4π-bonds 4 \pi \text {-bonds }4π-bonds
2π-bonds and 2σ-bonds 2 \pi \text {-bonds and } 2 \sigma \text {-bonds }2π-bonds and 2σ-bonds
1π-bond and 3σ-bonds 1 \pi \text {-bond and } 3 \sigma \text {-bonds }1π-bond and 3σ-bonds
4σ-bonds 4 \sigma \text {-bonds }4σ-bonds