Question

Какое вещество не является изомером бутена 2? 1. циклобутан 2.метилпропан 3.этилциклопропан 4.бутен 1

Answer 1

Ответ: 2)метилпропан.
Алканы не изомерны алкенам.

Answer 2

Which substance is not an isomer of butene-2?

The options provided are: 1. Cyclobutane 2. 2-methylpropane 3. Ethylcyclopropane 4. Butene-1

To determine which substance is not an isomer of butene-2, we need to understand the concept of isomerism. Isomers are compounds that have the same molecular formula but different structural arrangements.

Butene-2, also known as 2-butene, has the molecular formula C4H8 and the structural formula CH3CH=CHCH3. It is an alkene with a double bond between the second and third carbon atoms.

Let's analyze each option to see if it is an isomer of butene-2:

1. Cyclobutane: Cyclobutane is a cyclic hydrocarbon with the molecular formula C4H8. It consists of a ring of four carbon atoms. However, it does not have a double bond like butene-2. Therefore, cyclobutane is not an isomer of butene-2.

2. 2-methylpropane: 2-methylpropane, also known as isobutane, has the molecular formula C4H10. It is an alkane with a branched structure. It does not have a double bond like butene-2. Therefore, 2-methylpropane is not an isomer of butene-2.

3. Ethylcyclopropane: Ethylcyclopropane has the molecular formula C6H12. It is a cyclic hydrocarbon with a three-membered ring. It does not have a double bond like butene-2. Therefore, ethylcyclopropane is not an isomer of butene-2.

4. Butene-1: Butene-1, also known as 1-butene, has the molecular formula C4H8 and the structural formula CH2=CHCH2CH3. It is an alkene with a double bond between the first and second carbon atoms. However, it has a different structural arrangement compared to butene-2. Therefore, butene-1 is an isomer of butene-2.

Based on the analysis above, the substance that is not an isomer of butene-2 is cyclobutane.