First characterization of arsenic porphyrins: synthesis and X-ray structure of [(oep)AsMe(OH)]+ClO4–

[(oep)As(OH)2]ClO4 is synthesized in good yields by non-nucleophilic oxidative treatment of (oep)AsCl with pyridinium tribromide followed by hydrolysis and is converted to [(oep)AsMe(OH)]ClO4 with AlMe3.