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Benzene.

Published byAbraham Bennett Modified over 6 years ago

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Presentation on theme: "Benzene."— Presentation transcript:

1 Benzene

2 Index Information Inventors Molecule Bond Quiz

3 Background Michael Faraday Alexander Mitscherlich August Kekulé

4 Michael Faraday He is an Englishman He lived from 1791-1867
Back to index Michael Faraday Back to Background He is an Englishman He lived from His discovery was in 1825, how?: He compressed a coal gas and isolated a colourless, pleasant smelling liquid aka an aromatic compound After many analyses he found out the the amount of carbon atoms equals the amount of hydrogyn atoms

5 Alexander Mitscherlich
Back to index Alexander Mitscherlich Back to background He was a German He lived from His discovery was in 1834 He found out that the formula for Benzene is C6H6 From that he could conclude that it was an unsaturated compound with multiple double bonds (if it only had single bonds, the formula would have been C6H12)

6 August Kekulé He is German He lived from 1829-1896
Back to index Back to background He is German He lived from His discovery was in 1865 He discovered that the structure is cyclic Cyclic is different from circular, cyclic figures have corners, but the endings are connected with each other Idea had flaws and did not explain everything, but why?

7 Molecule bonds Normal alkene reactions Substitution reaction
Back to index Molecule bonds Back to background Back to August Kekulé Normal alkene reactions Substitution reaction In a normal situation, double bonds are shorter than single bonds Benzene has a special thing called “delocalized double bonds” It causes the bond lengths to be the same length, just between the normal single- & double bond lenghts

8 Quiz 1. Who was the first one to discover Benzene? Faraday
Back to index Quiz Back to background 1. Who was the first one to discover Benzene? Faraday Mitscherlich Kekulé Liebig

9 2. What is Benzene’s chemical formula?

10 3. What does Benzene’s structure look like?
Circle Cycle Row Rectangular

11 4. What is the formula for an aromatic compound?

12 5. How many bonds can a carbon atom form?
2 3 4 5

13 Right answer! Question 1 Question 2 Question 3 Question 4 Question 5

14 Wrong answer! Question 1 Question 2 Question 3 Question 4 Question 5

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