An alkene on ozonolysis produces methanal and ethanal.Write the IUPAC name and structure of the alkene.
Answers
Propene gives methanal and ethanal on ozonolysis.
IUPAC name of the alkene is Propene
Structure of the propene is: CH3CH=CH2
Ozonolysis occurs at the position of double bond in an alkene. In this reaction aldehyde or ketone is formed as a product.
Ozone is a very reactive allotrope of oxygen. The reaction of ozone with alkenes causes the oxidative cleaving of the alkene. It is an inorganic molecule. Its chemical formula is O3. Ozone is much less stable than oxygen. Ozone has a bent structure and it is a polar molecule.
Ozonolysis involves the reaction of the compound with ozone leading to the formation of an ozonide, and the ozonide yields on hydrogenation or treatment with acid a mixture containing aldehydes, ketones, or carboxylic acids.
Ozonolysis mechanism occurs under an oxidative cleavage reaction. The ozone is not only responsible for breaking the carbon pi bond but also the carbon-carbon sigma bond. This mechanism involves the attack of ozone on the given reactant to form an ozonide. To eliminate the oxygen content in this intermediate stage, zinc dust is employed though it forms zinc oxide with the oxygen.
Alkenes consists of one pi bond so the double bond of alkenes, when in the presence of the ozone molecule, undergoes oxidative cleavage. Alkenes undergo the process of oxidation resulting in the formation of end products such as ketones, aldehydes, alcohols, or carboxylic acids. The alkene is generally subjected to ozonolysis in the presence of ozone molecules.
Out of the three oxygen atoms that are present in the ozone molecule, one has a positive charge whereas the other has a negative charge. The oxygen atom that is negatively charged will attack one end of the carbon-carbon double bond. The positively charged oxygen atom will attack the other end of the carbon-carbon double bond. A cyclic structure is obtained and is known as molozonide, it is highly unstable.
Carbon atoms are still attached with a single bond. It will then rearrange itself to form a relatively stable intermediate called ozonide. In the ozonide intermediate the bond between two carbon atoms is lost. The carbon atoms in the ozonide intermediate are directly linked via oxygen atoms. Ozonide will then undergo a reduction in the presence of dimethyl sulfide and zinc dust.
Two products are created as the result of the reduction reaction and in both the products, a double bond exists between carbon and oxygen atoms and this refers to the ozonolysis reaction.
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Answer:
Propene gives methanal and ethanal on ozonolysis.
Explanation:
An alkene on ozonolysis produces methanal and ethanal.
IUPAC name of the alkene is Propene
Structure of the propene is: CH3CH=CH2
- Ozonolysis occurs at the double bond location of an alkene. As a byproduct of this process, aldehyde or ketone is produced.
- Ozone is a highly reactive oxygen allotrope. The oxidative cleaving of alkenes occurs when ozone reacts with them. It's a non-organic molecule. It has the chemical formula O3. Ozone is far less stable than oxygen. Ozone is a polar molecule with a bent shape.
- Ozonolysis is the reaction of a chemical with ozone that results in the development of an ozonide, and the ozonide yields a mixture of aldehydes, ketones, or carboxylic acids when hydrogenated or treated with acid.
Alkenes are a type of unsaturated hydrocarbon with carbon and hydrogen atoms in its chemical structure and one or more carbon-carbon double bonds. The presence of one or more double bonds in its structure causes unsaturation. Alkene has the general chemical structure RC=CR'.
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