Versatile Ligands for the Construction of Layered Metal-Containing Networks

The synthetic opportunities furnished by organic synthesis and the inherent structure-directing possibilities of coordination complexes have been combined in the assembly of a series of layered metal-containing hybrid materials. The supramolecular assembly relies on self-complementary non-covalent interactions, and in five of the six structures presented herein, N–H···O=C hydrogen bonds between acetamide moieties on neighbouring ligands provide the primary structure-direction tool as intended. The distances between metal ions are controlled by ligand···ligand hydrogen bonds and reside within a narrow and tuneable range. The following crystal structures are reported: [Cu(4-(3-pyridyl)-1-acetamidobenzene)2(1,1,1,5,5,5-hexafluoro-2,4-pentanedione)2] 1; [Cu(4-(acetamidomethyl)pyridine)2(1,1,1,5,5,5-hexafluoro-2,4-pentanedione)2]·2CH2Cl2 2; [Cu(3-acetamidopyridine)2(1,1,1,5,5,5-hexafluoro-2,4-pentanedione)2] 3; [Ni(3-acetamidopyridine)2(1,3-diphenyl-1,3-propanedione)2]·2CH2Cl2 4; [Ni(3-acetamidopyridine)2(1,3-diphenyl-1,3-propanedione)2] 5; and [Co(2-acetamidopyridine)2(1,3-diphenyl-1,3-propanedione)2]·2CH2Cl2 6.