ORGANIC CHEMISTRY Chapter 12 12. 1A Structure of the Carbonyl Group 120°%,8.8 C三0 120 Carbonyl group +-0:H H2C、+ -O Resonance structures for H2C Formaldehyde the carbonyl group Acetone H=2.27D =28D Department of Chemistry, Xiamen UniversityORGANIC CHEMISTRY Department of Chemistry, Xiamen University Chapter 12 12.1A Structure of the Carbonyl Group C O δ+ δ− sp2 Carbonyl group 120 120 C O C O Resonance structures for the carbonyl group C O H H C O H3C H3C Formaldehyde Acetone µ = 2.27 D µ = 2.88 D