ORGANIC CHEMISTRY Chapter 4 Zig- Zag geometry of higher alkanes HHH H H HH H Department of Chemistry, Xiamen University
ORGANIC CHEMISTRY Department of Chemistry, Xiamen University Chapter 4 Zig Zag geometry of higher alkanes H H H H H H H H H H H H H H
ORGANIC CHEMISTRY Chapter 4 4.10 The relative stabilities of Cycloalkanes: Ring Strain Department of Chemistry, Xiamen University
ORGANIC CHEMISTRY Department of Chemistry, Xiamen University Chapter 4 4.10 The Relative Stabilities of Cycloalkanes: Ring Strain
ORGANIC CHEMISTRY Chapter 4 4.10 a Heats of combustion(燃烧热) o The heat of combustion of a compound is the enthalpy change for the complete oxidation of the compound CH2CH,CH, CH2 +63O2- 4 Co2+5,O △H=-2877 kJ/mol CH3 9 kJ/mol CH3CHCH3 +6202 4 C02+5 H2O △H=-2868 kJ/mol Department of Chemistry, Xiamen University
ORGANIC CHEMISTRY Department of Chemistry, Xiamen University Chapter 4 4.10A Heats of Combustion (燃烧热) The heat of combustion of a compound is the enthalpy change for the complete oxidation of the compound. CH3CH2CH2CH3 + 612 O2 4 CO2 + 5 H2O ∆H = -2877 kJ/mol CH3CHCH3 CH3 + 612 O2 4 CO2 + 5 H2O ∆H = -2868 kJ/mol 9 kJ/mol 9 kJ/mol
ORGANIC CHEMISTRY Chapter 4 4.10B Heats of Combustion of Cycloalkanes (CH2)n+号nO n co +n Hoo+ heat Cycloalkanes △H CH2 Ring strain Cyclopropane 697.0 115 Cyclobutane 686.0 109 Cyclopentane n34567 664.0 27 Cyclohexane 658.7 Cycloheptane 6624 27 Department of Chemistry, Xiamen University
ORGANIC CHEMISTRY Department of Chemistry, Xiamen University Chapter 4 4.10B Heats of Combustion of Cycloalkanes (CH2)n + 32 nO2 n CO2 + n H2O + heat Cycloheptane 7 662.4 27 Cyclohexane 6 658.7 0 Cyclopentane 5 664.0 27 Cyclobutane 4 686.0 109 Cyclopropane 3 697.0 115 H Ring Strain CH2 Cycloalkanes n
ORGANIC CHEMISTRY Chapter 4 4.11 The Origin of Ring Strain in Cyclopropane and cyclobutane Angle Strain and Torsional Strain Department of Chemistry, Xiamen University
ORGANIC CHEMISTRY Department of Chemistry, Xiamen University Chapter 4 4.11 The Origin of Ring Strain in Cyclopropane and Cyclobutane: Angle Strain and Torsional Strain