Concept explainers
(a)
Interpretation:The strain energy determined in prismane should be compared to two three membered and three four membered rings.
Concept introduction:Ring strain is a kind of instability that results when bonds deviate from ideal bond-angle. The cyclic system have different amount of strain as illustrated below:
It is evident that three and four membered small ring systems have considerable degree of angular and ring strain that leads to their instability. Therefore it can be concluded that as one moves to higher order cycloalkanes, ring size expands and strain diminishes.
(b)
Interpretation:The estimated strain energy released when one side of three membered ring is broken should be determined.
Concept introduction:Ring strain is a kind of instability that results when bonds deviate from ideal bond-angle. The cyclic system have different amount of strain as illustrated below:
It is evident that three and four membered small ring systems have considerable degree of angular and ring strain that leads to their instability. Therefore it can be concluded that as one moves to higher order cycloalkanes, ring size expands and strain diminishes.
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Organic Chemistry: Structure and Function
- (b) Study the following themochemical data very carefully: Ciz(g) - 2ci(g) I2(g) IC(g) - 1(g) + CI(g) I2(s) → 12(g) AH° = 242.3 kJ AH° = 151.0 kJ 21(g) AH° = 211.3 kJ AH° = 62.8 kJ I2(s) reacts with Cl2(g) to produce ICI(g). Write the chemical equation to produce ONLY one mole of ICI(g) (i) Calculate AH° for the reaction of I2(s) with Cl2(g) to form 1 mole of ICI(g). Use all the data given above. (ii) What law did you use to calculate AH° above? (iii) What are the names of the following processes? I2(s) → 12(g) I2(g) 21(g) ICI(g) I(g) + Cl(g)arrow_forwardWhat is the heat of combustion of ethane, C₂H, in kilojoules per mole of ethane? Enthalpy of formation values can be found in this list of thermodynamic properties. AH = kJ/mol ethanearrow_forwardGiven the following data: 4C(s) + 4H2(g) + O2(g) → CH3CH2OCOCH3(l) ΔH°=-480.0 kJ CH3CH2OH(l) + O2(g) → CH3COOH(l) + H2O(l) ΔH°=-492.0 kJ 2C(s) + 3H2(g) + 1/2O2(g) → CH3CH2OH(l) ΔH°=-278.0 kJ H2(g) + 1/2O2(g) → H2O(l) ΔH°=-286.0 kJ calculate ΔH° for the reaction:CH3COOH(l) + CH3CH2OH(l) → CH3CH2OCOCH3(l) + H2O(l)arrow_forward
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- Chemistry: The Molecular ScienceChemistryISBN:9781285199047Author:John W. Moore, Conrad L. StanitskiPublisher:Cengage Learning