Question

From the stability constant (hypothetical values), given below, predict which is the most stable complex ?

• A. Cu2+ + 4NH3$\longrightarrow$ [Cu(NH3)4]2+ , K = 4.5 × 1011
• B. Cu2+ 4CN–$\longrightarrow$ [Cu(CN)4]–, K = 2.0 × 1027
• C. Cu2+ 4CN–$\longrightarrow$ [Cu(CN)4]–, K = 2.0 × 1027
• D. Cu2+ + 4H2O $\longrightarrow$ [Cu(H2O)4]2+, K = 9.5 × 108

Answer 1

Answer: (B)

Cu2+ 4CN–$\longrightarrow$ $Cu(CN)4$–, K = 2.0 × 1027

Answer 2

K µ stability.

Section (F) : Isomerism in Coordination compounds

(Structural Isomerism, Stereoisomerism, Geometrical Isomerism, Optical Isomerism)