Back in high school I did something most people would think stupid: I tasted sulfuric acid, not a lot, but enough to know that it was incredibly sour. You wouldn’t however get me to do the same with the above chemical, known as Fluroantimonic Acid, or more colloquially “The World’s Strongest Acid”. While the above structure may seem a little odd in that it appears to just have a proton chilling doing its own thing this superacid is in fact made of two components, firstly antimony pentafluoride and secondly hydrogen fluoride, itself an acid strong enough to corrode glass. The hydrogen itself is actually weakly connected to the antimony-fluorine complex by a dative bond and it’s this weak bond that makes it so acidic.
So just how acidic is it? Well it’s 20 quintillion times stronger than sulfuric acid and reacts vigorously (read: explodes) with almost all solvents including water. Furthermore it’s capable of protonating all organic compounds, something that is no small feat.