exchange reaction
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chemical effects of isotopes
- In isotope: Chemical effects of isotopic substitution
The exchange reaction H2 + D2 → 2HDprovides an example of random behaviour at high temperature and isotope-specific behaviour at lower ones. If two volumes of gas consisting, respectively, of H2 and D2 only, are mixed, the hydrogen–hydrogen and deuterium–deuterium bonds will gradually break and new…
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types of metamorphic reactions
- In metamorphic rock: Principal types
…pressure changes: net-transfer reactions and exchange reactions. Net-transfer reactions involve the breakdown of preexisting mineral phases and corresponding nucleation and growth of new phases. (Nucleation is the process in which a crystal begins to grow from one or more points, or nuclei.) They can be either solid-solid reactions (mineral A…
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use of isotopic labeling
- In mass spectrometry: Organic chemistry
…intermolecular process is involved; in exchange reactions it can show that particular atoms of, for example, hydrogen are exchanging between the reacting species. Labeling is also widely used in mass-spectrometric research to give information about the fragmentation reactions occurring in the mass spectrometer.
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