1. Leon María Elena Larissa
Aromatic chemistry
Vanillin
Leon
María
Elena
Larissa

2. Information History of benzene Ring structure Functional groups
Hückel’s rule
Vanillin

3. History of benzene
BACK
The empirical formula for benzene had been long known, but its highly unsaturated structure was a challenge to determine. Archibald Scott Couper in 1858 and Joseph Loschmidt in 1861 suggested possible structures that contained multiple double bonds or multiple rings, but the study of aromatic compounds was in its earliest years, and too little evidence was then available to help chemists decide on any particular structure.
In 1865, the German chemist Friedrich August Kekulé published a paper in French suggesting that the structure contained a ring of six carbon atoms with alternating single and double bonds
Test

4. History of benzene
Who was the first person to suggest the ring structure for benzene?
Archibald Scott Cooper
Joseph Loschmidt
Friedich August Kekulé
Erich Hükel

5. History of benzene Benzene has a/an ______ structure. Saturated
Unsaturated
Strong
Weak

6. Ring Structure
BACK
The most commonly encountered aromatic compound is benzene. The usual structural representation for benzene is a six carbon ring (represented by a hexagon) which includes three double bonds. Each of the carbons represented by a corner is also bonded to one other atom. In benzene itself, these atoms are hydrogens.
The double bonds are separated by single bonds so we recognize the arrangement as involving conjugated double bonds. An alternative symbol uses a circle inside the hexagon to represent the six π electrons. Each of these symbols has good and bad features.
Test

7. Ring structure
How much carbon does benzene have? 3 4 5 6

8. Ring structure What kind of bonds does benzene have? Single, double
Double, triple
Single, double, triple
Single, triple

9. Functional groups
BACK
In organic chemistry, functional groups are specific groups of atoms or bonds within molecules that are responsible for the characteristic chemical reactions of those molecules.
The atoms of functional groups are linked to each other and to the rest of the molecule by covalent bonds.
Combining the names of functional groups with the names of the parent alkanes generates what is termed a systematic nomenclature for naming organic compounds.
Test

10. Functional groups
What do you have to follow if you want to name an organic compound?
Plain Nomenclature
Normal organic names
Ordinary nomenclature
Systematic nomenclature

11. Hückel’s rule
BACK
A cyclic ring molecule follows Hückel's rule when the number of its π-electrons equals 4n + 2 where "n" is zero or any positive integer, although clear cut examples are really only established for values of n = 0 up to about n = 6.
Aromatic compounds are more stable than theoretically predicted by alkene hydrogenation data; the "extra" stability is due to the delocalized cloud of electrons, called resonance energy.
Test

12. Hückel’s rule What name is given to this formula: (4n+2) Hückel Cooper
BACK
What name is given to this formula: (4n+2)
Hückel
Cooper
Kekulé
August

13. Hückel’s rule
BACK
Following the previous formula (4n + 2) with n = 1, how much molecules does it have? 4 5 6 7

14. Vanillin
Vanillin is a phenolic aldehyde, which is an organic compound with the molecular formula C8H8O3.
Natural "vanilla extract" is a mixture of several hundred different compounds in addition to vanillin. Artificial vanilla flavouring is often a solution of pure vanillin, usually of synthetic origin. Because of the scarcity and expense of natural vanilla extract, synthetic preparation of its predominant component has long been of interest.

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