Number of FIF angles which are less than 90 degree in IF5?

Question

Answer

4 is the correct answer..... as it form octahedral geometry with square pyramidal shape and in octahedral geometry lone pair is at axial position..

Answer

0,sp3d2 hybridisation and bcz of the lone pair presence there will distortion in structure .so there is no 90 degree angle in btw FIF

Answer

Number of FIF angles which are less than 90 degrees in IF5

The molecule IF5, also known as iodine pentafluoride, consists of one iodine atom and five fluorine atoms. To determine the number of FIF angles in IF5 that are less than 90 degrees, we need to examine its molecular geometry and bond angles.

Molecular Geometry of IF5

IF5 adopts a trigonal bipyramidal geometry, where the central iodine atom is surrounded by five fluorine atoms. Three fluorine atoms are arranged in a plane, forming an equatorial plane, while the remaining two fluorine atoms occupy axial positions above and below this plane.

Bond Angles in IF5

The bond angles in IF5 can be categorized into two types: equatorial and axial angles.

Equatorial angles:
- The equatorial fluorine atoms are arranged in a trigonal planar geometry, with bond angles of 120 degrees between each fluorine-iodine bond.
- Since these angles are greater than 90 degrees, they are not considered in the count of FIF angles less than 90 degrees.

Axial angles:
- The axial fluorine atoms are positioned above and below the equatorial plane.
- Each axial fluorine-iodine bond creates an angle with the two adjacent equatorial fluorine-iodine bonds.
- These angles are less than 90 degrees and contribute to the count of FIF angles less than 90 degrees.

Counting the FIF angles less than 90 degrees

To determine the number of FIF angles less than 90 degrees, we need to consider the axial angles in IF5.

- IF5 has two axial fluorine atoms.
- Each axial fluorine atom forms a bond with the central iodine atom and creates an angle with the two adjacent equatorial fluorine atoms.
- Therefore, there are two axial angles in IF5 that are less than 90 degrees.

Conclusion

In conclusion, there are two FIF angles in IF5 that are less than 90 degrees. These angles are formed between the central iodine atom, the axial fluorine atoms, and the adjacent equatorial fluorine atoms. The equatorial angles in IF5 are all greater than 90 degrees and are not considered in the count of FIF angles less than 90 degrees.

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