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Questions and Answers
What does 'haem-' or 'hem-' mean?
What does 'haem-' or 'hem-' mean?
Which medical condition is associated with an inherited tendency to bleeding?
Which medical condition is associated with an inherited tendency to bleeding?
What does 'haemolysis' refer to in medical terms?
What does 'haemolysis' refer to in medical terms?
What type of substitution is represented by the given reaction?
What type of substitution is represented by the given reaction?
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What does the Kekulé structure suggest about the carbon-carbon bonds in benzene?
What does the Kekulé structure suggest about the carbon-carbon bonds in benzene?
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Why can't the two forms (Kekulé structures) of benzene be separated?
Why can't the two forms (Kekulé structures) of benzene be separated?
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What is the nature of benzene's bonds according to the text?
What is the nature of benzene's bonds according to the text?
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Why are addition reactions difficult to occur in benzene?
Why are addition reactions difficult to occur in benzene?
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Study Notes
Aromaticity and Aromatic Compounds
- Historically, compounds with pleasant odors, such as benzaldehyde and Eugenol, were considered aromatic because they contained a benzene ring.
- However, as chemists synthesized more compounds with benzene rings, they found that not all of them had a pleasant odor, such as benzoic acid and aspirin.
Benzene
- Benzene (also known as phene) is an organic compound with the formula C6H6.
- It was first isolated by Faraday in 1825.
- In 1845, Hofmann found benzene in coal-tar, which remains a source of benzene and its derivatives.
Reactions of Benzene
- Initially, scientists expected benzene to react like an unsaturated hydrocarbon, but experiments proved otherwise.
- Benzene does not react like an unsaturated hydrocarbon in addition reactions and oxidation reactions.
- Instead, benzene reacts in its own unique way, which is distinct from other unsaturated hydrocarbons.
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Description
Test your knowledge of medical terms with the prefix 'haem-', which relates to blood. Explore the meanings and applications of words like haematology, haemophilia, haemorrhage, and more.
