Volume 92 Issue 43 | p. 7 | News of The Week
Issue Date: October 27, 2014 | Web Date: October 23, 2014

Iridium Dressed To The Nines

Periodic Table: IrO4+ is the first molecule with an element in the +9 oxidation state
Department: Science & Technology | Collection: Periodic table
News Channels: Analytical SCENE, Materials SCENE
Keywords: oxidation state, oxidizing agent, structure and bonding, noble gas

The oxidation state of an atom in a molecule is an important means of electron bookkeeping and determining structure and bonding, so the question of just how high oxidation states can go has long piqued chemists’ interest. That ceiling has now reached what was once believed to be an impossibly high level with the preparation of IrO4+, the first example of a molecule with an oxidation state of +9.

“Wow. The discovery that chemical compounds . . .

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