Number of FIF angles less than 90 degree in IF5
FIF Angles in IF5:
- In IF5, the molecule has a trigonal bipyramidal geometry with one lone pair of electrons on the central iodine atom.
- This lone pair causes distortion in the molecule, leading to a deviation from the ideal 90 degree angles in a trigonal bipyramidal structure.
Identifying FIF Angles:
- The FIF angles in IF5 can be classified into two categories: equatorial and axial angles.
- The equatorial angles are the angles between the equatorial atoms and the central iodine atom, while the axial angles are the angles between the axial atoms and the central iodine atom.
FIF Angles less than 90 degrees:
- Due to the lone pair repulsions, the equatorial angles in IF5 are less than 90 degrees.
- The lone pair occupies more space than a bonding pair, leading to compression of the equatorial atoms towards each other and causing the equatorial angles to be less than 90 degrees.
Conclusion:
- In conclusion, all the equatorial angles in IF5 are less than 90 degrees due to the lone pair repulsions, making them FIF angles in the molecule.