Tris(2,2′-bipyridine-κ²N,N′)cobalt(III) tris­(oxalato-κ²O¹,O²)ferrate(III) mono­hydrate

The title compound, [Co(C₁₀H₈N₂)₃][Fe(C₂O₄)₃]·H₂O, con­sists of two discrete tris­(chelate) metal ions (Co^IIIN₆ and Fe^IIIO₆ chromophores) and a water mol­ecule. The structure is highly symmetrical; the Co^III and Fe^III ions occupy positions with site symmetry 3.2. The coordination polyhedra of the metal atoms have a nearly octa­hedral geometry with noticeable trigonal distortions. The Co—N and Fe—O bond lengths are equal by symmetry, viz. 1.981 (2) and 1.998 (4) Å, respectively. The cations and anions are arranged alternately along their threefold rotation axes parallel to [001], forming chains that are packed in a hexa­gonal manner. The water mol­ecules occupy voids between the chains. The crystal under investigation was an inversion twin.

[2-(Dimethyl­amino)­ethanol-κ²N,O][2-(dimethyl­amino)­ethano­lato-κ²N,O]iodidocopper(II)

The title compound, [Cu(C₄H₁₀NO)I(C₄H₁₁NO)], was obtained unintentionally as the product of an attempted synthesis of a Cu/Zn mixed-metal complex using zerovalent copper, zinc(II) oxide and ammonium iodide in pure 2-(dimethyl­amino)­ethanol, in air. The mol­ecular complex has no crystallographically imposed symmetry. The coordination geometry around the metal atom is distorted square-pyramidal. The equatorial coordination around copper involves donor atoms of the bidentate chelating 2-(dimethyl­amino)­ethanol ligand and the 2-(dimethyl­amino)­ethano­late group, which are mutually trans to each other, with four approximately equal short Cu—O/N bond distances. The axial Cu—I bond is substanti­ally elongated. Inter­molecular hydrogen-bonding inter­actions involving the –OH group of the neutral 2-(dimethyl­amino)­ethanol ligand to the O atom of the monodeprotonated 2-(dimethyl­amino)­ethano­late group of the mol­ecule related by the n-glide plane, as indicated by the O...O distance of 2.482 (12) Å, form chains of mol­ecules propagating along [101].

Tris(1,10-phenanthroline-κ²N,N′)iron(II) bis­[(1,10-phenanthroline-κ²N,N′)tetra­kis­(thio­cyanato-κN)chromate(III)] acetonitrile tris­olvate monohydrate

Single crystals of the title heterometallic compound, [Fe(C₁₂H₈N₂)₃][Cr(NCS)₄(C₁₂H₈N₂)]₂·3CH₃CN·H₂O or [Fe(Cphen)₃][Cr(NCS)₄(phen)]₂·3CH₃CN·H₂O, were pre­pared using the one-pot open-air reaction of iron powder, Reineckes salt and 1,10-phenanthroline (phen) in acetonitrile. The asymetric unit consists of an [Fe(phen)₃]²⁺ cation, two [Cr(phen)(NCS)₄]⁻ anions, three acetonitrile solvent mol­ecules and a water mol­ecule. The Fe and Cr atoms both show a slightly distorted octa­hedral FeN₆ and CrN₆ coordination geometry with adjacent angles in the range 79.67 (12)–95.21 (12)°. No classical hydrogen bonding involving the water molecule is observed.

Hexa­kis­(dimethyl­formamide-κO)manganese(II) (dimethyl­formamide-κO)pentakis(­thio­cyanato­-κN)chromate(III)

The title compound, [Mn(C₃H₇NO)₆][Cr(NCS)₅(C₃H₇NO)], was obtained unintentionally as a product of an attempted synthesis of heterometallic complexes based on Reineckes anion using manganese powder, Reineckes salt and 1-(2-hy­droxy­eth­yl)tetra­zole as starting materials. The crystal structure of the complex consists of an [Mn(dmf)₆]²⁺ cation and a [Cr(NCS)₅(dmf)]²⁻ anion (dmf = dimethyl­formamide). The Mn^II and Cr^III atoms show a slightly distorted octa­hedral MnO₆ and CrN₅O coordination geometries with adjacent angles in the range 85.29 (13)–95.96 (14)°.

Bis(2-hy­droxy­imino­methyl-6-meth­oxy­phenolato-κ²N,O¹)copper(II)

In the title compound, [Cu(C₈H₈NO₃)₂], the nearly planar mol­ecule (r.m.s. deviation = 0.037 Å) is centrosymmetric with the Cu^II atom lying on an inversion center. The Cu^II atom is tetra­coordinated, displaying a slightly distorted square-planar geometry. The main deviation from the ideal geometry is seen in the differences in the Cu—O [1.8833 (10) Å] and Cu—N [1.9405 (13) Å] bond lengths, while angular deviations are less than 3°. Intra­molecular O—H...O and inter­molecular Csp²—H...O hydrogen bonds form S(5) and R₂²(8) ring motifs, respectively. The latter inter­action results in chains of mol­ecules along [100].

Bis[(cyanido-κC)bis(1,10-phenanthroline-κ²N,N′)copper(II)] pentakis­(cyanido-κC)nitro­soferrate(II) dimethyl­formamide monosolvate

The title compound, [Cu(CN)(C₁₂H₈N₂)₂]₂[Fe(CN)₅(NO)]·C₃H₇NO, is formed of discrete [Cu(phen)₂CN]⁺ cations (phen is 1,10-phenanthroline), nitro­prusside [Fe(CN)₅(NO)]²⁻ anions and dimethyl­formamide (DMF) mol­ecules of crystallization. The metal atom has a distorted trigonal–bipyra­midal coordination environment, defined by four N atoms of two phen mol­ecules and a C atom of the cyanide group (in the equatorial position). The [Fe(CN)₅(NO)]²⁻ anion was found to be disordered about (but not on) a crystallographic twofold rotation axis. Geometries were restrained to ideal values. The dimethyl­formamide solvent mol­ecule was found to be disordered about a crystallographic inversion centre.