arenes benzene Flashcards
what are arenes
hydrocarbons based on benzene
why is benzene stable
it is a six sided ring structure with a special type of bonding which make it stabe
what is the structure of benzene
flat regular hexagon of carbon atoms each which is bonded to a hydrogen atom and then a delocalised electrons in the p orbital
what happens to the 6 carbons
all their delocalised electrons overlap forming an electron density above and below the ring
what length is the c-c bond in benzene
longer than the double bond but shorter than the single bnd
what is the standard state of benzene
colorless liquid at room temperature
why is benzene bp more higher than hexagonal molecules
as they are flat and planar they pack wel so more forces between benzene molecules
how do you name benzene
methyl benzene
how is the structure related to its reactivity
the ring of high electron density can be attacked by electrophiles
the aromatic ring is very stable so energy must be put in to break the ring - delocalisation energy
how do arenes burn with air
with flames that are noticibely smoky
why do arenes produce smokey
they have a higher carbon to hydrogen ratio compared to other alkanes
what is nitration
substitution of a h group with an no2 group
what is nitration important for
making expos
what else is nitration the first step
to making other aromatic amines that can be used in dyes
in fields craft what is aluminium chloride
it acts as a catalyst
