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basically its an elimination reaction

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Juliet Olson

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2y ago

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Advantage of a wittig synthesis over dehydrohalogenation?

The Wittig reaction has become a popular method for alkene synthesis precisely because of its wide applicability. Unlike elimination reactions (such as dehydrohalogenation of alkyl halides), which produce mixtures of alkene regioisomers determined by Saytzeff's rule, the Wittig reaction forms the double bond in one position with no ambiguity.


When a monohalocarbon reacts with potassium hydroxide?

When a monohalocarbon reacts with potassium hydroxide, it undergoes an elimination reaction called dehydrohalogenation. This reaction results in the removal of a hydrogen halide molecule (HX) from the monohalocarbon, leading to the formation of an alkene.


What are the two methods of preparing alkynes?

There are more than two methods to prepare alkynes, but for example you can do a double elimination reaction by way of E2 (double dehydrohalogenation), a more direct way and using one reaction only you can use KOH @ 200 degrees Celsius for a central alkyne, or NaNH2 @ 150 degrees Celsius for a terminal alkyne.


What is product of dehydrohalogenation of 3 chlorohexane?

Mixture of 2-hexene and 3-hexene


What alkyl halide would yield 1-pentene upon dehydrohalogenation by strong base?

1-bromopentane would yield 1-pentene upon dehydrohalogenation by a strong base like sodium ethoxide or potassium tert-butoxide.


Which of the alkyl chlorides undergoes dehydrohalogenation in the presence of a strong base to give pent-2-ene as the only alkene product?

Which of the alkyl chlorides undergoes dehydrohalogenation in the presence of a strong base to give pent-2-ene as the only alkene product - the choices are: A 2-chloropentane B 1-chloro-2-methylbutane C 1-chloropentane D 3-chloropentane The answer is: 3-chloropentane


Double dehydrohalogenation on an alkane usually requires a very strong base like NaNH2 why is KOH strong enough to do this reaction with stilbene dibromide to obtain diphenylacetylene?

It is possible to make KOH work for the double dehydrohalogenation of an alkane if the base is in a high concentration. If a solvent like triethylene glycol is used, KOH will be less solvated than in solutions of say water, and therefore act as a stronger base.


When ethane is attacked by bromine in the presence of sunlight?

The reaction between ethane and bromine in the presence of sunlight results in the substitution of hydrogen with bromine. This leads to the formation of bromoethane (ethyl bromide) as the product. This kind of reaction is an example of a free radical halogenation reaction.


How do you prepare propene from 1chloropropane?

Propene can be prepared from 1-chloropropane through a dehydrohalogenation reaction. This process typically involves treating 1-chloropropane with a strong base, such as potassium hydroxide (KOH) or sodium ethoxide, which removes the hydrogen chloride (HCl) from the 1-chloropropane molecule. The resulting elimination reaction leads to the formation of propene (C3H6) as a product. This method is commonly carried out in an alcoholic solution to enhance the reaction efficiency.


What is the reaction between alcoholic KOH and alkyl halide?

Alcoholic KOH (potassium hydroxide in alcohol) reacts with an alkyl halide through an elimination reaction called the E2 mechanism to form an alkene. The alkyl halide undergoes deprotonation by the strong base (KOH) and elimination of the halogen atom to generate the alkene product.


How does butene made by 2chlorobutane?

1-Chlorobutane can undergo an E2 elimination reaction with a strong base, such as potassium hydroxide in ethanol, to form butene. The strong base abstracts a proton from the beta-carbon adjacent to the chlorine, resulting in the formation of a double bond and the elimination of HCl. This reaction is also known as dehydrohalogenation.


What happens when 2-bromopentane is treated with alcoholic KOH?

When 2-bromopentane is treated with alcoholic potassium hydroxide (KOH), an elimination reaction occurs, leading to the formation of an alkene. In this case, the reaction typically results in the formation of pent-2-ene as the major product through the dehydrohalogenation process, where the bromine atom and a hydrogen atom from the adjacent carbon are eliminated. The reaction favors the formation of the more substituted alkene due to Zaitsev's rule. Additionally, the use of alcohol as a solvent promotes elimination over substitution.