Knowledge Bank

In a paper presented at this symposium in 2001 and subsequently $publisheda$, Molski claimed to have determined the electric dipolar moment of $ArH+$ from only frequency data involving pure rotational and vibration-rotational transitions. Careful analysis of all available data confirms that, although a rough value of the rotational g factor might be estimated that agrees with both experiment through the Zeeman effect and quantum-chemical calculations, no sensible value of electric dipolar moment can be analogously $derivedb$ because isotopic data are too few and all data lack sufficient precision and consistency. Molski's $treatmenta$ involves an incorrect formula that might have contributed to his erroneous conclusion.