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How many of the following are diamagnetic ?

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How many of the following are diamagnetic ?

(a) K4 [Fe(CN)6]

(b) Na3[Co(ox)3]

(c) [Pt(NH3)3Cl]Br

(d) [Fe(H2O)6]2+

(e) [Zn(NH3)4] Cl2(f) [MnO4]2- 

(g)  Li[AlH4]

(h)  [V(H2O)6]2+

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1 Answer

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(a) Fe+2 = d6 , CN- is SFL so all paired (t6 2g  e0g)

(b) Co3+ = d6 , (t2g6  e0g)

(c)  Pt2+ = 5d8 , CN = 4, all paired, square planar

(d)  Fe2+ = d6 , H2O is WFL, so paramagnetic

(e)   Zn2+ = d10 , diamagnetic

(f)   Mn+6 = d1 , paramagnetic

(g)   Al3+ - diamagnetic

(h)  V2+ = d3 , paramagnetic.

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