How do you name fused heterocyclic compounds?
3.1 – “Ortho-fused” and “ortho- and peri-fused” ring compounds containing hetero atoms are named according to the fusion principle described in Rule A-21 for hydrocarbons. The components are named according to Rules A-21, B-1 and B-2.
How are fused rings numbered?
The system thus oriented is numbered in a clockwise direction commencing with the carbon atom not engaged in ring-fusion in the most counter-clockwise position of the uppermost ring, or if there is a choice, of the uppermost ring farthest to the right, and omitting atoms common to two or more rings.
How do you name fused rings?
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’ .
What are fused heterocyclic compounds?
A compound that can be used as a donor material in organic photovoltaic devices comprising a non-activated porphyrin fused with one or more non-activated polycyclic aromatic rings or one or more non-activated heterocyclic rings can be obtained by a thermal fusion process.
How are heterocyclic compounds numbered?
When naming such compounds the side of the heterocyclic ring is labeled by the letters a, b, c, etc., starting from the atom numbered 1. Therefore side ‘a’ being between atoms 1 and 2, side ‘b’ between atoms 2 and 3, and so on as shown below for pyridine.
What are fused heterocyclic compounds give 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.
How do you number heterocyclic compounds?
How do you number Bicycloalkanes?
The root name is based on the number of C atoms in the ring structures. The prefix bicyclo[x.y.z] is added where x, y and z are the number of atoms in the links as defined below. For substituted bicycloalkanes, the rings are numbered starting at a bridgehead atom and proceeding round the rings, the largest ring first.
What are two fused benzene rings called?
Polycyclic Aromatic Hydrocarbons Naphthalene consists of two benzene rings that are fused together; the resulting molecule is still aromatic, and undergoes the reactions that are typical of benzene itself. Anthracene is a white crystalline solid which exhibits a blue fluorescence under ultraviolet light.
What is fused heterocyclic ring?
2. • Fused heterocycles are systems constructed by. combining two or more rings. • The rings are fused if they are linked in such a way that. each ring has one common bond (fusion bond) to each.
What are fused ring system?
FR-1.2 Fused ring system. A system where each bond is part of a ring; where each ring is ortho-fused (FR-1.1. 1), or ortho- and peri-fused (FR-1.1. 2), to at least one other ring; and where no bond is common to more than two rings is termed a fused ring system.