bluuebunny/crossref_metadata_2025 huggingface dataset:
Untersuchungen zum quasibinären System Bi2Te3/BiBr3 / Investigations on the Pseudobinary System Bi2Te3/BiBr3
Authors: Petasch U. , Oppermann H.
Published: February 2015

The phase diagram of the pseudobinary sytem Bi2Te3/BiBr3 was investigated by DTA, total pressure measurements and X-ray phase analysis. Only BiTeBr exists as a ternary phase in this system. The compound melts congruently at 526 °C. The heat of formation and standard entropy were calculated from vapor pressure data:

ΔH(BiTeBr, f, 298) = (-30,4 ± 1,4) kcal/mol; S°(BiTeBr, f, 298) = (36,2 ± 2,9) cal/K·mol.
A Polyhydroxylated Cyclopentene: A Useful Synthon toward the Synthesis of Carbocyclic D-Fructofuranoid
Authors: Seepersaud Mohindra , Bucala Richard , Al-Abed Yousef
Published: February 2015

A polyhydroxylated cyclopentene has been synthesized in five steps with an overall yield of 61% , starting from 2,3,5-tri-O-benzyl-D-arabinofuranose.
Die Oxochlorovanadate PPh4[VOCl3OH], PPh4[VOCl4], (PPh4 )2 [VOCl4 ]·2CH3CN und (PPh4)2[VOCl4]·CH3CN mit auffälligen Abweichungen von der quadratisch-pyramidalen Anionenstruktur / The Oxochlorovanadates PPh4[VOCl3OH], PPh4[VOCl4], (PPh4 )2 [VOCl4 ]·2CH3CN and (PPh4)2[VOCl4]·CH3CN with Remarkable Deviations from the Square-Pyramidal Anion Structure
Authors: Noll Andrea , Rabe Susanne , Müller Ulrich
Published: February 2015

Starting from vanadium which was not free of oxide, VCl4 was prepared; its reaction with PPh4Cl in the presence of K2S5 in dichloromethane yielded PPh4[VOCl3OH]. From V2S5, PPh4Cl and S2Cl2 in acetonitrile, sulfur crystallized first, then PPh4[VOCl4], and then (PPh4)2[VOCl4]·4CH3CN. Upon standing with the mother liquor at -18°C, the latter was converted to (PPh4)2[VOCl4]·2CH3CN. According to its X-ray crystal structure determination, PPh4[VOCl3OH] (space group Pbca, a = 1105.5, b = 1920.8, c = 2242.8 pm, Z - 8) has nearly square-pyramidal anions that are associated to chains by 0-H⋯C1 bridges. PPh4[VOCl4] is isotypic with AsPh4[VOCl4] and has strictly square-pyramidal anions (space group P4/n, a = 1254.0, c = 765.0 pm, Z = 2). In (PPh2)2[VOCl4]·4CH3CN (space group P1̄, a = 1281.3, b = 1276.6, c = 1841.5 pm, α = 84.11°, β= 83.96, γ = 64.31°, Z = 2) the square pyramid of the VOCl4
2- ion is distorted towards a trigonal-bipyramidal shape (C2v symmetry) having trans-ClVCl angles of 145.88° and 156.87° and O=V-Cl angles of 107° and 101.6°. In (PPh4)2[VOCl4]·2CH3CN (space group P1, a = 1017.1, b = 1029.3, c = 2416.0, α = 77.74°, ß = 79.99°, γ = 78.94°, Z = 2), the VOCl4
2- structure is even closer to trigonal-bipyramidal, with trans-ClVCl angles of 133.25° and 165.80° and 0=V-Cl angles of 113.3° and 97°.
Organogallitimamide: Synthese und Kristallstrukturen von [iPr2GaN(H)tBu]2 und [Mes(Cl)GaN(H)tBu]2 / Organogallium Amides: Synthesis and Crystal Structures of [iPr2GaN(H)tBu]2 und [Mes(Cl)GaN(H)tBu]2
Authors: Kopp Mike R. , Kräuter Thomas , Dashti-Mommertz Anahita , Neumüller Bernhard
Published: February 2015

[iPr2GaN(H)tBu]2 (1) and [Mes(Cl)GaN(H)tBu]2 (2) can be synthesized by the metathesis reaction of iPr2GaCl and MesGaCl2 with one equivalent of LiN(H)tBu, respectively. 1 and 2 were characterized by NMR, IR and MS techniques as well as by X-ray structure analyses. 1 and 2 consist of centrosymmetric dimeric molecules with a Ga2N2 skeleton. According to cryoscopic measurements in benzene, both amides are dimeric in solution, too.
5,10,15,20-Tetrakis(diphenylmethyl)porphyrin - A Nonplanar Porphyrin with Intermediate Degree of Ruffling
Authors: Runge Steffen , Senge Mathias O. , Ruhlandt-Senge Karin
Published: February 2015

The title compound was prepared by condensation of pyrrole and diphenylacetaldehyde in 16% yield. Based on spectroscopic data, the free base porphyrin exhibits a nonplanar macrocycle in solution with a degree of distortion between that of 5,10,15,20-tetracyclohexylporphyrin and 5,10,15,20-tetra(t-butyl)porphyrin. A crystal structure determination of the cobalt(II) complex reveals a ruffled macrocycle conformation with an average out-of-plane displacement of the meso carbon atoms by 0.55 Å.
Synthesis of 3-Amino(alkoxy)-2,4-dioxo-1,3-oxazolidine-5-carboxylates from Tartronic Esters
Authors: Kurz Thomas , Geffken Detlef
Published: February 2015

The reaction of tartronic esters (1a-d) with 1,1'-carbonyl-di-(1,2,4-triazole), hydrazines or hydroxylamines produces 3-amino/3-alkoxy(aralkoxy)-2,4-dioxo-1,3-oxazolidine-5-carboxylic esters (5,6) which are structurally related to the fungicides Famoxadone (I) and Chlozolinate (II). Under suitable conditions the carboxylic ester of 6 can be converted to a carboxamide (7), carbohydrazide (8) or carbohydroxamic acid (9).
New Stannides CaTSn2 (T = Rh, Pd, Ir) and Ca2Pt3Sn5 - Synthesis, Structure and Chemical Bonding
Authors: Hoffmann Rolf-Dieter , Kußmann Dirk , Rodewald Ute Ch. , Pöttgen Rainer , Rosenhahn Carsten , Mosel Bernd D.
Published: February 2015

New stannides CaTSn2 (T = Rh, Pd, Ir) and Ca2PhSn5 were prepared as single phase materials by a reaction o f the elements in glassy carbon crucibles under flowing purified argon. The four compounds were investigated by X-ray diffraction both on powders and single crystals and their structures were refined from single crystal data. The stannides CaTSn2 (T = Rh, Pd, Ir) adopt the MgCuAl, structure with space group Cmcm: a = 434.1(1), b = 1081.7(3), c = 748.8(2) pm, wR2 = 0.040Ö, 451 F2 values for CaRhSn2, a = 442.7(2), b = 1113.8(4), c = 745.6(2) pm, wR2 = 0.0318, 471 F ; values for CaPdSn2, and a = 429.5(1), b = 1079.5(3), c = 758.6(2) pm, wR2 = 0.0465, 455 F2 values for CaIrSn2 with 16 variables for each refinement. Chemical bonding analysis leads to the description o f a distorted filled CaSni substructure in which the tin-tin bonding is modified by the insertion o f transition metal atoms into the planar calcium layers, favoring strong tin-transition metal bonding. 119Sn Mössbauer spectra show single signals for CaTSn2 (T = Rh, Pd, Ir) which are subjected to quadrupole splitting. The electron count o f the CaTSn2 compounds correlates with the ll9Sn isomer shift. Ca2Pt3Sn3 crystallizes with the Yb2Pt3Sn5 type structure: Pnma, a = 734.8(1), b = 445.50(7), c = 2634.8(5) pm, wR2 = 0.0636, 1406 F2 values and 62 variables. The platinum and tin atoms in Ca2Pt3 Sns build a complex three-dimensional [Pt3Sn5] polyanion in which the calcium cations fill distorted pentagonal and hexagonal channels. According to semi-empirical band structure calculations the strongest bonding interactions are found for the Pt-Sn contacts, follow ed by Sn-Sn bonding. The 119Sn Mössbauer spectrum of Ca2Pt3Sn5 shows two superimposed signals at δ = 2.10(3) and δ= 2.18(6) mm/s
Untersuchungen zum chemischen Transport intermetallischer Phasen, I: GeTe, SnTe, PbTe / Investigations on the Chemical Transport of Intermetallic Phases, I: GeTe, SnTe, PbTe
Authors: Bosholm O. , Oppermann H.
Published: February 2015

GeTe, SnTe, and PbTe have been prepared by chemical transport reactions with iodine as transport agent in the temperature range between T2(800 - 700°C) and T1(700 - 500°C). The effective transport equilibria were determineted. Total pressure measurements in the system Ge- Te-I give the coexistence equlibria for condensed phases, and also for the gasphase equilibra. GeTe4 exists only as a metastable phase at lower temperatures and decom poses near 260°C in GeTe and Te.

Thermodynamic calculations show satisfactory agreement between calculation and experiment
Kristallstrukturen und Normalkoordinatenanalyse von trans-(n-Bu4N)2 [ReCl4IX], X = NCS, NCSe / Crystal Structures and Normal Coordinate Analyses of trans-(n-Bu4 N)2[ReCl4 IX], X = NCS, NCSe
Authors: Homolya L. , Strueß S. , Preetz W.
Published: February 2015

The crystal structures of trans-(n-Bu4N)2[ReCl4I(NCS)] (triclinic, space group P1, a = 11.268(3), b = 11.696(2), c = 18.109(3) A, a = 98.68(2) β = 106.40(2), γ= 97.58(2)°, Z = 2)and trans-(n-Bu4N)2 [ReCl4I(NCSe)] (orthorhombic, space group P212121 a = 11.839(2), b = 12.2679( 10), c = 31.136(5) A, Z = 4) have been determined by single crystal X-ray diffraction analysis. Based on the molecular parameters of the X-ray determinations the low temperature (10 K) IR and Raman spectra o f the (n-Bu4N) salts have been assigned by normal coordinate analysis. The valence force constants are fd(ReN) = 1.69(NCS) and 1.65(NCSe) mdyn/Å
Complexes of Group 12 Metals with 2-Acetylpyridine 4N-Dimethylthiosemicarbazone and with 2-Acetylpyridine-N-oxide 4N-Dimethylthiosemicarbazone: Synthesis, Structure and Antifungal Activity
Authors: Bermejo Elena , Carballo Rosa , Castiñeiras Alfonso , Domínguez Ricardo , Liberta Anthony E. , Maichle-Mössmer Cäcilia , West Douglas X.
Published: February 2015

Reaction in ethanol of group 12 metal halides with 2-acetylpyridine 4N-dimethylthiosemicarbazone (H4DML) and with 2-acetylpyridine-N-oxide 4N-dimethylthiosemicarbazone (H4DMLO) afforded complexes of the forms [M(H4DML)X2] (1 - 9) and [M(H4DMLO)X2] (10 - 18) (M = ZnII, CdII or HgII; X = Cl, Br or I). H4DMLO and the complexes of both thiosemicarbazones have been characterized by elemental analysis and by IR and 1H, 13C and 113Cd NMR spectroscopy, and the crystal structures of [Cd(H4 DML)Cl2 ] (4), [Cd(H4 DML)l2 ] (6), H4DMLO, [Hg(H4DMLO)Cl2] (16) and [Hg(H4 DMLO)Br2] (17) have been determined by X-ray diffractometry. In all the H4DML complexes, the thiosemicarbazone acts as an N,N,Stridentate ligand, and the coordination polyhedra of the pentacoordinate metals are more or less distorted tetragonal pyramids. H4DMLO is an 0,N,S-tridentate ligand for zinc and cadmium halides and an N,S-bidentate ligand for mercury halides, in which the mercury atom has coordination number four and a distorted trigonal pyramidal environment. In assays of antifungal activity against Aspergillus niger and Paecilomyces variotii, H4DML was more active than nystatin, and its complex with ZnCl2 also showed good activity against A. niger; neither H4DMLO nor any of its complexes inhibited the growth of either pathogen
Synthesis of Pyrimidine, Thiazolopyrimidine, Pyrimidotriazine and Triazolopyrimidine Derivatives and their Biological Evaluation
Authors: Attaby Fawzy A. , Eldin Sanaa M.
Published: February 2015

Pyrimidin-4-one-2-thione (3) was synthesized via the reaction of thiourea (1) with ethyl benzoylacetate (2) and was taken as a starting material for the present study via its reactions with the halogen-containing reagents 6a-d and lOa-c to give the corresponding thiazolopyrimidines 8, 9 and 12a-c. The 2-hydrazino derivatives 5 were synthesized either via the reaction of 3 or 4 with hydrazine hydrate. Compound 5 reacted with 6a-c and lOa-c to give the corresponding pyrimidotriazines 17a-c and 19 respectively. Also, compound 5 reacted with the active methylene-containing reagents 13 and 2a,b to give the corresponding 2-pyrazolopyrimidines 15 and 22a,b respectively. On the other hand, the triazolopyrimidines 21a,b and 30a,b were also obtained via the reaction of 5 with each of formic acid, acetic anhydride, ethyl chloroformate and carbon disulfide respectively. Some of the newly synthesized heterocyclic derivatives were tested for their biological activity
Two New Aromatic Constituents from Stocksia brahuica
Authors: Ahmad Viqar Uddin , Ali Zulfiqar , Ali Muhammad Shaiq , Iqbal Fazila , Zahid Muhammad , Tareen Rasool Bakhsh
Published: February 2015

The methanolic extract of Stocksia brahuica yielded two new aromatic constituents: diphenylacetic acid and brahene (2',4'-dihydroxy-7-methoxy-4,5-methylenedioxyisoflavene). Their structures were characterized with the help of modern spectroscopic techniques including 2D-NMR.
Metallkomplexe mit biologisch wichtigen Liganden, CXX [1]. Halbsandwich-Komplexe von Ruthenium(II) und Iridium(III) mit 3-(3-Pyridyl)-D-alaninat
Authors: Haas Katharina , Nöth Heinrich , Beck Wolfgang
Published: February 2015

The reactions of the chloro bridged complexes [(ρ-cymene)RuCl2]2 and [(C5Me5)IrCl2]2 with the anion of 3-(3-pyridyl)-D-alanine (L) afford the N,O-chelate complexes (p-cymene)- Ru(L)(Cl) (1) and (C5Me5)Ir(L)(Cl) (2). Abstraction of chloride from 1 and 2 using AgSbF6 gives the dimers [(ρ-cymene)Ru(μ-L)2Ru(ρ-cymene)]2+(SbF6)2 (3) and [(C5Me5)Ir(μ-L)2- Ir(C5Me5)]2+(SbF6)2 (4) with coordination of the pyridine N atom. Complex 4 is formed in high diastereomeric excess. The structure of (C5Me5)Ir(μ-L)2Ir(C5Me5)]Cl2 (5) which contains the SIrRCRC RIr diastereoisomer in the crystal was determined by X-ray diffraction.
Imidazole Nucleosides, V. Synthesis of 3′-Fluoro-3′-deoxy-ribofuranosides of 4(5)-Amino-imidazoIe-5(4)carboxamide
Authors: Guglielmi Hans , Dachtler Markus , Albert Klaus
Published: February 2015

The synthesis of the 3′-fluoro-derivatives of 5-amino-1-(β-D-ribofuranosyl)imidazole-4- carboxamide (AICA-riboside) and the isomeric 4-amino-1(β-D-ribofuranosyl)imidazole-5- carboxamide (iso-AICA-riboside) are described. Structures were confirmed by elemental analysis, UV and 1H NMR spectroscopy. The anti-viral and anti-cancer activities of these imidazole nucleosides were tested.
Synthese, Spektren und Kristallstruktur von cis-Monobenzylmononitrotetrahydro-closo-hexaborat(2-) / Synthesis, Spectra and Crystal Structure of cis-Monobenzylmononitrotetrahydro-closo-hexaborate(2-)
Authors: Drewes C. , Preetz W.
Published: February 2015

By electrochemical oxidation of (n-Bu4N)[B6H5Hfac(CH2Ph)] in the presence of nitrite ions in dichloromethane solution cis-[B6H4(CH2Ph)(N O2)]2- is formed. X-ray diffraction analysis has been performed on a single crystal of cis-(Ph4P)2[B6H4(CH2Ph)(NO2)] HO2CH3CN (triclinic, space group Pl̅ a = 11.338(5), b = 11.377(5), c = 21.081 (5) Å, α = 93.727(5), ß = 98.872(5), γ = 105.926(5)°, Z = 2). The 11B NMR spectrum is consistent with a disubstituted octahedral B6 cage with local C2v symmetry. The IR and Raman spectra exhibit characteristic CH, NO2, BN, BH and B6 vibrations.
Carbacylamidophosphates: Structure and Properties of Bis(N,N′,-morpholido)-[(N″-morpholido)-carboxamido] phosphate
Authors: Gubina Kateryna E , Ovchynniko Vladimir A. , Amirkhanov Vladimir M , Sliva Tatyana Yu. , Skopenko Viktor V. , Glowiak Tadeusz , Kozlowski Henryk
Published: February 2015

The bis(N,N′-morpholido)-[(N″-morpholido)-carboxamido] phosphate: O(CH2CH2 )NC(O )-N(H)P(O)[N(CH2CH2 )O]2 [HL], has been prepared and characterized by means of IR, 31P and 1H NMR spectroscopy and X-ray diffraction (triclinic, a = 9.282(2), b = 9.308(2), c = 21.341(4) Å, α = 80.79(3)°, β = 80.92(3)° γ = 66.92(3)°, V = 1665.1(6) Å3, space group P1̄̄, Z = 4 and R = 0.0423, wR2 = 0.1303 for 6774 unique reflections used). The unit cell consists of two independent molecules connected by hydrogen bonds N-H...O=P into non-symmetric dimers. The compound behaves as a HL molecule with a protonation constant corresponding to the -C(O)N(H)P(O)- group of pK = 8.65 as determined by potentiometric studies.
Notizen: Polysulfonylamine, CXX II Nicht-konventionelle Wasserstoffbrücken in Bis[diphenylphosphino- (diphenylphosphinselenid)methan]- gold(I)-di(m ethansulfonyl)amid/Polysulfonylamines, CXXII. Non-Conventional Hydrogen Bonds in Bis[diphenylphosphino(diphenylphosphinselenide) methane]gold(I) Di(methanesulfonyl)amide
Authors: Ahrens Birte , Jones Peter G.
Published: February 2015

In the crystal structure of (dppmSe)2Au+ N(SO2CH3)2- (dppm = Ph2PCH2PPh2) chains are formed from non-conventional hydrogen bonds of the type C -H ···O . Within these chains two bifurcated hydrogen bond systems are present, each involving one methylene hydrogen (H···O 2.51, 2.65 Å) and one phenyl hydrogen (H···O 2.31, 2.35 Å) as donors.
The Silver(I) Mercury(II) Oxide Nitrate with the Empirical Formula AgHg2NO5
Authors: Mormann Thomas J. , Jeitschko Wolfgang
Published: February 2015

The title compound was prepared by solid state reaction of Ag2O with Hg(NO3)2· H2O in air at 350 °C. Its crystal structure was determined from single-crystal diffractometer data: Pnma, a = 620.1(1) pm, b = 670.1(1) pm, c = 1267.5(2) pm, Z = 4, R = 0.026 for 586 structure factors and 33 variable parameters. The compound may be represented by the formula Ag(HgO)2NO3 . The mercury(II) together with the oxygen atoms form zig-zag chains with linear coordination of the mercury atoms. The oxygen atoms of these chains are linked via silver(I) atoms, thus forming two-dimensionally infinite nets, which contain the trigonal planar nitrate groups in interstices. Thus, only secondary Hg-O and Ag-O bond are formed between the nets.
New Chalcogenogermanates with Adamantane Type Complex Anions: Preparation and Crystal Structures of K4Ge4S10; Rb4Ge4S10, Rb4Ge4Se10, and Cs4Ge4Se10
Authors: Klepp Kurt O. , Fabian Ferdinand
Published: February 2015

The title compounds were obtained by reacting stoichiometric quantities of the corresponding dialkalimonochalcogenide, germanium powder and chalcogen at 1073 K. The four compounds are isostructural, crystallizing in space group C2/c, Z = 4 with K4Ge4S10: a = 15.161(3), b = 15.198(2), c = 8.760(2) Å, ß = 105.36(3)°, Rb4Ge4S10: a = 15.282(7), b = 15.341(7), c = 9.061(4) Å , ß = 106.10(3)°; Rb4Ge4Se10: a = 16.095(9), b = 16.09(1), c = 9.390(7) Å , ß = 105.79(2)° and Cs4Ge4Se10: a = 16.348(9), b = 16.49(1), c = 9.771(3) Å, ß = 107.10(3)°. Their crystal structures were solved and refined from single crystal diffractometer data (MoKα radiation) obtained at 294 K. They are characterized by the formation of discrete adamantanelike complex anions [Ge4Q10]4- which are arranged in slabs parallel to (010). Mean Ge-S bond lengths are 2.202 A for K4Ge4S10 and 2.186 Å for Rb4Ge4S10 while the mean Ge-Se bond length in both selenides amounts to 2.332(3) Å. Terminal and bridging Ge-Q bonds differ by at least 0.1 Å. The atomic arrangement corresponds to that of Tl4Ge4S10.
(CH3NH3)2Sb2S4, a New Thioantimonate(III) with Building Groups Stabilized by Hydrogen Bonds
Authors: Schur Michael , Gruhl Astrid , Näther Christian , Jeß Inke , Bensch Wolfgang
Published: February 2015

(CH3NH3)2Sb2S4 has been isolated from the reaction of antimony with sulfur in the presence of manganese in an ethanolic solution of methylamine under solvothermal conditions. Two pyramidal SbS3 units are linked via common S-S edges to give dimeric Sb2S4
2- anions, which are joined via secondary Sb···S contacts of 3.074(2) and 2.975(2) Å forming infinite 1
∞ [SbS2]-2n chains consisting of edge-linked ψ-SbS4 trigonal bipyramids. The cis configuration of the Sb2S4
2- anions in the title compound is observed for the first time. A specific hydrogenbonding pattern between the amino-hydrogen and the sulfur atoms stabilizes this configuration and gives rise to anionic layers separated by the methyl groups.
Kristallstruktur von Tetraphenylphosphonium Dichloroiodat(I) [PPh4][ICl2] / Crystal Structure of Tetraphenylphosphonium Dichloroiodate(I) [PPh4][ICl2]
Authors: Minkwitz Rolf , Berkei Michael
Published: February 2015

Dichloroiodate Tetraphenylphosphonium dichloroiodate(I) [PPh4] [ICl2] crystallises in the monoclinic system in the space group P2/n with a = 1025.7(1), b = 770.2(1), c = 1446.4(1) pm, ß = 90.11(1)° and two formula units per unit cell. The ICl2
- anion is symmetrical (C2v) and almost linear with I-Cl bond lengths of 257.1(2) pm and a bond angle of 178.10(6)°.
Effekt der Germaniumisotope auf die chemische Verschiebung von 19F in Difluordimethylgerman und von 13C in Tetramethylgerman / Germanium Isotope Effect on the 19F Chemical Shift in Difluorodimethylgerm ane and the 13C Chemical Shift in Tetram ethylgermane
Authors: Büchner W. , Wolfsberger W.
Published: February 2015

An isotope effect of about -0.8 Hz at 188 MHz ( - 4 ppb) per two mass units on the 19F chemical shift in Me2GeF2 due to directly bonded 70Ge/ 72Ge/74Ge/76Ge has been observed. The analogous isotope effect on the 13C chemical shift in Me4Ge is about -0.045 Hz at 100.6 MHz (-0.45 ppb).
Synthesis and Structural Characterization of Metal Complexes of 2-Formylpyrrole 4N-Methylthiosemicarbazone (4ML1) and 2-Acetyl- pyrrole 4N-Methylthiosemicarbazone (4ML2). The X-Ray Crystal Structures of [Ni(4ML1-H)2], [Pd(4ML1-H)2] and [Cd(4ML2)2I2]
Authors: Alonso Ruben , Bermejo Elena , Carballo Rosa , astiñeiras Alfonso , Pérez Teresa
Published: February 2015

Reaction of 4N-methyl-2-[1-(pyrrol-2-yl)methylidene]hydrazinecarbothioamide (4ML1 and 4N-methyl-2-[1-(pyrrol-2-yl)-ethylidene]hydrazine carbothioamide (4ML1) with zinc(II), cadmium(II) and mercury(II) halides afforded complexes with formulas [M(L)X2] [(L; M; X) =(4ML1; Cd; Cl) (4), (4ML1; Hg; Cl, Br, I) (7 - 9), (4ML2; Cd; Cl) (17), (4ML2; Hg; Cl, Br, I) (20 - 22)] or [M(L)2X2] [(L; M; X) = (4ML1; Zn; Cl, Br, I) (1 - 3), (4ML1; Cd; Br, I) (5, 6), (4ML2; Zn; Cl, Br, I) (14 - 16), (4ML2; Cd; Br, I) (18, 19)]. Reaction of 4ML1 with salts of copper(II), nickel(II), palladium(II) and platinum(II) afforded complexes of formula [M(4ML1-H)2] (10 -13). Crystals of 11, 12 and 19 were studied by X-ray diffractometry, and all new compounds were characterized by elemental analysis, mass spectrometry, and IR, electronic and 1H and 13C NMR spectroscopy and, when pertinent and allowed by the solubility of the compound, 113Cd or 199Hg NMR spectroscopy. In the complexes of Group 12 metals, both ligands are neutral and S-monodentate. In the complexes of copper or Group 10 metals, 4ML1 is monodeprotonated and S,N-bidentate.
A New Binuclear Lutetium(III) Dimethyl-N-trichloroacetylamidophosphate Complex with a γ, γ'-Dipyridyl Bridge, {Lu[CCl3C(O)NP(O)(OCH3)2]3}2-μ(γ,γ'-dipy)
Authors: Trush Victor A. , Swiatek-Kozlowska Jolanta , Skopenko Victor V. , Amyrkhanov Vladimir M.
Published: February 2015

A new type of binuclear coordination compound of lutetium, {Lu2L6 · μ-(γ,γ '-dipy)} (where L = dimethyl-N-trichloroacetylamidophosphate anion and γ,γ '-dipy = 4,4'-dipyridyl), has been obtained. The IR spectroscopic data reveal that the ambidentate phosphoryl ligand is coordinated to the metal center in a bidentate manner via the phosphoryl and carbonyl oxygen atoms. The crystal and molecular structure of {Ln2L6-μ-(γ ,γ '-dipy)} has been determined by means of X-ray diffraction (triclinic, space group P i with parameters: a = 9.259(2), b = 12.530(3), c = 16.548(3) Å, α = 85.44(3)°, β = 75.64(3)°, γ = 70.56(3)°, Z = 1). The structure is made up of centrosymmetric binuclear molecules, in which the neutral heterocyclic ligand is coordinated to the metal centers in a bidentate bridging manner via its nitrogen atoms. The coordination number of each Lu(III) atom is 7 [60(L-) + N((γ ,γ '-dipy)]. Phosphoryl and carbonyl groups of the L- ligands are disposed in syn-position and are included in the six-membered chelate metallocycles. The coordination polyhedron of lutetium can be described as distorted mono-capped octahedron.
Reaktionen von C(NMe2)4 mit Carbonylverbindungen der 6. Gruppe. Kristallstrukturen von [C(NMe2)3][(CO)5CrC(O)NMe2], [C(NMe2)3]2[Mo2(CO)10] und [C(NMe2)3][(CO)4Mo(O2CNMe2)] / Reactions of C(NMe2,)4 with Group 6 Carbonyl Compounds. Crystal Structures of [C(NMe2 )3 ][(CO)5 CrC(O)NMe2], [C(NMe2)3]2[Mo2(CO)10] and [C(NMe2)3][(CO)4 Mo(O2CNMe2)]
Authors: Petz Wolfgang , Neumüller Bernhard , Lorberth Jörg , Megges Klaus , Massa Werner
Published: February 2015

The reaction of C(NMe2)4 (1) with M(CO)6 (M = Cr, W) in THF solution leads to the anionic carbamoyl complexes [C(NMe2)3][(CO)5MC(O)NMe2] (2a, M = Cr; 2c M = W). In the case of M = Mo the resulting complex 2b is not obtained; instead, the salts [C(NMe2)3]2[Mo2(CO)10] (3) and [C(NMe2)3][(CO)4Mo(O2CNMe2)] (4) are isolated. The crystal structures of 2a, 3, and 4 are presented. In the salt-like compounds no interatomic contacts between anion and cation exist, and the cations are disordered. The structure of 4 shows two independent molecules. The compounds were further characterized by IR and NMR spectroscopy.
Total Synthesis of S-(+)-Argentilactone
Authors: Saeed Muhammad , Abbas Muhammad , Khan Khalid Mohammad , Voelter Wolfgang
Published: February 2015

Asymmetrie Total Synthesis Asymmetrie total synthesis of S-(+)-argentilactone (2) was accomplished, using methyl-a-D-glucopyranoside (3) as carbohydrate template. Benzylidene acetal 5 was hydrolysed with tBuOOH/AlCl3 and further manipulated to produce the aldehyde 10. A Wittig reaction and subsequent oxidation of the anomeric position yielded the target argentilactone.
Synthesis and Crystal Structure of a Novel Polymeric Lead(II) Complex with Thiosemicarbazonato and Thiocyanate Ligands
Authors: Castiñeiras Alfonso , Domínguez Ricardo , Bresolin Leandro , Bordinhão Jairo , Bortoluzzi Adaílton João , Hörner Manfredo
Published: February 2015

A novel heptacoordinated thiosemicarbazonato lead(II) complex [Pb(4ML)(SCN)] (4ML = 2-Acetylpyridine-4N-methylthiosemicarbazonato) was synthesized and characterized by conventional methods (IR and elemental analysis) and single-crystal X-ray diffraction. [Pb(4ML)(SCN)] shows an unusual polymeric structure in which the lead atom is hexa-coordinate, the deprotonated thiosemicarbazone both chelates and bridges, and the thiocyanate group acts as bridge between lead(II)-thiosemicarbazonate fragments. There is hydrogen-bonding between the polymeric chains. The complex crystallizes in the triclinic space group P 1̅̅ with a = 7.461(2), b = 9.572(2), c = 11.235(2) Å, α = 66.51(3), β = 84.01(3), γ = 68.75(3)°, V = 685.1(2) Å3, Z = 2.
Synthese und Struktur des Kalium-tetrakis(triisopropylsilylphosphanyl)indats / Synthesis and Structure o f Potassium Tetrakis(triisopropylsilylphosphanyl)indate
Authors: Westerhausen Matthias , Weinrich Sabine , Piotrowski Holger
Published: February 2015

The metalation of triisopropylsilylphosphane with potassium bis(trimethylsilyl)amide yields quantitatively colorless pyrophoric potassium triisopropylsilylphosphanide (1 ) which is insoluble in hydrocarbons. The reaction of 1 with indium(III)chloride in toluene gives potassium tetrakis(triisopropylsilylphosphanyl)indate (2) in a rather poor yield. In the solid state this compound shows the formation of a one-dimensional polymeric chain with the indium as well as the potassium atoms in a distorted tetrahedral environment. The mean In-P and K-P bond lengths are 257.0 and 330.4 pm, respectively.
Structural Characterization Of Rh(Iii) Complexes Containing The Polypyridyl Ligands And Some Properties Of Their Derivatives
Authors: Kim Mee Y. , Seok Won K. , Lee Heung N. , Han Sung H. , Dong Yongkwan , Yun Hoseop
Published: February 2015

The structures of the compounds [Rh(bpy)2(py)(Cl)](ClO4 )2 (2 (ClO4 )2) and [Rh(phen)2(py)- (Cl)](ClO4 )2 (7 -(ClO4 )2) were determined by single-crystal X-ray diffraction. Both complexes show a six-coordinate rhodium atom with two bpy or phen ligands in the cis configuration. The Rh-Cl distances are 2.334(3) and 2.323(2) Å, respectively. The bond angles N-Rh-Cl formed with the axially-positioned nitrogen atom are 174.4(2) and 173.8(2)°. The oxidation of aquo complexes, prepared from the corresponding rhodium chloride complexes, by two equivalents of Ce(IV) in 60% HCIO4 solution yields the corresponding mono-oxo products. All complexes have been identified and characterized by elemental analyses, IR, and 1H NMR data
4′, x-Seco And 4′,x-4′,5′-Diseco C-Nucleosides From 2-Hydrazino-(3H)- Thieno [2,3-D] Pyrimidin-4-Ones
Authors: Hamed Atef A. , Bader Hesham F. , El-Ashry El-Sayed H.
Published: February 2015

Cyclization of 2-hydrazino-5,6-dimethyl-3H-thieno[2,3-d]pyrimidin-4-one (1) with acetic acid gave 3,6,7-trimethyl-l,2,4-triazolo[3,4-a]thieno[2,3-d] pyrimidin-5-one (5) whose Dimroth rearrangement gave 2,6,7-trimethyl-l,2,4-triazolo[3,4-a]thieno[2,3-d]pyrimidin-5-one (11). Alternatively, 5 was obtained from the dehydrogenative cyclization of acetaldehyde 5,6- dimethyl-4-3H-oxo-thieno[2,3-d]pyrimidin-2-yl hydrazone (7). Reaction of 1 and 2 with a number of sugars gave the respective hydrazones 19 and 20. Those of the D-glucose exist in the cyclic pyranosyl structure in addition to minor amounts of the acyclic structure. Dehydrogenative cyclization of the sugar hydrazones gave the respective fused tricyclic compounds 25 and 26
Darstellung und Strukturaufklärung von Tricäsiumundecaphosphid- Ammoniakat(1/3) Cs3P11 · 3 NH3 / Synthesis and Crystal Structure of Tricesium Undecaphosphide-Ammonia(l/3) Cs3P11 · 3 NH3
Authors: Knettel Doris , Reil Markus , Korber Nikolaus
Published: February 2015

Cs3 P11 · 3 NH3 was obtained from a solution of Cs3P11 in liquid ammonia. Its structure consists of P11
3--cage anions, which coordinate the cesium cations together with ammonia molecules, resulting in a three-dimensional network. The compound completes a family of structures that are derived from the binary phosphide Cs3P11, through the stepwise expanding and dismantling of the three-dimensional network of ions by ammonia molecules of coordination or through the exchange of the cesium cations for voluminous molecular cations.
Magnetic Properties and Crystal Structure of a 3,5-Dimethylpyrazolate-Bridged Binuclear Copper(II) Complex
Authors: Elerman Y. , Elmali A.
Published: February 2015

[Cu2L(prz)] (prz = 3,5-dimethylpyrazole and L = 1,3-bis(5-bromo-2-hydroxybenzylidene)- propan-2-ol) was synthesized and its crystal structure determined. It crystallizes in the orthorhombic space group Pbca with a = 14.160(9), b = 15.109(4), c = 21.298(5) Å, V = 4557(1) A3, Z = 8 . Two copper(II) ions are in a square-planar coordination. The metal coordination sphere is four-coordinate, with a planar N2O2 donor set. The dihedral angle between the two coordination planes is 12.14(7)°. The copper(II) centers are separated by 3.365(1) Å and antiferromagnetically coupled (J = -214.3 cm-1), which follows from temperature-dependent magnetic susceptibility measurements in the temperature range 4.6 to 310 K. The Cu-O-Cu angle is 125.9(1)° in the super-exchange pathway. The magnetic moment at 310 K is ca. 1.76 B.M. and 0.13 B.M. at 4.6 K.
Structure Determination for the Crystalline Phase of Triphenyl Phosphite by Means of Multi-Dimensional Solid-State NMR and X-Ray Diffraction
Authors: Senker Jürgen , Lüdecke Jens
Published: February 2015

The crystalline phase of triphenyl phosphite P(OC6H5)3 was investigated by means of 31P solid-state NMR and X-ray diffraction in a temperature range between 170 K and its melting point (Tm = 293 K). ID MAS NMR spectra exhibit one sharp central resonance indicating only one crystallographically unique molecule in the unit cell. A theoretical analysis concerning the shape of 2D exchange spectra for 1 = 1 /2 nuclei is presented. It is shown that if the exchange is caused by radio-frequency driven spin-diffusion, this technique allows to discriminate rotational symmetry elements in crystalline solids. Used on crystalline triphenyl phosphite, 3-fold symmetry could be revealed clearly. Structure determination based on X-ray single crystal diffraction data collected at 191 K shows that triphenyl phosphite crystallises in hexagonal metric with space group R3̅(wR2= 8.3%, Z = 18) and one molecule in the asymmetric unit. This result is in excellent agreement with the NMR spectroscopic data. The lattice parameters at 200 K were determined to a = 37.887(1) and c = 5.7567(2) Å (V = 7156(1) Å3) by refining an X- ray powder-diffraction pattern. The structure of triphenylphosphite can be described as a close rod packing. The rods are formed by ecliptically arranged triphenylphosphite molecules. Due to the 3-fold rotoinversion axis the orientation of molecules in neighboured rods is antiparallel.
Amido-tert-butylimido-vanadium(V)-Verbindungen. Darstellung, Reaktionen und 51V-NMR-spektroskopische Untersuchungen / Amido-tert-butylimidovanadium(V) Compounds. Synthesis, Reactions and 51V NMR Spectroscopic Studies
Authors: Preuss Fritz , Vogel Monika , Fischbeck Uwe , Pemer Jens , Overhoff Gerhard , Fuchslocher Edith , Tabellion Frank , Geiger Barbara , Wolmershäuser Gotthelf
Published: February 2015

The reactions of tBuN = VCl2 · DME with LiX (X = NHtBu, NR2, OSiPh3, SR, Alkyl, Cp) have been studied. LiNHtBu and LiCH3 furnish the binuclear diamagnetic tert-butylimido-vanadium( IV) compounds [(μ-NtBu)2V2X4]; in all other cases only the vanadium(V) compounds tBuN=VX3 and tBuN=VCpCl2 formed by disproportionation reactions of vanadium(IV) can be isolated. The syntheses of various mononuclear amido tert-butylimido-vanadium(V) complexes as well as of the binuclear complexes [μ-NtBu)2V2(NtBu)2Cl2] and [(μ-0)V2(NtBu)2Cp2Cl2] are also described. All compounds obtained have been characterized by 51V NMR spectroscopy. tBuN=V(OMe)3 was investigated by X-ray diffraction analysis; the molecular structure has been found to be that of a binuclear vanadium(V) complex with two bridging methoxo ligands.
peri-Interactions in Naphthalenes, 5 [1]. On the Impact of peri-Stress and Trityl-Stress upon the Length of N+-C Bonds in 1-Azonia-acenaphthene Cations
Authors: Dyker Gerald , Hagel Marcel , Henkel Gerald , Köckerling Martin , Näther Christian , Petersen Sönke , Schiemenzd Günter Paulus
Published: February 2015

In the 1-azonia-acenaphthene salts 6b and 9, the N+-Cperi bond is modestly elongated. While no clear-cut influence of the peri-stress is obvious, incorporation of Cperi in a triarylmethyl structure has a bond-lengthening effect. However, the stretching forces are insufficient to restore the ideal geometry of the naphthalene skeleton.
Orthoamide, LVII [1]. Lassen sich aromatische Aldehyde nach Fries aus Arylformiaten hersteilen? / Orthoamides, LVII [1]. Can Aromatic Aldehydes be Prepared from Aryl Formates via the Fries Rearrangement?
Authors: Ziegler Georg , Haug Erwin , Frey Wolfgang , Kantlehner Willi
Published: February 2015

The aromatic hydroxyaldehydes 3a-3g, 5a-5f, 8 , 10 can be prepared by the action of BCl3, BBr3 or trifluoromethanesulfonic acid, on the aryl formates 1a-1f, 4a-e, 7, 9 via Fries rearrangement. BBr3 is more effective than BCl3. The activating ability of BBr3 can be improved by addition of FeCl3. Rearrangements which are induced by trifluoromethanesulfonic acid can give rise to the formations of regioisomers, which might be different from the products formed when the reaction is performed with Lewis acids. The yields of the aldehydes are lowered by subsequent condensation reactions. This view was confirmed by the isolation of a condensation product, which was characterized as a dibenzo[a,j]xanthene derivative 6 by crystal structure analysis. For the Fries rearrangement of formyl groups a new mechanism is proposed. 2-Hydroxy-1-naphthaldehyde 5c can be obtained in good yield from formic acid, BBr3, and 2 -naphthol.
Nukleophile Aromatische Substitution an 2-Fluoroimidazolium-Ionen: Synthese und Kristallstruktur eines dikationischen 2,2-Biimidazolyl- Derivates [1] / Nucleophilic Aromatic Substitution at 2-Fluoroimidazolium Ions: Synthesis and Crystal Structure of a Dicationic 2,2′-Biimidazolyl Derivative [1]
Authors: Kuhn Norbert , Weyers Gerd , Bläser Dieter , Boese Roland
Published: February 2015

The dicationic 2,2-biimidazolyl derivative 5 has been obtained from the imidazolium salt 3 and the carbene 4 in good yield. The presence of the carbene 4 and its unstable dimer 7 were detected by NMR in the reduction product of 5 with potassium. The crystal structure of 5·H2O is reported.
Synthesis and Structure of RE2Rh2Cd (RE = La, Ce, Pr, Nd, Sm)
Authors: Stadler Florian , Fickenscher Thomas , Pöttgen Rainer
Published: February 2015

New intermetallic cadmium compounds RE2Rh2Cd (RE= La, Ce, Pr, Nd, Sm) were synthesized from the elements in sealed tantalum tubes in a high-frequency furnace. They were characterized through X-ray powder data: Mo2FeB2 type, space group P4/mbm, Z = 2. Single crystal data of the cerium compound (a = 762.8(1), c = 377.8(1) pm, wR2 = 0.0662, 199 F2 values, and 13 variable parameters) revealed small defects on the rhodium position leading to the composition Ce2Rh186(3)Cd for the investigated crystal. According to the course of the cell volumes Ce2Rh2Cd may be classified as a mixedvalent compound. The Ce2Rh2Cd structure is an intergrowth of slightly distorted AlB2 and CsCl related slabs of compositions CeRh2 and CeCd. Within the CeRh2 slab short Ce-Rh contacts (284-300 pm) are indicative of strong Ce-Rh bonding. The Rh-Rh distance within the AlB2 related slab is 289 pm.
Effect of a Thermal Treatment on the Activity of Carbon-Supported Pt, Pt+W and Pt+Mo Electrocatalysts for Methanol Oxidation Reactions
Authors: Gökağaç Gülsün , Leger Jean-Michel
Published: February 2015

Previous studies on carbon supported Pt, Pt+W and Pt+Mo indicated that Pt+Mo was the most active electrocatalyst at low potentials and that Pt+W has similar properties as pure Pt in methanol oxidation. Those samples were thermally treated at 900 °C in a hydrogen gas atmosphere for 6 hours to observe the effect on metal particle sizes and on their distribution on carbon support. It was found that thermally treated Pt+Mo/XC-72 remains the most active catalyst at all potentials compared to the other heated samples. The heat treatment caused the sintering of small particles leading to a decrease in activity of the catalysts except Pt+Mo/XC-72. The heat treated samples were characterised by voltammetry, X-ray diffraction, transmission electron microscopy and energy dispersive X-ray analysis techniques. The methanol oxidation reaction was followed by in-situ FTIR spectroscopy to identify products and adsorbed species on the surface of electrode.
Synthese und Struktur oxoverbrückter, M(CO)5 geschützter Hexa-Germanium-Käfigverbindungen /Synthesis and Structure of Oxo-Bridged, M (CO)5 Protected Hexagermanium Cage Compounds
Authors: Renner Gerd , Huttner Gottfried , Rutsch Peter
Published: February 2015

Na2[M2(CO)10] and GeCl4 react to give the compounds [(CO)5MGeCl3]- , 1a - 1c (M = Cr, Mo, W). From M(CO)5·THF and Gel2 in the presence of I- compounds [(CO)5MGeI3]-, 2a - 2c (M = Cr, Mo, W) are obtained. Compounds 2a and 2c react with alkoholates or thiolates to produce the cage compounds [{(CO )5Cr}6Ge6(μ2-OH )2(μ3- O)6]2-, 3, [{(CO)5Cr}6Ge6 - (μ2-OEt)2(μ2-O)4(μ3-O)2]2- , 4, and [{(CO)5W }6Ge6(OR)2(μ2- O)2(μ3-O)4]2- , 5. A structural pattern common to all these compounds is an idealised octahedral arrangement of six germanium atoms. Each of these six germanium atoms binds to an M(CO)5 protective group. The germanium atoms are integrated in the core of the cage compounds by μ3-O , μ2-O and μ2-OH bridges. The co-ordination number of germanium is generally four, with one bond radiating to the external M(CO)5 building block. In compounds 3 and 4 the remaining three germanium bonds radiate to the bridging groups within the cage. Compounds 5 contain two germanium centres which are linked to the cage by only two bonds and with the two remaining bonds to the external M(CO)5 entity and to a terminal OR or SR group. Syntheses and structures of compounds 1 - 5 are described.
CD-Spectroscopic Investigations for the Determination of the Absolute Configuration of (4R,6S,7S)-Serricomin
Authors: Fleischhauer Jörg , Gabriel Sven , Enders Dieter , Wollmer Axe
Published: February 2015

The absolute configuration of the conformationally flexible (4R,6S,7S)-serricornin, a non­ natural isomer of the female-produced sex pheromone of the cigarette beetle (Lasioderma serricorne), was determined by comparison of measured and calculated circular dichroism spectra. The rotational strengths were calculated by means of the semiempirical CNDO/2S-method. The total synthesis was accomplished by the SAMP/RAMP-hydrazone method.
Der Bankenstresstest 2014 im Vorfeld des Single Supervisory Mechanism: Theorie und Empirie zu einem Lackmustest der neuen europäischen Bankenregulierung
Authors: Horsch Andreas , Kleinow Jacob
Published: February 2015

Zu den Konsequenzen der Krisenprozesse auf den Finanzmärkten zählt unter anderem eine massive Regulierung bestimmter Finanzintermediäre. Insbesondere sind Anzahl und Befugnisse bankaufsichtlicher Organisationen seit 2007 ausgebaut worden. Im Zuge dessen wird zu selten aus ökonomischer Sicht analysiert, inwieweit die einzelnen Regulierungen zu rechtfertigen sind. Der Beitrag fokussiert eines der neuen Regulierungsinstrumente und prüft, inwieweit es im Sinne einer Marktdisziplinierung tatsächlich wirksam wird: Hierzu wird erstmals der jüngste Stresstest der europäischen Bankenregulierer per Ende 2014 analysiert. Dabei geht der Beitrag mit Hilfe der Ereignisstudienmethodik der Forschungsfrage nach, ob und inwieweit dieser reformierte Stresstest einen Informationsgehalt für diejenigen Kapitalmarktteilnehmer besessen hat, die (potenzielle) Aktionäre der bewerteten Banken waren. Aus der Event Study resultieren abnormale Renditen von hoher Signifikanz, die klare Aussagen hinsichtlich der Hypothesen über einen Zusammenhang von Testergebnis und Kursentwicklung und damit letztlich über den Informationsgehalt des Stresstests zulassen. Die Veröffentlichung der Stresstest-Resultate hat demnach grundsätzlich Einfluss auf den Wert der getesteten Banken. Zudem unterscheiden sich die Resultate für durchgefallene Banken von denen der anderen Institute.
Matrix Transforms of Summability Domains of Normal Series-to-Series Matrices
Authors: Ants Aasma
Published: February 2015

In the present paper matrix transforms of summability domains CSA of normal series-to-series matrices A are investigated. Let M be a matrix and B a triangular series-to-series matrix. Necessary and sufficient conditions for M to be a transform from CSA into CSB are found. For application the special case, when A is a series-to-series Riesz matrix, are studied.
IMPACT OF 4-NONYLPHENOL ON TESTOSTERONE PRODUCTION IN MICE LEYDIG CELLS
Authors: Jambor TomÃ¡Å¡ , Lukáčová Jana , Tvrdá Eva , Kňažická Zuzana , Forgács Zsolt , Lukáč Norbert
Published: February 2015

Nonylphenol (NP) is an important environmental toxicant and potential endocrine disrupting chemical. It is also the primary final biodegradation product of nonylphenol polyethoxylate, a non-ionic surfactant that is frequently incorporated into detergent formulation. Several studies have reported adverse effects of NP on the male reproductive system, including hormonal changes and testicular abnormalities. However, its mechanisms are not clearly understood. In the present study, experiments were performed to examine the effects of 4-nonylphenol on the testosterone production in mice Leydig cells. Interstitial (Leydig) cells were cultured with addition of 0.04, 0.2, 1.0, 2.5 and 5 μg/mL of 4-nonylphenol and compared with control. Concentrations of testosterone in the media were determined using enzyme linked immunosorbent assay (ELISA). Hormone production significantly (P
EFFECT OF NATURAL PLANT EXTRACTS ON PORCINE OVARIAN FUNCTIONS
Authors: Kádasi Attila , Štochmaľová Aneta , Maruniaková Nora , Kolesárová Adriana , Grossman Roland , V. Sirotkin Alexander
Published: February 2015

This report provides information about the impact of chosen natural plant extracts on basic ovarian functions. This article summarizes our results concerning the effect of selected plant extracts on proliferation, apoptosis and hormone secretion – release of progesterone (P4), testosterone (T) and leptin (L) on porcine granulosa cells (GC), We analyzed effects of ginkgo (GB), rooibos (RB), flaxseed (FL), green tea polyphenols (GTPP), green tea - epigallocatechin-3-gallate (EGCG), resveratrol (RSV) and curcumin (CURC) (0; 1; 10 and 100 μg.ml-1) on markers of proliferation, apoptosis and secretory activity of porcine ovarian granulosa cells by using immunocytochemistry and EIA. It was demonstrated, that all these natural plants and plant molecules inhibited the accumulation of proliferation-related peptide (PCNA) and apoptosis-associated peptide (Bax) in cultured. Furthermore, it was observed that natural plant extracts altered progesterone, testosterone and leptin release in porcine ovarian cells. It is concluded, that GB, RB, FL, RSV, CURC, GTPP and EGCG can directly affect ovarian cells and therefore they could potentially influence ovarian functions.
ASSESSMENT OF T-2 TOXIN EFFECT AND ITS COMBINATION WITH GROWTH FACTOR AND METABOLIC HORMONES ON 17β-ESTRADIOL SECRETION BY RABBIT OVARIAN FRAGMENTS IN VITRO
Authors: Kolesárová Adriana , Maruniaková Nora , Kádasi Attila , Packová Dagmara , Halenár Marek , V. Sirotkin Alexander , Bulla Jozef
Published: February 2015

Assessment of T-2 effect and its combination with growth factor IGF-I, metabolic hormones leptin and ghrelin on 17β-estradiol secretion by rabbit ovarian fragments was studied. Rabbit ovarian fragments were incubated without (control group) or with alone T-2 toxin (0.01; 0.1; 1; 10; and 100 ng.mL-1), or its combination with insulin-like growth factor I - IGF-I (100 ng.mL-1), leptin (1000 ng.mL-1) or ghrelin (500 ng.mL-1) for 24 hours. Secretion of 17β-estradiol was determined by ELISA. T-2 toxin was not shown to be potential regulator of 17β-estradiol secretion in rabbit ovarian fragments. On the other hand T-2 toxin at all used doses combined with IGF-I significantly (P
IMPACT OF THE T-2 TOXIN AND QUERCETIN ON RABBIT PLASMA LEVELS OF THYROTROPIN AND THYROXINE IN VIVO
Authors: Kováčik Anton , Packová Dagmara , Kolesárová Adriana
Published: February 2015

The aim of this article was to study the effect of quercetin combination with T-2 toxin to secretion of thyrotropin and thyroxine in vivo. The rabbits were divided into the control group (without quercetin and T-2 toxin), and four experimental groups with different doses of quercetin. The thyrotropin (TSH) secretion was not significantly affected by intramuscular application of quercetin and T2-toxin against control group. The secretion of TSH was non-significatly decreased by addition of T2-toxin (group 1), but it was increased after application of quercetin with T2-toxin (groups 2, 3, 4). Significant differences between control group and experimental groups were not observed in thyroxine (T4) secretion. The highest concentration of T4 was observed in group 3 and the lowest in group 2. Our results suggested protective effect of quercetin on TSH secretion.
ANALYSIS OF STABILITY OF TRINUCLEOTIDE TTC MOTIFS IN COMMON FLAX PLANTED IN THE CHERNOBYL AREA
Authors: Lancíková Veronika , Hlavačková Lucia , Žiarovská Jana , Kubíková Hana , Bežo Milan , Ražná KatarÃ­na , Danchenko Maksym , Rashydov Namik , Hajduch Martin
Published: February 2015

Flax (Linum usitatissimum L.) is one of the oldest domesticated plants — it was cultivated as early as in ancient Egypt and Samaria 10,000 years ago to serve as a source of fiber and oil, whence it later spread around the world. Compared with other plants, the flax genome consists of a high number of repetitive sequences, middle repetitive sequences and small repetitive sequences of nucleotides. The aim of the study was to analyze the stability of the existing trinucleotides motifs of microsatellite DNA of the flax genome (genotype Kyivskyi), growing in the Chernobyl conditions. The Chernobyl area is the most extensive “natural” laboratory suitable for the study of radiation effects. Over the last 20 years, the researches collected important knowledge about the effects of low and high radiation doses on the DNA isolated from the plant material growing on the remediated fields near Chernobyl and the plant material from fields contaminated by radioactive cesium 137Cs and strontium 90Sr. Using eight pairs of microsatellite primers, we successfully amplified the samples from the remediated fields. For each primer in the control samples and remediated samples, we detected 1 to 3 fragments per locus, each in size up to 120 to 250 base pairs. The applied microsatellite primers confirmed the monomorphic condition of microsatellite loci.
BIS(2-ETHYLHEXYL) PHTALATE AFFECTS SPERMATOZOA MOTILITY DURING SHORT-TERM IN VITRO CULTIVATION
Authors: Lukáčová Jana , Jambor TomÃ¡Å¡ , Kňažická Zuzana , Tvrdá Eva , Lukáč Norbert
Published: February 2015

Bis(2-ethylhexyl) phthalate is ubiquitous in the environment as a results of its widespread manufacture and use, as well as their high concentration in plastics and ability to migrate from them into the air, water and ground, and then enters foodstuffs. The present study evaluated the effects of BEHP at the doses 1, 10, 100 and 200 μg/mL on the motility of bovine spermatozoa during short-term in vitro cultivation. The CASA system with SpermVisionTM program was used to determine the spermatozoa motility. The initial evaluation showed the decrease of motility with significant differences (P 100 μg/mL of BEHP decreased motility significantly (P