Which of the following ligands can show linkage isomerism?

Options

A. `NO_(2)^(-)`
B. `H_(2)overset(cdot cdot)(N)CH_(2)CH_(2)overset(cdot cdot)(N)H_(2)`
C. `H_(2)O`
D. `:NH_(3)`

Answer

A

Explanation

`"NO"_(2)^(-)` can participate in linkage isomerism because it may be bonded to metal through nitrogen or through oxygen, e.g.
`underset("cabalt (III) chloride")underset("Pentamminenitrito-N-")([("NH"_(3))_(5)"CoNO"_(2)]"Cl"_(2))" and "underset("O-cobalt (III) chloride")underset("Pantamminenitrito-")([("NH"_(3))_(5)"CoONO"]"Cl"_(2))`