Tags: Chemical Compound, Chemical Substance.
Arsole also called arsenole or arsacyclopentadiene is an organoarsenic compound with the formula C4H4AsH. It is classified as a metallole and is isoelectronic to and related to pyrrole except that an arsenic atom is substituted for the nitrogen atom. Whereas the pyrrole molecule is planar the arsole molecule is not and the hydrogen atom bonded to arsenic extends out of the molecular plane. Arsole is only moderately aromatic with about 40% the aromaticity of pyrrole.
