Poly[(μ₄-3-carb­oxy­benzoato-κ⁵O¹:O¹,O^1′:O^1′:O³)(quinolin-8-olato-κ²N,O)lead(II)]

The asymmetric unit of the title complex, [Pb(C₈H₅O₄)(C₉H₆NO)]_n, comprises a Pb^II cation, a quinolin-8-olate anion and a 3-carb­oxy­benzoate anion. The coordination geometry of the Pb^II atom is defined by one N and six O atoms, as well as a stereochemically active lone pair of electrons, and is based on a Ψ-dodeca­hedron. The quinolin-8-olate is chelating and the 3-carb­oxy­benzoate anion forms bonds to four different Pb^II atoms. The benzoate end of the 3-carb­oxy­benzoate ligand chelates one Pb^II atom and simultaneously bridges two Pb^II atoms on either side, forming a chain along the b axis. The carboxyl end of the 3-carb­oxy­benzoate connects to a neighbouring chain by employing its carbonyl atom to form a bond to a Pb^II atom and the hydroxyl group to form a hydrogen bond to a quinolin-8-olate O atom. Thereby, a layer is formed in the bc plane.

catena-Poly[[lead(II)-bis­(μ₂-quinolin-8-ol­ato)-κ³N,O:O;κ³O:N,O] N,N-di­methyl­formamide hemisolvate]

The asymmetric unit of the title compound, {[Pb(C₉H₆NO)₂]·0.5C₃H₇NO}_n, comprises Pb(quinolate)₂ and half a dimethyl­formamide mol­ecule (which is disordered about a centre of inversion). The quinolate ligands N,O-chelate to a Pb^II ion and simultaneously bridge a neighbouring Pb^II ion to form a polymeric chain along [100] comprising Pb-linked Pb₂O₂ distorted rhombi. These chains pack to form a square grid, with the channels thus defined occupied by the disordered solvent mol­ecules.

Di-μ-azido-κ⁴N:N-bis­({2-[(3-amino-2,2-dimethyl­prop­yl)imino­meth­yl]-6-meth­oxy­phenolato-1κ³N,N′,O¹}copper(II))

The complete mol­ecule of the title complex, [Cu₂(C₁₃H₁₉N₂O₂)₂(N₃)₂], is generated by the application of a centre of inversion. The central Cu₂N₂ core is a rhombus as the μ₂-azide ligands bridge in an asymmetric fashion. Each Cu^II atom is also coordinated by a monoanionic tridentate Schiff base ligand via the anti­cipated oxide O, imine N and amine N atoms. The resulting N₄O coordination geometry is based on a square pyramid. No specific inter­molecular inter­actions are noted in the crystal packing, but the amine H atoms form intra­molecular N—H...O(oxide)/N(azide) hydrogen bonds.

{μ-2-[(3-Amino-2,2-dimethyl­prop­yl)imino­meth­yl]-6-meth­oxy­phenolato-1:2κ⁵O¹,O⁶:N,N′,O¹}{2-[(3-amino-2,2-dimethyl­prop­yl)imino­meth­yl]-6-meth­oxy­phenolato-1κ³N,N′,O¹}-μ-azido-1:2κ²N:N-azido-2κN-methanol-2κO-dinickel(II)

Two distinct coordination geometries are found in the binuclear title complex, [Ni₂(C₁₃H₁₉N₂O₂)₂(N₃)₂(CH₃OH)], as one Schiff base ligand is penta­dentate, coordinating via the anti­cipated oxide O, imine N and amine N atoms (as for the second, tridentate, ligand) but the oxide O is bridging and coordination also occurs through the meth­oxy O atom. The Ni^II atoms are linked by a μ₂-oxide atom and one end of a μ₂-azide ligand, forming an Ni₂ON core. The coordination geometry for the Ni^II atom coordinated by the tridentate ligand is completed by the meth­oxy O atom derived from the penta­dentate ligand, with the resulting N₃O₃ donor set defining a fac octa­hedron. The second Ni^II atom has its cis-octa­hedral N₄O₂ coordination geometry completed by the imine N and amine N atoms of the penta­dentate Schiff base ligand, a terminally coordinated azide N and a methanol O atom. The arrangement is stabilized by an intra­molecular hydrogen bond between the methanol H and the oxide O atom. Linear supra­molecular chains along the a axis are formed in the crystal packing whereby two amine H atoms from different amine atoms hydrogen bond to the terminal N atom of the monodentate azide ligand.