Multiple choice

In which category, the compound [Fe4C(CO)12]-2 belong to?

  1. Closo

  2. Nido

  3. Hypho

  4. Arachno

  5. None of these
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

This option is correct because in this carbonyl compound, total electron counts to be 62,  and electron used for non skeletal bonding is 48. Therefore skeletal electron pair available for frame work bonding 1/2[62 - 48]=7e pairs, i.e., m = 4,  hence occupies (4+3)e pairs,  predicted in (m+4) rule.

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