He further postulated that octahedral, tetrahedral and square planar
geometrical shapes are more common in coordination compounds of
transition metals Thus, [Co(NH3)6]
3+, [CoCl(NH3)5]
2+ and [CoCl2(NH3)4]
+
are octahedral entities, while [Ni(CO)4] and [PtCl4]
2– are tetrahedral and
square planar, respectively Colour
Formula
Solution conductivity
corresponds to
Table 5 1: Formulation of Cobalt(III) Chloride-Ammonia Complexes
Yellow
[Co(NH3)6]
3+3Cl
–
1:3 electrolyte
Purple
[CoCl(NH3)5]
2+2Cl
–
1:2 electrolyte
Green
[CoCl2(NH3)4]
+Cl
–
1:1 electrolyte
Violet
[CoCl2(NH3)4]
+Cl
–
1:1 electrolyte
Rationalised 2023-24
120
Chemistry
(i) Secondary 4
(ii) Secondary 6
(iii) Secondary 6
(iv) Secondary 6
(v) Secondary 4
On the basis of the following observations made with aqueous solutions,
assign secondary valences to metals in the following compounds:
Solution
Solution
Solution
Solution
Solution
Difference between a double salt and a complex
Both double salts as well as complexes are formed by the combination
of two or more stable compounds in stoichiometric ratio