Give reason for the following :
'In acylium ion, the structure `R-C -= O^(oplus)` is more stable than `R- overset(oplus) C=O`.

Give reaction for the following : 'In acylium ion, the structure R-C -= O^(oplus) is more stable than R- overset(oplus) C=O .

The shape of (overset(oplus)(C)H_3) is

Explain the following : (a) Why MeNH overset (oplus) CH_2 (I) is more stable more than MeCH_2 overset (oplus) CH_2 (II) when both are 1^@ carbocations ? (b) Which of the following intermediate is unstable ? ( c) Why allylic free radical (CH_2 - CH = CH_2) (I) is more stable than propy1 free radical (dot C H_2 - CH_2 - CH_3) (II) , when both are 1^@ free radicals ? (d) Arrange the following in the decreasing order of their stabilities : ( e) Which of the following resonance structures of p-nitro phenoxide is not feasible ? . (f) Which of the more stable carbocation ? .

The correct order of stabilities of the following resonance structures is : (I) H_2 C = overset (oplus) N = overset (Ө) N (II) H_2 overset (oplus) C - N = overset (Ө) N (III) H_2 overset (Ө) C - overset (oplus) N -= N (IV) H_2 overset (Ө) C - N = overset (oplus) N .

Give reaction for the following : (a) In (III) is more stable than in (I) in aqueous solution. (b) InCl_(3) undergoes disproportionation but InCl does not. ( c) Unlike In^(oplus), Tl^(oplus) is more stable with respect to disproportionation. (d) Ga^(oplus) undergoes disproportionation reaction.

Explain why (CH_3)_3C^(oplus) is more stable than CH_3 overset (oplus) C H_2 and overset (oplus) C H_3 is less stable.

Find the more stable C^(oplus) ?