Arsoles are aromatic. Add a CH to an arsole and it becomes arsinine.
I don’t think any comedic creativity is involved, though, as these funny names come from just applying standard nomenclature rules when adding a bit of arsenic to a benzene ring.
Yes I know. I was, er, yer know, joking.
This is an interesting molecule. Evidently there is enough p-orbital overlap to give some pi-bonding (very slightly shorter bond length than C-As single bond) and some aromatic properties (e.g. ring current), in spite of the large size of a 4p orbital compared to the 2p ones on carbon. But as the Diels-Alder reaction shows, it is a sort of halfway house.
I don't understand the conflicting information about its boiling point. It is described as both a liquid and a gas and the BP data gives a range. It is said that it decomposes on heating, but at what temperature and to give what products is not explained.
Edited by exchemist, 24 March 2017 - 02:45 AM.