出典:Wiktionary
出典:Wikipedia
出典:『Wikipedia』 (2011/05/25 21:22 UTC 版)
In organic chemistry, a heteroatom (from Ancient Greek heteros, different, + atomos) is any atom that is not carbon or hydrogen. Usually, the term is used to indicate that non-carbon atoms have replaced carbon in the backbone of the molecular structure. Typical heteroatoms are nitrogen, oxygen, sulfur, phosphorus, boron, chlorine, bromine, and iodine.