How do you name a fused ring?
How do you name a fused ring?
1 Hydrocarbons consisting of four or more ortho-fused benzene rings in a rectilinear arrangement are named by citing a numerical prefix denoting the number of benzene rings followed by the term ‘-acene’ with elision of an ‘a’ .
How do you name fused heterocycles?
3.5 – As exceptions, two-ring systems in which a benzene ring is fused to a hetero ring may be named by prefixing numbers indicating the positions of the hetero atoms to benzo followed by the name of the heterocyclic component.
How do you name a benzene ring with substituents?
For substituted benzene rings where the substituent contains more than six carbons, the benzene ring is noted by using a phenyl prefix on the alkane name. For substituted benzene rings where the substituent contains less than six carbons, the alkyl chain is added as a prefix with the ending changed to -yl.
How do you name a bicyclic alkane?
IUPAC names for bicylic alkanes have the format bicyclo[a.b.c]parent name.
- Count the total number of carbons across the entire molecule.
- Count the number of carbons to the left, and to the right, and above your bridgehead carbons.
- Write your final IUPAC name as bicyclo[a.b.c]parent name.
How do you name Pyrroles?
1H-Pyrrole
Pyrrole/IUPAC ID
What are fused heterocyclic compounds with examples?
Included are pyridine, thiophene, pyrrole, and furan. Another large class of heterocycles refers to those fused to benzene rings. For example, the fused benzene derivatives of pyridine, thiophene, pyrrole, and furan are quinoline, benzothiophene, indole, and benzofuran, respectively.
What is fused ring compound?
Fused rings share two adjacent carbon atoms. Decalin is a fused bicyclic compound. Its IUPAC name is bibyclo[4.4. Bridged rings share two non-adjacent carbon atoms and one or more carbon atoms between them.
How do you write Iupac names of aromatic compounds?
IUPAC nomenclature of aromatic hydrocarbons is explained below: 1. According to IUPAC nomenclature of substituted aromatic compounds, the substituent name is placed as a prefix to the name of aromatic compounds. For example, a benzene ring attached to a one-nitro group is named as nitrobenzene.
How do you name Iupac bicyclic compounds?
What is meant by an ortho-fused ring system?
Polycyclic ring systems in which any two adjacent rings have two, and only two, adjacent atoms in common are said to be ‘ortho-fused’. Such ring systems have n common sides and 2ncommon atoms.
What is fusion nomenclature in chemistry?
R-2.4.1 Fusion nomenclature. Polycyclic ring systems in which a ring contains two, and only two, adjacent atoms in common with each of two or more rings of a contiguous series of ortho -fused rings are said to be ‘ ortho – and peri -fused’. Such ring systems have n common sides and fewer than 2 n common atoms.
How are fused heterocyclic ring systems synthesized?
A general approach to the synthesis of (6:5:6) fused heterocyclic ring systems involves intramolecular cyclization of two substituents attached to a five-membered ring of the fused (6:5) system. A typical example is cyclization of 211 to generate an imine 212, which undergoes hydrolysis to the tricyclic lactone 213 ( Scheme 8) <1998CPB1632>.
How are ortho-fused polycyclic rings named?
R-2.4.1.1 ortho-Fused or ortho- and peri-fused polycyclic ring systems with the maximum number of noncumulative double bonds and which have no accepted trivial or semisystematic name, are named by selecting a component having a trivial or semisystematic name as a principal component and designating the other components as a prefix.
