QUANTUM CHEMICAL STUDY ON THE REARRANGEMENT FROM FORMIC ACID CATION TO DIHYDROXYMETHYLENE CATION

摘要

In the electronic-impact mass spectrum of formic acid, the formic acid cation [HCOOH].+ is one of the major fragment ions generated. The dihydroxymethylene cation [C（OH）2].+, which can be regarded as the enol form of formic acid cation, has already been observed in the mass spectrum of oxalic acid. The metastable peaks for the following