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 and its derivatives are mainly used in synthetic organic chemistry. The main source of polynuclear aromatic compounds is coal tar. For example, naphthalene is the largest single constituent (6 - 10%) of coal tar.ince six pi electrons are delocalized over whole ring, therefore the cyclically conjugated double bonds represents by a circle and the carbon-carbon bond length becomes equal. This structure of benzene is called as resonance hybrid of benzene and generally used to represents the benzenemolecule.