Which ONE of the following reactions is NOT correct? |...

Name: Problem 117, Chapter 4: Advanced Problems in Organic Chemistry for Competitive Examinations
Uploaded: 2021-09-07T03:17:02-08:00
Duration: 7 min 36 s
Channel: Preeti Kumari
Description: Which ONE of the following reactions is NOT correct?

Key Concepts

Chemical Reaction Balancing

This concept involves ensuring that the number of atoms for each element is the same on both sides of a chemical equation. In evaluating reaction correctness, one must check that the equation is balanced in terms of both mass and charge, which is essential for conforming with the law of conservation of mass.

Reaction Feasibility

This refers to the assessment of whether a given reaction can occur under the specified conditions. It includes considerations such as reaction thermodynamics, kinetics, and the practicality of the reaction pathway, all of which determine if the reaction is chemically plausible.

Reaction Mechanism

Understanding the step-by-step sequence through which reactants transform into products is key to identifying potential errors in a reaction's formulation. Analysis of the reaction mechanism allows one to evaluate if intermediate steps and transition states are realistic and support the overall reaction.

Stoichiometry

Stoichiometry involves the quantitative relationships between reactants and products in a chemical reaction. Checking stoichiometric coefficients and the relationships between amounts ensures that the reaction is represented accurately, which is crucial for determining the reaction’s correctness.

Transcript

00:02 In this problem, we have given 4 reactions and we have to find which one of the following reaction is not correct.

00:12 In reaction a, an unsaturated alcohol reacts with br2 and forms a slightly compound this and its enanceumor.

00:53 In reaction b, an alkene reacts with h2 -saf4 in the presence of h2o to give a give alcohol.

01:24 In reaction c, a vinyl chloride react with hcl and give a decent reaction forming an enantiomer pair.

01:53 In reaction d, again unsaturated alcohol react with borane followed by oxidation in the presence of base and it gives alcohol.

02:32 We know that.

02:37 Terminal alkyne on reaction with vh3 followed by oxidation give primary alcohol therefore this reaction is incorrect here should be an hydroxy group because this alkyne gets converted into primary alcohol so in this product oh is missing at this position therefore this reaction is not correct in reaction c if the addition of hcl is done, we know that addition of hx with alken follows marconikov's addition reaction in which negative part of addendum, this is cl minus negative part of addendum, goes to that doubly wanted carbon atom which contains lesser number of hydrogen.

03:52 We know that this carbon atom does not contain any hydrogen, so chlorine should be attached at this position, not here.

04:05 So this reaction is also not correct and the correct product for this reaction is gm dihylide.

04:27 This is correct product.

04:42 Now here alkyne undergoes hydration reaction...

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