Ion kinetic energy spectrometry allows the study of both unimolecular and bimolecular reactions and is a unique source of information on thermochemistry, molecular structure, isotopic quantitation, and reaction dynamics

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The 70eV electron ionization mass spectra of polycyclic aromatic compounds are characterized by the presence of relatively stable multiply charged molecular iolls m]"+ (n=24). When generated from the compounds benzene, napthalene, anthracene, phenanthrene, 2,3-benzanthracene, 1,2-benzanthracene, chrysene, 9,lO-benzopbenanthrene and pyrene, the relative abundances of the multiply charged ions increase dramatically with the number of Mgs. These compounds form multiply charged molecular ions

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