Question

when does bond cleavage happen and whyy..?? ​

Answer 1

Answer:

Heterolytic cleavage is the cleavage of a covalent bond between two species A and B such that after cleavage one of the atoms acquires positive charge, and the other negative charge. In organic chemistry, heterolytic cleavage of a covalent bond containing carbon in a reaction occurs only under some specific conditions.

Answer 2

Answer:

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Explanation:

Bond cleavage, or bond fission, is the splitting of chemical bonds. This can be generally referred to as dissociation when a molecule is cleaved into two or more fragments.

In general, there are two classifications for bond cleavage: homolytic and heterolytic, depending on the nature of the process. The triplet and singlet excitation energies of a sigma bond can be used to determine if a bond will follow the homolytic or heterolytic pathway.A metal−metal sigma bond is an exception because the bond's excitation energy is extremely high, thus cannot be used for observation purposes.

In some cases, bond cleavage requires catalysts. Due to the high bond-dissociation energy of C−H bond, around 100 kcal/mol (420 kJ/mol), a large amount of energy is required to cleave the hydrogen atom from the carbon and bond a different atom to the carbon.