What is a characteristic bond angle for a molecule with sp2 hybridization?

A molecule with sp2 hybridization exhibits a characteristic bond angle of 120 degrees. This hybridization involves the mixing of one s orbital and two p orbitals to form three equivalent sp2 hybrid orbitals. These orbitals are arranged in a trigonal planar geometry, which allows for maximum separation and minimizes electron pair repulsion.

In this geometry, the three sp2 hybrid orbitals orient themselves in a plane at 120 degrees relative to each other. This arrangement is optimal for minimizing repulsive interactions between the electron pairs, leading to the formation of stable molecular structures. Common examples of sp2 hybridized molecules include ethylene (C2H4) and boron trifluoride (BF3), where you can observe this 120-degree bond angle clearly.

Understanding this bond angle is crucial in predicting the geometry and reactivity of organic compounds and certain inorganic molecules.