The structure of a molecule with this number of carbon atoms was imagined by August Kekule in a dream.
A leak of a molecule with this number of carbon atoms was the cause of the Flixborough disaster. When n equals one, Huckel's rule predicts a molecule with this number of pi electrons will be aromatic. The structure of a molecule with this number of carbon atoms was imagined by August Kekule in a dream. A different molecule with this number of carbons can exist in either the boat or chair conformation. In the compound BF3, there are only this number of valence electrons around boron. The element with this atomic number has allotropes such as graphene and diamond. For 10 points, name this number of carbon atoms in a molecule of either benzene or cyclohexane. 
A leak of a molecule with this number of carbon atoms was the cause of the Flixborough disaster.
six