Schlenk line
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The Schlenk line is a commonly used chemistry apparatus developed by Wilhelm Schlenk. It consists of a dual manifold with several ports. One manifold is connected to a source of purified inert gas, wh
A Schlenk line with four ports. The cold trap is on the right.
Close-up view, showing the double-oblique stopcock, which allows vacuum (rear line) or inert gas (front line) to be selected
The two reactants for an aldol reaction are prepared in adjacent flasks, ready for one to be transferred to the other while maintaining air-free conditions
A yellow suspension is filtered through a sintered-glass funnel into another Schlenk flask under air-free conditions
Air-free technique
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Air-free techniques refer to a range of manipulations in the chemistry laboratory for the handling of compounds that are air-sensitive. These techniques prevent the compounds from reacting with compon
Schlenk line
…into the cold trap as a pale blue liquid. An explosion may occur due to reaction of the liquid oxygen with any organic compounds also in the trap. Air-free technique gives a broad overview of methods including: Glovebox – used to manipulate air-sensitive (oxygen- or moisture-sensitive) chemicals. Schlenk flask…
An ordinary glovebox, showing the two gloves for manipulation, with airlock on the right.
After being refluxed with sodium and benzophenone to remove oxygen and water, toluene is distilled under inert gas into a receiving flask.