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<p>prepared immediately prior to the reactions or are generated in situ. In laboratory chemistry, in situ generation is most often accomplished by the use of a <a href="page.php?w=carbonate">carbonate</a> base or <a href="page.php?w=potassium_hydroxide">potassium hydroxide</a>, while in industrial syntheses <a href="page.php?w=phase_transfer_catalysis">phase transfer catalysis</a> is very common. A wide range of solvents can be used, but protic solvents and apolar solvents tend to slow the reaction rate strongly, as a result of lowering the availability</p><p>
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