<a href="https://en.wikipedia.org/wiki/Skeletal_structure" class="extiw" title="en:Skeletal structure">Skeletal structure</a> of the <a href="https://en.wikipedia.org/wiki/tautomerization" class="extiw" title="en:tautomerization">tautomerization</a> of <a href="https://en.wikipedia.org/wiki/acetylacetone" class="extiw" title="en:acetylacetone">acetylacetone</a> and the <a href="https://en.wikipedia.org/wiki/Hydrogen_bond" class="extiw" title="en:Hydrogen bond">hydrogen bonding</a> of the <a href="https://en.wikipedia.org/wiki/enol" class="extiw" title="en:enol">enol</a> form.
<a href="//commons.wikimedia.org/wiki/User:DMacks" title="User:DMacks">DMacks</a> (<a href="//commons.wikimedia.org/wiki/User_talk:DMacks" title="User talk:DMacks"><span class="signature-talk">talk</span></a>)
<span class="int-own-work" lang="en">Own work</span> drawn in <a href="https://en.wikipedia.org/wiki/ChemDraw" class="extiw" title="en:ChemDraw">ChemDraw</a>