Anilato-Based Coordination Polymers with Slow Relaxation of the Magnetization: Role of the Synthetic Method and Anilato Ligand.

We have prepared and characterized three coordination polymers formulated as [Dy(COCl)(fma)] ⋅ 4.5fma (1) and [Dy(COX)(fma)] ⋅ 4fma ⋅ 2HO with X=Br (2) and Cl (3), where fma=formamide and COX =3,6-disubstituted-2,5-dihydroxy-1,4-benzoquinone dianion with X=Cl (chloranilato) and Br (bromanilato). Compounds 1 and 3 are solvates obtained with slow and fast precipitation methods, respectively.