TM Color Of Complexes Flashcards
1
Q
Fe2+
A
Green
2
Q
Fe3+
A
Yellow
3
Q
[Fe(SCN)(H2O)5]2+
A
Blood red
4
Q
Fe(OH)2
A
Green solid
5
Q
Fe(OH)3
A
Red brown solid
6
Q
MnO2
A
Black / brown solid
7
Q
MnO42-
A
Dark green
8
Q
MnO4-
A
Purple
9
Q
Mn2+
A
Pale pink / colourless
10
Q
Cr3+
A
Sky blue
11
Q
Cr2+
A
Green
12
Q
Cr2O72-
A
Orange
13
Q
CrO42-
A
Yellow
14
Q
Cr(OH)3
A
Dark green solid
15
Q
[Cr(OH)6]3-
A
Dark green
16
Q
Cu2+
A
Blue
17
Q
Cu+
A
No colour
Because Cu+:[Ar]3d10
Hence no partially filled 3d orbital and electrons cannot promote from a lower energy level to a higher one (d-d transition does not occur)
18
Q
Cu(OH)2
A
Dark blue solid
19
Q
CuO
A
Blue solid
20
Q
Cu2O
A
Red solid or brick red
(Fehling’s test positive)
21
Q
CuCO3
A
Dark green solid
22
Q
CuI
A
White solid
23
Q
[CuCl4]2-
A
Yellow
(Impt!)
24
Q
[Cu(NH3)4(H2O)2]2+
A
Dark blue
(Impt!)
