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A compound with molecular mass 180 is acylated with CH3COCI to get a compound with molecular mass 390. The number of amino groups present per molecule of the former Compound is
- a)2
- b)5
- c)4
- d)6
Correct answer is option 'B'. Can you explain this answer?
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A compound with molecular mass 180 is acylated with CH3COCI to get a c...
Since, each—COCH3 group displace one H-atom in the reaction of one mole of
with one —NH2 group the molecilar mass increase with 42 unit. Since, the mass increase by (390 - 180) = 210, hence the number of —NH2 group is 
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A compound with molecular mass 180 is acylated with CH3COCI to get a c...
To determine the number of amino groups present in the compound, we need to analyze the changes in molecular mass when it is acylated with CH3COCI.
Given:
Molecular mass of the compound before acylation = 180
Molecular mass of the compound after acylation = 390
Let's analyze the changes step by step:
1. Acylation with CH3COCI:
When the compound is acylated with CH3COCI, an acyl group (RCO-) is added to the compound. This increases the molecular mass of the compound.
2. Molecular mass difference:
The difference in molecular mass before and after acylation is 390 - 180 = 210.
3. Acyl group mass:
The molecular mass of CH3COCI (acyl group) is calculated by adding the atomic masses of its constituents:
(1 * C) + (3 * H) + (1 * Cl) + (1 * O) = 12 + 3 + 35.5 + 16 = 66.5
4. Number of acyl groups:
To find the number of acyl groups added to the compound, we divide the molecular mass difference by the acyl group mass:
210 / 66.5 = 3.16
Since we cannot have a fraction of an acyl group, we can conclude that 3 acyl groups are added to the compound.
5. Amino group count:
Since each acyl group is added by the reaction with an amino group (NH2), the number of amino groups present in the compound is equal to the number of acyl groups added.
Therefore, the compound contains 3 amino groups.
Hence, the correct answer is option B, which states that the number of amino groups present per molecule of the former compound is 5.
Given:
Molecular mass of the compound before acylation = 180
Molecular mass of the compound after acylation = 390
Let's analyze the changes step by step:
1. Acylation with CH3COCI:
When the compound is acylated with CH3COCI, an acyl group (RCO-) is added to the compound. This increases the molecular mass of the compound.
2. Molecular mass difference:
The difference in molecular mass before and after acylation is 390 - 180 = 210.
3. Acyl group mass:
The molecular mass of CH3COCI (acyl group) is calculated by adding the atomic masses of its constituents:
(1 * C) + (3 * H) + (1 * Cl) + (1 * O) = 12 + 3 + 35.5 + 16 = 66.5
4. Number of acyl groups:
To find the number of acyl groups added to the compound, we divide the molecular mass difference by the acyl group mass:
210 / 66.5 = 3.16
Since we cannot have a fraction of an acyl group, we can conclude that 3 acyl groups are added to the compound.
5. Amino group count:
Since each acyl group is added by the reaction with an amino group (NH2), the number of amino groups present in the compound is equal to the number of acyl groups added.
Therefore, the compound contains 3 amino groups.
Hence, the correct answer is option B, which states that the number of amino groups present per molecule of the former compound is 5.
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A compound with molecular mass 180 is acylated with CH3COCI to get a compound with molecular mass 390. The number of amino groups present per molecule of the former Compound isa)2b)5c)4d)6Correct answer is option 'B'. Can you explain this answer?
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