Differentiate alpha, beta and gama-elimination reaction
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(I) α-elimination reactions or 1,1-elimination reactions: A reaction in which both the groups or atoms are removed from the same carbon of the molecule is called α-elimination reaction. This reaction is mainly given by gem dihalides and gem trihalides having at least one α-hydrogen.
Product of the reaction is halocarbenes or dihalocarbenes. which are key intermediates in a wide variety of chemical and photochemical reactions.
(II) β-elimination reactions or 1, 2-elimination reactions: A reaction in which functional group (i.e., leaving group) is removed from α-carbon and other group (Generally hydrogen atom) from the β-carbon is called β-elimination reaction. In this reaction there is loss of two σ bonds and gain of one π bond. Product of the reaction is generally less stable than the reactant.
(lll)γ-elimination reaction : A reaction in which elimination takes place at α-carbon and γ- carbon.
The results of carrying out the γ-elimination reaction in 99.5% 2H2O show that 80% of the hydrogen which replaces succinate in the γ position originates not in the solvent but in some part of the substrate molecule. The enzyme catalyzes a rapid exchange of hydrogen between cystathionine and water, a finding which precluded studies of the fate of hydrogen during the γ-replacement of succinate by cysteine.
Thanks.
Here is your answer.
(I) α-elimination reactions or 1,1-elimination reactions: A reaction in which both the groups or atoms are removed from the same carbon of the molecule is called α-elimination reaction. This reaction is mainly given by gem dihalides and gem trihalides having at least one α-hydrogen.
Product of the reaction is halocarbenes or dihalocarbenes. which are key intermediates in a wide variety of chemical and photochemical reactions.
(II) β-elimination reactions or 1, 2-elimination reactions: A reaction in which functional group (i.e., leaving group) is removed from α-carbon and other group (Generally hydrogen atom) from the β-carbon is called β-elimination reaction. In this reaction there is loss of two σ bonds and gain of one π bond. Product of the reaction is generally less stable than the reactant.
(lll)γ-elimination reaction : A reaction in which elimination takes place at α-carbon and γ- carbon.
The results of carrying out the γ-elimination reaction in 99.5% 2H2O show that 80% of the hydrogen which replaces succinate in the γ position originates not in the solvent but in some part of the substrate molecule. The enzyme catalyzes a rapid exchange of hydrogen between cystathionine and water, a finding which precluded studies of the fate of hydrogen during the γ-replacement of succinate by cysteine.
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