Which of the following complexes obeys the EAN rule?

Question

Which of the following complexes obeys the EAN rule? (A) [ Pt ( NH 3)4]2+ (B) [ Ni ( NH 3)6]2+ (C) [ Cr ( NH 3)6]3+ (D) [ Fe ( CN )6]4-

Tardigrade Admin · Accepted Answer

EAN rule means that the effective atomic number of the central metal be equal to the atomic number of next noble gas. For [ Fe ( CN )6]4-, Fe is in +2 oxidation state. EAN =26-2+(6 × 2)=36 36 is equal to the atomic number of the next noble gas Kr (36)

Q. Which of the following complexes obeys the EAN rule?

$[Pt (N H_{3})_{4}]^{2 +}$

$[N i (N H_{3})_{6}]^{2 +}$

$[C r (N H_{3})_{6}]^{3 +}$

$[F e (CN)_{6}]^{4 -}$

$E A N$ rule means that the effective atomic number of the central metal be equal to the atomic number of next noble gas.

For $[F e (CN)_{6}]^{4 -}, F e$ is in $+ 2$ oxidation state.

$E A N = 26 - 2 + (6 \times 2) = 36$

$36$ is equal to the atomic number of the next noble gas $Kr (36)$

Q. Which of the following complexes obeys the EAN rule?

[Pt(NH3​)4​]2+

[Ni(NH3​)6​]2+

[Cr(NH3​)6​]3+

[Fe(CN)6​]4−

EAN rule means that the effective atomic number of the central metal be equal to the atomic number of next noble gas. For [Fe(CN)6​]4−,Fe is in +2 oxidation state. EAN=26−2+(6×2)=36 36 is equal to the atomic number of the next noble gas Kr(36)

$[Pt (N H_{3})_{4}]^{2 +}$

$[N i (N H_{3})_{6}]^{2 +}$

$[C r (N H_{3})_{6}]^{3 +}$

$[F e (CN)_{6}]^{4 -}$

$E A N$ rule means that the effective atomic number of the central metal be equal to the atomic number of next noble gas.

For $[F e (CN)_{6}]^{4 -}, F e$ is in $+ 2$ oxidation state.

$E A N = 26 - 2 + (6 \times 2) = 36$

$36$ is equal to the atomic number of the next noble gas $Kr (36)$