Heat of Formation for the Methylenimmonium Cation by Photoionization Mass Spectrometry
| Autor: | Zoë A. Harvey, John C. Traeger |
|---|---|
| Rok vydání: | 2004 |
| Předmět: |
Collision-induced dissociation
Chemistry 010401 analytical chemistry Selected reaction monitoring Analytical chemistry Thermospray General Medicine Thermal ionization mass spectrometry Fast atom bombardment 010402 general chemistry Mass spectrometry 01 natural sciences Atomic and Molecular Physics and Optics Sample preparation in mass spectrometry 0104 chemical sciences Inductively coupled plasma mass spectrometry Spectroscopy |
| Zdroj: | European Journal of Mass Spectrometry. 10:759-765 |
| ISSN: | 1751-6838 1469-0667 |
| Popis: | Photoionization mass spectrometry has been used to measure the CH2NH2+ appearance energies for six primary amines, resulting in a 298K heat of formation of 749.5 ± 1.3 kJ mol−1 for the methylenimmonium cation. An absolute proton affinity of 868.8 ± 2.5 kJ mol−1 is derived for methylenimine. Based on experimental data for ethylenediamine, the 298 K heat of formation for the aminomethyl radical is found to be 153.6 ± 1.7 kJ mol−1. These results are supported by high-level ab initio calculations. |
| Databáze: | OpenAIRE |
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