Bis(azido-κ )bis-(2,2'-di-pyridyl-amine-κ , )iron(II) monohydrate.

In the hydrated title complex, [Fe(dpa)(N)]·HO (dpa is 2,2'-di-pyridyl-amine, CHN), the Fe ion is coordinated in a distorted octa-hedral manner by two neutral, chelating dpa ligands and two anionic, monodentate azide (N ) ions in a -configuration. Distortion results from different Fe-N bond lengths [2.1397 (13)-2.

-Poly[[(8-amino-quinoline)-cobalt(II)]-di-μ-azido].

The title coordination polymer, [Co(N)(CHN)] , was synthesized solvothermally. The Co atom exhibits a distorted octa-hedral [CoN] coordination geometry with a bidentate 8-amino-quinoline ligand and four azide ligands. Bridging azide ligands result in chains extending along [100].

Di-μ-adipato-κ , : , -bis-[(2,2'-di-pyridyl-amine-κ ,')zinc(II)] trihydrate.

The title compound, [Zn(CHO)(CHN)]·3HO or {Zn[(CHN)NH][μ-(CH)(COO)]}·3HO, was separ-ated from the solvothermal reaction of zinc(II) sulfate hepta-hydrate, 2,2'-di-pyridyl-amine and sodium adipate. The dinuclear metal complex has a centrosymmetric structure, with the Zn atom adopting a highly distorted octa-hedral coordination sphere composed of four oxygen atoms from bridging adipato ligands and two pyridine nitro-gen atoms. In the crystal, the title compound aggregates into a tri-periodic supra-molecular structure through inter-molecular hydrogen-bonding networks of the form O-H⋯O and N-H⋯O.

Six tris-(bipyrid-yl)iron(II) complexes with 2-substituted 1,1,3,3-tetra-cyano-propenide, perchlorate and tetra-fluorido-borate anions; order disorder, hydrogen bonding and C-N⋯π inter-actions.

Structures are reported for six closely related salts of tris-(bipyrid-yl)iron(II) cations, namely tris-(2,2'-bi-pyridine)-iron(II) bis-(1,1,3,3-tetra-cyano-2-meth-oxy-propenide) 0.776-hydrate, [Fe(CHN)](CHNO).0.