In most organic compounds, nitrogen uses three of its five valence electrons to form bonds with surrounding atoms whilst keeping the other two as a lone pair. Similarly, with the exception of carbon monoxide, carbenes, and isonitriles, carbon is normally tetravalent in organic molecules. However, following seminal work from Ramírez [1] and inspiring theoretical studies from Frenking,[2] Bertrand [3] and Fürstner [4] have synthesized and ...
![2,3-bis[di(propan-2-yl)amino]cycloprop-2-ene-1-thione Structure](https://image.chemsrc.com/caspic/388/41597-07-3.png)