Bis­(pentane‐1,5‐di­ammonium) deca­iodo­triplumbate(II)

The title compound, {(NH₃C₅H₁₀NH₃)₂[Pb₃I₁₀]}_n, crystallizes as an organic–inorganic hybrid. As such, the structure consists of extended chains of [Pb₃I₁₀]_n⁴ⁿ⁻ ions extending along [111]. The asymmetric unit contains two independent Pb atoms: one is in a general position and the other is on an inversion centre. Each Pb atom is octahedrally coordinated by six iodide ions and exhibits both face‐ and edge‐sharing with adjacent atoms in the inorganic chain. The organic counter‐ion, viz. pentane‐1,5‐di­ammonium, lies in channels formed by the chains and interacts with these chains via N—H⋯I hydrogen bonding.     

Octa­kis(3‐propyl­ammonium) octa­deca­iodo­penta­plumbate(II): a new layered stucture based on layered perovskites

The title compound, (C₃H₁₀N)₈[Pb₅I₁₈], crystallizes as an inorganic–organic hybrid. As such, the structure consists of two‐dimensional sheets of corner‐ and face‐sharing [PbI₆]⁴⁻ octa­hedra, separated by layers of 3‐propyl­ammonium cations, which hydrogen bond to the I atoms. The asymmetric unit contains six independent Pb atoms; four are on general positions and the other two are on special positions, viz. a centre of inversion and a twofold axis. The inorganic sheets show a never before seen motif.     

catena‐Poly[bis­(tert‐butyl­ammonium) [plumbate(II)‐tri‐μ‐iodo] iodide dihydrate]

The title compound, {(C₄H₁₂N)₂[PbI₃]I·2H₂O}_n, crystallizes as an organic–inorganic hybrid. The six‐coordinate Pb atom lies on a centre of inversion and all the I atoms lie on mirror planes; the two independent cations both lie across mirror planes. The structure contains anionic chains along [100] of fused [PbI₃]⁻ units forming face‐sharing octa­hedra. Four cations enclose channels occupied by isolated iodide ions and water mol­ecules of hydration.     

A three‐dimensional lead(II) coordination polymer: poly[aqua‐μ‐imidazole‐4,5‐dicarboxyl­ato‐lead(II)]

In the title coordination polymer, [Pb(C₅H₂N₂O₄)(H₂O)]_n, the Pb^II atom is seven‐coordinated by one N atom and five O atoms from four individual imidazole‐4,5‐dicarboxyl­ate (HIDC²⁻) groups and one water mol­ecule. It is inter­esting to note that the HIDC²⁻ group serves as a bridging ligand to link the Pb^II atoms into a three‐dimensional microporous open‐framework.     

A bicapped trigonal–prismatic lead complex: catena‐poly[[[aqua­bis(1,10‐phenanthroline‐κ2N,N′)lead(II)]‐μ‐squarato‐κO1:κ2O2,O3] dihydrate]

The asymmetric unit of the title compound, {[Pb(C₄O₄)(C₁₂H₈N₂)₂(H₂O)]·2H₂O}_n, contains one squarate dianion, two phenanthroline (phen) ligands and one aqua ligand all coordinated to Pb, and two solvent water mol­ecules. The eight‐coordinate Pb metal ion displays a distorted bicapped trigonal–prismatic coordination environment, defined by three squarate O atoms, four N atoms from two chelating phen ligands and one O atom from the coordinated water mol­ecule. The crystal structure contains chains of squarate‐1,2,3‐bridged Pb^II ions running in the [010] direction. These polymeric chains are linked to one another via offset face‐to‐face π–π inter­actions between the phen ligands, which lead to a two‐dimensional network extending along the (001) plane. The crystal structure is also stabilized by O—H⋯O inter­molecular hydrogen‐bond inter­actions, forming a three‐dimensional network.     

Poly[(μ2‐aqua‐κ2O:O)(μ3‐azido‐κ3N1:N1:N3)(μ2‐isonicotinato‐κ2O:O′)lead(II)]

In the title compound, [Pb(C₆H₄NO₂)(N₃)(H₂O)]_n, the Pb ion is seven‐coordinated by three N atoms from three azide ligands, two O atoms from two isonicotinate (inic) ligands and two O atoms from two coordinated water molecules, forming a distorted monocapped triangular prismatic coordination geometry. Each azide ligand bridges three Pb^II ions in a μ_1,1,3 coordination mode to form a two‐dimensional three‐connected 6³ topology network extending in the bc plane. The carboxylate group of the inic unit and the aqua ligand act as coligands to bridge Pb^II ions. Adjacent two‐dimensional layers are connected by hydrogen‐bonding interactions between the isonicotinate N atom and the water molecule, resulting in an extended three‐dimensional network. The title complex is the first reported coordination polymer involving a p‐block metal, an azide and a carboxylate.     

Poly[bis(μ‐5‐iodoisophthalato)(methanol)dilead(II)] exhibiting a novel centrosymmetric rhombus‐shaped I4 unit

The asymmetric unit of the title compound, [Pb₂(C₈H₃IO₄)₂(CH₄O)]_n, contains two Pb^II atoms, two 5‐iodoisophthalate (5‐IIP²⁻) ligands and one coordinated methanol molecule. One Pb atom is eight‐coordinated, surrounded by seven carboxylate O atoms from five 5‐IIP²⁻ ligands and one O atom from the terminal methanol ligand. The other Pb atom is seven‐coordinated in a hemidirected geometry, surrounded by seven carboxylate O atoms from five 5‐IIP²⁻ ligands. Both Pb atoms are connected by carboxylate groups to form a one‐dimensional infinite rod along the a axis; neighbouring rods are further linked by the aromatic rings of 5‐IIP²⁻ to generate the final three‐dimensional structure with channels in the a direction. An O—H...O hydrogen bond between the methanol ligand and one of the carboxylate groups of a 5‐IIP²⁻ ligand stablizes the three‐dimensional framework. Interestingly, a centrosymmetric rhombus‐shaped I₄ unit is formed by four 5‐IIP²⁻ ligands, with I...I distances of 3.8841 (8) and 3.9204 (8) Å.     

Two‐Dimensional Holo‐ and Hemidirected Lead(II) Coordination Polymers: Synthetic,Spectroscopic, Thermal,and Structural Studies of [Pb(μ‐SCN)2(μ‐ebp)1.5]n and {[Pb(μ‐OAc)(μ‐ebp)](ClO4)}n (ebp=4,4′‐[(1E)‐Ethane‐1,2‐diyl]bis[pyridine]; OAc=Acetato)

Two new coordination polymers of Pb^II complexes with bridging 4,4′‐[(1E)‐ethane‐1,2‐diyl]bis[pyridine] (ebp), thiocyanato, and acetato ligands, [Pb(μ‐SCN)₂(μ‐ebp)_1.5]_n ( 1 ) and {[Pb(μ‐OAc)(μ‐ebp)](ClO₄)}_n ( 2 ), were synthesized and characterized by elemental analysis, FT‐IR, ¹H‐ and ¹³C‐NMR, thermal analysis, and single‐crystal X‐ray diffraction. In 1 , the Pb²⁺ ions are doubly bridged by both the ebp and the SCN⁻ ligands into a two‐dimensional polymeric network. The seven‐coordinate geometry around the Pb²⁺ ion in 1 is a distorted monocapped trigonal prism, in which the Pb²⁺ ions have a less‐common holodirected geometry. In 2 , the Pb²⁺ ions are bridged by AcO⁻ ligands forming linear chains, which are also further bridged by the neutral ebp ligands into a two‐dimensional polymeric framework. The Pb²⁺ ions have a five‐coordinate geometry with two N‐atoms from two ebp ligands and three O‐atoms of AcO⁻. Although ClO acts as a counter‐ion, it also makes weak interactions with the Pb²⁺ center. The arrangement of the ligands in 2 exhibits hemidirected geometry, and the coordination gap around the Pb²⁺ ion is possibly occupied by a configurationally active lone pair of electrons.     

catena‐Poly[bis[1‐chloromethyl‐1,4‐diazoniabicyclo[2.2.2]octane] [cadmium(II)‐tri‐μ‐chlorido‐[chloridocadmium(II)]‐di‐μ‐chlorido‐[chloridocadmium(II)]‐tri‐μ‐chlorido] tetrahydrate]

The title compound, {(C₇H₁₅N₂Cl)₂[Cd₃Cl₁₀]·4H₂O}_n, consists of 1‐chloromethyl‐1,4‐diazoniabicyclo[2.2.2]octane dications, one‐dimensional inorganic chains of {[Cd₃Cl₁₀]⁴⁻} anions and uncoordinated water molecules. Each of the two independent Cd^II ions, one with site symmetry 2/m and the other with site symmetry m, is octahedrally coordinated by chloride ions (two with site symmetry m and one with site symmetry 2), giving rise to novel polymeric zigzag chains of corner‐sharing Cd‐centred octahedra parallel to the c axis. The organic cations, bisected by mirror planes that contain the two N atoms, three methylene C atoms and the Cl atom, are ordered. Hydrogen bonds (O—H...Cl and O—H...O) between the water molecules (both with O atoms in a mirror plane) and the chloride anions of neighbouring chloridocadmate chains form a three‐dimensional supramolecular network.     

catena‐Poly­[1,4‐diazo­niabicyclo­[2.2.2]­octane [silver(I)‐tri‐μ‐thio­cyanato‐κ6S:S]]

The title compound, {(C₆H₁₄N₂)[Ag(NCS)₃]}_n, is a polymeric silver(I) complex. The Ag^I atom is hexacoordinated by the S atoms of six thio­cyanate anions, with each thio­cyanate S atom acting in a bridging mode to link the Ag atoms together. The unique Ag^I atom lies at a cell origin and has crystallo­graphically imposed symmetry. The diazonia[2.2.2]octane molecule lies about a site with imposed symmetry with the unique N atom on a threefold axis. The S and N atoms of the thio­cyanate ligands sit on a mirror plane and a threefold axis, respectively. The crystal structure consists of one‐dimensional chains, which are stabilized by N—H⋯N hydrogen bonds to form a three‐dimensional network.     

Poly[[μ‐aqua‐bis­(μ‐2,4‐dichloro­phen­oxy­acetato)barium(II)] monohydrate]

In the title coordination polymer, {[Ba(C₈H₅Cl₂O₃)₂(H₂O)]·H₂O}_n, each Ba^II atom is nine‐coordinated by six carboxyl­ate O atoms and one ether O atom from five symmetry‐related 2,4‐dichloro­phenoxy­acetate ligands, and by two O atoms from water mol­ecules, thus defining a distorted tricapped trigonal prism. The Ba^II ions are bridged by bidentate water mol­ecules and by tridentate and tetra­dentate 2,4‐dichloro­phenoxy­acetate groups, leading to a two‐dimensional layer structure. The crystal structure is further stabilized by hydrogen‐bonding inter­actions within each layer.     

Poly[tetra‐μ‐aqua‐hexa­aquadi‐μ3‐malon­ato‐dinitratodibarium(II)nickel(II)]

The title complex, [Ba₂Ni(C₃H₂O₄)₂(NO₃)₂(H₂O)₁₀]_n, has a two‐dimensional layer structure. The Ni atom lies on a crystallographic centre of symmetry in an octa­hedral NiO₆ environment, and is coordinated by four malonate O atoms in a planar arrangement and by two water mol­ecules in axial positions. The coordination of the unique Ba atom involves two nitrate O atoms, five water mol­ecules and three malonate O atoms.     

Poly[aqua‐μ3‐2,2‐dimethyl­malonato‐zinc(II)]

The title complex, [Zn(C₅H₆O₄)(H₂O)]_n, has a two‐dimensional layer structure. The Zn atoms, in a geometry that is closer to trigonal bipyramidal than square pyramidal, are coordinated by two O atoms of a bidentate dimethyl­malonate ligand, two O atoms of monodentate dimethylmalonate ligands and one O atom from the aqua ligand. The crystal structure is characterized by the intra­layer motif of a hydrogen‐bonded network. Neighboring layers are linked together to build up a three‐dimensional network via van der Waals forces.     

catena‐Poly[[[tetra­aqua­zinc(II)]‐μ‐4,4′‐bipyridine] bis­(4‐hydroxy­benzene­sulfonate) trihydrate]

In the title compound, {[Zn(C₁₀H₈N₂)(H₂O)₄](C₆H₅O₄S)₂·3H₂O}_n, the Zn atom, the bipyridine ligand and one of water mol­ecules are located on twofold rotation axes. The Zn atom is coordinated by four O atoms from four water mol­ecules and two N atoms from two 4,4′‐bipyridine mol­ecules in a distorted octa­hedral geometry. The Zn²⁺ ions are linked by the 4,4′‐bipyridine mol­ecules to form a one‐dimensional straight chain propagating along the c axis. The 4‐hydroxy­benzene­sulfonate counter‐ions are bridged by the solvent water mol­ecules through hydrogen bonds to generate a two‐dimensional layer featuring large pores. In the crystal packing, the intra­layer pores form one‐dimensional channels along the c axis, in which the one‐dimensional [Zn(C₁₀H₈N₂)(H₂O)₄]²⁺ chains are encapsulated. Electrostatic inter­actions between cations and anions and extensive hydrogen bonds result in a three‐dimensional supra­molecular structure.     

Poly[(N,N‐dimethylformamide‐κO)(μ3‐4,4′‐ethylenedibenzoato‐κ5O,O′:O′:O′′,O′′′)(pyrazino[2,3‐f][1,10]phenanthroline‐κ2N8,N9)lead(II)]

In the title Pb^II coordination polymer, [Pb(C₁₆H₁₀O₄)(C₁₄H₈N₄)(C₃H₇NO)]_n, each Pb^II atom is eight‐coordinated by two chelating N atoms from one pyrazino[2,3‐f][1,10]phenanthroline (L) ligand, one dimethylformamide (DMF) O atom and five carboxylate O atoms from three different 4,4′‐ethylenedibenzoate (eedb) ligands. The eedb dianions bridge neighbouring Pb^II centres through four typical Pb—O bonds and one longer Pb—O interaction to form a two‐dimensional structure. The C atoms from the L and eedb ligands form C—H...O hydrogen bonds with the O atoms of eedb and DMF ligands, which further stabilize the structure. The title compound is the first Pb^II coordination polymer incorporating the L ligand.     

Poly[[[tri(urea‐κO)manganese(II)]‐μ‐thiocyanato‐κ2N:S‐mercury(II)]‐tri‐μ‐tetrathiocyanato]

The title complex, [MnHg(SCN)₄(CH₄N₂O)₃]_n, consists of slightly distorted octahedral MnN₃O₃ and tetrahedral HgS₄ units. The Mn^II atom is coordinated by the O atoms of three urea mol­ecules and by the N atoms of three SCN^? ions; Hg^II is coordinated by four S atoms from SCN^? ions. Each pair of Mn^II and Hg^II atoms is connected by an –SCN– bridge, forming infinite two‐dimensional –Mn—NCS—Hg– networks.     

Poly[(μ5‐3‐carboxybenzene‐1,2‐dicarboxylato)lead(II)]: a helical lead(II) coordination polymer

In the title polymer, [Pb(C₉H₄O₆)]_n, the asymmetric unit contains a monomer of a Pb^II cation with a doubly deprotonated 3‐carboxybenzene‐1,2‐dicarboxylate dianion (1,2,3‐Hbtc²⁻). Each Pb^II centre is seven‐coordinated by seven O atoms of bridging carboxy/carboxylate groups from five 1,2,3‐Hbtc²⁻ ligands, forming a distorted pentagonal bipyramid. The Pb^II cations are bridged by 1,2,3‐Hbtc²⁻ anions, yielding two‐dimensional chiral layers. The layers are stacked above each other to generate a three‐dimensional supramolecular architecture via a combination of C—H...O interactions. The thermogravimetric and optical properties are also reported.     

catena‐Poly[4,4′‐bipyridinium [[cis‐di­chloro­manganese(II)]‐di‐μ‐chloro]], a novel manganese(II) coordination polymer with 4,4′‐bipyridinium

The title novel manganese(II) coordination polymer, {(C₁₀H₁₀N₂)[MnCl₄]}_n, consists of a one‐dimensional infinite zigzag chain composed of polymeric [MnCl₄]²⁻ units in which each Mn²⁺ ion is located on a twofold rotation axis and is coordinated to two terminal Cl atoms and four bridging chloro ligands. Adjacent Mn²⁺ ions are linked by double Cl bridges arranged about a centre of inversion, thus forming anionic chains of distorted edge‐sharing octa­hedra. Rows of approximately parallel 4,4′‐bipyridinium cations run side‐by‐side with the MnCl₄ chains. A two‐dimensional layer structure is constructed via hydrogen bonds and by additional π–π stacking inter­actions.     

A three‐dimensional PbII coordination framework: poly[[μ4‐(E)‐2,2′‐(diazene‐1,2‐diyl)dibenzoato]dimethanollead(II)]

In the title coordination polymer, [Pb(C₁₄H₈N₂O₄)(CH₃OH)₂]_n, the asymmetric unit contains half of a Pb^II cation, half of a 2,2′‐(diazene‐1,2‐diyl)dibenzoate dianionic ligand (denoted L²⁻) and one methanol ligand. Each Pb^II centre is eight‐coordinated by six O atoms of chelating/bridging carboxylate groups from four L²⁻ ligands and two O atoms from two terminal methanol ligands, forming a distorted dodecahedron. The [PbL₂(MeOH)₂] subunits are interlinked via the sharing of two carboxylate O atoms to form a one‐dimensional [PbL₂(MeOH)₂]_n chain. Adjacent chains are further connected by L²⁻ ligands, giving rise to a two‐dimensional layer, and these layers are bridged by L²⁻ linkers to afford a three‐dimensional framework with a 4¹²6³ topology.     

Bis(μ‐2‐sulfonatobenzoato)bis[(1,10‐phenanthroline)­lead(II)] dihydrate

In the title centrosymmetric dimer, [Pb₂(sbc)₂(phen)₂]·2H₂O [sbc is the 2‐sulfonatobenzoate dianion (C₇H₄O₅S) and phen is 1,10‐phenanthroline (C₁₂H₈N₂)], each Pb^II ion is six‐coordinated by four O atoms, viz. carboxyl­ate and sulfonate O atoms from two sbc anions, and two N atoms from a 1,10‐phenanthroline ligand. One 1,10‐phenanthroline ligand and the carboxyl­ate group of one sbc ligand are chelated to each Pb^II cation, and the sulfonate group of the other sbc unit is monodentate. One O atom of the chelated carboxyl­ate group also bridges to the other Pb^II cation, so that each pair of Pb^II ions is bridged by two sbc anions and has the same coordination environment, forming a dinuclear ring. Each pair of Pb^II ions is thus connected by two different kinds of bridges, namely a carboxyl­ate short bridge and a carboxyl­ate–sulfonate long bridge. There is also a special position of site symmetry at the centre of the two Pb^II cations.