arctan - the inverse function of the tangent; the angle that has a tangent equal to a given number. arc tangent, arctangent, inverse tangent. circular function, trigonometric function - function of an angle expressed as a ratio of the length of the sides of right-angled triangle containing the angle.
Best Answer: Benzene is a molecule (C6 H6) that has six carbons and six hydrogens in a conjugated system (alternating double bonds). The conjugated double bonds make Benzene aromatic.Aromatic describes conjugated ring systems (rings that feature a double bond for every other Carbon-Carbon bond such as seen with Benzene). However, aromatic rings can feature more than 6 carbons. Benzene is an example of an aromatic compound.Phenyl is usually used in the term Phenyl group. You can think of a phenyl group as what you call Benzene when it is a functional group for a larger molecule (or a substituent). One of benzene's hydrogens is replaced by the attachment of a more complex molecule.Source(s): One year college organic chemistry.henyl is usually used in the term Phenyl group. You can think of a phenyl group as what you call Benzene when it is a functional group for a larger molecule (or a substituent). One of benzene's hydrogens is replaced by the attachment of a more complex molecule. Source(s): One year college organic chemistry.
Benzene, C 6 H 6, is the simplest aromatic hydrocarbon, and it was the first one named as such. The nature of its bonding was first recognized by August Kekule kekulÃ© in the 19th. centuryn aromatic substitution one substituent on the arene ring, usually hydrogen, is replaced by another substituent. The two main types are electrophilic aromatic substitution when the active reagent is an electrophile and nucleophilic aromatic substitution when the reagent is a nucleophile.