catena-Poly[[[bis­(methanol-κO)lead(II)]-μ-N′-[1-(pyridin-2-yl-κN)ethyl­idene]isonicotinohydrazidato-κ3 N′,O:N 1] perchlorate]

The PbII atom in the polymeric title compound, {[Pb(C13H11N4O)(CH3OH)2]ClO4}n, is coordinated by an N′-[1-(pyridin-2-yl-κN)ethyl­idene]isonicotinohydrazidate ligand via O,N,N′-donors and simultaneously bridged by a neighbouring ligand via the isonicotinoyl N atom; two additional sites are occupied by methanol O atoms. The resultant supra­molecular chain is a zigzag along the c axis. The PbII atom is seven-coordinated within an N3O3 donor set and a lone pair of electrons, which defines a Ψ-pentagonal–bipyramidal coordination geometry with the pyridine N and lone pair in axial positions. The supra­molecular chains are linked into the two-dimensional array via inter­molecular Pb⋯N [3.020 (4) Å] inter­actions. Layers stack along the a axis, being connected by O—H⋯O hydrogen bonds formed between the coordinated methanol mol­ecules and perchlorate anions

2-[N-(3-Amino-4-nitro­phen­yl)carboximido­yl]phenol

The title compound, C13H11N3O3, is essentially planar (r.m.s. for the 19 non-H atoms = 0.031 Å), a conformation stabilized in part by intra­molecular O—H⋯N and N—H⋯O hydrogen bonds. The configuration about the imine bond [1.2919 (12) Å] is E. The presence of N—H⋯O(nitro) hydrogen bonds leads to the formation of supra­molecular tapes in the crystal structure. These are connected into layers by π–π inter­actions [centroid–centroid distance = 3.6046 (6) Å] occurring between the hy­droxy- and amino-substituted benzene rings

Bis{4-bromo-2-[(naphthalen-1-yl­imino)­meth­yl]phenolato-κ2 N,O}copper(II)

The title complex, [Cu(C17H11BrNO)2], lies on a centre of inversion. The chelating Schiff base anions define a square-planar N2O2 donor set. The nearly perpendicular orientation of the naphthyl residues of the chelate ring [dihedral angle = 82.12 (12)°] precludes the CuII centre from additional coordination. In the refinement, the naphthyl rings were found to be disordered over two positions.; the major component has a site occupancy of 0.667 (4)

Bis(μ-2-methyl­quinolin-8-olato)-κ3 N,O:O;κ3 O:N,O-bis­[(methanol-κO)(nitrato-κ2 O,O′)lead(II)]

The mol­ecule of the title compound, [Pb2(C10H8NO)2(NO3)2(CH3OH)2], lies about a centre of inversion. The Pb atom is chelated by nitrate and substituted quinolin-8-olate anions. The O atom of the quinolin-8-olate also bridges, to confer a six-coordinate status on the metal centre. When a longer Pb⋯O inter­action is considered, the geometry approximates a Ψ-cube in which one of the sites is occupied by a stereochemically active lone pair

Bis(μ-2-methyl­quinolin-8-olato)-κ3 N,O:O;κ3 O:N,O-bis­[(acetato-κ2 O,O′)lead(II)]

Both independent PbII atoms in the title compound, [Pb2(C10H8NO)2(C2H3O2)2], are chelated by acetate and substituted quinolin-8-olate anions; the O atoms of the quinolin-8-olates also bridge to confer a five-coordinate status to each metal center. The geometry approximates a distorted Ψ-fac octa­hedron in which one of the sites is occupied by a stereochemically active lone pair

cis-Dioxido[N′-(2-oxidobenzyl­idene)pyridinium-4-carbohydrazidato-κ3 O,N′,O′]vanadium(V)

The title Schiff base complex, [V(C13H10N3O2)O2], features a square-pyramidal coordination geometry defined by the O,N′,O′-donors of the tridentate Schiff base ligand and two oxide O atoms; one oxide O atom occupies the apical position. In the crystal, pyridinium–oxide N—H⋯O hydrogen bonds lead to zigzag supra­molecular chains with a flattened topology along [101]. The investigated crystal was twinned by nonmerohedry; the minor component refined to 18.5 (5)%

catena-Poly[[lead(II)-μ-(2-oxidobenz­aldehyde isonicotinoylhydrazonato)] methanol monosolvate]

The Pb atom in the polymeric title compound, {[Pb(C13H9N3O2)]·CH3OH}n, is five-coordinated within an N2O2 donor set and a lone pair of electrons, as the N-isonicotinamido­salicylaldiminate ligand coordinates the PbII atom via the O,N,O′-donors and simultaneously bridges a neighbouring Pb atom via the pyridine N atom; the coordination geometry is based on a trigonal bipyramid with the O atoms in axial positions. The resulting supra­molecular chain is a 31 helix along the c axis. These chains are linked via inter­molecular Pb⋯O,N inter­actions, as well as O—H⋯O hydrogen bonds

catena-Poly[[(1,10-phenanthroline-κ2 N,N′)lead(II)]-di-μ-nitrato-κ3 O,O′:O′′;κ3 O:O′,O′′-[(1,10-phenanthroline-κ2 N,N′)lead(II)]-bis­(μ-2,2,2-trichloro­acetato-κ2 O:O′)]

In the title PbII complex, [Pb2(C2Cl3O2)2(NO3)2(C12H8N2)2]n, the 1,10-phenanthroline ligand is chelating, the nitrate anion chelates one PbII ion and simultaneously bridges a neighbouring PbII ion via the third O atom, and the trichloro­acetate anion is bidentate, bridging two PbII ions. The coordination geometry is based on a penta­gonal–bipramidal geometry defined by an N2O5 donor set with no obvious stereochemical role for the lead-bound lone pair of electrons. The coordination polymer has a zigzag topology along [010] and comprises alternating eight-membered {PbONO}2 and {PbOCO}2 rings

Di-μ-chlorido-bis­[(1,10-phenanthroline-κ2 N,N′)(trichloro­acetato-κO)copper(II)]

The title compound, [Cu2(C2Cl3O2)2Cl2(C12H8N2)2], features a centrosymmetric binuclear complex. The coordination geometry around the CuII atom is square-pyramidal, comprising two N atoms from a symmetrically chelating 1,10-phenanthroline ligand, one O atom from a trichloro­acetate ligand and two Cl− anions. In addition, there is a weak intra­molecular Cu⋯O inter­action of 2.9403 (14) Å involving the carbonyl O atom of the trichloro­acetate ligand. The central Cu2Cl2 core takes the form of a rhombus, owing to the disparate Cu—Cl bond lengths. Mol­ecules are connected in the crystal structure by C—H⋯Cl and C—H⋯O inter­actions

Bis(μ-5-chloro­quinolin-8-olato)-κ3 N,O:O;κ3 O:N,O-bis­[(acetato-κ2 O,O′)lead(II)]

The mol­ecule of the title compound, [Pb2(C9H5ClNO)2(C2H3O2)2], lies about a center of inversion. The PbII atom is chelated by acetate and substituted quinolin-8-olate anions; the O atoms of the quinolin-8-olates also bridge to confer a five-coordinate status to each metal center. The geometry approximates a distorted Ψ-fac octa­hedron in which one of the sites is occupied by a stereochemically active lone pair