Hexakis(μ₄-2-amino-2-methyl­propane-1,3-diolato)hexa­chloro­hepta­iron(II,III) acetonitrile disolvate monohydrate

Single crystals of a new mixed-valence compound, [Fe₇(C₄H₉NO₂)₆Cl₆]·2CH₃CN·H₂O, were synthesized by solvothermal methods. The crystal structure consists of discrete hepta­nuclear complexes which are linked by weak inter­molecular C—H...Cl hydrogen bonds to form a two-dimensional network. In each complex, a central Fe atom is connected to six surrounding Fe centres by alkoxo-type O atoms from the organic ligand. Bond-valence sum calculations indicate that the central Fe ion is Fe^II, as are two of the outer Fe centers, while the remaining four Fe centers are Fe^III. Although the outer Fe atoms are crystallographically equivalent, it is uncertain whether this arises from positional disorder or charge delocalization. The molecular structure has S₆ point symmetry.

1,5-Bis(3-thien­yloxy)-3-oxapenta­ne: a thio­phene-based precursor for thio­phene-based aza­cryptand Mannich bases

The title compound, C₁₂H₁₄O₃S₂, is composed of two thio­phene rings bridged by an –O(CH₂)₂O(CH₂)₂O– chain. The mol­ecule is U-shaped, with the two thio­phene rings inclined to one another by 83.21 (10)°. In the crystal structure, the mol­ecules are bridged by C—H...S and C—H...·O hydrogen bonds, forming a double-stranded polymer chain.

1,2-Bis(3-thien­yloxy)ethane: a thio­phene-based precursor for thio­phene-based aza­cryptand Mannich bases

The title compound, C₁₀H₁₂O₂S₂, is composed of two thio­phene rings bridged by an –O(CH₂)₂O– chain in a trans arrangement. The mol­ecule possesses C₂ symmetry with the twofold axis bis­ecting the central C—C bond. In the crystal structure, mol­ecules related by a centre of symmetry are bridged by C—H...O hydrogen bonds, forming a zigzag one-dimensional chain extending in the c-axis direction.