The structural formulae of five organic compounds are given as follows:
A: CH₃CH₂CH₂CH₃
B: CH₃CH₂COOH
C: CH₃C≡N
D: CH₃CH=CHN
E: CH₃COOCH₃
(i) Give the systematic (IUPAC) names of A, B, C, D and E - Leaving Cert Chemistry - Question 6 - 2001
Question 6
The structural formulae of five organic compounds are given as follows:
A: CH₃CH₂CH₂CH₃
B: CH₃CH₂COOH
C: CH₃C≡N
D: CH₃CH=CHN
E: CH₃COOCH₃
(i) Give the s... show full transcript
Worked Solution & Example Answer:The structural formulae of five organic compounds are given as follows:
A: CH₃CH₂CH₂CH₃
B: CH₃CH₂COOH
C: CH₃C≡N
D: CH₃CH=CHN
E: CH₃COOCH₃
(i) Give the systematic (IUPAC) names of A, B, C, D and E - Leaving Cert Chemistry - Question 6 - 2001
Step 1
Give the systematic (IUPAC) names of A, B, C, D and E.
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Which of the five compounds is an alkane? Give the name or formula of another alkane which is a liquid at room temperature and pressure.
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Answer
A is an alkane. Another example of a liquid alkane at room temperature and pressure is pentane (C₅H₁₂).
Step 3
Which of the five compounds is aromatic? By what name is this compound more commonly known? Write down (a) the molecular formula, (b) the empirical formula of this compound.
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Answer
E is aromatic and is more commonly known as styrene.
Which of the five compounds is a structural isomer of a carboxylic acid? Give the name and structural formula of the acid.
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Answer
B is a structural isomer of propanoic acid. The structural formula is: CH₃COOH.
Step 5
Which of the five compounds can be reduced to a secondary alcohol? How can this reduction be carried out?
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Answer
B can be reduced to a secondary alcohol (isopropanol). This reduction can be carried out using hydrogen in the presence of a catalyst such as palladium or platinum.
Step 6
Which of the compounds can be used to make addition polymers? Draw the structure of one of these polymers showing two repeating units.
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Answer
E (phenylethylene) can be used to make addition polymers. The structure of one of these polymers is:
-C₈H₈-C₈H₈-
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