Using quantum chemical methodology, we reinvestigate the aromaticity of the much debated arsole, using the newly developed gauge-including magnetically induced currents (GIMIC) method. GIMIC provides a quantitative measure of the induced ring current strength, showing arsole to be moderately aromatic. Comparison is made with pyrrole, phosphole, and cyclopentadiene.
aromaticity, arsenic, heterocycles, small ring systems, quantum chemistry
Department of Chemistry, Laboratory for Instruction in Swedish, P. O. Box 55, FI-00014 Universityof Helsinki, Finland.