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<a accesskey="3" href="page.php?w=Wittig_reagents&amp;p=2">3.Next</a>
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<p>In <a href="page.php?w=organic_chemistry">organic chemistry</a>, <b>Wittig reagents</b> are <a href="page.php?w=organophosphorus_compound">organophosphorus compound</a>s of the formula R<sub>3</sub>P=CHR', where R is usually <a href="page.php?w=phenyl">phenyl</a>. They are used to convert ketones and aldehydes to alkenes:<br/>
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<p><big> Preparation</big></p>
<p>Because they typically hydrolyze and oxidize readily, Wittig reagents are prepared using <a href="page.php?w=air-free_technique">air-free technique</a>s. They are typically generated and</p><p>
<a accesskey="3" href="page.php?w=Wittig_reagents&amp;p=2">3.Next</a>
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