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<p>bromine water by electron-rich arenes is used in the <a href="page.php?w=bromine_test">bromine test</a>.</p>

<p>The <a href="page.php?w=oxychlorination">oxychlorination</a> of benzene has been well investigated, motivated by the avoidance of HCl as a coproduct in the direct halogenation:<br/>
:This technology is not widely used however.</p>

<p>The <a href="page.php?w=Gatterman_reaction">Gatterman reaction</a> can also be used to convert diazonium salts to chlorobenzenes using copper-based reagents.  Owing to high cost of <a href="page.php?w=diazonium_salt">diazonium salt</a>s,</p><p>
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