Aromatic compounds

Graphene () is a variety of the element carbon which occurs naturally in small amounts. In graphene, the carbon forms a sheet of interlocked atoms as hexagons one carbon atom thick. The result resembles the face of a honeycomb. When many hundreds of graphene layers build up, they are called graphite.

Aspartame is an artificial, non-saccharide sweetener commonly used as a sugar substitute in foods and beverages. It is 200 times sweeter than sucrose, and is a methyl ester of the aspartic acid/phenylalanine dipeptide with brand names NutraSweet, Equal, and Canderel. Discovered in 1965, aspartame was approved by the US Food and Drug Administration (FDA) in 1974 and re-approved in 1981 after its initial approval was briefly revoked.

Triiodothyronine, also known as T3, is a thyroid hormone. It affects almost every physiological process in the body, including growth and development, metabolism, body temperature, and heart rate.

right|thumb|Two different Resonance (chemistry)|resonance forms of benzene (top) combine to produce an average structure (bottom) In organic chemistry, aromaticity is a chemical property describing the way in which a conjugated ring of unsaturated bonds, lone pairs, or empty orbitals exhibits a stabilization stronger than would be expected from conjugation alone. The earliest use of the term was in an article by August Wilhelm Hofmann in 1855. There is no general relationship between aromaticity as a chemical property and the olfactory properties of such compounds.

class of organical compounds whose structure includes at least one cycle of partially unsaturated bonds with delocalized pi electrons all around

distinct arrangement of substituents on aromatic rings

Hexazine (also known as hexaazabenzene) is a hypothetical allotrope of nitrogen composed of 6 nitrogen atoms arranged in a ring-like structure analogous to that of benzene. As a neutrally charged species, hexazine would be the final member of the azabenzene (azine) series, in which all of the methine groups of the benzene molecule have been replaced with nitrogen atoms. The two last members of this series, hexazine and pentazine, have not been observed, although all other members of the azine series have (such as pyridine, pyrimidine, pyridazine, pyrazine, triazines, and tetrazines).

compound containing halogen attached directly to an aromatic ring

chemical compound

chemical compound

(2,4,6-Trimethylphenyl)gold is a member of a special group of compounds where an aryl carbon atom acts as a bridge between two gold atoms. This compound is formed in a reaction between Au(CO)Cl and the Grignard reagent mesitylmagnesium bromide. It crystallizes as a cyclical pentamer.

Cyclooctadeca-1,3,5,7,9,11,13,15,17-nonayne or cyclo[18]carbon is an allotrope of carbon with molecular formula . The molecule is a ring of eighteen carbon atoms, connected by alternating triple and single bonds; thus, it is a polyyne and a cyclocarbon.

chemical compound

Heptazine, or 'tri-s-triazine or cyamelurine', is a chemical compound with formula , that consists of a planar triangular core group or three fused triazine rings, with three hydrogen atoms at the corners. It is a yellow, weakly fluorescent solid with melting point over . It is soluble in organic solvents such as acetonitrile, but is decomposed by water and light.

Homoaromaticity, in organic chemistry, refers to a special case of aromaticity in which conjugation is interrupted by a single sp3 hybridized carbon atom. Although this sp3 center disrupts the continuous overlap of p-orbitals, traditionally thought to be a requirement for aromaticity, considerable thermodynamic stability and many of the spectroscopic, magnetic, and chemical properties associated with aromatic compounds are still observed for such compounds. This formal discontinuity is apparently bridged by p-orbital overlap, maintaining a contiguous cycle of π electrons that is responsible fo

chemical compound

chemical compound

Diarylethene is the general name of a class of chemical compounds that have aromatic functional groups bonded to each end of a carbon–carbon double bond. The simplest example is stilbene, which has two geometric isomers, E and Z.

'''m-Xylylenediamine''' is an organic compound with the formula C6H4(CH2NH2)2. A colorless oily liquid, it is produced by hydrogenation of isophthalonitrile.

Trithiapentalene is an organic bicyclic molecule containing two sulfur heterocycles. Its 10-π aromatic structure is similar to naphthalene. There has been a literature dispute about whether the connectivity among the three sulfur atoms is a case of rapid tautomerization between two valence tautomers or a 3-center 4-electron bond. left|thumb|650x650px|Resonance (chemistry)|Resonance structures of trithiapentalene

Diisopromine or disoprominum, usually as the hydrochloride salt, is a synthetic spasmolytic which neutralizes spastic conditions of the biliary tract and of the sphincter of Oddi. It was discovered at Janssen Pharmaceutica in 1955. It is sold in South Africa under the brand name Agofell syrup as a mixture with sorbitol, and elsewhere as Megabyl.