I struggled with this. i have no idea which structure it is please help 10 An ir

Question

I struggled with this. i have no idea which structure it is please help

10 An iron containing material (a has been characterized with the following analyses fa 1.000 g of the material was dried slawly in a foil pan at 120 The resulting mass was 0,886 g, The anhydrous material is called (Ba, (b) 1.000 g of (A) was dissolved and excess silver nitrate was added A precipitate was isolated with a dried mass of 0.565 g (c) The iron(D complex was found to have a so of0 BM, suggesting that it was a low spin complex. This is true for both materials (A) and (B). (d) Elemental analysis on (A determined that it contained 77% Fe, 55.71% C4,68% H and 17 T2% N (e) A low-resolution mass m af was generated (below), The molecular ion has m/z ratio of420 (not present on the spectrum) (f The m z 156 peak in the mass spectrum was identified to be bipyridine. also known as the 2,2'-dipyridyl ligand. HINT: Identifying navz 26 is VITAL to solving this problem. From the information abon determine the structural fomvula of Ay, There are two possible rs, but you only need to determine tructural formula. 20 30 40 50 60 70 80 90 100 110 120 120 l40 50 160 m/z

Explanation / Answer

THE EXPECTED COMPOUND IS

IRON (II) TRIS-(2,2'-BIPYRIDYL) OR, IRON (II) TRIS-(2,2'-DIPYRIDYL)

WHERE Fe(II) IS IN LOW SPIN CONFIGURATION,(t2g6 eg0) ALL SPIN PAIRED THATS WHY IT SHOWS SPIN ONLY MAGNETIC MOMENT IE EQUALS TO ZERO.

The elemental analysis also directly matches with this product.

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