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CHAPTER 19
More About Amines • Reactions of Heterocyclic Compounds
Important Terms
furan
a five-membered ring aromatic compound with an oxygen ring atom.
heteroatom
an atom other than a carbon or a hydrogen.
heterocyclic compound
a cyclic compound in which one or more of the ring atoms are heteroatoms.
(heterocycle)
imidazole
a five-membered ring aromatic compound with two nitrogen ring atoms.
ligation
the sharing of nonbonded electrons with a metal.
porphyrin ring system
a compound that consists of four pyrrole rings joined by one-carbon bridges.
purine
a pyrimidine ring fused to an imidazole ring.
pyrimidine
a benzene ring with nitrogens at the 1- and 3-positions.
pyrrole
a five-membered ring aromatic compound with a nitrogen ring atom.
thiophene
a five-membered ring aromatic compound with a sulfur ring atom.