. A coordination compound has trigonal bipyramidal distribution of hybrid orbitals. What is the type of hybridisation present? a) dsp2 b) sp3 c) sp3 d d) d2 sp3

To determine the type of hybridization in a coordination compound with a trigonal bipyramidal distribution of hybrid orbitals, we need to analyze the geometry and the number of orbitals involved in the hybridization process. In this case, the correct answer is d2sp3.

Understanding Trigonal Bipyramidal Geometry

Trigonal bipyramidal geometry is characterized by five regions of electron density around a central atom. This arrangement consists of three equatorial positions and two axial positions. The angles between the equatorial bonds are 120 degrees, while the angles between the axial and equatorial bonds are 90 degrees.

Identifying the Hybridization

To achieve this geometry, we need to consider the types of atomic orbitals that can combine to form the required five hybrid orbitals. The hybridization process involves the mixing of different types of atomic orbitals:

• d orbitals: Two d orbitals are involved in this case.
• s orbital: One s orbital is used.
• p orbitals: Three p orbitals are combined.

When we combine these orbitals, we get a total of five hybrid orbitals, which is exactly what is needed for a trigonal bipyramidal arrangement. The specific combination is:

• 2 d orbitals
• 1 s orbital
• 3 p orbitals

Conclusion on Hybridization Type

Thus, the hybridization that leads to a trigonal bipyramidal geometry is d2sp3. This type of hybridization is commonly found in coordination compounds where the central atom is typically a transition metal, which has available d orbitals to participate in bonding.

Examples of d2sp3 Hybridization

One classic example of a coordination compound exhibiting d2sp3 hybridization is PF5 (phosphorus pentafluoride). In this compound, phosphorus uses its 3s, 3p, and two 3d orbitals to form five equivalent hybrid orbitals, resulting in the trigonal bipyramidal shape.

In summary, for coordination compounds with a trigonal bipyramidal distribution of hybrid orbitals, the hybridization type is d2sp3, which effectively accommodates the spatial arrangement of the bonds around the central atom. Understanding this concept is crucial for predicting the geometry and properties of various coordination complexes in chemistry.