We'd like to use analytics cookies to understand which symbols people look up, so we know what to research next. They are not used for advertising and we set none of them unless you say yes. What we store.
Reagents above an arrow and conditions below it.
Also known as: Above-arrow reagents, Reaction conditions notation
A reaction arrow carries its reagents above and its conditions below — solvent, temperature, time. Numbered entries above the arrow mean sequential steps rather than a mixture, which is a distinction that changes the experiment entirely.
Place reagents above a reaction arrow and conditions such as solvent, temperature and time below it.
Contexts: Laboratory
Use numbered entries above the arrow to mean sequential addition rather than a mixture, so a numbered list is a procedure and not a recipe.
Contexts: Laboratory
Use a capital delta above the arrow for heating, a convention older than the modern temperature notation.
Contexts: Laboratory
Small text and formulae printed above and below a horizontal arrow between two structures.