bluuebunny/crossref_metadata_2025_split huggingface dataset:
Synthesis and Characterization of Metal Carbonyls [M(CO)6(M =Cr, Mo, W), Re(CO)5Br, Mn(CO)3Cp] with 2-Hydroxy-1-napthaldehyde Ethanesulfonylhydrazone (nafesh)
Authors: Senturk Ozan Sanli , Serta Sema , Özdemirc Ümmuhan 
Published: August 2018

Abstract
Five new complexes, M(CO)5(nafesh) (M = Cr (1), Mo (2), W (3)), Re(CO)4Br(nafesh) (4) and Mn(CO)3(nafesh) (5) have been synthesized by the photochemical reaction of metal carbonyls M(CO)6 (M = Cr, Mo, W), Re(CO)5Br, and Mn(CO)3Cp with 2-hydroxy-1-napthaldehyde ethanesulfonylhydrazone (nafesh). The complexes have been characterized by elemental analysis, EI mass spectrometry, FT-IR, 1H NMR spectroscopy. The spectroscopic studies show that nafesh behaves as a monodentate ligand coordinating via imine N donor atom in M(CO)5(nafesh) (M = Cr, Mo, W) and Re(CO)4Br(nafesh) and as tridentate ligand in Mn(CO)3(nafesh).
A New Eudesmane Derivative from Leontodon tuberosus
Authors: Spitaler Renate , Ellmerer Ernst-P. , Zidorn Christian , Stuppner Hermann 
Published: August 2018

Abstract
Besides the known compounds 2,4,6-trihydroxyacetophenone 4-O-β -D-glucopyranoside and syringaresinol 4’-O-β -D-glucopyranoside, the novel sesquiterpenoid 1,2-dehydro-3-oxocostic acid β - D-glucopyranoside ester was isolated from Leontodon tuberosus L. and its structure established by mass spectrometry and 1D- and 2D-NMR spectroscopy. Additionally, a number of fatty and phenolic acids was identified in the crude methanolic extract by HPLC-DAD and HPLC-MS. The chemosystematic impact of the new sesquiterpenoid is discussed briefly.
Enantioselective Synthesis of Epi-Emetine Analogues: Control of the Facial Selectivity in a Three-Component Domino Knoevenagel-Hetero-Diels-Alder Reaction*
Authors: Tietze Lutz F. , Rackelmann Nils 
Published: August 2018

Abstract
The domino Knoevenagel-hetero-Diels-Alder reaction of the aldehyde rac-8, Meldrum’s acid 2 and enol ether 3 leads to the cycloadduct rac-17 as the main product which in a second domino process was transformed into the benzoisoquinolizidine rac-18 by solvolysis, hydrogenolysis, condensation and hydrogenation; rac-18 was used as a substrate for the synthesis of the two diastereomeric epiemetine analogues 9 and 10 with > 96% ee (9) and 80% ee (10), respectively, by condensation with the phenylethylamine 23, Bischler-Napieralski reaction and “enantioselective” hydrogenation using the chiral catalyst (R,R)-26.
Dinuclear Ruthenium(I)Triazenide Complexes as Catalysts for Carbenoid Cyclopropanation Reactions
Authors: Leger Claus-Dieter , Maas Gerhard 
Published: August 2018

Abstract
The ability of ruthenium(I) triazenide complexes [Ru(CO)3(ArNNNAr)]2 (Ar = C6H4-4-X, X = CH3, Cl, Br) to catalyze the cyclopropanation of alkenes with methyl diazoacetate is investigated. With terminal alkenes (styrene, ethyl vinyl ether, 1-hexene), the cyclopropanecarboxylic esters are formed in good to high yield and with an E : Z diastereoisomer ratio of about 1.0 in most cases. 2-Methyl-2-butene is cyclopropanated in low yield but with a syn-selectivity up to 90:10.
Carbazolylsilane: Synthese und Kristallstrukturen / Carbazolylsilanes: Synthesis and Crystal Structures
Authors: Liebau Verena , Noltemeyer Mathias , Magull Jörg , Klingebiel Uwe 
Published: August 2018

Carbazole reacts with n-BuLi and fluorosilanes to give the lithium carbazolide (1) which crystallizes as a dimer from THF. In the reactions of 1 and difluorosilanes, F2SiR2, the carbazolylsilanes C12H8N-SiFR2 (2 - 4 R = Me (2), i Pr (3), t-Bu (4)), are obtained. Bis(carbazolyl)silanes, (C12H8N)2SiFR, are formed in the reaction of 1 with trifluorosilanes, F3SiR, in a molar ratio of 2:1, R = t-Bu (5), Ph (6), Me (7). Using F3SiMe and 1 in a molar ratio of 1:3 the tris(carbazolyl)silane (C12H8N)3SiMe (8) is isolated. The carbazolylfluorosilane 3 reacts with n-BuLi to give 1 and n-butyldiisopropylfluorosilane, or with lithium pyrrolide to give carbazolyl(-diisopropyl)pyrrolylsilane (9). Lithiumpyrrolide cleaves the Si-NC12H8-bond of 9 and forms the diisopropyl-bis(pyrrolyl)silane 10.
The crystal structures of 5, 6 and 7 have been determined and are discussed.
A New Ternary Arsenide LaNi5As3: Preparation and Crystal Structure
Authors: Babizhetskyy Volodymyr , Guérin Roland , Simon Arndt 
Published: August 2018

Abstract
The title compound was prepared from the elements by arc-melting followed by annealing in silica tubes at 1070 K for 3 months. The orthorhombic structure of LaNi5As3 was solved and refined from X-ray single crystal data: space group Pnma, a = 11.179(2), b = 3.9133(5), c = 24.443(3) Å , Z = 8, R = 0.040, Rw = 0.039 for 1045 unique reflections with I > 2σ (I) and 110 parameters. It is a new structure type, which can be described by condensed units of trigonal prisms around the arsenic atoms linked together to infinite zigzag chains. The structural features of LaNi5As3 are discussed in comparison with some representatives of a large family of structures with a metal/non-metal ratio equal or close to 2:1.
1,2-Deoxygenation of vic-Dihydroxyindenoimidazoles: Optimization of a Novel Deoxygenation Reagent
Authors: Hemmerling Hans-Jörg , Merschenz-Quack Angelika , Wunderlich Hartmut 
Published: August 2018

Abstract
Treatment of vic-dihydroxyindeno[1,2-d]imidazoles with N,N,N’,N’-tetraalkyl sulfurous diamides yields indeno[1,2-d]imidazoles by deoxygenation. Isochromeno[3,4-d]imidazoles are formed as byproducts. An X-ray crystal structure analysis confirmed the structure of deoxygenated products. The ratio of products depending on the reaction conditions was analyzed. A mechanism of the reaction is discussed.
Macrocyclic Gold(I) Complexes with Bridging Diacetylide and Diphosphine Ligands
Authors: Hunks William J. , Jennings Michael C. , Puddephatt Richard J. 
Published: August 2018

Abstract
The new dialkynyldigold(I) complexes [Ar(OCH2C≡CAu)2]n {Ar = 1,4-C6H4(CMe2-4-C6H4)2, 4,4’-C6H4C6H4 and 1,5-C10H6} react with diphosphines LL = Ph2P(CH2)nPPh2 (n = 1 to 6) and trans-Ph2PCH=CHPPh2 to give luminescent macrocyclic digold(I) or tetragold(I) complexes with bridging diphosphine and diacetylide ligands. The digold(I) complex [1,4-C6H4(CMe2-4- C6H4OCH2C≡CAu)2(μ-LL)], with LL = trans-Ph2PCH=CHPPh2, forms a 28-membered ring, and the rings associate through aurophilic bonding in the solid state. In contrast, the tetragold(I) complex [4,4’-C6H4C6H4(OCH2C≡CAu)2(μ-LL)], with LL = Ph2PCH2PPh2, forms a more rigid 42-membered ring.
Ordnung und Fehlordnung der Anionen in tetragonalen Boridcarbiden der Seltenerdmetalle / Order and Disorder of Anions in Tetragonal Boride Carbides of Rare Earth Metals
Authors: Oeckler Oliver , Mattausch Hansjürgen , Bauer Josef , Simon Arndt 
Published: August 2018

Abstract
Compounds that feature the metal atom substructure of “La5B2C6” are known for most rare earth metals (Ln). They are characterized by two types of voids surrounded by large bicapped tetragonal antiprisms and smaller distorted octahedra, respectively. For many rare earth elements, a huge variation of lattice parameters has been observed for the corresponding compounds. A series of structure determinations has beed performed in order to elucidate the reasons for this remarkable stability range. The compounds of the earlier lanthanoids (La-Nd) exhibit broad ranges of homogeneity that are due to varying occupancy of octahedral voids which can be empty or filled by varying amounts of C atoms or C2 groups. However, the larger voids are fully occupied with disordered C3B groups. In most cases the disorder is completely statistical with only a few exceptions. In contrast, two different phases have been observed in the case of late rare earth metals (starting from Gd). Their ranges of homogeneity are moderate, and the larger voids are fully occupied by ordered CBC entities. The difference between these two types of phases concerns the octahedral voids which contain C atoms in the case of compounds with the idealized composition Ln5B2C5 and C2 groups for Ln5B2C6, respectively. Positional disorder is possible for both C atoms and C2 groups. Therefore, no single well-defined compound is known that possesses the metal atom arrangement of “La5B2C6”.
Binuclear Ten-Membered Ring Cyclometallated Complexes of Digold(I) and their Reactions with Iodine and Bromine
Authors: Bennett Martin A. , Bhargava Suresh K. , Hockless David C. R. , Mohr Fabian , Watts Kellie , Welling Lee L. , Willis Anthony C. 
Published: August 2018

Abstract
The cyclometallated digold(I) complexes [Au2(μ-2-C6H4CH2PPh2)2] (10) and [Au2(μ-2-CH2C6H4PPh2)2] (11) have been synthesized by the reaction of Li[2-C6H4CH2PPh2] and Li[2-CH2C6H4PPh2], respectively, with [AuBr(PEt3)]. A single crystal X-ray structure analysis of 10 shows the linearly coordinated gold(I) atoms to be separated by 3.0035(9) Å in a puckered ten-membered ring. Both complexes add one mol equivalent of iodine to form initially gold(I)-gold(III) complexes [Au(μ-2-C6H4CH2PPh2)2AuI2] (14a) and [Au(μ-2-CH2C6H4PPh2)2AuI2] (17), which isomerize to the corresponding salts [Au(κ2-P,C-C6H4CH2PPh2)2][AuI2] (13a) and [Au(κ2-P,C-CH2C6H4PPh2)2][AuI2] (16). In 13a the gold(III) cation is planar coordinated by a pair of chelate P-C donor ligands, the phosphorus and carbon atoms being, separately, mutually cis, as shown by X-ray structural analysis. From the reaction of 10 with 2 mol equivalents of bromine, the neutral chelate complex [AuBr2(κ2-P,C-C6H4CH2PPh2)] (15) has been isolated and structurally characterized.
Bis-, Tris- and Tetrakis(lithiomethyl)germanes: New Building Blocks for Organogermanium Compounds
Authors: Strohmann Carsten , Wack Eric 
Published: August 2018

Abstract
Bis(lithiomethyl)germanes, R2Ge(CH2Li)2, tris(lithiomethyl)germanes, RGe(CH2Li)3, and tetrakis( lithiomethyl)germane, Ge(CH2Li)4, were prepared by the reductive C-S bond cleavage with lithium naphthalenide (LiC10H8) or lithium p,p’-di-tert-butylbiphenylide (LiDBB) and characterized by trapping with Bu3SnCl. The bis(lithiomethyl)germanes were used for the synthesis of 1,1-dimethyl-3,3-diphenyl-1-germa-3-silacyclobutane, 1,1-diethyl-3,3-diphenyl-1-germa-3-silacyclobutane, 1,1,3,3-tetraphenyl-1-germa-3-silacyclobutane and 1,1,3,3-tetraphenyl-1,3-digermacyclobutane. The single-crystal X-ray diffraction studies of methyltris(phenylthiomethyl)germane and tetrakis(phenylthiomethyl)germane, starting materials for the corresponding poly(lithiomethyl) germanes, indicate tetrahedrally arranged substituents at the germanium atoms.
Gold-Thiolate Clusters: A Relativistic Density Functional Study of the Model Species Au13(SR)n, R = H, CH3, n = 4, 6, 8
Authors: Genest Alexander , Krüger Sven , Gordienko Alexei B. , Rösch Notker 
Published: August 2018

Abstract
The binding of sulfanyl and alkylsulfanyl model ligands to gold clusters was studied for the case of Au13(SR)n with R = H, CH3 and n = 4, 6, 8. Accurate all-electron electronic structure calculations and geometry optimizations of these gold-thiolate clusters have been performed with a scalar relativistic Kohn-Sham procedure as implemented in the density functional program PARAGAUSS. In all structures obtained, bridge coordination was preferred for both types of ligands; no higher coordinated sites where occupied. While in many cases ligand decoration did not change the overall structure of the Au13 core, also more open structures with Au-Au distances elongated beyond the bulk value have been obtained. The effects due to increasing ligand decoration were small: a small decrease of the binding energy per ligand does not exclude higher ligand coverages. The differences between the model ligands SH and SCH3 were consistent in all cases considered: SCH3 exhibits weaker binding and a slightly smaller charge separation between cluster core and ligand shell, which amounts up to about 1.5 e for 8 ligands. Overall, the Au13 core of the clusters was found to be quite flexible. This can be rationalized by the fact that the calculated binding energy per ligand is comparable or even exceeds the binding energy per atom in Au13.
Mono- and Binuclear Gold(I) Amido Compounds of Purine Derivatives
Authors: Horvath Ulrike E. I. , Cronje Stephanie , McKenzie Jean M. , Barbour Leonard J. , Raubenheimer Helgard G. 
Published: August 2018

Abstract
A series of neutral dinuclear and mononuclear gold(I) complexes with phosphine and N-bonded 9H-purin-9-ate or 9H-purin-6-ylamine-9-ate have been synthesised under basic conditions and characterised by gHSQC, 1H,13C gHMQC and 1H detected 1H,15N gHMQC experiments in addition to ESI-MS and IR spectroscopy. Intermolecular aurophilic interactions are present in the structures of polymeric 1,2-bis(diphenylphosphine)ethane(9H-purin-9-ate)gold(I) 1, (3.1641(4) Å ) and 1,3- bis(diphenylphosphine)propane(9H-purin-9-ate)gold(I) 3, (3.52Å ). The N-Au-P angle in 1 is exceptionally small (166.3(1)°). Intramolecular aurophilic interaction (3.63 Å ) complemented by hydrogen bonding dictates the non-oligomeric structure of 1,3-bis(diphenylphosphine)propane(9H-purin- 6-ylamin-9-ate)gold(I) (7). Dimeric aurophilic interactions appear in the structure of (tributylphosphine)( 9H-purin-9-ate)gold(I) (11) (3.2311(7) Å ), while the structure in the other mononuclear compound, (triphenylphosphine)(9H-purin-9-ate)gold(I) (9) is organised by Au. . .N-interactions.
Surprising Insights in the Various Molecular Structures of Hypercoordinate Bis(oxinato)silicon Complexes
Authors: Wagler Jörg , Schley Michael , Gerlach Daniela , Böhme Uwe , Brendler Erica , Roewer Gerhard 
Published: August 2018

The syntheses of two cyclic diorganosilicon enamines

=CH2) [R = Ph (2a), Me (2b)] are described. These compounds react with 8-oxyquinoline leading to bis(oxinato)silicon complexes RPhSi(oxinate)2 [R = Ph (5a), Me (5b)]. Their X-ray structures reveal hexacoordination of the Si atom with the monodentate substituents in cis-positions and N atoms as well as O atoms in trans-positions.
In crystalline dimethylbis(oxinato)silicon, Me2Si(oxinate)2 (7), the silicon atom is only bicapped tetrahedrally coordinated, while for dichlorobis(oxinato)silicon, Cl2Si(oxinate)2 (8), there is an octahedral coordination of the Si atom with chlorine atoms in trans-positions. This conclusion is based on the results of spectroscopic analysis (IR, 29Si CP/MAS NMR) as well as quantum chemical calculations. The first example of a silicon-bis-oxinate with the N→Si dative bonds in a trans-arrangement has been detected in the hexacoordinate silicon tris-chelate (oxinate)2Si(PhN-CH2CH2-NPh) (11). Its configuration was proven by X-ray structure analysis. Thus, for hexacoordinate bis(oxinato)silicon compounds three new architectures were found which complement the previously established building pattern of the N,N’-cis-O,O’-trans-bis(oxinato)silicon complexes.
The mer-tris(oxinato)siliconium cation (9+) (its configuration being proven by 1H and 13C NMR spectroscopy) features at least three coordination patterns with (O,O;N,N)-cis,cis-, -cis,trans- as well as -trans,cis-arrangements of two oxinate ligands.
Photocatalytically Active Materials with Pyridinium-enolate Partial Structures
Authors: Schmidt Andreas , Albrecht Marcel 
Published: August 2018

Abstract
2,3-Dichloro-1,4-naphthoquinone and tetrabromo- or tetrachloro-1,4-benzoquinone were converted into pyridinium enolate betaines by reaction with pyridine or 4,4′-bipyridine. The reaction conditions were applied to poly-(4-vinylpyridine) and a modified Merrifield resin to obtain functionalized polymeric materials. These were examined in thermogravimetric analyses. Reversible photocatalytic electron transfer reactions in the presence of proflavinium and EDTA as sensitizer and sacrificial donor, respectively, were examined. All monomeric and polymeric materials, except for one, proved to be active.
Crystal Structure, NQR and DSC Studies of Tetrabromocadmates(II): [4-H2NC5H4NH]2CdBr4 · H2O and [2,3,5,6-(CH3)4C4N2H2]CdBr4
Authors: Hatano Naoko , Nakashima Michio , Horiuchi Keizo , Terao Hiromitsu , Ishihara Hideta 
Published: August 2018

Abstract
4-Aminopyridinium tetrabromocadmate(II) monohydrate (1) crystallizes in the orthorhombic space group Pbcm with a = 6.876(2), b = 14.089(2), and c = 18.845(2) Å , Z = 4, T = 296 K. In the crystal structure, a [CdBr4]2− anion, a 4-aminopyridinium cation, and a water molecule are alternately connected into chains by hydrogen bonds N-H···Br and O-H···Br. 2,3,5,6- Tetramethylpyrazinium tetrabromocadmate(II) (2) crystallizes in the orthorhombic space group P212121 with a = 14.640(12), b = 15.615(7), c = 6.686(5) Å , Z = 4, T = 296 K. In the crystal structure, a [CdBr4]2− anion and a 2,3,5,6-tetramethylpyrazinium cation are interconnected by bifurcated hydrogen bonds N-H· · ·2Br and form infinite chains. 81Br NQR spectra with three lines with an intensity ratio of 1 : 1 : 2 (77 K ≤ T ≤ ca. 325 K) and four lines with an intensity ratio of 1 : 1 : 1 : 1 (77 K ≤ T ≤ ca. 330 K) were observed for crystalline 1 and 2, respectively, which are consistent with the crystal structure data. DSC measurements showed the existence of thermal anomalies at high temperatures in both 1 and 2.
Comparison of Alkoxy-substituted 4,4´-Distyrylbiphenyls and the Corresponding 4,4´-Distyrylbenzenes
Authors: Meier Herbert , Lifka Thorsten , Oehlhof Annette 
Published: August 2018

Abstract
Configurationally highly pure (E,E)-4,4´-bis(styryl)biphenyls 2a - e were obtained by Siegrist reactions of 4,4´-dimethylbiphenyl 3 and alkoxy-substituted benzaldimines (4a - e). DSC measurements have indicated different crystalline modifications of these conjugated compounds. The stilbenoid chromophores of 2a - e are compared to the stilbenoid chromophores in the OPV series, which have a similar length of conjugation. The intense fluorescence and the high transparency in the visible region are promising properties for an application of the donor-substituted compounds 2a - e in twophoton absorption (TPA) techniques.
Synthesis of Dimethylphosphinyl-substituted α-Amino(aryl)methylphosphonic Acids and Their Esters
Authors: Zagraniarsky Yulian , Ivanova Bojidarka , Nikolov Karamfil , Varbanov Sabi , Cholakova Tsvetanka 
Published: August 2018

Abstract
Dimethylphosphinylmethylamine (1) and its aldimines 2 were used for the preparation of dimethyl and diethyl α-amino(aryl)methylphosphonates 3a - l via imine hydrophosphonylation and Kabachnik-Fields reaction. Their acid hydrolysis gave rise to the corresponding α-aminophosphonic acids 4a - e. Compounds 3 and 4 have two different phosphorus-containing groups - phosphonyl and dimethylphosphinyl - and might have interesting biological activity.
Reduction of a Heterocyclic Selenium(IV) Oxide LSeO by [Pd(COD)Cl2] – Crystal Structure of trans-[Pd(LSe)2Cl2]
Authors: Lozan Vasile , Kersting Berthold 
Published: August 2018

Abstract
The heterocyclic selenium(IV) oxide LSeO is reduced by [Pd(COD)Cl2] in MeCN solution to produce trans- [Pd(LSe)2Cl2] (2) (LSe = 2,3-dihydro-2-isopropyl-7-(Nisopropylcarbamoyl)- 1,2-benzisoselenazole-3-oxide). Complex 2 crystallizes in the triclinic space group P1̅ with a = 10.700(1), b = 10.871(1), c = 15.656(2) Å , α = 104.51(1), β = 94.59(1), γ = 95.25(1)◦, V = 1745.5(3) Å3, and Z = 2. The COD is oxidized to 5,6-epoxycyclooctene.
New triazolothiadiazole and triazolothiadiazine derivatives as kinesin Eg5 and HIV inhibitors: synthesis, QSAR and modeling studies
Authors: Khan Imtiaz , Hameed Shahid , Al-Masoudi Najim A. , Abdul-Reda Nabeel A. , Simpson Jim 
Published: August 2018

Abstract
A new series of fused 1,2,4-triazoles, namely 6-aryl-3-(furan-2-yl)-[1,2,4]triazolo[3,4-b][1,3,4]thiadiazoles 3a–h and 4a–f as well as 6-aryl-3-(furan-2-yl)-7H-[1,2,4]triazolo[3,4-b][1,3,4]thiadiazines 5a–h, were synthesized by the condensation of 4-amino-5-(furan-2-yl)-4H-1,2,4-triazole-3-thiol (2) with substituted aromatic acids and phenacyl bromides, respectively. The structures of the newly synthesized compounds were established using spectroscopic analysis, while that of 3e was confirmed independently by a single-crystal X-ray structure determination. The compounds were evaluated for their antiviral activity against the replication of HIV-1 and HIV-2 in MT-4 cells using an MTT assay. In a docking study, 4b interacted with several amino acids in the reverse transcriptase (RT) binding site of HIV-1. Some new analogues were selected for evaluation of their Eg5 inhibitory activity using an in vitro malachite green ATPase assay. The QSAR of these new analogues was studied as well.
Synthesis of ferrocenyl aryl ethers via Cu(I)/phosphine catalyst systems
Authors: Frey Guido D. , Hoffmann Stephan D. 
Published: August 2018

Abstract
Ferrocenyl aryl ethers can be synthesized in good yields by Cu(I)/phosphine-catalyzed coupling reactions from iodoferrocene or 1,1′-dibromoferrocene and various phenols in toluene, using Cs2CO3 or K3PO4 as a base. For the first time a solid-state structure of a ferrocenyl-1,1′-diaryl ether [1,1′-di(4-tert-butylphenoxy)ferrocene] has been determined from single-crystal X-ray data. The mixed ferrocenyl aryl ether 1-(4-tert-butylphenoxy)-1′-(2,4-dimethylphenoxy)ferrocene was prepared in a two-step synthetic protocol.
Surface Properties of Plastocyanin at an Air-water Interface
Authors: Brody S. S. 
Published: August 2018

Abstract
The area/molecule, A, and surface potential, ⊿V , of plastocyanin (pcyan) at an air-water inter­ face varies with pH. At a pH of about 8.6 a maximum value is obtained for A and ⊿V. At a surface pressure of 3 dyn/cm A and ⊿V are 375 Å2 and 325 mV, respectively. The dipole moment is 2050 milliDebyes.
Pcyan and chlorophyll α (chl) form a mixed film (free energy of mixing and interaction is negative). At a concentration of [pcyan] / [chl] ≈ 1 a maximum interaction is observed both for ⊿V and A (at pH 7.8). Irradiation of the mixed film, in a nitrogen atmosphere, results in an increase in A and ⊿V.
β-Indolylessigsäure-(IES)-abhängiger K+-H +-Austauschmechanismus und Streckungswachstum bei Avena-Koleoptilen / A β-Indole Acetic Acid (IAA) Dependent K+-H+-Exchange Mechanism as Related to Growth of Avena Coleoptiles
Authors: Haschke H.-P. , Lüttge U. 
Published: August 2018

Abstract
β-Indole acetic acid (IAA) (10-7 - 10-5
M) enhanced elongation of Avena coleoptiles is shown to be correlated with increased K+ net influx and H+ net efflux. The data suggest a 1:1 exchange of K+ and H+. It is suggested that an IAA controlled K+-H+-exchange pump is involved in IAA regula­tion of elongation.
Notizen: Pilzpigmente, XXII Grevillin D, der Hauptfarbstoff von Suillus granulatus, S.luteus und S.placidus (Boletales)/ Pigments of Fungi, XXII Grevillin D, the Main Pigment of Suillus granulatus, S. luteus and S. placidus (Boletales)
Authors: Besl Helmut , Michler Ilona , Preuß Regina , Steglich Wolfgang 
Published: August 2018

Abstract
The new pyrone derivative grevillin D (3) has been iso­lated from several Suillus species. Its structure has been established by spectral data, taking advantage of large pyri­dine solvent shifts in the 1H-N M R spectrum . 3 may be derived biogenetically from grevillin B (1) via an oxidative rearrangement.
Infrared and Raman Spectroscopic Study of Isocytosine
Authors: Delabar Jean-Maurice 
Published: August 2018

Abstract
Isocytosine and isocytosine-d3 crystals have been investigated at 300 K, 90 K, and 10 K by infrared spectroscopy; the Raman spectra of crystals and solutions in H2O , D2O have also been studied. Using these data and the frequency group approximation we propose assignments of the fundamental molecular frequencies. Eleven lattice vibration frequencies have been observed in absorption and nine in diffusion.
Isolierung und Identifizierung der Flavon(ol)glykoside der Endivien (Cichorium endivia L.) und des Kopfsalates (Lactuca sativa L.) / Isolation and Identification of the Flavon(ol) glycosides of the Endive (Cichorium endivia L.) and the Lettuce (Lactuca sativa L .)
Authors: Wöldecke M. , Herrmann K . 
Published: August 2018

Abstract
For the first time, quercetin-3-β-ᴅ-glucuronide, quercetin-3-β-ᴅ-glucoside, quercetin-3-(O-malonyl) -β-ᴅ-glucoside and luteolin-7-/9-ᴅ-glucuronide were isolated from lettuce and kaempferol-3-β-D-glucuronide and kaempferol-3-β-ᴅ-glucoside from endives as crystals. The flavonol glucuronides are the main glycosides. Moreover a glycoside was found in endives which is very probably identical with kaempferol-3-(O-malonyl) -β-ᴅ-glucoside.