[blowfish]

AuXe4 compounds are only stable at low temperatures (like -40C) or high pressure since the Au-Xe bonds are weak. The AuXe4²⁺ cation is dark red, and can be brought to room temperature only under 10 atmospheres of Xenon gas.

[agere_contra]

That makes sense. A neutral ligand only weakly coupled to the metal.

[OneWingedShark]

>AuXe4 compounds are only stable at low temperatures (like -40C) or high pressure since the Au-Xe bonds are weak.

As a side-not -40C = -40F... and is also the freezing point of mercury.

>The AuXe42+ cation is dark red, and can be brought to room temperature only under 10 atmospheres of Xenon gas.

That’s interesting; red is my favorite color... I’ve looked around a bit on google’s image-search and can’t find a picture of AuXe4.
10 Atmospheres appears to be around 150 psi, which is pretty high-pressure but nothing near the 1000psi that I heard tossed around in some of the BP/DeepWater-Horizon talks.