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In the organic reaction by fission of bond, which intermediate species from? Write species and explain their stability |
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Answer» Solution :In organic compound the covalent bond PRESENT between atoms. During organic reaction the fission of covalent bond is take place. In the fission of bond the displacement of electron is according to central atom and in these three type of intermediate from (a) heterolytic fission one carbocation or carbanion FORM (b) In homolytic fission, a free radical form (a) (i) Carbocation: In it the (+1) positive charge present on carbon. e.g `{:(overset(+)(CH_(3)),lt,CH_(3)overset(+)(CH_(2)),lt,(CH_(3))_(2) overset(+)(CH) ,lt(CH_(3))_(3)overset(+)(C )),(1^(@),,1^(@),lt,2^(@),lt 3^(@)):}` (ii) Carbanions: Chemical species bearing a negative charge on carbon. Like carbon of carbocation in carbocation three covalent bond but carbanion carbon posses eight electron `H_(3)baroverset(..)(C), H_(3)C baroverset(..)(C) H_(2), (H_(3)C)_(2) baroverset(..)(C)H, (CH_(3))_(3) bar(C )`: ETC. are carbanions. Its stability order METHYL `GT 1^(@) gt 2^(@) gt 3^(@)`. (b) Free radical: The free radicals produced by homolytic cleavage of a covalent bonds. In free radical the one electron present on atom. `overset(.)(C )H_(3), CH_(3) overset(.)(C )H_(2), (CH_(3))_(2) overset(.)( C)H, (CH_(3))_(3) overset(.)(C )` etc. are free radicals the stability order of free radicals is `1^(@) lt 2^(@) lt 3^(@)`. means- `overset(.)(CH_(3)) lt CH_(3) overset(.)(CH_(2)) lt (CH_(3))_(2) overset(.)(CH) lt (CH_(3))_(3) overset(.)(C )` |
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