{5,5′-Dimeth­oxy-2,2′-[1,1′-(2,2-dimethyl­propane-1,3-diyldinitrilo)­diethyl­idyne]diphenolato-κ4 O,N,N′,O′}copper(II) monohydrate

The tetra­dentate dianion in the title complex hydrate, [Cu(C23H28N2O4)]·H2O, provides the CuII atom with a cis-N2O2 donor set. There is a significant twist from a regular square-planar geometry with the dihedral angle formed between the two six-membered CuOC3N chelate rings being 32.14 (8)°. The water mol­ecule forms hydrogen bonds to each of the coordinating O atoms of a given complex mol­ecule. Supra­molecular layers in the bc plane are formed in the crystal packing through C—H⋯O and C—H⋯π inter­actions

{4,4′-Dibromo-2,2′-[2,2-dimethyl­propane-1,3-diylbis(nitrilo­methanylyl­idene)]diphenolato-κ4 O,N,N′,O′}nickel(II)

In the title compound, [Ni(C19H18Br2N2O2)], the NiII ion, lying on a twofold rotation axis, is coordinated by two N atoms and two O atoms from the Schiff base ligand in a distorted square-planar geometry. Weak inter­molecular C—H⋯O hydrogen bonds stabilize the crystal structure

2-{(1E)-1-[(3-{(E)-[1-(2-Hy­droxy-4-meth­oxy­phen­yl)ethyl­idene]amino}-2,2-di­methyl­prop­yl)imino]­eth­yl}-5-meth­oxy­phenol

Mol­ecules of the title compound, C23H30N2O4, are located on a crystallographic mirror plane. The mol­ecule has a curved shape with the dihedral angle formed between the two benzene rings being 55.26 (5)°. Intra­molecular O—H⋯N hydrogen bonds are noted. In the crystal, supra­molecular layers are formed in the ac plane owing to the presence of C—H⋯π inter­actions