Difference Between Benzenoid and Non Benzenoid

Thekey differencebetween benzenoid and non benzenoid compounds is thatbenzenoid compounds contain at least one苯分子中的环，而非苯烷化合物没有苯环。

An aromatic compound is a cyclic, planar molecule with a ring of resonance bonds. These structures are more stable than normal ring structures. Both benzenoid and non benzenoid compounds arearomatic compounds. Therefore, all aromatic compounds are not necessarily benzenoid compounds.

CONTENTS

1.Overview and Key Difference
2.What is Benzenoid
3.What is Non Benzenoid
4.Similarities Between Benzenoid and Non Benzenoid
5.Side by Side Comparison – Benzenoid vs Non Benzenoid in Tabular Form
6.概括

What is Benzenoid

Benzenoid compounds are molecules that have at least one benzene ring in its chemical structure. A benzene ring is a cyclic structure having six carbon atoms as the ring members. It has three pi bonds (double bonds) and threesigma bondsarranged in an alternative pattern. Therefore, we call this pattern aconjugated pi system.

Since the molecule has double bonds due to benzene ring, the molecule is an unsaturated compound with extra stability provided by the conjugated pi system.

What is Non Benzenoid?

非苯苯二甲酸化合物是芳族分子，其化学结构中没有苯环。尽管不存在苯环，但这些分子具有共轭PI系统。这些化合物的环结构具有约5-7个碳原子。

The aromatic nature arises due to the presence of conjugated pi system. This conjugated pi system provides the molecule with extra stability. Some common examples include azulenes, Oxaazulanones, Pentafulvene, Tropones & Tropolones, etc.

What are the Similarities Between Benzenoid and Non Benzenoid?

• Both are cyclic structures
• Benzenoid and Non Benzenoid are aromatic compounds with conjugated pi systems
• Both Benzenoid and Non Benzenoid exhibit an extra stability

What is the Difference Between Benzenoid and Non Benzenoid?

Although both benzenoid and non benzenoid compounds are aromatic compounds, they have few differences between them. The difference is the presence of a benzene ring in these two compounds. In benzenoid compounds there are benzene rings present that gives cause to its name whereas a benzene ring is absent in non benzenoid compounds. These structural differences definitely affect the chemical properties and reactivity of these compounds.

概括– Benzenoid vs Non Benzenoid

Both benzenoid and non benzenoid compounds are aromatic structures having a conjugated pi system. Therefore, both these structures show extra stability. The difference between benzenoid and non benzenoid compounds is that benzenoid compounds contain at least one benzene ring in the molecule whereas non benzenoid compounds have no benzene rings.

Reference:

1.“非苯型芳香族化合物”。曼尼希意图ction | Mannich Reaction Mechanism |[电子邮件保护]Available here
2. “Aromaticity.” Wikipedia, Wikimedia Foundation, 6 June 2018.Available here

Image Courtesy:

1.’Toluene 200’By Emeldir (talk) – Own work, (Public Domain) viaCommons Wikimedia
2.’Azulene struttura’By Paginazero – mio disegno, (Public Domain) viaCommons Wikimedia