In complexes of weak field ligands, (Pairing energy)

CHEMISTRY · Single correct · A Level · Chemistry · Transition metals and their chemistry · Transition metals and their chemistry

Problem

In complexes of weak field ligands,

\Delta_o < P

(Pairing energy), the energy difference between

t_{2g}

and

e_g

sets is relatively less. Under the influence of strong field ligands,

\Delta_o > P

(Pairing energy), the energy difference between

t_{2g}

and

e_g

sets is relatively high. Which of the following is correct statement ? (1) Complex

[\text{Co}(\text{H}_2\text{O})_6]^{2+}

is more stable than

[\text{Co}(\text{H}_2\text{O})_6]^{3+}

(2) All complexes of Ni (II) are bound to be outer

d

-orbital complexes. (3) Stability constant for

[\text{Ni}(\text{en})_3]^{2+}

is greater than stability constant for

[\text{Ni}(\text{NH}_3)_6]^{2+}

(4)

\Delta_{\text{oct}}

for

[\text{Cr}(\text{H}_2\text{O})_6]^{3+}

is greater than

\Delta_{\text{oct}}

for

[\text{Cr}(\text{NH}_3)_6]^{3+}