Arsole

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. Arsole itself has not been reported in pure form, but several substituted analogs called arsoles exist. Arsoles and more complex arsole derivatives have similar structure and chemical properties to those of phosphole derivatives. When arsole is fused to a benzene ring, this molecule is called arsindole, or benzarsole.

Arsole
Names
Preferred IUPAC name
1H-Arsole
Other names
Arsenole
Arsacyclopentadiene
Identifiers
3D model (JSmol)
ChEBI
ChemSpider
UNII
  • InChI=1S/C4H5As/c1-2-4-5-3-1/h1-5H Y
    Key: NXHAKHHKDBVHPV-UHFFFAOYSA-N Y
  • InChI=1/C4H5As/c1-2-4-5-3-1/h1-5H
    Key: NXHAKHHKDBVHPV-UHFFFAOYAK
  • [AsH]1C=CC=C1
Properties
C4H4AsH
Molar mass 128.00 g mol−1
Related compounds
Related compounds
 Pyrrole, phosphole, bismole, stibole
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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Infobox references
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