<a href="https://en.wikipedia.org/wiki/Acetylene" class="extiw" title="en:Acetylene">Acetylene</a> 2D structure.
<a href="//commons.wikimedia.org/wiki/User:Yikrazuul" title="User:Yikrazuul">Yikrazuul</a>; <b><a href="//commons.wikimedia.org/wiki/User:Sarregouset" title="User:Sarregouset">Sarregouset</a></b><small> <a href="//commons.wikimedia.org/wiki/User_talk:Sarregouset" title="User talk:Sarregouset">(Talk)</a></small>
Own work, made with <a href="https://en.wikipedia.org/wiki/BKchem" class="extiw" title="en:BKchem">BKchem</a> and hand edited.