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Title: On the Upper Limits of Oxidation States in Chemistry

Journal Article · · Angewandte Chemie (International Edition)
 [1];  [2];  [3];  [4];  [4]; ORCiD logo [4]; ORCiD logo [5]; ORCiD logo [6]; ORCiD logo [7]; ORCiD logo [8]; ORCiD logo [9]; ORCiD logo [2]
  1. Tsinghua Univ., Beijing (China). Key Lab. of Organic Optoelectronics & Molecular Engineering of the Ministry of Education, Dept. of Chemistry; Beijing Computer Science Research Center Haidian, Beijing (China)
  2. Tsinghua Univ., Beijing (China). Key Lab. of Organic Optoelectronics & Molecular Engineering of the Ministry of Education, Dept. of Chemistry
  3. Tsinghua Univ., Beijing (China). Key Lab. of Organic Optoelectronics & Molecular Engineering of the Ministry of Education, Dept. of Chemistry; Univ. of Minnesota, Minneapolis, MN (United States). Minnesota Supercomputing Inst., Chemical Theory Center, Dept. of Chemistry
  4. Univ. of Minnesota, Minneapolis, MN (United States). Minnesota Supercomputing Inst., Chemical Theory Center, Dept. of Chemistry
  5. Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States). Chemical Sciences Division
  6. Univ. de Lisboa, Bobadela (Portugal). Centro de Ciencias e Tecnologias Nucleares, Inst. Superior Tecnico
  7. Fudan Univ., Shanghai (China). Dept. of Chemistry
  8. Freie Univ. Berlin, Berlin (Germany). Anorganische Chemie, Inst. fur Chemie und Biochemie
  9. Tsinghua Univ., Beijing (China). Key Lab. of Organic Optoelectronics & Molecular Engineering of the Ministry of Education, Dept. of Chemistry; Univ. Siegen, Siegen (Germany). Physical and Theoretical Chemistry Lab.

Abstract The concept of oxidation state ( OS ) is based on the concept of Lewis electron pairs, in which the bonding electrons are assigned to the more electronegative element. This approach is useful for keeping track of the electrons, predicting chemical trends, and guiding syntheses. Experimental and quantum‐chemical results reveal a limit near +8 for the highest OS in stable neutral chemical substances under ambient conditions. OS =+9 was observed for the isolated [IrO 4 ] + cation in vacuum. The prediction of OS =+10 for isolated [PtO 4 ] 2+ cations is confirmed computationally for low temperatures only, but hasn't yet been experimentally verified. For high OS species, oxidation of the ligands, for example, of O −2 with formation of . O −1 and O−O bonds, and partial reduction of the metal center may be favorable, possibly leading to non‐Lewis type structures.

Research Organization:
Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES); National Natural Science Foundation of China (NSFC); USDOE
Grant/Contract Number:
AC02-05CH11231; 21590792; 91426302; 91645203; 2170106; 21433005; U1530401; SC0015997; UID/Multi/04349/2013; AC02-05CH1123
OSTI ID:
1461134
Alternate ID(s):
OSTI ID: 1422008
Journal Information:
Angewandte Chemie (International Edition), Vol. 57, Issue 12; ISSN 1433-7851
Publisher:
WileyCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 42 works
Citation information provided by
Web of Science

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An Objective Alternative to IUPAC's Approach To Assign Oxidation States journal August 2018
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Homoleptic Trifluoromethyl Derivatives of Ag I and Ag III journal August 2018
Beyond Oxides: Nitride as a Ligand in a Neutral Ir IX NO 3 Molecule Bearing a Transition Metal at High Oxidation State journal July 2019
Unexpected Molecular Structure of a Putative Rhenium‐Dioxo‐Benzocarbaporphyrin Complex. Implications for the Highest Transition Metal Valence in a Porphyrin‐Type Ligand Environment journal October 2019
Unraveling the highest oxidation states of actinides in solid-state compounds with a particular focus on plutonium journal January 2019
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Figures / Tables (4)