Reaction not complete. Refluxing toluene with <a href="https://en.wikipedia.org/wiki/sodium" class="extiw" title="en:sodium">sodium</a> desiccant and <a href="https://en.wikipedia.org/wiki/benzophenone" class="extiw" title="en:benzophenone">benzophenone</a> indicator/oxygen scavenger. Taken 4 Sep 2006.
<p>Keywords: <a href="https://en.wikipedia.org/wiki/reflux" class="extiw" title="en:reflux">reflux</a>, <a href="https://en.wikipedia.org/wiki/toluene" class="extiw" title="en:toluene">toluene</a>, <a href="https://en.wikipedia.org/wiki/sodium" class="extiw" title="en:sodium">sodium</a>, <a href="https://en.wikipedia.org/wiki/benzophenone" class="extiw" title="en:benzophenone">benzophenone</a>, <a href="https://en.wikipedia.org/wiki/distillation" class="extiw" title="en:distillation">distillation</a>, <a href="https://en.wikipedia.org/wiki/desiccation" class="extiw" title="en:desiccation">desiccation</a>
</p>
<h2><span class="mw-headline" id="Gallery">Gallery</span></h2>
<ul class="gallery mw-gallery-traditional"><li class="gallerybox" style="width: 155px"><div style="width: 155px">
			<div class="thumb" style="width: 150px;"><div style="margin:15px auto;"><a href="//commons.wikimedia.org/wiki/File:Benzophenone_bottle.jpg" class="image" title="A bottle of benzophenone by Lancaster."><img alt="A bottle of benzophenone by Lancaster." src="https://upload.wikimedia.org/wikipedia/commons/thumb/f/fb/Benzophenone_bottle.jpg/90px-Benzophenone_bottle.jpg" decoding="async" width="90" height="120" srcset="https://upload.wikimedia.org/wikipedia/commons/thumb/f/fb/Benzophenone_bottle.jpg/135px-Benzophenone_bottle.jpg 1.5x, https://upload.wikimedia.org/wikipedia/commons/thumb/f/fb/Benzophenone_bottle.jpg/180px-Benzophenone_bottle.jpg 2x" data-file-width="1200" data-file-height="1600"></a></div></div>
			<div class="gallerytext">
<p>A bottle of <b>benzophenone</b> by Lancaster.
</p>
			</div>
		</div></li>
		<li class="gallerybox" style="width: 155px"><div style="width: 155px">
			<div class="thumb" style="width: 150px;"><div style="margin:15px auto;"><a href="//commons.wikimedia.org/wiki/File:Toluene_with_sodium-benzophenone.jpg" class="image" title="]] and benzophenone to produce dry, oxygen-free toluene."><img alt="]] and benzophenone to produce dry, oxygen-free toluene." src="https://upload.wikimedia.org/wikipedia/commons/thumb/6/60/Toluene_with_sodium-benzophenone.jpg/90px-Toluene_with_sodium-benzophenone.jpg" decoding="async" width="90" height="120" srcset="https://upload.wikimedia.org/wikipedia/commons/thumb/6/60/Toluene_with_sodium-benzophenone.jpg/135px-Toluene_with_sodium-benzophenone.jpg 1.5x, https://upload.wikimedia.org/wikipedia/commons/thumb/6/60/Toluene_with_sodium-benzophenone.jpg/180px-Toluene_with_sodium-benzophenone.jpg 2x" data-file-width="1200" data-file-height="1600"></a></div></div>
			<div class="gallerytext">
<p>]] and benzophenone to produce dry, oxygen-free toluene.
</p>
			</div>
		</div></li>
		<li class="gallerybox" style="width: 155px"><div style="width: 155px">
			<div class="thumb" style="width: 150px;"><div style="margin:30px auto;"><a href="//commons.wikimedia.org/wiki/File:Toluene_with_sodium-benzophenone_-_brown.jpg" class="image" title="The mixture is still not blue yet indicating that the reaction is not complete."><img alt="The mixture is still not blue yet indicating that the reaction is not complete." src="https://upload.wikimedia.org/wikipedia/commons/thumb/c/c1/Toluene_with_sodium-benzophenone_-_brown.jpg/120px-Toluene_with_sodium-benzophenone_-_brown.jpg" decoding="async" width="120" height="90" srcset="https://upload.wikimedia.org/wikipedia/commons/thumb/c/c1/Toluene_with_sodium-benzophenone_-_brown.jpg/180px-Toluene_with_sodium-benzophenone_-_brown.jpg 1.5x, https://upload.wikimedia.org/wikipedia/commons/thumb/c/c1/Toluene_with_sodium-benzophenone_-_brown.jpg/240px-Toluene_with_sodium-benzophenone_-_brown.jpg 2x" data-file-width="1600" data-file-height="1200"></a></div></div>
			<div class="gallerytext">
<p>The mixture is still not blue yet indicating that the reaction is not complete.
</p>
			</div>
		</div></li>
		<li class="gallerybox" style="width: 155px"><div style="width: 155px">
			<div class="thumb" style="width: 150px;"><div style="margin:30px auto;"><a href="//commons.wikimedia.org/wiki/File:Toluene_with_sodium-benzophenone_-_intense_blue.jpg" class="image" title="The intense blue coloration due to the benzophenone ketyl radical shows that the toluene is considered free of air and moisture."><img alt="The intense blue coloration due to the benzophenone ketyl radical shows that the toluene is considered free of air and moisture." src="https://upload.wikimedia.org/wikipedia/commons/thumb/e/e3/Toluene_with_sodium-benzophenone_-_intense_blue.jpg/120px-Toluene_with_sodium-benzophenone_-_intense_blue.jpg" decoding="async" width="120" height="90" srcset="https://upload.wikimedia.org/wikipedia/commons/thumb/e/e3/Toluene_with_sodium-benzophenone_-_intense_blue.jpg/180px-Toluene_with_sodium-benzophenone_-_intense_blue.jpg 1.5x, https://upload.wikimedia.org/wikipedia/commons/thumb/e/e3/Toluene_with_sodium-benzophenone_-_intense_blue.jpg/240px-Toluene_with_sodium-benzophenone_-_intense_blue.jpg 2x" data-file-width="1600" data-file-height="1200"></a></div></div>
			<div class="gallerytext">
<p>The intense blue coloration due to the benzophenone ketyl radical shows that the toluene is considered free of air and moisture.
</p>
			</div>
		</div></li>
		<li class="gallerybox" style="width: 155px"><div style="width: 155px">
			<div class="thumb" style="width: 150px;"><div style="margin:30px auto;"><a href="//commons.wikimedia.org/wiki/File:Distillation_of_dry_and_oxygen-free_toluene.jpg" class="image" title="After the toluene has been thoroughly dried by the sodium and benzophenone, it is distilled at atmospheric pressure under a slight positive pressure of nitrogen to prevent contamination by air into the receiving Schlenk flask."><img alt="After the toluene has been thoroughly dried by the sodium and benzophenone, it is distilled at atmospheric pressure under a slight positive pressure of nitrogen to prevent contamination by air into the receiving Schlenk flask." src="https://upload.wikimedia.org/wikipedia/commons/thumb/5/5a/Distillation_of_dry_and_oxygen-free_toluene.jpg/120px-Distillation_of_dry_and_oxygen-free_toluene.jpg" decoding="async" width="120" height="90" srcset="https://upload.wikimedia.org/wikipedia/commons/thumb/5/5a/Distillation_of_dry_and_oxygen-free_toluene.jpg/180px-Distillation_of_dry_and_oxygen-free_toluene.jpg 1.5x, https://upload.wikimedia.org/wikipedia/commons/thumb/5/5a/Distillation_of_dry_and_oxygen-free_toluene.jpg/240px-Distillation_of_dry_and_oxygen-free_toluene.jpg 2x" data-file-width="1600" data-file-height="1200"></a></div></div>
			<div class="gallerytext">
<p>After the toluene has been thoroughly dried by the sodium and benzophenone, it is distilled at atmospheric pressure under a slight positive pressure of nitrogen to prevent contamination by air into the receiving Schlenk flask.
</p>
			</div>
		</div></li>
</ul>
<a href="https://en.wikipedia.org/wiki/User:Rifleman_82" class="extiw" title="wikipedia:User:Rifleman 82">Rifleman 82</a> at <a href="https://en.wikipedia.org/wiki/" class="extiw" title="wikipedia:">English Wikipedia</a>
4 September 2006 (original upload date)
Transferred from <span class="plainlinks"><a class="external text" href="https://en.wikipedia.org">en.wikipedia</a></span> to Commons by <a href="//commons.wikimedia.org/wiki/User:Liftarn" title="User:Liftarn">Liftarn</a> using <a href="https://iw.toolforge.org/commonshelper/" class="extiw" title="toollabs:commonshelper/">CommonsHelper</a>.