Five new organotin(IV) complexes of composition [Bz 2 SnL 1 ] n ( ), 3 H⋅H O] [Me ⋅H 4 ) and H] 5 (where L = (2 S )‐2‐{[( E )‐(4‐hydroxypentan‐2‐ylidene)]amino}‐4‐methylpentanoate, rac )‐1‐(2‐hydroxyphenyl)methylidene]amino}‐4‐methylpentanoate )‐ or )‐1‐(2‐hydroxyphenyl)ethylidene]amino}‐4‐methylpentanoate) were synthesized characterized using H NMR, 13 C 119 Sn NMR infrared spectroscopic techniques. The crystal structure reveals a distorted trigonal‐bipyramidal geometry around the tin atom...

2,5-Pyridinedicarboxylic acid has been reacted with three different diorganotin(IV) oxides (R = Me, nBu, Ph) to study the molecular and supramolecular structures of resulting 2,5-pyridinedicarboxylates. It found that coordinating solvent molecules can change structure completely. The are either polymeric (zigzag) or cyclotrimeric; arrangements include (i) systems having only loosely bound discrete (van der Waals contacts), (ii) a 2D 3D hydrogen-bonded structure, (iii) coordination structure....

Chemistry that holds water: A honeycomblike water sheet having a hitherto unknown structure is described. The crystal lattice of bulk in the presence 1,4-phenylenediboronic acid (see picture) contains hexameric rings with chair and boat conformations. hydrogen-bonding pattern completely elucidated gives two different motifs for each three independent hydrogen-bonded rings. Supporting information this article available on WWW under http://www.wiley-vch.de/contents/jc_2002/2004/z53957_s.pdf or...

It is well-known that the structures of trialkyltin(IV) carboxylates can be either monomeric, polymeric, or cyclooligomeric in solid state. In contrast, all dialkyltin(IV) dicarboxylates characterized so far state have monomeric polymeric structures, however, for some cases it has been proposed their solution-state structure cyclooligomeric. order to generate more information on this subject, dimethyl- and di-n-butyltin(IV) complexes with phthalic isophthalic acid prepared analyzed both...

The hole story: A microporous material with cavities that have an internal volume of 1850 Å3 has been formed from simple starting materials by combining them first through covalent coordination, and then hydrogen-bonding interactions. capsules in the 3D network can function as hosts for guest molecules such triphenylmethane, sodium tetraphenylborate, triptycene (see picture). Supporting information this article is available on WWW under...

The combination of racemic praziquantel, (RS)-PZQ, with aliphatic dicarboxylic acids the homologous series HOOC–(CH2)n–COOH (with n = 0–8) and unsaturated analogues succinic acid as cocrystal formers via liquid-assisted grinding provided a total nine 1:1 2:1 cocrystals oxalic acid, malonic (two polymorphic phases), maleic fumaric glutaric adipic pimelic acid. cocrystalline phases were identified first by XRPD analysis then structurally characterized IR spectroscopy and, far possible,...

Praziquantel (PZQ) is an important chiral active pharmaceutical ingredient for the treatment of gastrointestinal parasites, which commercially available only in form its racemate. In this article, on basis co-crystallization experiments a convenient two-step protocol resolution RS-PZQ described. Screening with using liquid-assisted grinding technique revealed formation diastereomeric co-crystal pair l-malic acid (l-MA) compositions R-PZA:l-MA and S-PZQ:l-MA. Both co-crystals have been...

Abstract B←N coordination supports a [2+2] photodimerization in the solid state. The bond is defined by an orthogonal interaction between stilbazole and phenylboronic ester to enable stereocontrolled rapid photoreaction. cyclobutane photoproduct affords novel diboron bis‐tweezer adduct that used separate mixture of benzene thiophene upon crystallization.

Dicationic N-methylated at pyridyl or quinolyl moieties derivatives of three isomers N,N′-bis(pyridyl)pyridine-2,6-dicarboxamide (o-, m-, and p-1) N,N′-bis(3-quinolyl)pyridine-2,6-dicarboxamide (4) strongly bind anions in MeCN (log K the range 3.5−6.5) with pronounced selectivity for Cl− also neutral urea amide guests log 1.1−2.8. Crystal structures triflate salts m-1, p-1, 4 show that NH pyridinium o-CH groups are directed inside receptor cleft their four protons forming a circle radius ca....

A total of 20 co-crystal formers have been combined with acetazolamide (ACZ) via solvent drop grinding in acetone, acetonitrile, and water. The screening experiments provided co-crystals 4-hydroxybenzoic acid (4HBA) nicotinamide (NA) (ACZ-4HBA ACZ-NA-H2O), which were identified by X-ray powder diffraction (XRPD) further characterized IR spectroscopy differential scanning calorimetry-thermogravimetric analysis (DSC-TGA). Both could be prepared also neat (NG) reaction crystallization (RC)....

Ten neutral monomeric, dimeric and polymeric mercury(II) complexes of compositions HgX(2)L (3, 8), [HgX(2)L](2) (1, 2, 4-6 7), [Hg(NO(3))(2)L](n) (9) {[Hg(N(3))(2)L](2)}(n) (10) where X = chloride, bromide, iodide, nitrate azide, L (E)-N-(pyridin-2-ylmethylidene)arylamine, are described. Compounds 1-10 were characterized by elemental analyses, IR (1)H NMR spectroscopic studies. The solution-state photophysical properties the highly dependent on anions as seen in fluorescence emission...

The combination of two heteroaromatic boronic acids with pentaerythritol gave self-complementary tectons which were suitable for the generation 2D and 3D molecular networks.

The hydrogen-bonding interaction energies have been computed for a series of five homo- and heterodimers formed between boronic acids, carboxylic carboxylate anions using ab initio methods at the MP2/6-31G(d,p) level. results show that stability these systems decreases in following direction: RB(OH)2···-OOCR > RCOOH···-OOCR >> RCOOH···HOOCR RB(OH)2···HOOCR RB(OH)2···(HO)2BR; (R = Me, Ph). Five crystals containing acids prepared characterized both solution solid-state spectroscopic as well...

The one pot reaction of salicylaldehyde 1, β-amino alcohols 2a−2c, and di-n-butyltinIV oxide 3a or diphenyltinIV 3b produced five diorganotinIV compounds, 4a−4c, 5a, 5c, in good yields. All compounds were characterized by IR, 1H, 13C, 119Sn NMR spectroscopy, elemental analysis; furthermore, 4b, 4c, 5c X-ray diffraction analysis. After the structural characterization, all tested vitro against Bacillus subtilis (Gram-positive, strain ATCC 6633), Escherichia coli (Gram-negative, DH5α),...

4,4′-Bipyridine has been combined with boric acid and four different boronic acids (1,3- 1,4-benzenediboronic acid, 3-aminophenylboronic 4-acetylphenylboronic acid) to give 1:1 (with 1:2 adducts arylboronic acids), which have characterized by X-ray diffraction analysis. The supramolecular solid-state structures are composed of hydrogen-bonded networks (B)O−H···N, (B)O−H···O, C−H···O, C−H···N, C−H···π, π···π C−H···B interactions. comparative analysis the boric/boronic acid−4,4′-bipyridine...

The dimethyl-, di-n-butyl-, and diphenyltin(IV) dithiocarbamate (dtc) complexes [{R2Sn(L-dtc)}x] 1−7 (1, L = L1, R Me; 2, n-Bu; 3, L2, Me, x ∞; 4, 5, L3, 2; 6, n-Bu, 7, Ph, 2) have been prepared from a series of secondary amino acid (AA) homologues as starting materials: N-benzylglycine (α-AA derivative L1), N-benzyl-3-aminopropionic (β-AA L2), N-benzyl-4-aminobutyric (γ-AA L3). resulting compounds characterized by elemental analysis, mass spectrometry, IR NMR (1H, 13C, 119Sn) spectroscopy,...

Dicationic N-methylated at quinolyl moieties derivatives of three isomers N,N′-bis(quinolyl)pyridine-2,6-dicarboxamide, and respective N-methyl quinolinium benzamides as reference compounds, have been prepared characterized by crystal structures, spectral acid–base properties in water. First pKa values dicarboxamides between 8.1 9.3 determined spectrophotometrically are unusually low for amides. Dicarboxamide 3- (1) 6-aminoquinoline (2) undergo efficient fluorescence quenching halide,...

A series of 2:1 fluorinated arylboronic ester adducts with 4,4′-bipyridine sustained by N→B dative bonds have been synthesized. The degree fluorination in the esters derived from catechol is shown to modulate molecular conformation coordinated boronic moieties and intermolecular interactions means C–H···F F···F contacts that sustain crystal lattices. adduct 2,4-difluorophenylboronic acid was chosen examine formation inclusion complexes a large number aromatic guests, affording solvates,...

Combination of nitazoxanide (NTZ) with a total 32 cocrystal formers gave cocrystals succinic acid (NTZ-SUC, 2:1) and glutaric (NTZ-GLU, 1:1). Additionally, 2,5-dihydroxybenzoic provided solvate acetonitrile (NTZ-25DHBA-CH3CN, 1:1:1). All solid phases were characterized by X-ray powder diffraction analysis, IR spectroscopy, thermogravimetric differential scanning calorimetry, single-crystal analysis. Single-crystal crystallography revealed that NTZ the carboxylic linked in all three through...

ABSTRACT Metal coordination compounds based on organic dithiocarbamate ( dtc ) ligands have been extensively studied in the past and are still under current research. For many years, center of attention was transition metal derivatives, but more recently also, main group f ‐group elements attracting interest, mainly because important applications perspectives agriculture, pharmaceutical medicinal chemistry, mining industry, materials science, supramolecular chemistry (self‐assembly...