Which of the following ions derived from`(1,3,5,7)`-cyclooctatetraene `(C_(8)H_(8))` by adding or removing a suitable number of `pi` electrons are aromatic? (i). `C_(8)H_(8)^(2-)` (ii). `C_(8)H_(8)^(+)` (iii). `C_(8)H_(8)^(2+)` (iv). `C_(8)H_(8)^(-)`A. (i),(iii)B. (ii),(iv)C. (ii),(iii),.(iv)D. (i),(ii),(iii)

Which of the following ions derived from`(1,3,5,7)`-cyclooctatetraene

1.	Which of the following ions derived from`(1,3,5,7)`-cyclooctatetraene `(C_(8)H_(8))` by adding or removing a suitable number of `pi` electrons are aromatic? (i). `C_(8)H_(8)^(2-)` (ii). `C_(8)H_(8)^(+)` (iii). `C_(8)H_(8)^(2+)` (iv). `C_(8)H_(8)^(-)`A. (i),(iii)B. (ii),(iv)C. (ii),(iii),.(iv)D. (i),(ii),(iii)
Answer» Correct Answer - 1 `C_(8)H_(8)` has `8pie^(-)s(i.e.,4npie^(-)s)`. By adding `2e^(-)(10pie^(-)s)` or by removing `2e^(-)(6pie^(-)s)`, i.e., `(4n+2)pie^(-)s` it becomes aromatic.