Bis[μ-N-(3-meth­oxy-2-oxidobenzyl­idene-1:2κ²O²:O²)-L-isoleucinato-2κ²N,O]bis­(1,10-phenanthroline-1κ²N,N′)dinickel(II) methanol tetra­solvate trihydrate

In the title complex, [Ni₂(C₁₄H₁₇NO₄)₂(C₁₂H₈N₂)₂]·4CH₃OH·3H₂O, the two Ni^II ions are bridged by two Schiff base anions, leading to a dinuclear complex. One Ni^II ion is six-coordinated by four O atoms and two N atoms of two tridentate Schiff base ligands derived from the condensation of L-isoleucine and o-vanillin. The other Ni^II ion is six-coordinated by four N atoms of two 1,10-phenanthroline ligands and two O atoms of the Schiff base ligands. In the crystal, inter­molecular O—H...O and C—H...O hydrogen bonds lead to a three-dimensional structure. Intra­molecular C—H...O hydrogen bonds are also present. One of the methyl groups of the L-isoleucinate moieties is disordered over two sets of sites with an occupancy ratio of 0.687 (19):0.313 (19) and two methanol mol­ecules are half-occupied.

(Methanol-κO)(methano­lato-κO)oxido[N-(2-oxidobenzyl­idene)isoleucinato-κ³O,N,O′]vanadium(V)

In the title complex, [V(C₁₃H₁₅NO₃)O(CH₃O)(CH₃OH)], the V^V atom is six-coordinated by a tridentate O,N,O′-donor ligand, derived from the condensation of salicyl­aldehyde and L-isoleucine, a vanadyl O atom, a methano­late O atom and a methanol O atom in a distorted octa­hedral geometry. The asymmetric unit contains two complex mol­ecules. In the crystal, inter­molecular O—H...O and C—H...O hydrogen bonds connect the mol­ecules into a one-dimensional chain along [100].

Phenazinium methyl sulfate

The title salt, C₁₂H₉N₂⁺·CH₃O₄S⁻, contains an almost planar phenazinium cation [largest deviation from the least-squares plane = 0.040 (3) Å] and a methyl sulfate anion. The sulfate moiety of the latter is disordered over two sets of sites in a 0.853 (5):0.147 (5) ratio. In the crystal, the cations and anions are arranged alternately in layers parallel to (010). The cations pack along [100] with a tilt angle of 28.96 (4)° between this axis and the mean plane and are linked through inter­planar π–π inter­actions [shortest inter­planar distance = 3.421 (4) Å]. N—H...O hydrogen-bonding between the cations and anions is also observed.

Phenazin-5-ium bromide

In the title compound, C₁₂H₉N₂⁺·Br⁻, the protonated tricyclic ring system is slightly twisted, with a dihedral angle of 3.9 (1)° between the two outer benzene rings. In the crystal, N—H...Br and C—H...Br hydrogen bonds link two cations and two bromide anions into centrosymmetric assemblies, which are further packed into stacks along [010] via π–π inter­actions between the aromatic rings [centroid–centroid distance = 3.725 (4) Å].

2,5-Dichloro-3,6-diisopropyl­cyclo­hexa-2,5-diene-1,4-dione

The mol­ecule of the title compound, C₁₂H₁₄Cl₂O₂, lies about an inversion center. The six-membered ring is almost planar, with the largest deviation from the least-squares plane being 0.014 (4) Å. The mol­ecular conformation is stabilized by a weak intra­molecular C—H...O hydrogen bond. In the crystal, mol­ecules are packed into stacks along the c-axis direction, with an inter­centroid separation of 4.811 (2) Å. Neighboring mol­ecules within the stack are related by the c-glide plane.