Aqua­(dipicolinato-[kappa]³O,N,O')(1H-imidazole-[kappa]N³)(1,10-phenanthroline-N,N')manganese(II)

In the title compound, [Mn(C₇H₃NO₄)(C₃H₄N₂)(C₁₂H₈N₂)(H₂O)], the Mn^II centre is surrounded by one bidentate phenanthroline ligand [Mn-N = 2.383 (3) and 2.421 (3) Å], one tridentate dipicolinate ligand [Mn-N = 2.300 (3) Å, and Mn-O = 2.300 (2) and 2.357 (2) Å], one monodentate imidazole ligand [Mn-N = 2.238 (3) Å] and one water mol­ecule [Mn-O = 2.157 (3) Å]. It displays a distorted penta­gonal-bipyramidal geometry, with neighbouring angles within the equatorial plane ranging from 68.05 (9) to 77.48 (10)°. Inter­molecular O-H...O hydrogen bonds link the mol­ecules into infinite chains. The chains are crosslinked by hydrogen bonds involving the carboxyl O atoms of the dipicolinate ligand and the protonated imidazole N atom, leading to an infinite two-dimensional network sheet packing mode. The complete solid-state structure can be described as a three-dimensional supra­molecular framework, stabilized by these inter­molecular hydrogen-bonding inter­actions and [pi]-[pi] stacking inter­actions involving the phenanthroline rings.

Bis([mu]₄-butane-1,4-dithiol­ato)bis­[hexa­carbonyl­diiron(II)(Fe-Fe)]

The novel title double-butterfly Fe/S cluster complex, [Fe₄(C₄H₈S₂)₂(CO)₁₂], which is structurally similar to the active site of the Fe-only hydrogenases, contains two inversion-related Fe₂S₂(CO)₆ subcluster cores connected by two equivalent butyl chains to afford a 16-membered macrocycle. The formation of the 16-membered macrocycle has an influence on the C-S-Fe angles, while the Fe-Fe and Fe-S bond lengths remain similar to those in related complexes.

Formation of a one-dimensional water chain containing two linking patterns of planar water tetra­mers

The self-assembly of the title dinuclear complex, namely (μ-p-phenyl­enediamine-N,N,N′,N′-tetra­acetato)bis­[aqua­(1,10-phenanthroline)nickel(II)] dodecahydrate, [Ni₂(C₁₄H₁₂N₂O₈)(C₁₂H₈N₂)₂(H₂O)₂]·12H₂O, through intricate noncovalent inter­actions results in a two-dimensional sheet-like structure. The dimer lies about an inversion centre at the centre of the p-phenylenediamine ring. Uncoordinated water mol­ecules form one-dimensional chains in which cyclic water tetra­mers act as two types of building blocks. The water mol­ecules play a significant role in the stabilization of the three-dimensional supra­molecular framework. Intra­molecular `aryl–metal chelate ring' π–π inter­actions are also observed.

[2-(2-Pyrid­yl)-1H-benzimidazole-[kappa]²N²,N³]bis­(p-toluato-[kappa]²O,O')­manganese(II)

In the title compound, [Mn(C₈H₇O₂)₂(C₁₂H₉N₃)], the manganese(II) centre is surrounded by three bidentate chelating ligands, namely, one 2-(2-pyrid­yl)benzimidazole ligand [Mn-N = 2.1954 (13) and 2.2595 (14) Å] and two p-toluate ligands [Mn-O = 2.1559 (13)-2.2748 (14) Å]. It displays a severely distorted octa­hedral geometry, with cis angles ranging from 58.87 (4) to 106.49 (5)°. Inter­molecular C-H...O hydrogen bonds between the p-toluate ligands link the mol­ecules into infinite chains, and every two neighbouring chains are further coupled by N-H...O and C-H...O hydrogen bonds between the 2-(2-pyrid­yl)benzimidazole and p-toluate ligands, leading to an infinite ribbon-like double-chain packing mode. The complete solid-state structure can be described as a three-dimensional supra­molecular framework, stabilized by these inter­molecular hydrogen-bonding inter­actions and possible C-H...[pi] inter­actions, as well as stacking inter­actions involving the 2-(2-pyrid­yl)benzimidazole ligands.