Notes on Running Reactions: Page 1

Adding Reagents, Reaction Vessels

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Adding Reagents: (see also: How to Weigh Reactants)

Solids

Liquids

Gases

Atmospheric pressure of hydrogen, carbon monoxide, or carbon dioxide: Addition is accomplished by replacing the atmosphere of the reaction mixture with the gas using a balloon. First, the gas is bubbled through the solution (via pipette/tubing or needle/luer lock/tubing) for a few minutes to achieve saturation. Then, the balloon is left connected to the flask for the duration of the reaction, providing ~1 atm (aka "positive pressure") of gas.

Slow Addition

When a procedure requires "dropwise addition" of a reagent.

Reaction Vessels

See also: How to work in an Inert Atmosphere