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In π (pi) bond formation, one of the below criteria is necessary. Choose the appropriate one?
  • a)
    pentagonal orientation of the two p orbitals on adjacent atoms
  • b)
    parallel orientation of the two p orbitals on adjacent atoms
  • c)
    planar orientation of the two p orbitals on adjacent atoms
  • d)
    trigonal orientation of the two p orbitals on adjacent atoms
Correct answer is option 'B'. Can you explain this answer?
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In π (pi) bond formation, one of the below criteria is necessary. Cho...
Parallel orientation of p orbitals on adjacent atoms is necessary for side-ways overlapping and formation of ππ bond.
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In π (pi) bond formation, one of the below criteria is necessary. Cho...
Answer:

The appropriate criterion for π (pi) bond formation is the parallel orientation of the two p orbitals on adjacent atoms (option B). Let's understand why this is the correct answer.

Explanation:

When two atoms come close together to form a bond, their atomic orbitals overlap to create a bonding molecular orbital. In the case of π bonds, the overlap occurs between the p orbitals of adjacent atoms.

Pi Bond Formation

To form a π bond, the following steps occur:

1. Formation of σ bond: Initially, a sigma (σ) bond is formed when the overlapping s or p orbitals of two atoms come together end-to-end. This results in the sharing of electrons along the axis connecting the two nuclei.

2. Formation of π bond: After the formation of the sigma bond, the unhybridized p orbitals on the adjacent atoms come close together. The p orbitals must have a parallel orientation to overlap effectively. The parallel orientation allows the side-to-side overlap of the p orbitals, resulting in the formation of a π bond.

Other Criteria:

Let's analyze the other options and understand why they are not the appropriate criteria for π bond formation:

a) Pentagonal orientation: Pentagonal orientation refers to the arrangement of atoms in a pentagon. This is not a necessary criterion for π bond formation as the orientation of the p orbitals is more important.

c) Planar orientation: Planar orientation refers to the alignment of the p orbitals in the same plane. While this is often observed in molecules, it is not a necessary criterion for π bond formation. The key requirement is the parallel orientation of the p orbitals.

d) Trigonal orientation: Trigonal orientation refers to the arrangement of atoms in a trigonal shape. Similar to pentagonal orientation, this is not a necessary criterion for π bond formation.

Conclusion:

In conclusion, the appropriate criterion for π bond formation is the parallel orientation of the two p orbitals on adjacent atoms. This allows for effective side-to-side overlap of the p orbitals, resulting in the formation of a π bond.
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In π (pi) bond formation, one of the below criteria is necessary. Choose the appropriate one?a)pentagonal orientation of the two p orbitals on adjacent atomsb)parallel orientation of the two p orbitals on adjacent atomsc)planar orientation of the two p orbitals on adjacent atomsd)trigonal orientation of the two p orbitals on adjacent atomsCorrect answer is option 'B'. Can you explain this answer?
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