A derivative of this compound is treated with bisulfite to synthesize uracil. For 10 points each:
[10m] Name this cyclic compound present in uracil and cytosine, which also names a class of nucleobases.
ANSWER: pyrimidines
[10e] Pyrimidines and purines engage in base pairing using these strongest intermolecular forces. These interactions form between a namesake element on one molecule and a highly electronegative element on another.
ANSWER: hydrogen bonds [or hydrogen bonding; accept H-bonds or H-bonding]
[10h] Purine nucleobases consist of a pyrimidine ring along with this other ring. This nitrogen heterocycle is present in the side chain of histidine.
ANSWER: 1H-imidazole [or ImH; or 1,3-diazole; or glyoxaline; or 1,3-diaza·cyclopenta-2,4-diene; prompt on diazole alone]
<CT, Chemistry>