Fluorene
Fluorene /ˈflʊəriːn/, or 9H-fluorene, is a polycyclic aromatic hydrocarbon. It forms white crystals that exhibit a characteristic, aromatic odor similar to that of naphthalene. It is combustible. It has a violet fluorescence, hence its name. For commercial purposes it is obtained from coal tar. It is insoluble in water and soluble in many organic solvents.
Synthesis, structure, and reactivity
Although fluorene is obtained from coal tar, it can also be prepared by dehydrogenation of diphenylmethane. Alternatively, it can be prepared by the reduction of fluorenone with zinc. The fluorene molecule is nearly planar, although each of the two benzene rings is coplanar with the central carbon 9.
Acidity
The C9-H sites of the fluorene ring are weakly acidic (pKa = 22.6 in DMSO.) Deprotonation gives the stable fluorenyl "anion", nominally C13H9−, which is aromatic and has an intense orange colour. The anion is a nucleophile, and most electrophiles react with it by adding to the 9-position. The purification of fluorene exploits its acidity and the low solubility of its sodium derivative in hydrocarbon solvents.
Podcasts:
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by Leona Lewis
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by Catatonia
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by Beaten Back To Pure
Fly Here Now
by: Leona LewisDoesn't matter what you say
Just tell me what would you do
When I miss you like this baby
Gotta teleport your molecules
give you wings so you can fly
Hi-i-i-i-igh
I'd give you wings so you could fly to me across the sky
I'm tired of talking baby
Say yes or no not maybe
I need your body here with me
(I need your body here with me)
This might sound crazy but
Just fly here right now
Glide like an airplane and
Just fly here right now
There's nothing there to hold you down
there's nobody that's strong enough
Aren't you tired of living on the ground
Well tonight we're going to live it up
Take a trip across the sky
Hi-i-i-i-igh
Spread your wings and fly
This aint a hard decision
Your stronger than jet engines
There's no excuse for you to be
there's no excuse for you to be so far from me
This might sound crazy but
Just fly here right now
Glide like an airplane and
Just fly here right now
People say that we
We can't fly
But we can defy
Gravity tonight we'll fly
People say that we
We can't fly
But we can defy
Gravity
If we can just do something crazy
This might sound crazy but
Just fly here right now
Glide like an airplane and
Just fly here right now
This might sound crazy but
Just fly here right now
Glide like an airplane and