In which of the following first cation is more stable the second? (1) a & b (2) b & c (3) a & c (4) b & d

Question

In which of the following first cation is more stable the second?

(a) 

(b) 

(c) 

(d) 

(1) \(a \ \& \ b\)

(2) \(b \ \& \ c\)

(3) \(a \ \& \ c\)

(4) \(b \ \& \ d\)

Answer 1

Correct option is:  (1) \(a \ \& \ b\)

(a) 

Due to back bonding I^st is more stable than II.

(b) 

Due to distant electron withdrawing group I^st is more stable than II