Amine-controlled assembly of metal-sulfite architecture from 1D chains to 3D framework

Organically templated inorganic-organic hybrid metal (Zn and Cd) Sulfite-oxalates with layered and three-dimensional structures

We report single crystal X-ray investigations of three d¹⁰ metal based oxalate-sulfite inorganic-organic hybrid open framework materials, namely [Zn₂(SO₃)₂(C₂O₄)_0.5(C₆N₂H₁₃)]·(H₂O)₂, 1, [C₄N₂H₁₂]_0.5[Zn₂(SO₃)₂(C₂O₄)_0.5(H₂O)₂], 2 and [C₄N₂H₁₂][Cd₂(SO₃)₂(C₂O₄)(H₂O)]·H₂O, 3 which show layered and three dimensional structures with different organic templates. These materials were synthesized under hydrothermal conditions and characterized by techniques such as single crystal X-ray diffraction, dipole moment calculations, FTIR, powder X-ray diffraction (PXRD), thermogravimetric analysis (TGA) and differential scanning calorimetry (DSC). The common feature for 1 and 2 is the interconnection of embedded zinc-sulfite chains via oxalate anions in the framework and in 3, cadmium-oxalate chains are interconnected via sulfite anions. The coordination geometries of metal(ii) ions vary significantly resulting in a ladder-like layered structure in the case of 1, a 3D framework in case of 2 and a layered structure with an embedded one-dimensional channel in 3. The observed structures can also be partly attributed to the influence exerted by the presence of different structure directing agents (SDA) in the lattice. The dipole moments for metal polyhedra 1, 2 and 3 were calculated from bond valence analyses and are 2.39 D for Zn(1)O₄N polyhedra and 1.66 D for Zn(2)O₄ polyhedra in 1, 24.90 D for Zn(1)O₆ and 29.52 D for Zn(2)O₄ in 2 and 5.82 D for Cd(1)O₇ and 2.90 D for Cd(2)O₆ in 3.

Novel amine templated three-dimensional zinc-organophosphonates with variable pore-openings

Amine templated three-dimensional zinc-organophosphates with different ring sizes have been obtained by varying the organic amine molecules. The figure shows the various net structures obtained during the study.

The first organically templated open-framework metal-sulfites with layered and three-dimensional diamondoid structures

The crystallographic signatures and characterization data of two novel organically templated open-framework zinc-sulfite (NH₃CH₂CH₂NH₃)[Zn₃(SO₃)₄], 1 and (CN₃H₆)₂[Zn(SO₃)₂], 2 are reported for the first time using different amines to generate 2D (for 1) and 3D (for 2) assemblies with 4, 6, 8 and 12-membered rings.

Multicomponent self-assembly of a pentanuclear Ir–Zn heterometal–organic polyhedron for carbon dioxide fixation and sulfite sequestration

An iridium-containing pentanuclear metal–organic polyhedron was constructedviaa subcomponent self-assembly. The three equatorial Zn(ii) ions in the structure induced atmospheric carbon dioxide transformation as carbonate and sulfur dioxide as sulfite with bonding to the three metal centers.

H-bond supported coordination polymers of transition metal sulfites with different dimensionalities

Three novel transition metal–sulfite coordination complexes are synthesized using different amines and the role of H-bonding to provide structures with different dimensionalities are discussed.

Organically templated linear metal sulfites

Six novel organically-templated linear metal sulfite coordination polymers based on Zn(ii) and Mn(ii) ions are synthesized using different amines and the role of H-bonding to provide structures with increased dimensionalities are discussed.

Bis[tris(propane-1,3-diamine-κ(2) N,N')-nickel(II)] di-aqua-bis(propane-1,3-di-amine-κ(2) N,N')nickel(II) hexa-bromide dihydrate

In the title compound, [Ni(C₃H₁₀N₂)₃]₂[Ni(C₃H₁₀N₂)₂(H₂O)₂]Br₆·2H₂O, one Ni²⁺ cation, located on an inversion centre, is coordinated by four N atoms from two ligands and by two water O atoms. The other Ni²⁺ cation, located in a general position, is coordinated by six N atoms from three ligands. In both cases, the Ni²⁺ cation has an octa­hedral coordination environment. The overall structural cohesion is ensured by three types of hydrogen bonds, N—H⋯Br, O—H⋯Br and O—H⋯O, which connect the two types of complex cations, the bromide counter-anions and the lattice water molecules into a three-dimensional network.

2-Amino-5-methyl-pyridinium nitrate

In the title salt, C₆H₉N₂⁺·NO₃⁻, the 2-amino-5-methyl­pyridinium cation and the nitrate anion are cyclically linked through pyridinium and amine N—H⋯O hydrogen bonds [graph set R₄³(12)]. These units are extended into a zigzag chain structure lying parallel to the a axis, through a second cyclic R₂²(8) association involving amine N—H⋯O and aromatic C—H⋯O hydrogen bonds to nitrate O-atom acceptors.

2-Amino-5-chloro-pyridinium nitrate

The title structure, C(5)H(6)ClN(2) (+)·NO(3) (-), is held together by extensive hydrogen bonding between the NO(3) (-) ions and 2-amino-5-chloro-pyridinium H atoms. The cation-anion N-H⋯O hydrogen bonds link the ions into a zigzag- chain which develops parallel to the b axis. The structure may be compared with that of the related 2-amino-5-cyano-pyridinium nitrate.

2-Amino-5-cyano-pyridinium nitrate

In the title compound, C₆H₆N₃⁺·NO₃⁻, the packing is consolidatedby N—H⋯N and N—H⋯O hydrogen bonds.

4-Benzhydryl-1-cinnamylpiperazin-1-ium nitrate

In the title compound, C₂₆H₂₉N₂⁺·NO₃⁻, the dihedral angle formed by the phenyl rings of the benzhydryl group is 66.18 (9)°. Crystal cohesion is enforced by cation–anion C—H⋯O and N—H⋯O hydrogen bonds.

2-Cyano-anilinium nitrate

In the title compound, C₇H₇N₂⁺·NO₃⁻, all atoms of the cation, with the exception of two H atoms of the NH₃ group, lie on a mirror plane, while the anion lies across this plane with the N and one O atom on the mirror plane. In the crystal structure, the organic cations and NO₃⁻ anions are linked by N—H⋯N and N—H⋯O hydrogen bonds, forming a two-dimensional network parallel to (100).

3-Cyano-anilinium chloride

In the title salt, C₇H₇N₂⁺·Cl⁻, all non-H atoms of the cation are essentially coplanar (r.m.s. deviation = 0.005 Å). In the crystal structure, the organic cations and chloride ions are linked to form a two-dimensional network parallel to the (001) plane by N—H⋯Cl hydrogen bonds.

2-Amino-5-cyano-pyridinium chloride

In the crystal structure of the title compound, C₆H₆N₃⁺·Cl⁻, cohesion is maintained by cation–anion N—H⋯Cl and cation–cation N—H⋯N hydrogen bonds, which link the ions into a three-dimensional network.