Question

Find out the correct order for the energy required for heterolytic cleavage of indicated c-br bonds

Answer 1

In this case we can see that one of the atoms carry a negative charge after bond cleavage indicating that it has both the electrons of the bond and the other has no electrons at all. Hence it is electron deficient thus positively charged.  As the electrons are not divided equally after bond cleavage this is called Heterolytic Fission. In a case the C atom carries a positive charge it is called a carbocation and in the case it carries both the electrons of the broken bond and is negatively charged, it is quite intuitively called a Carbanion. Carbocation and Carbanions are the most important carbon intermediates in organic chemistry and hence warrant further discussion.

Please note that both types of fissions are applicable to  both homoatomic and heteroatomic bonds (bonds between two different atoms say C-N or C-O).  Now let us discuss the three intermediates we talked about in some detail.

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