A study of the polarographic reduction of the acridizinium and phenanthridizinium ions

✍ Scribed by Jackie G. Frost; John H. Saylor

• Book ID: 104586673
• Publisher: Elsevier Science
• Year: 2010
• Tongue: English
• Weight: 331 KB
• Volume: 82
• Category: Article
• ISSN: 0165-0513
• DOI: 10.1002/recl.19630820815

✦ Synopsis

Abstract

The properties of acridizinium and phenanthridizinium at the dropping mercury electrode have been investigated, and a mechanism for reduction is proposed. Acridizinium is reduced in two one‐electron stages at potentials of −0.807 volts and −1.022 volts in acid and neutral solutions, these values being independent of pH. In basic solution, these two reduction steps disappear and two other waves appear at potentials of approximately −1.5 volts and −2.1 volts (vs. saturated calomel electrode). This change in polarographic behavior has been linked with “pseudo‐base” formation. Phenanthridizinium is reduced in a single two‐electron step with a measured half‐wave potential of −1.202 volts. The reduction potential is independent of pH.