Hossein Eshtiagh-Hosseini

Ferdowsi University Of Mashhad | FUM · Department of Chemistry

In this paper we report the successful hydrothermal synthesis of the two inorganic-organic hybrid assemblies H0.87{Na(H2O)3[Dy(PDA)(H2O)2]3(BW12O40)0.87(SiW12O40)0.13}•11H2O (1) and H0.87{Na(H2O)3[Ho(PDA)(H2O)2]3 (BW12O40) 0.87(SiW12O40)0.13}•10H2O (2) (H2PDA = 1,10-phenanthroline-2,9-dicarboxylic acid). Both hybrids have been characterized using e...

A novel inorganic-organic hybrid, {Na[Tb(L)(H2O)4]3(SiW12O40)}·4H2O, in which L = 4-hydroxypyridine-2,6-dicarboxylic acid (chelidamic acid), was prepared and characterized by elemental analyses, Fourier transform infrared spectroscopy, and single-crystal X-ray diffraction. It consists of a trinuclear terbium cluster bonded to a Keggin-type polyoxot...

The cover image is based on the Full Paper An inorganic–organic hybrid material based on a Keggin‐type polyoxometalate@Dysprosium as an effective and green catalyst in the synthesis of 2‐amino‐4H‐chromenes via multicomponent reactions by Sara Hosseinzadeh‐Baghan et al., https://doi.org/10.1002/aoc.5793.

A novel inorganic–organic hybrid, [Dy4(PDA)4(H2O)11(SiMo12O40)]·7H2O denoted as (POM@Dy‐PDA), based on a lanthanide cluster, a Keggin‐type polyoxomolybdate, and PDA (1,10‐phenanthroline‐2,9‐dicarboxylic acid) was prepared and fully characterized by elemental analysis, Fourier‐transform infrared and UV–Vis spectroscopies, thermogravimetric analysis,...

The embedding of molecular metal oxides, or polyoxometalates (POMs), in metal-organic frameworks (MOFs) opens new research avenues in catalysis and beyond. This Review explores the host-guest chemistry of POMs embedded in MOF hosts, and discusses the synergism of the resulting composites for heterogeneous catalysis. The Review focuses on well-estab...

A facile, efficient and eco‐friendly catalytic protocol was developed for the synthesis of medicinally important pyran‐annulated heterocycles via multicomponent reaction (MCR). Cyclocondensation of differently substituted aromatic aldehydes, malononitrile/ethyl cyanoacetate and various β‐dicarbonyl compounds in the presence of Ag3[PMo12O40]⋅nH2O as...

A new inorganic–organic hybrid based on an aspartate functionalized poly­oxomolybdate, [penta­aqua­cobalt(II)]-μ-aspartate-[γ-octa­molybdate]-μ-as­partate-[penta­aqua­cobalt(II)] tetrahydrate, [Co2(C4H6NO4)2(γ-Mo8O26)(H2O)10]·4H2O (1), has been synthesized under hydro­thermal conditions from the reaction of an Evans–Showell-type polyoxometalate, (N...

Two coordination complexes, [Mn2(pydco)2(phen)2(H2O)2]·2H2O (1) and [Mn(3-pyco)2(H2O)4] (2), based on Mn(II), pyridine-2,5-dicarboxylic acid N–oxide (H2pydco) and 1,10-phenanthroline (phen) as organic ligands have been synthesized and characterized by elemental analyses, infrared spectroscopy and single crystal X-ray diffraction. We have synthesize...

Two lanthanoid-based inorganic-organic hybrids, [Nd4(PDA)4(H2O)9(SiW12O40)]·5H2O (1), (PDA = deprotonated preorganized 1,10-phenanthroline-2,9-dicarboxylic acid) and [Gd(PCA)3(H2O)2]2 [HSiW12O40]2·10H2O (2), (PCA = pyridine-4-carboxylic acid) have been hydrothermally synthesized utilizing the [SiW12O40]⁴⁻ Keggin-type polyoxometalate as a building b...

The first example of hydrogen evolution reactivity (HER) of lanthanide-functionalized Keggin-based polyoxotungstates under photochemical and electrochemical conditions is reported. The HER activity under homogeneous, visible light-driven conditions and under heterogeneous,...

In this research, two new coordination complexes {[Ni(but-1,4-dc)0.5(N3)(H2O)]·3H2O}n (1) and {[Cu(bpc)(N3)(H2O)]·H2O}n (2) were synthesized from butane-1,4-dicarboxylate (but-1,4-dc) or benzophenone-2-carboxylate (bpc) and N3⁻ ligands. Further, the effectiveness of sonochemistry synthesis for the preparation of nanosheets of these compounds and th...

A new chiral inorganic-organic hybrid with the formula (L-His)2(H7CoMo6O24)·6H2O (1), based on natural amino acid and Anderson type polyoxomolybdate was synthesized through mild condition. The chiral L-histidine molecules induced chirality to the whole structure through various types of strong and unconventional hydrogen bond (HB) interactions (CH⋯...

One of the most attractive areas in inorganic chemistry is the synthesis of polyoxometalates (POMs) exhibiting new properties and applications. Since the impact of POMs in biochemistry and related fields of research has increased in last years, there is a special interest in this topic. Significant progress in biological applications has been made...

Crystal engineering has recently emerged as a method of choice for the design and construction of organic as well as metal-organic functional materials. Crystal engineering attempts to establish packing trends in whole families of compounds and seeks to establish connections between structure and function. The utility of crystal engineering has als...

In this paper, we have synthesized two new coordination complexes and two new coordination polymers at room temperature formulated as}(Htata)2[Cu(pydco)2(tata)]·3H2O{ (1), {(H9a-acr)2·[Ni0.51Zn0.49(pydco)2(H2O)2]·4H2O} (2),] Cu(pydco)(H2O)2[n (3), [Ag(Hpydco)(2a-pym)]n (4) in which pydco = pyridine-2,6-dicarboxylic acid N-oxide, tata = 2,4,6-triami...

A new cobalt (II) coordination compound was synthesized using proton transfer mechanism. The reaction between CoCl2·2H2O, Salicylic acid (H2Sal) and acridine (Acr) gave a new coordination compound formulated as (HAcr)4[Co(Sal)3], which was characterized by elemental analysis, NMR, IR and UV/Vis spectroscopies. The interaction of this complex with D...

A family of lanthanide-based inorganic-organic hybrids, [Ce4(PDA)4(H2O)9(SiW12O40)]·6H2O (1),[Nd5(PDA)5(H2O)13(OH)(SiW12O40)]·8H2O (2), [Sm3(PDA)2(H2O)13(OH)(SiW12O40)]·16.5H2O (3), [Dy4(PDA)4(H2O)11(SiW12O40)]·7H2O (4) (PDA: 1,10-phenanthroline-2,9-dicarboxylic acid), has been hydrothermally synthesized utilizing the [SiW12O40]4 Keggin-type anion...

Zinc(II) and copper(II) complexes containing Schiff base, 2- methoxy-6((E)-(phenylimino) methyl) phenol ligand (HL) were synthesized and characterized by elemental analysis, IR, NMR, and single crystal X-ray diffraction technique. The fluorescence properties and quantum yield of zinc complex were studied. Our data showed that Zn complex could bind...

A new mixed ligand complex of Co(II), [Co(pydc)(2-apym)(H2O)2]·H2O (1) (pydcH2=pyridine-2,6-dicarboxylic acid, 2-apym=2-aminopyrimidine) has been synthesized and characterized by CHN micro analysis, IR and UV spectroscopies, TGA and single crystal X-ray diffraction. The crystallographic data show that the compound 1 crystallizes in monoclinic syste...

A newly synthesized Schiff base 3,3c-dihydroxy-4,4c-[4,4c-diphenylmethanebis(nitrilomethyl-idyne)]-bis-phenol is characterized experimentally. Also, the geometry optimization for the tautomers, tautomerism and assignment of the IR bands and NMR chemical shifts of the Schiff base were performed using the DFT method. Good consistency between the theo...

As part of ongoing studies of the effects of O-donor ligands based on pyridine-2,6-dicarboxylic acid N-oxide on the geometry, topology and dimensionality of their metal complexes, the salt (H9a-acr)2(pydco)·2H2O (1) and two new coordination complexes with formulas, {(H9a-acr)2[Cu(pydco)2(H2O)2]·4H2O} (2), and {(H9a-acr)2[Ni(pydco)2(H2O)2]·4H2O} (3)...

Currently, the design and assembly of hybrid inorganic-organic compounds has become an area of rapid growth due to their structural diversities as molecular building blocks. Polyoxometalates (POMs) as a subset of metal oxides, that represent a tremendous range of inorganic clusters with unique physical and chemical performances, possess intriguing...

A newly synthesized Schiff base 3,3′-dihydroxy-4,4′-[4,4′-diphenylmethanebis(nitrilomethylidyne)]-bisphenol is characterized experimentally. Also, the geometry optimization for the tautomers, tautomerism and assignment of the IR bands and NMR chemical shifts of the Schiff base were performed using the DFT method. Good consistency between the theore...

(H4a-dmpy)[Cr(Hcda)2]∙4H2O (1), (H2a-4,6-dmpym)[Cr(Hcda)2]∙3H2O2a-4,6-dmpym (2) and [M(Hcda)(H2O)3]∙H2O (3) and (4) (M = CoII and NiII, respectively), and (H2a-4mpy)2[FeCl3(pydc)].3H2O (5); (H3cda = 4-hydroxypyridine-2,6-dicarboxylate or chelidamic acid; 4a-dmpy = 4-aminodimethylpyridine; 2a-4,6-dmpym= 2-amino-4,6-dimethylpyrimidine; 2a-2mpy = 2-a...

Supplementary material 1 Electronic supplementary information (ESI) available: All spectroscopic data together with route synthesis.

In the title compound, [Cu(C7H3N2O4)(C4H5N2)(H2O)], (I), pyridine-2,6-di­car­box­ylate (pydc²⁻), 2-aminopyrimidine and aqua ligands coordinate the CuII centre through two N atoms, two carboxylate O atoms and one water O atom, respectively, to give a nominally distorted square-pyramidal coordination geometry, a common arrangement for copper complexe...

Four new supramolecular coordination complexes and salts based on proton-transferred pyridine-2,6-dicarboxylic acid N-oxide formulated as (Htata)(Hpydco)·H2O (1), (Htata)2(pydco)·2H2O (2), (H9a-acr)2[Zn(pydco)2(H2O)2]·4H2O (3), and (H9a-acr)2[Co(pydco)2(H2O)2]·4H2O (4) (where H2pydco = pyridine-2,6-dicarboxylic acid N-oxide, tata = 2,4,6-triamino-1...

In this paper, we report the synthesis and characterization of a novel hybrid inorganic–organic structure formulated as [[Nd2(L1)2(L2)(H2O)7][H2SiW12O40]]n.4H2O (1), in which HL1= nicotinic acid and H2L2=2–hydroxynicotinic acid. Interestingly, L1 and L2 are generated from an in situ transformation of the original ligand, pyridine–2,3–dicarboxylic a...

Two chromium (III) complexes with pyridine-2,6-dicarboxylate ligand have been synthesized with various cations yielding new compounds: (2a4mpy)2[Cr(pydc)2]2 · 9H2O (I) and (bphda)[Cr(pydc)2]2 · DMF · 4H2O (II) where pydc = pyridine-2,6-dicarbocylate anion, 2a4mpy = 2-amino-4-methylpyrimidinium cation and bphda = 1,1′-bisphenyl-4,4′-diaminium cation...

To examine the influence of the metal ions and their counter ions on crystalline networks, we have designed and synthesized six MX2/8-aminoquinoline (8-aq) (M = MnII, CuII, CdII and X = Cl-, Br-, I-, NO3-, SCN-) complexes, having the formula [Mn(8-aq)2 I2]•(1), [Mn(8-aq)2 (H2O)2](8-aq)3•Br2 (2), [Mn(8-aq)2(SCN)2] (3), [Cu(8-aq)2Cl(H2O)]•Cl•H2O (4),...

A new pyrazine-bridged binuclear Cu(II) complexes with formulae of [Cu2(chel)2(pyz)(H2O)4], (1, pyz = pyrazine, H2chel = chelidamic acid), has been synthesized and characterized by elemental analyses, IR spectroscopy and solution studies. Hydrogen bonding and CO⋯π interactions link the binuclear Cu(II) complex generating the 3D infinite network. Th...

The 19 new inorganic–organic hybrid compounds based on Keggin, Preyssler and Wells–Dawson types of tungstoheteropolyanions and fairly complete series of essential amino acids were prepared and the structure of these materials investigated on the basis of CHN analysis and multi-spectroscopic investigations (IR, 1HNMR and 13CNMR). Changes in position...

Regioselective displacement reaction of ammonia with 5-bromo-2,4-dichloro-6-methylpyrimidine was studied by X-ray crystallography analysis and showed the formation of 5-bromo-2-chloro-6-methylpyrimidin-4-amine as a main product. Reaction of the latter compound with secondary amines in boiling ethanol afforded 4-amino-5-bromo-2-substituted aminopyri...

Hydrothermal synthesis of two novel inorganic–organic hybrid assemblies, {Na[Ln(pydc-OH)(H2O)4]3}[SiW12O40]·15H2O [Ln = Nd (1) and Ln = Sm, (2); pydc-OH = 4-hydroxypyridine-2,6-dicarboxy], and their characterization is described. Structural characterizations by single-crystal X-ray diffraction reveal that these compounds are isostructural, and each...

At present, research into polyoxometalates (POMs) is a hot topic in many scientific fields, mainly because of their vast range of potential applications. Recently, the coordination ability of POMs has attracted the attention of the scientific community because it allows them to behave as unusual inorganic ligands. A direct consequence of this abili...

Three Cu and one Co complexes of three pyridine-2,6-dicarboxylic acid derivatives were synthesized by proton transfer reactions. They are formulated as {Cu[(ampym)(hypydc)(H2O)]}·H2O (1), {[Co(pyzdc)(H2O)2]·H2O}n (2), [Cu(dipic)(μ-dipic)Cu(II)(H2O)5]·2H2O (3) and [Cu3(dipic)4(en)2]·enH2·4H2O (4) where ampym = 2-amino-4-methylpyrimidine, hypydc-4-hy...

Five new proton transfer compounds, (Hapy)[Cr(pydc)2]·5H2O·[pydcH2] (1), (Hacr)[Cr(pydc)2]·2H2O (2), (H9a-acr)[Cr(pydc)2]·4.27H2O (3), [Co(pydc)(pydcH2)]·3H2O (4) and [Ni(pydcH)2]·H3O·2H2O (5) (where pydcH2 = pyridine-2,6-dicarboxylic acid; apy = 2-aminopyridine; acr = acridine and 9a-acr = 9-aminoacridine) have been synthesized and characterized b...

Blocking the division of tumor cells by small-molecules is currently of great interest for the design of new antitumor drugs. The interaction of a new metal complex with DNA was investigated through several techniques. Absorption spectroscopy and gel electrophoresis studies on the interaction of the Cu-complex of (2a-4mpyH)2 [Cu(pyzdc)2 (H2O)2].6 H...

Quantitative structure activity relationship (QSAR) for the anticancer activity of Fe(III)-salen and salen-like complexes was studied. The methods of density function theory (B3LYP/LANL2DZ) were used to optimize the structures. A pool of descriptors was calculated: 1497 theoretical descriptors and quantum-chemical parameters, shielding NMR, and ele...

(H9a-Acr)2[Ni(hypydc)2]·4H2O (1), (H9a-Acr)2[Co(hypydc)2]·3H2O (2), (H9a-Acr) [Cr(hypydc)2]·3H2O (3), and (H9a-Acr)2[Cd(hypydc)2]·3H2O (4) compounds (H2hypydc = 2,6-dicarboxy-4-hydroxypyridine or chelidamic acid; 9a-Acr = 9-aminoacridine) were synthesized via proton transfer and characterised by elemental analysis, IR spectroscopy, and single cryst...

A newly synthesized Schiff base, 3,3'-Dihydroxy-4,4'-[5-methyl-1,3-phenylenebis(nitrilomethylidyne)]-bis-phenol, was characterized experimentally. Its geometries optimization, tautomerization, assignment of the IR bands and NMR chemical shifts were calculated by using density functional theory (DFT) method. In addition, the Atoms in molecules (AIM)...

This paper is a density functional theory (DFT) calculation of intramolecular proton transfer (IPT) in 6-hydroxypicolinic acid (6HPA, 6-hydroxypyridine-2-carboxylic acid) tautomeric forms. The transition state for the enol-to-keto transition is reported in the gas phase and in four different solvents. The planar and non-planar dimer forms of 6HPA k...

In this paper we report the synthesis and X-ray characterization of four novel hybrid inorganic-organic assemblies generated from H4SiW12O40 as Keggin-type polyoxometalates (POM) and, in three of them, a trinuclear lanthanide cluster of type {Na(H2O)3[Ln(HCAM)(H2O)3]3}(4+) is formed, where Ln metal is La in compound , Ce in compound , and Eu in com...

In this work, structures of the native (Amyl-C) and truncated Taka amylase were compared by molecular modeling methods. Using in silico enzyme engineering approach, 50 (Amyl-S1) and 100 (Amyl-S2) amino acids were eliminated from Amyl-C to produce the truncated forms. Analysis of the tertiary structures showed that three essential domains of the enz...

Thermal instability of the industrial enzymes such as nitrile hydratase is a major problem in biotechnology. Insolubility of hydrophobic substrate of such enzymes in aqueous solvents is another problem. Enzymatic reactions in hydrophobic non-aqueous solvents may be a solution for these problems. Here, using molecular dynamic simulation it is shown...

A new Schiff base ligand N,N′-bis(2,4-dihydroxybenzylidene)-1,2-diaminobenzene [=H2L] and its Cu(II) complex [Cu(L)] are synthesized and characterized by IR, UV-Vis, NMR, mass spectrometry and elemental analysis. Also, the computational prediction of optimized geometries, IR spectra and NMR chemical shifts is performed using the density functional...

In this work, a 3,3′-dihydroxy-4,4′-[1,2-cyclohexanediyl-bis(nitrilomethylidyne)]-bis-phenol [=H2L] Schiff-base ligand and its Mn(II) complex [Mn(L)(H2O)2] are newly synthesized and characterized by elemental analysis, IR and NMR spectroscopies. Also the geometry optimizations, assignment of the IR bands and NMR chemical shifts are computed using t...

4-Hy­droxy­pyridine-2,6-di­carb­oxy­lic acid (chelidamic acid, hypydc[H]H2) reacts with MnCl2·2H2O in the presence of piperazine in water to afford the title complex, {[Mn3(C7H2NO5)2(H2O)8]·3H2O}n or {[Mn3(hypydc)2(H2O)8]·3H2O}n. This compound is a one-dimensional coordination polymer, with the twofold symmetric repeat unit containing three metal c...

The mixed-amide phosphinates, rac-phenyl (N-methyl­cyclo­hexyl­amido)(p-tolyl­amido)­phosphinate, C20H27N2O2P, (I), and rac-phenyl (allyl­amido)(p-tolyl­amido)­phosphinate, C16H19N2O2P, (II), were synthesized from the racemic phosphorus–chlorine compound (R,S)-(Cl)P(O)(OC6H5)(NHC6H4-p-CH3). Furthermore, the phosphorus–chlorine compound ClP(O)(OC6H5...

Different transition metal coordination compounds based on py-2,5-dcH2 have been synthesised, i.e. (H2-a-4-mpym)2[Zn(py-2,5-dc)2(H2O)2] (1), (H9-aacr)2[Zn(py-2,5-dc)2(H2O)2]·4H2O (2), (H9-aacr)2[Ni(py-2,5-dc)2(H2O)2]·2H2O (3), (H9-aacr)2[Cu(py-2,5-dc)2(H2O)]·H2O·DMF (4), and (H9-aacr)3[Cr(CN)4(py-2,5-dc)]·5H2O (5), starting from two proton-transfer...

Bis[S-allyl-β-N-(benzylidene)dithiocarbazato]copper(II) complex was grafted into SiO2 matrix. Heterogenized catalyst was characterized by FT-IR, SEM, EDX TEM, N2 absorption and atomic absorption spectroscopy (AAS) and its catalytic performance in the oxidation of alcohols was investigated. The experimental results showed that the prepared heterogen...

This paper is a density functional theory (DFT) calculation of intramolecular proton transfer (IPT) in 6-hydroxypicolinic acid (6HPA, 6-hydroxypyridine-2-carboxylic acid) tautomeric forms. The transition state for the enol -to- keto transition is reported in the gas phase and in four different solvents. The planar dimer of 6HPA keto forms and nonpl...

The organic–inorganic hybrid of citric acid, tetraethoxysilane (TEOS), and triethylphosphate (TEP) doped by a nickel Schiff-base complex was prepared by sol–gel method. The prepared composites were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), transmittance electron microscopy (TEM), scanning tunnelling microscopy (S...

In the title hydrated mixed-cation salt, (C5H8N3)2[Co(H2O)6](SO4)2·2H2O, the complete octa­hedral hexa­aqua complex cation is generated by crystallographic inversion symmetry. In the crystal, the components are linked by O—H⋯O and N—H⋯O hydrogen bonds, the latter, involving pyrimidinium cations and sulfate anions, generating R 2 2(8) loops. These,...

Because of special importance of hydrogen bond in the non-bonded interaction potential between two ionic liquid's parts is decided to investigate hydrogen bonding in these compounds. Two overviews are chosen to explain the hydrogen bonding in five different popular imidazolium based ionic liquids; EMI-TFSI, EMI-ES, EMI-Lactate, EMI-NO3 and EMI-PF6....

To investigate the effect of counterions on crystalline networks, we have designed and synthesized a series of HgII complexes, [Hg(8-aq)Cl2] (1), [Hg(8-aq)Br2] (2) and [Hg5(8-aq)2I10]n (3), via a reaction between 8-aminoquinoline (8-aq) with HgX2 (X = Cl, Br, I). They have been characterized by elemental analyses, IR, 1H- and 13C-NMR spectroscopy a...

The intramolecular proton transfer (IPT) reaction and dimerization processes of dipicolinic acid (DPA) have been investigated using density functional theory (DFT) at the B3LYP/6-31G++(d) basis set level. The influence of the solvent on the zwitterion -to- neutral transition of DPA was examined using the continuum model (CPCM) with different dielec...

This work investigates the supramolecular aggregation of Cu(II) complexes based on a combination of the heterocyclic N-donor ligand 2-aminopyrimidine (2-apym) and a variety of different carboxylate ligands, like salicylic acid (H2SAL), maleic acid (H2MAL), and glycine (HGLY). Four new Cu(II) complexes [Cu(HSAL)2(2-apym)2] (I), [Cu(HSAL)2(2-apym)2]·...

A novel supramolecular structure of an s-Block metal ion, Ca(II) atom, formulated as (pnH2)2au][Ca2(H2O)2(Hhypydc)4]·4H2O (1), was synthesized and characterized by elemental analysis, IR, 1H and 13C NMR spectroscopies and single crystal X-ray diffraction. Compound 1 is a member of a large family of supramolecular metallic compounds recently derived...

A new rapid, simple and effective cleanup procedure is demonstrated for the determination of ibuprofen, naproxen and diclofenac in urine samples by using hollow-fiber liquid membrane-protected solid-phase microextraction (HFLM-SPME) based on sol-gel technique and gas chromatography-flame ionization detector (GC-FID). In this technique, a sol-gel co...

A 1D metal-organic framework with two symmetry-independent heptacoordinated MnII atoms stitched by centrosymmetric octamer water clusters is reported.

A simple, sensitive, and accurate method for the determination of methyl tert-butyl ether (MTBE) in water samples has been developed based on headspace solid-phase microextraction (HS-SPME) followed by gas chromatography-flame ionization detection (GC-FID). A sol–gel based coating fiber using poly(ethylene glycol) (PEG) grafted onto multi-walled ca...

In continuation of our previous brief review of structural concepts of novel supramolecular proton transfer compounds and their metal complexes by Aghabozorg et al. [1], we briefly surveyed the current research in the field of proton transfer compounds supramolecular synthons and their self-assembled metallic complexes from the points of view of Cr...

A novel coordination polymer of zinc(II) atom, [(pipzH2)[Zn(pyzdc)2].6H2O]n (1) (H2pyzdc and pipz are pyrazine-2,3- dicarboxylic acid and piperazine, respectively), was successfully synthesized under hydrothermal conditions and structurally characterized by means of elemental analysis, FTIR, TGA and SEM. Polymer 1 was further structurally character...

In this work, we report the design and synthesis of two 1D-coordination polymers under ambient condition namely {[H2-apy]2[Cu(pyzdc)2]}n (1) and {[Hbmpa]2[Cu(pyzdc)2]·2H2O}n (2), which have been prepared by the reaction between CuCl2·2H2O, 1,4-pyrazine-2,3-dicarboxylic acid (H2pyzdc) and 2-aminopyridine (2-apy) or 5-bromo-6-methyl-2-(4-methylpipera...

The asymmetric unit of the title complex, (C6H8N)2[Cu(C7H3NO4)2]·6H2O, contains half a copper(II)–dipicolinate complex located on a twofold rotation axis, one protonated aniline mol­ecule and three solvent water mol­ecules. The CuII atom is coordinated by four O atoms and two N atoms from two dipicolinate ligands in a distorted octa­hedral environm...

Co(III) salen complex with N,N'-dipyridoxyl (1,4-butanediamine) Schiff-base ligand as tetradentate ligand was synthesized and characterized by the elemental and spectroscopic analysis. The interaction of this complex with calf thymus DNA (ct DNA) has been investigated in vitro using UV absorption, fluorescence spectroscopy, thermal denaturation and...

The asymmetric unit of the title compound, (C(13)H(11)N(2))[Fe(C(7)H(3)NO(4))(2)]·4H(2)O, contains a 9-amino-acridinium cation, one anionic complex and four uncoordinated water mol-ecules. In the anionic complex, the Fe(III) ion is six-coordinated by two almost perpendicular [dihedral angle = 88.78 (7)°] pyridine-2,6-dicarboxyl-ate ligands in a dis...

Two novel chiral organic–inorganic hybrid materials based on two important heteropolyoxometallate namely Preyssler and Wells–Dawson anions, (Hval)2(Hgly)(H3O)6K5[Na(H2O)P5W30O110]·19.5H2O (1) and (Hpro)6[P2W18O62]·8H2O (2), were prepared and characterized by elemental analysis, X-ray diffraction, and infrared spectroscopy. The mixed amino acid as c...

The asymmetric unit of the title compound, (C13H11N2)[Fe(C7H3NO4)2]·4H2O, contains a 9-amino­acridinium cation, one anionic complex and four uncoordinated water mol­ecules. In the anionic complex, the FeIII ion is six-coordinated by two almost perpendicular [dihedral angle = 88.78 (7)°] pyridine-2,6-dicarboxyl­ate ligands in a distorted octa­hedral...

The solvated hybrid material [C2H6NO2]3[(PO4)W12O36].5H2O was synthesized from glycine and an a-Keggin polyoxo anion under normal conditions.

Phosphoryl donor (PO) ligands (tBuNH)3PO (1), (C6H5CH2NH)3PO (2) and (4-NO2–C6H4C(O)NH)(OC4H8N)2PO (3) were used for the preparation of new organotin(IV) complexes Cl2Me2Sn(PO)2 (4–6). The environment at the nitrogen atom in the phosphoramide ligand is almost planar and it does not take part in hydrogen bonding as an acceptor in complexes 4–6, refl...

In the title compo