Ozonolysis of o-xylene yielded three products, glyoxal, 2,3-butanedione and pyruvaldehyde in 3:1:2 ratio. What conclusion can be obtained about the structure of o-xylene from this observation is to be stated. Concept introduction: During ozonolysis double bonds present in compounds gets cleaved to give carbonyl compounds. Each carbon in the double bond gets bonded to an oxygen atom. As the benzene ring can be represented by two different resonance forms during ozonolysis, compounds with substituent groups on the benzene ring yield different products. The final ratio in which different products will be formed can be arrived at by considering the products of the ozonolysis of different resonance forms of the reactant. To state: What conclusion can be obtained about the structure of o-xylene from the observation that upon ozonolysis it yielded three products, glyoxal, 2,3-butanedione and pyruvaldehyde in 3:1:2 ratio.

Question

Using the conditions of spontaneity to deduce the signs of AH and AS Use the observations about each chemical reaction in the table below to decide the sign (positive or negative) of the reaction enthalpy AH and reaction entropy AS. Note: if you have not been given enough information to decide a sign, select the "unknown" option. reaction observations conclusions A This reaction is always spontaneous, but proceeds slower at temperatures above 120. °C. ΔΗ is (pick one) AS is (pick one) ΔΗ is (pick one) B This reaction is spontaneous except above 117. °C. AS is (pick one) ΔΗ is (pick one) This reaction is slower below 20. °C than C above. AS is |(pick one) ? 18 Ar 1

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Question

Chapter 15.SE, Problem 28AP

Interpretation Introduction

Interpretation:

Ozonolysis of o-xylene yielded three products, glyoxal, 2,3-butanedione and pyruvaldehyde in 3:1:2 ratio. What conclusion can be obtained about the structure of o-xylene from this observation is to be stated.

Concept introduction:

During ozonolysis double bonds present in compounds gets cleaved to give carbonyl compounds. Each carbon in the double bond gets bonded to an oxygen atom. As the benzene ring can be represented by two different resonance forms during ozonolysis, compounds with substituent groups on the benzene ring yield different products. The final ratio in which different products will be formed can be arrived at by considering the products of the ozonolysis of different resonance forms of the reactant.

To state:

What conclusion can be obtained about the structure of o-xylene from the observation that upon ozonolysis it yielded three products, glyoxal, 2,3-butanedione and pyruvaldehyde in 3:1:2 ratio.

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