Abstract
This study detected the extremely reactive carbenoid, 1,2,3-hexatriene-5-one (HTO), by low-temperature atmospheric pressure ionization (API) mass spectrometry. During the analysis the sample solution was maintained at −78 °C in the API source to prevent the analyte molecule from polymerizing. At this low temperature a strong protonated HTO signal was detected. At room temperature the compound polymerized rapidly and the mass spectrum was dominated by dimer ions. Signals due to protonated HTO- (H2O)2 adducts were also detected, and can possibly be attributed to trace water in the organic solvent, or to ionization of the moisture as in atmospheric pressure chemical ionization. © 1998 John Wiley & Sons, Ltd.
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