Q. Which of the following complex ion is expected to absorb visible light?
Coordination Compounds
Solution:
$\left[ Sc \left( H _{2} O \right)_{3}\left( NH _{3}\right)_{3}\right]^{3+}$
$\left[ Ti ( en )_{2}\left( NH _{3}\right)_{2}\right]^{4+}$
$\left[ Cr \left( NH _{3}\right)_{6}\right]^{3+}$
$\left[ Zn \left( NH _{3}\right)_{6}\right]^{+2}$
x = +3
x =+4
x = +3
x= +2
d electrons = 0
d electrons = 0
d electrons = 3
d electrons = 10
$\therefore $ No absorption
of visible light
$\therefore $ No absorption
of visible light
$\therefore $ complex ion is expected to absorb visible light
$\therefore $ No absorption of visible light.
| $\left[ Sc \left( H _{2} O \right)_{3}\left( NH _{3}\right)_{3}\right]^{3+}$ | $\left[ Ti ( en )_{2}\left( NH _{3}\right)_{2}\right]^{4+}$ | $\left[ Cr \left( NH _{3}\right)_{6}\right]^{3+}$ | $\left[ Zn \left( NH _{3}\right)_{6}\right]^{+2}$ |
|---|---|---|---|
| x = +3 | x =+4 | x = +3 | x= +2 |
| d electrons = 0 | d electrons = 0 | d electrons = 3 | d electrons = 10 |
| $\therefore $ No absorption of visible light | $\therefore $ No absorption of visible light | $\therefore $ complex ion is expected to absorb visible light | $\therefore $ No absorption of visible light. |