Which of the following will yield 2-methylpentene upon catalytic hydrogenation?
2-methyl-1-pentene
2-methyl-2-pentene
4-methyl-2-pentene
4-methyl-1-pentene
All of the above
The answer is: 2-methyl-2-pentene and 4-methyl-1-pentene. These two compounds have a double bond in their structures, and catalytic hydrogenation will convert the double bond into a single bond, resulting in the formation of 2-methylpentene.
It can either be one of the choice or all of the above
Apologies for the confusion. You are correct. The correct answer is: all of the above. All four compounds listed will yield 2-methylpentene upon catalytic hydrogenation because they all have a double bond that will be converted into a single bond during the reaction. Therefore, all four compounds will undergo the same hydrogenation reaction to produce 2-methylpentene.
To determine which compound will yield 2-methylpentene upon catalytic hydrogenation, we need to consider the characteristics of each compound.
2-methyl-1-pentene: This compound has a double bond between the second and third carbon atoms, which can be hydrogenated to yield a single bond. The resulting compound will have a methyl group on the second carbon, hence yielding 2-methylpentene.
2-methyl-2-pentene: This compound has a double bond between the first and second carbon atoms, which can be hydrogenated to yield a single bond. However, the resulting compound will have a methyl group on the first carbon, not the second. Therefore, it will not yield 2-methylpentene.
4-methyl-2-pentene: This compound has a double bond between the second and third carbon atoms, which can be hydrogenated to yield a single bond. The resulting compound will have a methyl group on the fourth carbon, not the second. Therefore, it will not yield 2-methylpentene.
4-methyl-1-pentene: This compound has a double bond between the first and second carbon atoms, which can be hydrogenated to yield a single bond. The resulting compound will have a methyl group on the fourth carbon, not the second. Therefore, it will not yield 2-methylpentene.
From the above analysis, the only compound that will yield 2-methylpentene upon catalytic hydrogenation is 2-methyl-1-pentene. Therefore, the correct answer is: 2-methyl-1-pentene.
To determine which compound will yield 2-methylpentene upon catalytic hydrogenation, we first need to understand the process of catalytic hydrogenation. Catalytic hydrogenation is a reaction in which unsaturated hydrocarbons (such as alkenes) react with hydrogen gas in the presence of a catalyst (commonly, a metal catalyst like platinum or palladium). This reaction adds hydrogen atoms across the double bond of the alkene, converting it into an alkane.
Now, let's analyze the given compounds:
1. 2-methyl-1-pentene: This compound has a double bond between the first and second carbon atoms. Upon catalytic hydrogenation, the double bond would be saturated with hydrogen to form 2-methylpentane, not 2-methylpentene.
2. 2-methyl-2-pentene: This compound has a double bond between the second and third carbon atoms. Upon catalytic hydrogenation, the double bond would be saturated with hydrogen to form 2-methylpentane, not 2-methylpentene.
3. 4-methyl-2-pentene: This compound has a double bond between the second and third carbon atoms, and it has a methyl group attached to the fourth carbon atom. Upon catalytic hydrogenation, the double bond would be saturated with hydrogen, and the methyl group would remain unchanged, resulting in the formation of 4-methylpentane, not 2-methylpentene.
4. 4-methyl-1-pentene: This compound has a double bond between the first and second carbon atoms, and it has a methyl group attached to the fourth carbon atom. Upon catalytic hydrogenation, the double bond would be saturated with hydrogen, and the methyl group would remain unchanged, resulting in the formation of 2-methylpentene.
Therefore, the correct answer is "4-methyl-1-pentene."