Constructor graph description of hydrogen bonding in a supramolecular assembly of N,N'-bis(2-hydroxy-1-methylethyl)phthalamide.

Hydrogen bonds of four types (N-H...O=C, N-H...OH, O-H...O=C and O-H...OH) connect molecules of the title compound, C(14)H(20)N(2)O(4), in the crystal into sheets folded into a zigzag pattern. The intermolecular interactions are discussed in terms of the first- through fourth-level graph sets, and a constructor graph helps visualize the supramolecular assembly.

Racemic iron(III) and cobalt(III) complexes containing a new pentadentate "helmet" phthalocyaninato ligand.

Solvothermal reactions of iron(II) acetate tetrahydrate and cobalt(II) acetate tetrahydrate with 1,2-dicyanobenzene in methanol solution result in the formation of racemic six-coordinate iron(III) and cobalt(III) complexes, respectively, with a new bicyclic pentadentate 14,28-[1,3-diiminoisoindolinato]phthalocyaninato ligand.

Why magnesium is five-coordinate in methanol(phthalocyaninato)magnesium(II).

The square-pyramidal Mg center in the title compound, [Mg(C(32)H(16)N(8))(CH(4)O)], is five-coordinate due to the formation of back-to-back pi-pi dimers that saturate the vacant apical site of the metal coordination sphere. Each complex is a member of a back-to-back and a face-to-face dimer; the latter are tethered by two strong O-H...N hydrogen bonds. The dimers form columns that likely determine the solid-state packing. The phthalocyaninate ligands are essentially planar, with a slight 'hat visor' conformation character.