11.1A Structure of the carbonyl group 120 1. C-sp* hybridization 2. The bond angles is 120 1200 3. It is a trigonal planar structure 4. The carbon-oxygen double bond 120° consists of sigma-a bond and a pi-bond 120 120 120 Polarization of the T-bond Resonance structures11.1A Structure of the carbonyl group O 120 o 120 o 120 o 1. C-sp 2 hybridization 2. The bond angles is 120 o . 3. It is a trigonal planar structure 4. The carbon-oxygen double bond consists of sigma-a bond and a pi-bond O 120 o 120 o 120 o O O O O  +  − + O- Polarization of the  - bond Resonance structures