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A secondary amine has two carbon atoms directly bonded to the nitrogen atom - Scottish Highers Chemistry - Question 12 - 2019
Question 12
A secondary amine has two carbon atoms directly bonded to the nitrogen atom. Which of the following is a secondary amine? A B C D
Worked Solution & Example Answer:A secondary amine has two carbon atoms directly bonded to the nitrogen atom - Scottish Highers Chemistry - Question 12 - 2019
Step 1
Identify the structure of a secondary amine
Answer
A secondary amine is defined as an amine in which the nitrogen atom is bonded to two carbon atoms. This means we need to look for a structure where the nitrogen atom is attached to exactly two carbons, and the other two bonds of nitrogen are with hydrogen atoms.
Step 2
Analyze each option
Answer
Now, let's analyze the given structures:
- A: This structure shows the nitrogen atom bonded to one carbon and one hydrogen, which does not meet the criteria for a secondary amine.
- B: This structure illustrates the nitrogen atom bonded to two carbon atoms and one hydrogen atom, fitting the definition of a secondary amine. This is the correct answer.
- C: This option shows nitrogen bonded to three carbon atoms, which defines a tertiary amine, not a secondary one.
- D: Here, the nitrogen is bonded to two carbons but is also connected to a cyclic structure; however, doesn't meet the secondary criteria as there are too many hydrogens.
Thus, only option B is a secondary amine.