L5 Aromatic hydrocarbons Flashcards
what is benzene’s molecular formula?
C6H6
who isolated benzene and when?
Michael faraday in 1825
from where he isolated it?
from gases given of when whale oil or coal is heated
properties of benzene?
- unreactive
- very stable
- good organic solvent
kekule structure of benzene?
hexagon of carbon atoms with alternating single and double bonds
who explained benzene’s lack of energy and what was his theory?
Linus pauling- proposed a theory that the electrons that makes the second bond in a double bond is delocalized which means they are shared among all the six carbons in the ring which makes benzene stable
what do the circle in the middle of hexagon symbolize?
the cloud formed by the three electron pairs
what do aromatic compounds mean?
organic compounds that contain benzene rings as part as their structures
what do aliphatic compounds mean?
hydrocarbons such as alkanes, alkenes, and alkynes
where do aliphatic compounds are obtained from?
from heating animal fats
where do benzene-related compounds were found in the past?
pleasant smelling oils that came from fruits, spices and other plant parts.
Naphthalene is used for what and an example of what?
to make dyes and as moth repellent
example of fused-ring system
Anthracene is used for what?
to produce dyes and pigments
Phenanthrene is ?
present in the atmosphere due to the incomplete combustion of hydrocarbons
Xylene is used for what?
to make polyester fibers and fabrics
