Osmium

Also known as Os, element 76, 76Os

chemisches Element mit dem Symbol Os und der Ordnungszahl 76

OverviewAI-generated

Osmium is a chemical element with the symbol Os and atomic number 76. It has an atomic mass of 190.23 and an electron configuration of [Xe] 4f¹⁴ 5d⁶ 6s². The element exhibits an oxidation state of 8 and an electronegativity of 2.2. Its ionic radius is 0.63.

The substance was discovered in 1804. It is represented by the canonical SMILES string [Os] and the Unicode character 鋨. In chemical contexts, it is identified by the formula Os. PubChem lists its CID as 23937 and its IUPAC name as osmium. The compound has a weight of 190.2, a topological polar surface area of 0, and no hydrogen bond donors or acceptors.

Synthesized by Vinony from 25 facts across 4 sources: Wikidata, PubChem, PubMed, Vinony graph. Generated from structured data (not the Wikipedia text) and checked against those facts — may still contain errors.

Chemical data

Formula: Os
Molecular weight: 190.2 g/mol
IUPAC name: osmium
SMILES: [Os]
InChIKey: SYQBFIAQOQZEGI-UHFFFAOYSA-N
Polar surface area: 0 Å²
H-bond donors: 0
H-bond acceptors: 0
Formal charge: 0

via PubChem

Research

6,444 papers

Osmium-free direct syn-dihydroxylation of alkenes.ReviewChemical Society reviews · 2011Bataille CJ, Donohoe TJDOI: 10.1039/b923880h
Structure-activity relationships for ruthenium and osmium anticancer agents - towards clinical development.ReviewChemical Society reviews · 2018Meier-Menches SM , Gerner C , Berger W et al.DOI: 10.1039/c7cs00332c
Recent Advances in Anticancer Research of Osmium and Rhodium Complexes.ReviewMedicinal chemistry (Shariqah (United Arab Emirates)) · 2025Kostova IDOI: 10.2174/0115734064327558240826050650
Osmium-Resistant Fluorescent Proteins and In-Resin Correlative Light-Electron Microscopy of Epon-Embedded Mammalian Cultured Cells.Methods in molecular biology (Clifton, N.J.) · 2023Tanida I, Yamaguchi J, Kakuta S et al.DOI: 10.1007/978-1-0716-2667-2_15
Osmium(VI) nitride triggers mitochondria-induced oncosis and apoptosis.Chemical communications (Cambridge, England) · 2022Ye M, Huang WQ, Li ZX et al.DOI: 10.1039/d1cc05148b
Imido-osmium(VIII) compounds in organic synthesis: aminohydroxylation and diamination reactions.ReviewChemical Society reviews · 2004Muñiz KDOI: 10.1039/b307102m
Future potential of osmium complexes as anticancer drug candidates, photosensitizers and organelle-targeted probes.ReviewDalton transactions (Cambridge, England : 2003) · 2018Zhang P , Huang H DOI: 10.1039/c8dt03432j
Development of anticancer agents: wizardry with osmium.ReviewDrug discovery today · 2014Hanif M, Babak MV, Hartinger CGDOI: 10.1016/j.drudis.2014.06.016

via PubMed

Wikidata facts

Instance of: chemical element
Subclass of: platinum group
Part of: group 8
Named after: odor
Mass: 190.23
Image: Osmium crystals.jpg

Show 16 more facts

oxidation state: 8
electron configuration: [Xe] 4f¹⁴ 5d⁶ 6s²
topic's main category: Category:Osmium
discoverer or inventor: William Hyde Wollaston
element symbol: Os
Commons category: Osmium
time of discovery or invention: 1804-00-00
atomic number: 76
Commons gallery: Osmium
described by source: Encyclopædia Britannica 11th edition
canonical SMILES: [Os]
chemical formula: Os
Unicode character: 鋨
electronegativity: 2.2
ionic radius: 0.39
on focus list of Wikimedia project: Wikipedia:Vital articles/Level/4

Sources (6)

via Wikidata · CC0

Article · Deutsch

Osmium ist ein chemisches Element mit dem Elementsymbol Os und der Ordnungszahl 76; im Periodensystem der Elemente steht es in der 8. Gruppe, der Eisengruppe. Es ist ein hartes, sprödes, stahlblaues Übergangsmetall und gehört zu den Platinmetallen. Osmium besitzt mit 462 GPa den höchsten Kompressionsmodul aller Elemente, lediglich übertroffen von aggregierten Diamant-Nanostäbchen, und mit 22,6 g/cm3 die höchste Dichte. Biologische Funktionen von Osmium sind weder im menschlichen noch in anderen Organismen bekannt. Technisch wird Osmium wegen seines hohen Preises nur verwendet, wenn Haltbarkeit und Härte ausschlaggebend sind.

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