Question

Kak из Ch3-ch2-cl получить ch2=ch2

Answer 1

Ответ:

Для того чтобы из хлорэтана получить этилен нужно провести реакцию хлорэтана со спиртовым раствором щёлочи.

CH3-CH2Cl + NaOH(спирт) = CH2=CH2 + NaCl + H2O

Answer 2

To convert CH3-CH2-Cl to CH2=CH2, you need to perform a dehydrohalogenation reaction. This reaction involves the removal of a hydrogen atom and a halogen atom (in this case, chlorine) from adjacent carbon atoms, resulting in the formation of a double bond between the two carbon atoms.

One common method to achieve this conversion is by using a strong base, such as sodium ethoxide (NaOCH2CH3) or potassium tert-butoxide (KOtBu). The strong base abstracts the hydrogen atom from the carbon adjacent to the chlorine atom, forming an alkoxide ion. The alkoxide ion then attacks the carbon atom bearing the chlorine, resulting in the elimination of the chlorine atom and the formation of a double bond.

Here is the reaction mechanism:

1. The strong base (e.g., NaOCH2CH3) abstracts a hydrogen atom from the carbon adjacent to the chlorine atom, forming an alkoxide ion (CH3CH2O-).

2. The alkoxide ion attacks the carbon atom bearing the chlorine, resulting in the elimination of the chlorine atom as a chloride ion (Cl-) and the formation of a double bond between the two carbon atoms.

The overall reaction can be represented as follows:

CH3-CH2-Cl + Strong Base → CH2=CH2 + Cl- + Base

It is important to note that the reaction conditions, such as temperature and solvent, can influence the outcome of the reaction. Additionally, the choice of base and reaction conditions may vary depending on the specific requirements of the reaction.

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