Poly[penta-μ-aqua-μ6-methyl­ene­disulfonato-μ5-methyl­enedisulfonato-tetra­sodium(I)]

The title compound, [Na4(CH2O6S2)2(H2O)5]n, was crystallized from an aqueous solution. The sodium ions are surrounded and bridged by O atoms from coordinated water mol­ecules and sulfonate ions in a three-dimensional neutral network. The crystal structure is also stabilized by an intricate system of hydrogen bonds

Hydrogen bis­[2-(4-ammonio­phen­oxy)acetate] triiodide

In the title compound, C16H19N2O6 +·I3 −, the carboxyl­ate groups of a pair of (4-amino­phen­oxy) acetate ligands are bridged by an H atom in a rather classical configuration. The H atom is located on an inversion center and the pair of carboxyl­ate groups are centrosymmetrically related with an O⋯O distance of 2.494 (5) Å. The I3 − anion is also located on an inversion center. In the crystal, N—H⋯O and N—H⋯I hydrogen-bond inter­actions build up a three-dimensionnal network

Formation and structural chemistry of the unusual cyanide-bridged dinuclear species [Ru-2(NN)(2)(CN)(7)](3-)(NN=2,2 '-bipyridine or 1,10-phenanthroline)

Crystallisation of simple cyanoruthenate complex anions [Ru(NN)(CN)(4)](2) (NN = 2,2'-bipyridine or 1,10-phenanthroline) in the presence of Lewis-acidic cations such as Ln(III) or guanidinium cations results, in addition to the expected [Ru(NN)(CN)(4)](2) salts, in the formation of small amounts of salts of the dinuclear species [Ru-2(NN)(2)(CN)(7)](3). These cyanide-bridged anions have arisen from the combination of two monomer units [Ru(NN)(CN)(4)](2) following the loss of one cyanide, presumably as HCN. The crystal structures of [Nd(H2O)(5.5)][Ru-2(bipy)(2)(CN)(7)] center dot 11H(2)O and [Pr(H2O)(6)][Ru-2(phen)(2)(CN)(7)] center dot 9H(2)O show that the cyanoruthenate anions form Ru-CN-Ln bridges to the Ln(III) cations, resulting in infinite coordination polymers consisting of fused Ru(2)Ln(2)(mu-CN)(4) squares and Ru(4)Ln(2)(mu-CN)(6) hexagons, which alternate to form a one-dimensional chain. In [CH6N3](3)[Ru-2(bipy)(2)(CN)(7)] center dot 2H(2)O in contrast the discrete complex anions are involved in an extensive network of hydrogen-bonding involving terminal cyanide ligands, water molecules, and guanidinium cations. In the [Ru-2(NN)(2)(CN)(7)](3) anions themselves the two NN ligands are approximately eclipsed, lying on the same side of the central Ru-CN-Ru axis, such that their peripheries are in close contact. Consequently, when NN = 4,4'-Bu-t(2)-2,2'-bipyridine the steric bulk of the t-butyl groups prevents the formation of the dinuclear anions, and the only product is the simple salt of the monomer, [CH6N3](2)[Ru((t)Bu(2)bipy)(CN)(4)] center dot 2H(2)O. We demonstrated by electrospray mass spectrometry that the dinuclear by-product [Ru-2(phen)(2)(CN)(7)](3) could be formed in significant amounts during the synthesis of monomeric [Ru(phen)(CN)(4)](2) if the reaction time was too long or the medium too acidic. In the solid state the luminescence properties of [Ru-2(bipy)(2)(CN)(7)](3) (as its guanidinium salt) are comparable to those of monomeric [Ru(bipy)(CN)(4)](2), with a (MLCT)-M-3 emission at 581 nm

Packing Similarities and Synthon Variabilities in Aminopyridinium Sulfoisophthalates

Different salts of 5-sulfoisophthalic acid with aminosubstituted monocyclic Lewis bases, 2-aminipyridine, 3-aminopyridine, 4-aminopyridine, 2,6-diaminopyridine, have been prepared and studied by means of X-ray crystallography, Fourier transform infrared and Raman spectroscopy, and thermogravimetric–differential thermal analysis and differental scanning calorimetry methods. The crystal networks have been analyzed in view of competitive hydrogen bond interactions issued between multiple functional groups in different topological and stoichiomeric combinations allowing for formation of variable synthons. A statistical analysis of the most prominent homo- and heteromeric motifs, which can be formed between the functional groups, has been performed with the use of the Mercury Solid Form module in order to look for preferred interactions in extended network formation. Eighteen different synthons are used in the presented crystal networks, some of which are really prolific and others are unique. The role of water molecule for the network formations using four different water synthons is also elucidated

New Heterometallic Hybrid Polymers Constructed with Aromatic Sulfonate-Carboxylate Ligands: Synthesis, Layered Structures, and Properties

Three novel alkali metal–cadmium coordination polymers [K₂Cd­(Hsb)₄(H₂O)₆]_3<i>n</i> <b>1</b>, [NaCd­(sip)­(DMF)₂(H₂O)₂]_2<i>n</i> <b>2</b>, and [NaCd₂(sip)₂(DMF)₂(H₂O)₂]_2<i>n</i>·2<i>n</i>Hdeta·2<i>n</i>H₂O <b>3</b> (H₂sb = 4-sulfobenzoic acid, H₃sip = 5-sulfoisophthalic acid) have been synthesized and characterized by single crystal X-ray diffraction and spectroscopic and thermogravimetric methods. The solid state structure of <b>1</b> consists of inorganic layers, formed from Na₂O₁₀ and CdO₆, polyhedral units, bridged via the sulfonate site of the ligand. The layers are pillared by the organic portions of the ligands to form a three-dimensional framework classified as I²O¹. Compounds <b>2</b> and <b>3</b> display inorganic–organic hybrid layers arranged in 3D via nonspecific (hydrophobic) interactions between the DMF ligands. The two-dimensional frameworks of the layers are classified as I¹O¹ (in <b>2</b>) and I⁰O² (in <b>3</b>). The guest diethylammonium ions in <b>3</b> are arranged in hydrophobic channels along the [011] crystallographic direction and circumvented by the DMF ligands

Design, synthesis and noncentrosymmetric solid state organization of three novel pyridylphosphonic acids

Three pyridylphosphonic acids, 3-pyridylphosphonic acid 1, 5-(dihydroxyphosphoryl)nicotinic acid 2, and 3,5-pyridinediyldiphosphonic acid 3, were synthesized and structurally investigated by solid state FT-IR and single crystal X-ray diffraction methods