Bond angle prediction in molecular geometry relies on the application of Valence Shell Electron Pair Repulsion (VSEPR) theory, which posits that electron domains around a central atom arrange themselves to minimize electrostatic repulsion. The resulting bond angles are determined by the count and type of these domains—specifically bonding pairs versus lone pairs—which dictate specific molecular geometries such as trigonal planar ($120^\circ$), tetrahedral ($109.5^\circ$), bent, or linear ($180^\circ$). Consequently, deviations from idealized angles occur when the greater repulsive force of non-bonding lone pairs compresses the bonding pair angles in geometries like trigonal pyramidal and bent structures.
Bond angle prediction in molecular geometry relies on the application of Valence Shell Electron Pair Repulsion (VSEPR) theory, which posits that electron domains around a central atom arrange themsel…