Arrange the following carbonions in order of their decreasing stabilit

1.	Arrange the following carbonions in order of their decreasing stability. (A)H_3C-C -=C^- , (B)H-C-=C^- , (C )H_3C-CH_2^-
Answer» A gt B gt C B gt A gtC C gt BGT A C gt A gt B Solution :sp-Hybridized carbon is more electronegative than a `sp^3`-hybridized carbon and hence can accommodate the negative charge better. THEREFORE, (A) and (B) are more stable than (C ). Since `CH_3` group has +I -effect, therefore , it intensifies the negative charge and hence destabilizes A relative to B. Thus, the overall stability DECREASES in the ORDER : B gt A gt C

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