2D-Coordination Polymer Containing Interconnected 82-Membered Organotin Macrocycles

A two-dimensional coordination polymer [(<i>n</i>-Bu₃Sn)₄(μ-L)₂(4,4′-bipy)]_<i>n</i> (<b>1</b>) was prepared in a reaction between (<i>n</i>-Bu₃Sn)₂O, (<i>E</i>)-5-(pyridin-4-yl-methyleneamino)­isophthalic acid (LH₂), and 4,4′-bipyridine (4,4′-bipy). The structure of <b>1</b> is built by the interlinking of 82-membered macrocyles. The generation of the 2D coordination polymer is facilitated by the multisite coordination capability of the dianionic ligand (L^2–) as well as involvement of 4,4′-bipyridine as an ancillary ligand

Two-Dimensional Homometallic- to a Three Dimensional Heterometallic Coordination Polymer: A Metalloligand Approach

A metalloligand type of synthetic route has been followed to generate a novel heterometallic three-dimensional (3D)-coordination polymer containing Cu­(II) and trimethyltin as nodes. The first step of this synthetic path consisted of the preparation of a two-dimensional-coordination polymer of Cu­(II), [Cu­(μ-LH)₂]_<i>n</i> (<b>1</b>) (LH₂ = pyridine-2,5-dicarboxylic acid). The reaction of in situ generated <b>1</b> with Me₃SnCl afforded the heterometallic 3D-coordination polymer, [Cu­(Me₃Sn)₂(μ-L)₂]_<i>n</i> (<b>2</b>). The latter is a 4,4-connected polymer with a <i>sqc</i> topology. This 3D-framework contains a paddle-wheel-shaped core comprised of two heterometallic (Cu^II/Sn^IV) macrocycles

2D-Coordination Polymer Containing Interconnected 82-Membered Organotin Macrocycles

A two-dimensional coordination polymer [(<i>n</i>-Bu₃Sn)₄(μ-L)₂(4,4′-bipy)]_<i>n</i> (<b>1</b>) was prepared in a reaction between (<i>n</i>-Bu₃Sn)₂O, (<i>E</i>)-5-(pyridin-4-yl-methyleneamino)­isophthalic acid (LH₂), and 4,4′-bipyridine (4,4′-bipy). The structure of <b>1</b> is built by the interlinking of 82-membered macrocyles. The generation of the 2D coordination polymer is facilitated by the multisite coordination capability of the dianionic ligand (L^2–) as well as involvement of 4,4′-bipyridine as an ancillary ligand

Synthesis of One- and Two-Dimensional Coordination Polymers Containing Organotin Macrocycles. Reactions of (<i>n</i>-Bu₃Sn)₂O with Pyridine Dicarboxylic Acids. Structure-Directing Role of the Ancillary 4,4′-Bipyridine Ligand

The reaction of (<i>n</i>-Bu₃Sn)₂O with pyridine-2,6-dicarboxylic acid (<b>L1H</b>_<b>2</b>) in a 1:1 ratio resulted in the formation of a one-dimensional (1D) coordination polymer [(<i>n</i>-Bu₃Sn)₂(<i>n</i>-Bu₂Sn)₂(μ-L1)₂(μ-OH)₂]_<i>n</i> (<b>1</b>). The formation of <b>1</b> is accompanied by a <i>Sn</i>–<i>butyl</i> bond cleavage reaction involving half of the organotin units. The formation of the 1D coordination polymer is facilitated by the multisite coordination capability of the dianionic ligand L1. The reaction of (<i>n</i>-Bu₃Sn)₂O with pyridine-2,5-dicarboxylic acid (<b>L2H</b>_<b>2</b>) or pyridine-3,5-dicarboxylic acid (<b>L3H</b>_<b>2</b>), on the other hand, results in the generation of the two-dimensional (2D) coordination polymers [(<i>n</i>-Bu₃Sn)₂(μ-L2)]_<i>n</i> (<b>2</b>) and [(<i>n</i>-Bu₃Sn)₄(μ-L3)₂]_<i>n</i> (<b>3</b>), respectively. The formation of <b>2</b> and <b>3</b> emphasizes the importance of the relative orientation of the coordinating units in the multisite coordination ligand. Compounds <b>1</b>–<b>3</b> show a rich supramolecular architecture in their solid state as a result of multiple secondary interactions. Investigation of the fate of the reactions of (<i>n</i>-Bu₃Sn)₂O with pyridine dicarboxylic acids in the presence of a bridging ligand was carried out. In all the cases when the reactions were carried out in the presence of 4,4′-bipyridine (4,4′-bipy), 1D coordination polymers [(<i>n</i>-Bu₃Sn)₂(μ-L1)­(μ-4,4′-bipy)]_<i>n</i> (<b>4</b>), [(<i>n</i>-Bu₃Sn)₂(μ-L3)­(μ-4,4′-bipy)]_<i>n</i> (<b>5</b>), and [(<i>n</i>-Bu₃Sn)₂(μ-L2)­(μ-4,4′-bipy)]_<i>n</i> (<b>6</b>) are formed. In these cases, the 4,4′-bipyridine ligand serves as one of the connectors that link the organotin units. Interestingly, in the presence of 4,4′-bipyridine, <i>Sn</i>–<i>butyl</i> bond cleavage does not take place. While the 1D coordination polymers <b>4</b> and <b>5</b> form three-dimensional supramolecular architectures in their solid state, compound <b>6</b> possesses a 2D supramolecular architecture

Reactions of (<i>E</i>)‑5-(Pyridin-4-yl-methyleneamino)isophthalic Acid (LH₂) with Triorganotin Oxides and −Chloride. Formation of One-Dimensional- and Two-Dimensional-Coordination Polymers

The reaction of (<i>n</i>-Bu₃Sn)₂O with (<i>E</i>)-5-(pyridin-4-yl-methyleneamino)­isophthalic acid (LH₂) in a stoichiometric ratio of 1:1 resulted in the formation of a 2D coordination polymer [(<i>n</i>-Bu₃Sn)₂(μ-L)]_<i>n</i> (<b>1</b>). The structure of <b>1</b> contains a 36-membered macrocycle as its repeating building block. The reactions of Me₃SnCl or (Ph₃Sn)₂O with LH₂, on the other hand, result in the generation of [(Me₃Sn)₂(μ-L)­(H₂O)]_<i>n</i> (a neutral 1D coordination polymer) (<b>2</b>) and [(Ph₃Sn)­(μ-L)­(Et₃NH)]_<i>n</i> (an anionic 1D coordination polymer) (<b>3</b>), respectively. Compounds <b>1</b>–<b>3</b> show a rich supramolecular architecture in their solid state as a result of multiple secondary interactions

A Hexameric Hexagonal Organotin Macrocycle. Supramolecular Entrapment of an Iodide–Iodide Short Contact

A hexanuclear hexagonal organotin macrocycle [(<i>n</i>-Bu₃Sn)₆­(μ-L)₆(I^–)₂­(MeOH)₆] (<b>1</b>) was synthesized in a 1:1 reaction of (<i>n</i>-Bu₃Sn)₂O and 4,5-dicarboxy-1,3-dimethyl-1<i>H</i>-imidazol-3-ium iodide (LH₂I). The molecular structure of <b>1</b> reveals that it is a 42-membered hexatin macrocycle possessing a <i>C</i>₃ (pseudo-<i>S</i>₆) symmetry. The alternate up–down arrangement of imidazolium units allows the molecule to assume a <i>chair</i> topology. The hexagonal packing of these macrocycles, in the solid-state, results in nanoscale one-dimensional channels which entrap two I^– ions in close proximity (∼3.7 Å) as a result of various supramolecular interactions

Synthesis, Structure, and H₂/CO₂ Adsorption in a Three-Dimensional 4‑Connected Triorganotin Coordination Polymer with a sqc Topology

A 4-connected triorganotin 3D coordination polymer in a sqc topology has been shown to possess 1D microchannels along its crystallographic <i>a</i> axis. This main-group-element-containing framework structure shows selective gas adsorption, preferring CO₂ and H₂ over N₂

Polymeric, Molecular and Ionic Organotin Complexes Containing Hypoxanthine, Adenine and 2‑Aminopurine. Synthesis and Supramolecular Structures

The reaction of L1H [L1H = 3-(N9-hypoxanthyl)­propanoic acid] with Me₃SnCl or (<i>n</i>-Bu₃Sn)₂O afforded the 1D coordination polymers [Me₃Sn­(L1)]<i>_n</i> (<b>1</b>) and [<i>n</i>-Bu₃Sn­(L1)]<i>_n</i> (<b>2</b>), respectively. A similar reaction between L2H [3-{N9-(2-amino­purinyl)}­propanoic acid] with (Ph₃Sn)₂O in a 2:1 ratio afforded a dimer [(L2)­(Ph₃Sn)­L2­{Ph₃Sn­(H₂O)}]·​3CH₃OH·​3H₂O (<b>3</b>). The reactions of 2-(N9-adeninyl)­acetic acid (L3H) and 3-(N9-adeninyl)­propanoic acid (L4H) with (Ph₃Sn)₂O in a 2:1 ratio afforded insoluble intractable products, which, upon addition of dilute HCl in methanol, afforded [{Ph₂SnCl₃­(H₂O)}­(HL3Me)₂Cl]·​H₂O (<b>4</b>) and [(Ph₂SnCl₄)­(HL4Me)₂] (<b>5</b>). Complexes <b>1</b>–<b>5</b> show an extensive supramolecular organization in the solid state as a result of several intermolecular interactions, prominent among which are the interactions between the nucleobases

A Hexameric Hexagonal Organotin Macrocycle. Supramolecular Entrapment of an Iodide–Iodide Short Contact

A hexanuclear hexagonal organotin macrocycle [(<i>n</i>-Bu₃Sn)₆­(μ-L)₆(I^–)₂­(MeOH)₆] (<b>1</b>) was synthesized in a 1:1 reaction of (<i>n</i>-Bu₃Sn)₂O and 4,5-dicarboxy-1,3-dimethyl-1<i>H</i>-imidazol-3-ium iodide (LH₂I). The molecular structure of <b>1</b> reveals that it is a 42-membered hexatin macrocycle possessing a <i>C</i>₃ (pseudo-<i>S</i>₆) symmetry. The alternate up–down arrangement of imidazolium units allows the molecule to assume a <i>chair</i> topology. The hexagonal packing of these macrocycles, in the solid-state, results in nanoscale one-dimensional channels which entrap two I^– ions in close proximity (∼3.7 Å) as a result of various supramolecular interactions

Synthesis, Structure, and H₂/CO₂ Adsorption in a Three-Dimensional 4‑Connected Triorganotin Coordination Polymer with a sqc Topology

A 4-connected triorganotin 3D coordination polymer in a sqc topology has been shown to possess 1D microchannels along its crystallographic <i>a</i> axis. This main-group-element-containing framework structure shows selective gas adsorption, preferring CO₂ and H₂ over N₂