung von . O −1 und O‐O‐Bindungen, wobei nicht‐Lewis‐konforme Strukturen gebildet werden können.

Sponsoring Organization:
USDOE
Grant/Contract Number:
SC0015997
OSTI ID:
1422007
Journal Information:
Angewandte Chemie, Journal Name: Angewandte Chemie Journal Issue: 12 Vol. 130; ISSN 0044-8249
Publisher:
Wiley Blackwell (John Wiley & Sons)Copyright Statement
Country of Publication:
Germany
Language:
English

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