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Chapter 5: Q40P (page 222)

Which is more stable?

Short Answer

Expert verified

a) 1st compound is more stable.

b) 2nd compound is more stable.

c) 2nd compound is more stable.

Step by step solution

01

Reasons of stability

Among all the compounds, the stability of these alkenes is determined by the numbers of alpha H attached to the alpha carbon along the double bond. The more is the no of alpha H, the more is the stability of that alkene.

02

 Measurement of Stability

If we calculate the no of alpha H along the Double bond, we can identify the stability comparison between them.

So, between these two, the 1st one is more stable.

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Most popular questions from this chapter

Using curved arrows, show the mechanism of the following reaction:

For a reaction carried out at 25°C with an equilibrium constant of 1 × 10−3, in order to increase the equilibrium constant by a factor of 10:

a. How much must ΔG° change?

b. How much must ΔH° change if ΔS° = 0 kcal mol-1 K-1?

c. How much must ΔS° change if ΔH° = 0 kcal mol-1?

Question: Determine the degree of unsaturation for hydrocarbons with the following molecular formulas:

a. C20H34 b. C8H16 c. C12H20 d. C40H56

Question: a. Which of the monosubstituted cyclohexanes in Table 3.9 on p. 128 has a negative ∆G° for the conversion of an axial-substituted chair conformer to an equatorial-substituted chair conformer?

b.Which monosubstituted cyclohexane has the most negative ∆G° for this conversion?

c. Which monosubstituted cyclohexane has the greatest preference for an equatorial position?

d. Calculate ∆G° for the conversion of “axial” methylcyclohexane to “equatorial” methylcyclohexane at 25 °C.

By following the curved red arrows, draw the product(s) of each of the following reaction steps. Also, indicate which species is the electrophile and which is the nucleophile.
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