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article

Fullerene recognition by 5-nitro-11,17,23,29-tetramethylcalix[5]arene

Karolína Flídrová, Alan Liška, Jiří Ludvík, Václav Eigner, more

Tetrahedron Letters > 2015 > 56 > 12 > 1535-1538

The condensation of different building blocks allows the synthesis of an electrochemically active 5-nitro-11,17,23,29-tetramethylcalix[5]arene that was designed to study fullerene complexation using cyclic voltammetry. Although this method was ultimately unsuccessful, the formation of complexes between the calix[5]arene derivative and C ₆₀ or C ₇₀ fullerenes in solution was proved...

article

Catalytic features and crystal structure of a tau class glutathione transferase from Glycine max specifically upregulated in response to soybean mosaic virus infections

Katholiki Skopelitou, Abdi W. Muleta, Anastassios C. Papageorgiou, Evangelia Chronopoulou, more

BBA - Proteins and Proteomics > 2015 > 1854 > 2 > 166-177

The plant tau class glutathione transferases (GSTs) play important roles in biotic and abiotic stress tolerance in crops and weeds. In this study, we systematically examined the catalytic and structural features of a GST isoenzyme from Glycine max (GmGSTU10-10). GmGSTU10-10 is a unique isoenzyme in soybean that is specifically expressed in response to biotic stress caused by soybean mosaic virus (SMV)...

article

First synthesis and characterization of SRR/RSS-Ezetimibe

Yun Ren, RenJun Li, Yong Deng, Mei Guan, more

Tetrahedron Letters > 2013 > 54 > 48 > 6443-6446

The two stereoisomers, SRR-Ezetimibe 2 and RSS-Ezetimibe 3 are related substances of the cholesterol absorption inhibitor drug Ezetimibe 1. Herein, we present an efficient and practical synthesis approach to deliver these two stereoisomers for the first time, and a proof of SRR-Ezetimibe 2 by single-crystal X-ray analysis. Our research will be of immense help for organic chemists to study the impurity...

article

Crystallographic and magnetic studies of the 2-pyridone/copper halide system

Kelley C. Shortsleeves, Mark M. Turnbull, Christopher B. Seith, Emilia N. Tripodakis, more

Polyhedron > 2013 > 64 > Complete > 110-121

A series of copper halide complexes have been prepared employing 2-pyridone as a ligand. The compounds [CuBr ₂ (2-pyridone) ₂ ] ₂ (1), [CuCl ₂ (2-pyridone) ₂ ] ₂ (2), [CuCl ₂ (2-pyridone)] ₂ (3), [CuCl ₂ (2-pyridone) ₃ ] (4), and [CuCl ₂ ·2H ₂ O] ₂ [(2-pyridone) ₂ ] (5) were prepared and...

article

1,8‐Diarylnaphthalenes: Synthesis, Properties, and Applications

Anna V. Gulevskaya, Eugeny A. Ermolenko

European Journal of Organic Chemistry > 2022 > 48 > n/a - n/a

1,8‐Diarylnaphthalenes are a fascinating example of strained organic molecules that have found many practical applications due to unusual parallel face‐to‐face arrangement of two peri‐aryl rings in close proximity almost perpendicular to the central naphthalene backbone. 1,8‐Diarylnaphthalenes show notable potential as photoluminescent and chiral sensors, stereodynamic switches, nonlinear optic chromophores,...

article

Na₇RbTl₄ – A New Ternary Zintl Phase Containing [Tl₄]⁸⁻ Tetrahedra

Vanessa F. Schwinghammer, Melissa Janesch, Nikolaus Korber, Stefanie Gärtner

Zeitschrift für anorganische und allgemeine Chemie > 648 > 24 > n/a - n/a

Na₇RbTl₄ has been prepared by solid state reaction from the elements. Single crystal X‐ray structure analysis suggested the presence of pseudo‐merohedral twinning. The final model could be derived in space group Pbam (a=16.3584(4) Å, b=16.3581(4) Å, c=11.3345(3) Å, V=3033.04(14) Å³, R₁/wR₂ 0.0282/0.0402) and proved the presence of isolated [Tl₄]⁸⁻ anions, which are only known from two other solid...

article

Cover Feature: Monomeric Magnesium Catalyzed Alkene and Alkyne Hydroboration (Chem. Eur. J. 56/2022)

Rohit Kumar, Sayan Dutta, Vishal Sharma, Praval P. Singh, more

Chemistry – A European Journal > 28 > 56 > n/a - n/a

From traditional to sustainable: Catalysts with platinum‐group metals are well‐established in the field of hydroboration of C−C multiple bonds. However, the current mantra in catalysis is to employ “cheap metals for noble tasks”. In this regard, we have developed a bis(phosphino)carbazolido magnesium‐methyl complex as a catalyst for the hydroboration of alkenes, alkynes, and biologically essential...

article

Monomeric Magnesium Catalyzed Alkene and Alkyne Hydroboration

Rohit Kumar, Sayan Dutta, Vishal Sharma, Praval P. Singh, more

Chemistry – A European Journal > 28 > 56 > n/a - n/a

In this work, two monomeric magnesium alkyl complexes (1 and 2) were prepared using bis(phosphino)carbazole framework and among them 1 has been used as a catalyst for hydroboration of alkenes and alkynes with pinacolborane (HBpin). A broad variety of aromatic and aliphatic alkenes and alkynes were efficiently reduced. Anti‐Markovnikov regioselective hydroboration of alkenes and alkynes was achieved,...

article

Single Crystal X‐Ray Structure Analyses of Binary and Ternary Compounds A₄₉Tl_108+x (A=K, Rb, Cs; x=0–1.76) Related to the K₄₉Tl₁₀₈ Type Structure

Vanessa F. Schwinghammer, Melissa Janesch, Florian Kleemiss, Stefanie Gärtner

Zeitschrift für anorganische und allgemeine Chemie > 648 > 10 > n/a - n/a

The structural chemistry of alkali metal thallides shows a broad range of type structures. At an alkali metal : thallium proportion A : Tl 1 : 2 the perceived dependency on the alkali metal involved is conspicuous. Two main structure types are reported with A₁₅Tl₂₇ (A=K, Rb, Cs) and K₄₉Tl₁₀₈. The compound K₄₉K₁₀₈ with a 3‐dimensional Tl‐substructure has been known since 1993 from Cordier and Müller...

article

Hexanuclear Niobium Cluster Iodides with Pyridine Ligands – Temperature Induced Auto‐Oxidation

Florian Schröder, Martin Köckerling

Zeitschrift für anorganische und allgemeine Chemie > 648 > 4 > n/a - n/a

The cluster compounds [Nb₆I₈Py₆] and [Nb₆I₈Py₆]I ⋅ 9Py, both with octahedral Nb₆ metal atom cores, were obtained from the reaction of [Nb₆I₁₁] with pyridine (Py). Both compounds are rare examples of iodide supported hexanuclear cluster compounds, which are obtained through solvent‐based chemical reactions. The Nb₆ cluster core is surrounded by μ₃‐bridging iodido and apical‐bonded pyridine ligands...

article

Syntheses, Structures and Cytotoxicity of Cu(II) Complexes with α‐Amino acid derived Benzamidines

Canh Dinh Le, Chien Thang Pham, Hung Huy Nguyen

Zeitschrift für anorganische und allgemeine Chemie > 648 > 4 > n/a - n/a

N‐(diethylthiocarbamoyl)benzimidoyl chloride reacts with methyl esters of glycine, L‐alanine, L‐valine under formation of pro‐ligands 1 which undergo de‐esterification in reactions with Cu(CH₃COO)₂ and finally form complexes 2 with the compositions of [{Cu(L‐gly)}₄] (2 a), [{Cu(L‐ala)}_∞] (2 b) and [{Cu(L‐val)}_∞] (2 c). In all complexes, Cu(II) ion is coordinated by a dianion {L²⁻} via its (O,N,S)...

article

A Molecular Analogue of the C−H Activation Intermediate of the Silica‐Supported Ga(III) Single‐Site Propane Dehydrogenation Catalyst: Structure and XANES Signature

Lukas Rochlitz, Keith Searles, Darryl F. Nater, Scott R. Docherty, more

Helvetica Chimica Acta > 104 > 7 > n/a - n/a

Propane dehydrogenation is an important field of research due to an increasing world‐wide demand of propene while classical production routes through naphtha cracking are in decline. In that context, silica‐supported Ga(III) sites, synthesized from surface organometallic chemistry principles, show high selectivity and stability in the propane dehydrogenation reaction. This performance is in significant...

article

Zinc Substitution of Cobalt in Vitamin B₁₂: Zincobyric acid and Zincobalamin as Luminescent Structural B₁₂‐Mimics

Christoph Kieninger, Joseph A. Baker, Maren Podewitz, Klaus Wurst, more

Angewandte Chemie International Edition > 58 > 41 > 14568 - 14572

Replacing the central cobalt ion of vitamin B₁₂ by other metals has been a long‐held aspiration within the B₁₂‐field. Herein, we describe the synthesis from hydrogenobyric acid of zincobyric acid (Znby) and zincobalamin (Znbl), the Zn‐analogues of the natural cobalt‐corrins cobyric acid and vitamin B₁₂, respectively. The solution structures of Znby and Znbl were studied by NMR‐spectroscopy. Single...

article

Synthesis, structure and solid-state electrical conductivity of bis(1,2-diphenylethylene-1,2-dithiolate)nickel(II)

Arghya Dutta, Arnab Chatterjee, Kishalay Bhar, Anindita Banerjee, more

Journal of Chemical Sciences > 2019 > 131 > 8 > 1-7

One nickel(II)-dithiolene complex bis(1,2-diphenylethylene-1,2-dithiolate)nickel(II) has been synthesized and crystallographically characterized. The complex is square planar at its metal centre. The compound in its solid-state is found to conduct electricity at room temperature. Variation of conduction is also found on raising the temperature. Instead of a metal…metal orbital overlap, the electron...

article

Towards the synthesis of piano-stool iron complexes mediated by S-alkyl selenothiocarbonato ligands and their substitution reactions

Mohammad El-khateeb, Hassan Abul-Futouh, Helmar Görls, Wolfgang Weigand

Monatshefte für Chemie - Chemical Monthly > 2019 > 150 > 8 > 1461-1467

The S-alkyl selenothiocarbonato iron complexes of the general formula CpFe(CO)₂SeC(O)SR (R = Et, n-Pr, i-Pr) are made by the reactions of (µ-Se)[FeCp(CO)₂]₂ and S-alkyl chlorothioformates RSC(O)Cl. The CO-substitution reactions of CpFe(CO)₂SeC(O)SEt with triphenylphosphine, triphenylarsine, or triphenylantimony (EPh₃) gave the monosubstituted complexes CpFe(CO)(EPh₃)SeC(O)SEt (E = P, As, Sb) in high...

article

Functionalized Silver‐Ion‐Mediated α‐dC/β‐dC Hybrid Base Pairs with Exceptional Stability: α‐d‐5‐Iodo‐2′‐Deoxycytidine and Its Octadiynyl Derivative in Metal DNA

Sebastian Lars Müller, Xinglong Zhou, Peter Leonard, Oxana Korzhenko, more

Chemistry – A European Journal > 25 > 12 > 3077 - 3090

Silver‐mediated α‐dC–Ag⁺–β‐dC hybrid base pairs decorated with 5‐iodo‐ or 5‐octadiynyl residues are well accommodated in duplex DNA. A strong T_m increase and favorable thermodynamic data for duplex DNA were observed after addition of silver ions. The phenomenon is particularly obvious when both nucleobases of the base pairs are functionalized. Neither the position of the base pair, nor the type of...

article

Synthesis, X-ray structure, and DFT modeling of a new polymeric zinc(II) complex of 2-mercaptonicotinic acid (MntH), {[Zn(Mnt–Mnt)(en)]·H₂O}_n

Muhammad Akhtar, Ivelina Georgieva, Tsvetan Zahariev, Natasha Trendafilova, more

Monatshefte für Chemie - Chemical Monthly > 2019 > 150 > 2 > 219-231

Two zinc(II) complexes of 2-mercaptonicotinic acid (MntH), {[Zn(Mnt–Mnt)(en)]·H₂O}_n and [Zn(Mnt–Mnt)(H₂O)], were prepared by the reaction of ZnCl₂ and MntH in the presence of ethylenediamine (en). They were characterized by elemental analysis, and IR, ¹H, ¹³C NMR and UV–Vis spectroscopic studies. In the presence of en, the sulfur atoms of the MntH ligands were connected and formed a disulfide linkage...

article

Phenoxazinone synthase and antimicrobial activity by a bis(1,3-diamino-2-propanolate) cobalt(III) complex

Biswajit Chowdhury, Biplab Bhowmik, Amrita Sahu, Mayank Joshi, more

Journal of Chemical Sciences > 2018 > 130 > 12 > 1-12

In this work, we have synthesised and structurally characterized a mononuclear cobalt(III) complex, $$[\hbox {Co(2-O-pn)}_{2}]\hbox {Cl}^{.} \hbox {2H}_{2} \hbox {O}$$ [Co(2-O-pn)2]Cl.2H2O (1), (2-O-pn = 1,3-diamino-2-propanolate). From the X-ray structure of the cobalt complex, it is revealed that Co(III) ion in 1 adopts an octahedral geometry and crystallizes in the monoclinic system with C2 / ...

article

Syntheses, characterization, crystalline architectures and luminescence of two halidomercury(II) compounds containing a bidentate (N,O) chelator: variation in nuclearities and superstructures by varying halides

Dipu Sutradhar, Habibar Chowdhury, Nimai Chandra Saha, Barindra Kumar Ghosh

Journal of Chemical Sciences > 2018 > 130 > 11 > 1-9

A neutral coordination polymer of chloridomercury(II) of the type $$[\hbox {Hg(bzpy)}({\upmu }-\hbox {Cl})\hbox {Cl}]_{\mathrm{n}}$$ [Hg(bzpy)(μ-Cl)Cl]n (1) and a dinuclear complex of bromidomercury(II) of the type $$[\hbox {Hg(bzpy)}({\upmu }-\hbox {Br})\hbox {Br}]_{2}$$ [Hg(bzpy)(μ-Br)Br]2 (2) (bzpy = 2-benzoylpyridine) were synthesized using a 1:1 molar ratio of $$\hbox {HgCl}_{2}/\hbox {HgBr}_{2}$$...

article

N-Valine-2-(3,5-dimethy-1,1-dioxido-2H-1,2,6-thiadiazin-4-yl)Benzamide: Synthesis, X-ray Structure and Hirshfeld Surface Analysis

Marivel Samipillai, Nilay Bhatt, Pralav Bhatt, Thavendran Govender, more

Journal of Chemical Crystallography > 2019 > 49 > 2 > 65-71

Here we report the synthesis and crystal structure of the title compound N-valine-2-(3,5-dimethy-1,1-dioxido-2H-1,2,6-thiadiazin-4-yl)benzamide, C₁₈H₂₃N₃O₅S. The structure was determined by the single crystal X-ray diffraction method. The compound crystallized in a monoclinic Sohncke space C2 space group with cell values of a = 18.3096 (11) Å, b = 7.4858 (5) Å, c = 14.1452 (10) Å, β = 90.176 (2)°...

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Search results

Fullerene recognition by 5-nitro-11,17,23,29-tetramethylcalix[5]arene

Catalytic features and crystal structure of a tau class glutathione transferase from Glycine max specifically upregulated in response to soybean mosaic virus infections

First synthesis and characterization of SRR/RSS-Ezetimibe

Crystallographic and magnetic studies of the 2-pyridone/copper halide system

1,8‐Diarylnaphthalenes: Synthesis, Properties, and Applications

Na₇RbTl₄ – A New Ternary Zintl Phase Containing [Tl₄]⁸⁻ Tetrahedra

Cover Feature: Monomeric Magnesium Catalyzed Alkene and Alkyne Hydroboration (Chem. Eur. J. 56/2022)

Monomeric Magnesium Catalyzed Alkene and Alkyne Hydroboration

Single Crystal X‐Ray Structure Analyses of Binary and Ternary Compounds A₄₉Tl_108+x (A=K, Rb, Cs; x=0–1.76) Related to the K₄₉Tl₁₀₈ Type Structure

Hexanuclear Niobium Cluster Iodides with Pyridine Ligands – Temperature Induced Auto‐Oxidation

Syntheses, Structures and Cytotoxicity of Cu(II) Complexes with α‐Amino acid derived Benzamidines

A Molecular Analogue of the C−H Activation Intermediate of the Silica‐Supported Ga(III) Single‐Site Propane Dehydrogenation Catalyst: Structure and XANES Signature

Zinc Substitution of Cobalt in Vitamin B₁₂: Zincobyric acid and Zincobalamin as Luminescent Structural B₁₂‐Mimics

Synthesis, structure and solid-state electrical conductivity of bis(1,2-diphenylethylene-1,2-dithiolate)nickel(II)

Towards the synthesis of piano-stool iron complexes mediated by S-alkyl selenothiocarbonato ligands and their substitution reactions

Functionalized Silver‐Ion‐Mediated α‐dC/β‐dC Hybrid Base Pairs with Exceptional Stability: α‐d‐5‐Iodo‐2′‐Deoxycytidine and Its Octadiynyl Derivative in Metal DNA

Synthesis, X-ray structure, and DFT modeling of a new polymeric zinc(II) complex of 2-mercaptonicotinic acid (MntH), {[Zn(Mnt–Mnt)(en)]·H₂O}_n

Phenoxazinone synthase and antimicrobial activity by a bis(1,3-diamino-2-propanolate) cobalt(III) complex

Syntheses, characterization, crystalline architectures and luminescence of two halidomercury(II) compounds containing a bidentate (N,O) chelator: variation in nuclearities and superstructures by varying halides

N-Valine-2-(3,5-dimethy-1,1-dioxido-2H-1,2,6-thiadiazin-4-yl)Benzamide: Synthesis, X-ray Structure and Hirshfeld Surface Analysis

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