Sec 1 Introduction Properties Hydrocarbon with carbon-carbon double bonds Sometimes called olefins,oil-forming gas” Pi bond is the functional group. More reactive than sigma bond. Bond dissociation energies: C=C BDE 611 kJ/mol C-C BDE -347 kJ/mol Pi bond 264k灯/molSec 1 Introduction & Properties ❖Hydrocarbon with carbon-carbon double bonds ❖Sometimes called olefins, “oil-forming gas” ❖Pi bond is the functional group. ❖More reactive than sigma bond. ❖Bond dissociation energies: ◼C=C BDE 611 kJ/mol ◼C-C BDE -347 kJ/mol ◼Pi bond 264 kJ/mol