OSF2 is the species having a pyramidal shape
- Explanation:
- Structure: OSF2 (osmium difluoride) has a pyramidal molecular geometry. It consists of one osmium atom (O) in the center bonded to two fluorine atoms (F) and one oxygen atom (O) on one side. The oxygen atom occupies the apical position, giving the molecule a pyramidal shape.
- Electron Pair Arrangement: The central osmium atom in OSF2 has 5 electron pairs, out of which 4 are bonding pairs (2 with each fluorine atom) and 1 is a lone pair on the oxygen atom. This lone pair causes the distortion of the molecule into a pyramidal shape.
- Hybridization: The osmium atom in OSF2 undergoes sp3 hybridization, where one s orbital and three p orbitals combine to form four sp3 hybrid orbitals. These hybrid orbitals are then used to form bonds with the surrounding atoms, resulting in the pyramidal structure.
- Comparisons:
- SO2 (sulfur dioxide) has a bent shape.
- BrF3 (bromine trifluoride) has a T-shaped structure.
- SiO2-3 (trioxide ion) has a trigonal planar shape.
In conclusion, OSF2 stands out among the given options as the species with a pyramidal shape due to its molecular geometry, electron pair arrangement, and hybridization characteristics.