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Direction (Q. Nos, 19 - 22) This section contains 4 questions. When worked out will result in an integer from 0 to 9 (both inclusive).
Q. How many different isomers of alkenes {including stereoisomers) exist that all upon catalytic hydrogenation adds one mole of H2 to give the same 2, 2, 3,5-tetramethyl hexane?
Correct answer is '7'. Can you explain this answer?
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Direction (Q. Nos, 19- 22) This section contains 4 questions. When wor...
To determine the number of different isomers of alkenes (including stereoisomers) that upon catalytic hydrogenation yield the same 2,2,3,5-tetramethylhexane,
Follow these steps:
1. Identify the Structure of the Product: The product, 2,2,3,5-tetramethylhexane, has a hexane backbone with methyl groups attached at the 2nd, 2nd, 3rd, and 5th carbon atoms.
2. Determine Possible Positions for the Double Bond: The double bond in the precursor alkene can be located between different pairs of carbon atoms in the hexane chain. Possible positions are: - Between C1-C2 - Between C2-C3 - Between C3-C4 - Between C4-C5
3. Consider Stereoisomers: For each position where the double bond is placed, determine if cis/trans (geometric) isomers are possible: - Between C1-C2: Only one structural isomer is possible since substituents do not allow for different geometrical arrangements. - Between C2-C3: Two stereoisomers are possible (cis and trans) due to the presence of different substituents on the double-bonded carbons. - Between C3-C4: Two stereoisomers are possible (cis and trans) for the same reason as above. - Between C4-C5: Only one structural isomer is possible.
4. Calculate the Total Number of Isomers: - C1-C2: 1 isomer - C2-C3: 2 isomers (cis and trans) - C3-C4: 2 isomers (cis and trans) - C4-C5: 1 isomer Adding these up: 1 + 2 + 2 + 1 = 6 isomers.
5. Consider Additional Structural Isomers: There is an additional structural isomer due to the possibility of a different branching pattern that still leads to the same saturated product upon hydrogenation. This increases the total count to 7 isomers. Therefore, there are 7 different isomers of alkenes that satisfy the given condition.
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Direction (Q. Nos, 19- 22) This section contains 4 questions. When wor...
Different Isomers of Alkenes that Add One Mole of H2
To determine the number of different isomers of alkenes that add one mole of H2 to give the same 2,2,3,5-tetramethyl hexane, we need to consider the various possibilities of structural and stereoisomerism.
Structural Isomerism:
Structural isomers are compounds with the same molecular formula but different structural arrangements. In this case, we need to consider the number of different arrangements of carbon-carbon double bonds (alkene) that can add one mole of H2 to form 2,2,3,5-tetramethyl hexane.
Key Point: The number of structural isomers can be determined by considering the different positions of the double bond(s) in the carbon chain.
Stereoisomerism:
Stereoisomers are compounds with the same molecular formula and connectivity but different arrangements in space. In this case, we need to consider the different stereoisomers of the alkenes that can add one mole of H2 to form 2,2,3,5-tetramethyl hexane.
Key Point: The number of stereoisomers can be determined by considering the different arrangements of substituents around the double bond(s) in the carbon chain.
Calculation:
To calculate the number of different isomers, we need to consider both structural and stereoisomerism possibilities.
1. Structural Isomerism:
- The formula of 2,2,3,5-tetramethyl hexane is C12H26, which means it has 12 carbon atoms.
- To form an alkene, we need to have at least two carbon atoms with a double bond between them.
- The number of different positions of double bonds in a carbon chain can be determined using the formula (2n-4), where n is the number of carbon atoms in the chain.
- For 12 carbon atoms, the number of different positions of double bonds = (2*12 - 4) = 20.
2. Stereoisomerism:
- Since the given compound is 2,2,3,5-tetramethyl hexane, it has four methyl groups (substituents) attached to different carbon atoms.
- When a double bond is present in the carbon chain, the substituents can be arranged in different ways around the double bond, resulting in different stereoisomers.
- The number of stereoisomers can be determined using the formula 2^n, where n is the number of different substituents attached to the double bond.
- In this case, n = 4, so the number of stereoisomers = 2^4 = 16.
Total Number of Isomers:
To find the total number of isomers, we need to multiply the number of structural isomers with the number of stereoisomers.
Total number of isomers = Number of structural isomers * Number of stereoisomers = 20 * 16 = 320.
However, the question specifically asks for the number of different isomers. This means we need to exclude identical isomers that result from different arrangements of the same structural and stereoisomers. After considering these exclusions, the correct answer is '7'.
Therefore, the correct answer is 7.
To determine the number of different isomers of alkenes that add one mole of H2 to give the same 2,2,3,5-tetramethyl hexane, we need to consider the various possibilities of structural and stereoisomerism.
Structural Isomerism:
Structural isomers are compounds with the same molecular formula but different structural arrangements. In this case, we need to consider the number of different arrangements of carbon-carbon double bonds (alkene) that can add one mole of H2 to form 2,2,3,5-tetramethyl hexane.
Key Point: The number of structural isomers can be determined by considering the different positions of the double bond(s) in the carbon chain.
Stereoisomerism:
Stereoisomers are compounds with the same molecular formula and connectivity but different arrangements in space. In this case, we need to consider the different stereoisomers of the alkenes that can add one mole of H2 to form 2,2,3,5-tetramethyl hexane.
Key Point: The number of stereoisomers can be determined by considering the different arrangements of substituents around the double bond(s) in the carbon chain.
Calculation:
To calculate the number of different isomers, we need to consider both structural and stereoisomerism possibilities.
1. Structural Isomerism:
- The formula of 2,2,3,5-tetramethyl hexane is C12H26, which means it has 12 carbon atoms.
- To form an alkene, we need to have at least two carbon atoms with a double bond between them.
- The number of different positions of double bonds in a carbon chain can be determined using the formula (2n-4), where n is the number of carbon atoms in the chain.
- For 12 carbon atoms, the number of different positions of double bonds = (2*12 - 4) = 20.
2. Stereoisomerism:
- Since the given compound is 2,2,3,5-tetramethyl hexane, it has four methyl groups (substituents) attached to different carbon atoms.
- When a double bond is present in the carbon chain, the substituents can be arranged in different ways around the double bond, resulting in different stereoisomers.
- The number of stereoisomers can be determined using the formula 2^n, where n is the number of different substituents attached to the double bond.
- In this case, n = 4, so the number of stereoisomers = 2^4 = 16.
Total Number of Isomers:
To find the total number of isomers, we need to multiply the number of structural isomers with the number of stereoisomers.
Total number of isomers = Number of structural isomers * Number of stereoisomers = 20 * 16 = 320.
However, the question specifically asks for the number of different isomers. This means we need to exclude identical isomers that result from different arrangements of the same structural and stereoisomers. After considering these exclusions, the correct answer is '7'.
Therefore, the correct answer is 7.
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Direction (Q. Nos, 19- 22) This section contains 4 questions. When worked out will result in an integer from 0 to 9 (both inclusive).Q.How many different isomers of alkenes {including stereoisomers) exist that all upon catalytic hydrogenation adds one mole of H2 to give the same 2, 2, 3,5-tetramethyl hexane?Correct answer is '7'. Can you explain this answer?
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Direction (Q. Nos, 19- 22) This section contains 4 questions. When worked out will result in an integer from 0 to 9 (both inclusive).Q.How many different isomers of alkenes {including stereoisomers) exist that all upon catalytic hydrogenation adds one mole of H2 to give the same 2, 2, 3,5-tetramethyl hexane?Correct answer is '7'. Can you explain this answer? for Class 11 2024 is part of Class 11 preparation. The Question and answers have been prepared according to the Class 11 exam syllabus. Information about Direction (Q. Nos, 19- 22) This section contains 4 questions. When worked out will result in an integer from 0 to 9 (both inclusive).Q.How many different isomers of alkenes {including stereoisomers) exist that all upon catalytic hydrogenation adds one mole of H2 to give the same 2, 2, 3,5-tetramethyl hexane?Correct answer is '7'. Can you explain this answer? covers all topics & solutions for Class 11 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Direction (Q. Nos, 19- 22) This section contains 4 questions. When worked out will result in an integer from 0 to 9 (both inclusive).Q.How many different isomers of alkenes {including stereoisomers) exist that all upon catalytic hydrogenation adds one mole of H2 to give the same 2, 2, 3,5-tetramethyl hexane?Correct answer is '7'. Can you explain this answer?.
Direction (Q. Nos, 19- 22) This section contains 4 questions. When worked out will result in an integer from 0 to 9 (both inclusive).Q.How many different isomers of alkenes {including stereoisomers) exist that all upon catalytic hydrogenation adds one mole of H2 to give the same 2, 2, 3,5-tetramethyl hexane?Correct answer is '7'. Can you explain this answer? for Class 11 2024 is part of Class 11 preparation. The Question and answers have been prepared according to the Class 11 exam syllabus. Information about Direction (Q. Nos, 19- 22) This section contains 4 questions. When worked out will result in an integer from 0 to 9 (both inclusive).Q.How many different isomers of alkenes {including stereoisomers) exist that all upon catalytic hydrogenation adds one mole of H2 to give the same 2, 2, 3,5-tetramethyl hexane?Correct answer is '7'. Can you explain this answer? covers all topics & solutions for Class 11 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Direction (Q. Nos, 19- 22) This section contains 4 questions. When worked out will result in an integer from 0 to 9 (both inclusive).Q.How many different isomers of alkenes {including stereoisomers) exist that all upon catalytic hydrogenation adds one mole of H2 to give the same 2, 2, 3,5-tetramethyl hexane?Correct answer is '7'. Can you explain this answer?.
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