thiophenyl
Thiophenyl is a term that can refer to a few different chemical concepts, primarily related to the thiophene ring system. A thiophenyl group is a substituent derived from thiophene, a five-membered aromatic ring containing one sulfur atom and four carbon atoms. When this thiophene ring is attached to another molecule, it is often referred to as a thiophenyl moiety. The position of attachment on the thiophene ring is important and is usually indicated by a number, such as 2-thiophenyl or 3-thiophenyl, denoting attachment at the second or third carbon atom, respectively, relative to the sulfur atom.
In some contexts, particularly in organic chemistry literature, "thiophenyl" might be used as a shorthand for
The chemical formula for the thiophenyl radical, if considered as a free radical, would be C4H3S. However,