Crystal structure of bis­(1,3-bis­{[(1H-pyrrol-2-yl)methyl­idene]amino-κN}propan-2-olato-κO)manganese(III) nitrate methanol monosolvate

The Mn^III ion in the title compound shows a slightly distorted octa­hedral coordination geometry with two O and four N atoms of the pyrrolyl derivative ligand. In the crystal, inter­molecular N—H...O hydrogen bonds between the pyrrole group of the ligand and the uncoordinated nitrate ion give a chain structure along [10].

Bis[trans-di­fluorido­tetra­kis­(pyridine-κN)chromium(III)] sodium tetra­chlorido­zincate perchlorate from synchrotron data

The title salt, Na[CrF₂(C₅H₅N)₄]₂[ZnCl₄]ClO₄, consists of two cationic Cr^III complexes, an Na⁺ cation, one [ZnCl₄]²⁻ anion and one ClO₄⁻ anion. The Cr^III atoms are coordinated by four pyridine (py) N atoms and two F atoms in a trans arrangement, displaying a distorted octa­hedral geometry. The mean Cr—N(py) and Cr—F bond lengths are 2.086 (8) and 1.864 (14) Å, respectively. The [ZnCl₄]²⁻ anion has a distorted tetra­hedral geometry. The most notable feature of the crystal packing is the formation of weak pyridine–perchlorate C—H...O hydrogen bonds, resulting in supra­molecular chains along the b-axis direction. The perchlorate anion was disordered over two sets of sites in a 0.868 (3):0.132 (3) ratio.

Crystal structure of trans-di­fluoridotetra­kis(pyridine-κN)chromium(III) tri­chlorido­(pyridine-κN)zincate monohydrate from synchrotron data

The Cr^III atoms in the title compound show a distorted octa­hedral coordination with four pyridine N atoms in the equatorial plane and two F atoms in axial positions. The [ZnCl₃(C₅H₅N)]⁻ anion has a distorted tetra­hedral geometry.

Crystal structure of di­chlorido­{2-[(2-hy­droxyeth­yl)(pyridin-2-ylmeth­yl)amino]­ethano­lato-κ⁴N,N′,O,O′}iron(III) dihydrate from synchrotron data

The Fe^III ion in the title compound shows a slightly distorted FeCl₂N₂O₂ octa­hedral coordination geometry. In the crystal, two complex mol­ecules are linked by duplex O—H...O hydrogen bonds. Additional hydrogen-bonding inter­actions lead to the formation of undulating sheets parallel to (010).