There's been an unsolved mystery associated with mixed valence compounds: when the valence state of an element in these compounds changes with increased temperature, the number of electrons associated ...

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Mixed-valence compounds — which have one or more of the same metal atoms in different oxidation states — are fairly common, with examples such as Fe 3 O 4 and Prussian blue being known for some time.

Molecular structure of the new 20-electron ferrocene derivative, highlighting nitrogen (blue), iron (orange), hydrogen (green), and carbon (grey) atoms. Credit: Modified from Nature Communications ...

For over a century, the well-known 18-electron rule has guided the field of organometallic chemistry. Now, researchers at Okinawa Institute of Science and Technology (OIST) have successfully ...

One of the chief chemical characteristics of sulfur is its ability to form bonds to other sulfur atoms. These bonds and their chemistry are found in many proteins, as well as synthetic compounds. In ...