How many of the following statements are correct? Use the effective atomic number (EAN) rule and count a metal-metal bond as one electron for each metal. (i) The anion [V(CO)₆]⁻ has a higher EAN at va

Question

How many of the following statements are correct? Use the effective atomic number (EAN) rule and count a metal-metal bond as one electron for each metal.

(i) The anion [V(CO)₆]⁻ has a higher EAN at vanadium than neutral V(CO)₆.

(ii) Ni(CO)₄ has an EAN of 38 at nickel.

(iii) Each Mn in Mn₂(CO)₁₀ reaches an EAN of 36.

(iv) The EAN of iron in Fe(CO)₅ is 34.

(v) Cr(CO)₆ and [Mn(CO)₆]⁺ have the same EAN at their metals.

TestHub · Accepted Answer

(i) V(CO)₆ has 23 + 12 = 35 and [V(CO)₆]⁻ has 36, correct. (ii) Ni(CO)₄ has 28 + 8 = 36, so 38 is wrong. (iii) 25 + 10 + 1 = 36, correct. (iv) Fe(CO)₅ has 26 + 10 = 36, not 34. (v) Cr(CO)₆ has 24 + 12 = 36 and Mn⁺ has 24 + 12 = 36, correct. Correct statements are i, iii and v, so 3.

Chemistry - Coordination Chemistry Question with Solution | TestHub

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