Complexes of Ln3+ with aromatic N-donor ligands

High coordination numbers are often observed with aromatic N-donors. Complexes of these ligands with Eu or Tb are often luminescent.

Click on the links to display the structures

bipy terpy naphthyridine

10-coordinate La complex with bipy
[La(bipy)2(NO3)3]

10-coord La complex with tridentate terpy ligand
[La(terpy)2(NO3)2]+

9-coord Eu complex with tridentate terpy ligand
 [Eu(terpy)3]3+

12-coord Pr complex with naphthyridine - small bite angle allows higher coordination number
[Pr(naphth)6]3+]

This view shows just the N donors, which form a distorted icosahedral coordination polyhedron
[PrN12]3+]

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