bluuebunny/crossref_metadata_2025 huggingface dataset:
Schwingungsspektren und Normalkoordinatenanalyse der isotopomeren closo-Hexaiodohexaborate 11Bn
10B6-nI6
2-, n = 0 - 6
Authors: Thesing J. , Preetz W. , Baurmeister J.
Published: March 2015

Normal coordinate analyses for the ten isotopomers Cs2
11Bn
10B6-nI6, n = 0 - 6 , including the pairs of geometric isomers for n = 2, 3, 4 have been performed, based on a general valence force field. Using a set o f 8 force constants (e.g. fd(BB) = 1.45, fd(BI) = 2.33 mdyn/Å ) the calculated frequencies are in good agreement with observed IR and R am an bands measured at 10 or 80 K for Cs2B6I6 with natural abundance of B isotopes (~80% 11B , 20% 10B) as well as for 11B and 10B enriched derivatives. From the calculated atomic displacements and the potential energy distribution the classification in the 30 times more intense substituent (in-phase motions of B and I, ≤ 153 cm-1) and the weak cage vibrations (anti-phase displacements of B and I, ≥ 385 cm-1) is deduced. Only the cage modes show characteristic band patterns, explained by the superposition of the calculated spectra of the different isotopomers in accordance with their statistical abundance. There is an excellent conformity for the total symmetric A, vibration, but for the triply degenerate T lu and T 2g modes as a consequence of lowered site symmetry in the solid state more bands than calculated are observed.
Die Kristall- und Molekülstrukturen der Verbindungen [Cl4–xSn{Co(CO)4}x] mit x = 1,2 und 3 / The Crystal and Molecular Structures of the Compounds [Cl4-xSn{Co(CO)4}x] with x = 1,2 and 3
Authors: Klüfers Peter
Published: March 2015

The crystal structures of the compounds [Cl3SnCo(CO)4] 1, [Cl2Sn{Co(CO)4}2]2, and [ClSn{Co(CO)4}3]3, have been determined by X-ray crystallography. Sn is co-ordinated tetrahedrally by Cl- and Co-substituents, the co-ordination polyhedron of Co is a distorted trigonal bipyramid. The Sn -Cl- and the Sn-Co-distances both increase from 1 to 3 (Sn -Co: 247.7 in 1, 253.2 in 2, and 260.6 pm in 3).
1λ5,3 λ5-Diphosphorine (1 λ5,3 λ5-Diphosphabenzole), III [1, 2] / 1 λ5,3 λ5-Diphosphorines (1 λ5,3 λ5-Diphosphabenzenes), III [1, 2]
Authors: Fluck Ekkehard , Plass Winfried , Heckmann Gernot , Bögge Hartmut , Müller Achim
Published: March 2015

1,1,3,3-Tetrakis(dimethylamino)-diphosphete (3) reacts with diphenylacetylene and bis(trimethylsilyl)butadiin-1 ,3 to give 1,1,3,3-tetrakis(dimethylamino)-4,5-diphenyl-1 λ5,3λ5- diphosphorine (8) and 1,1,3,3-tetrakis(dimethylamino)-5-trimethylsilyl-4-(trimethylsilyl-ethinyl)-1λ5,3 λ5-diphosphorine (9). The new compounds are characterized by their NMR , mass and IR spectra. In addition, the results of an X-ray structure analysis of 9 are reported.
Synthese des offenkettigen Thioetherthiols ′S8′ -H2 und der Kronenthioether ′S8′ , Bzo2-12 S 4, Bzo4-24 S 8 und Bzo6-36 S 12; Röntgenstrukturanalyse von Bzo4-24 S 8 [1] / Syntheses of the Open-Chain Thioetherthiol ′S8′-H2 and the Crown Thioethers ′S8′, Bzo2-12 S 4, Bzo4-24 S 8 and Bzo6-36 S 12; X-Ray Structure of Bzo4-24 S 8
Authors: Seilmann Dieter , Lechner Peter , Moll Matthias , Knoch Falk
Published: March 2015

The octadendate thioetherthiol ′S8′ - H2 was synthesized by alkylation of the tetradendate thioetherthiol ′S4′ - H2. Further products were the disulfide ′S8′, resulting from the oxidation of ′S8′ - H2, and the crown thioethers Bzo2 -12S4, Bzo4 -24S8 and Bzo6 -36S12. Bzo4 -24S8 was characterized by X-ray structure determination.
Zur Umsetzung von ReO2I(PPh3)2 mit PhNCO. Synthese und Kristallstrukturen von ReO2I(PPh3)2 · CHCl3, [ORe(OCONPh)I(PPh3)]3, Re(NPh)(NH2Ph)I2(PPh3)(OCONHPh) und Re(NPh)(NH2Ph)I2(PPh3) ( OReO3) / On the Reaction of ReO2I(PPh3)2 with PhNCO. Synthesis and Crystal Structures of ReO2I(PPh3)2 · CHCl3, [ORe(OCONPh)I(PPh3)]3, Re(NPh)(NH2Ph)I2(PPh3)(OCONHPh) and Re(NPh)(NH2Ph)I2(PPh3) ( OReO3)
Authors: Schmid S. , Strähle J.
Published: March 2015

PhNCO reacts with oxo ligands at metal centers to form phenyl nitrene complexes. As an intermediate of this reaction we obtained with ReO2I(PPh3)2 (1) the trimeric complex [ORe(OCONPh)I(PPh3)]3 (2) in which the PhNCO moiety was added to an oxo ligand to form an N -phenyl carbamato group. This group acts as a bridging ligand chelating one Re atom via its N and one O atom and coordinating an other Re atom by its second O atom . 2 crystallizes as 2 · 2 CHCl3 in the triclinic space group P1̄ with a = 1423.1(5), b = 2443.3(7), c = 1403.8(6) pm , α = 92.31(3), β = 94.76(3), γ = 81.48(3)°, and Z = 2. From the mother liquor of 2 after a few days Re(NPh)(NH2Ph)I2(PPh3)(OCONHPh) (3) is formed as a partial hydrolysis product. 3 is monoclinic with the space group P21/n and a = 1163.0(4), b = 2527.0(3), c = 1243.9(5) pm, β = 98.04°, Z = 4. The Re atom exhibits an octahedral coordination w ith the two I atom s in a ?ra«s-arrangem ent and the phenyl nitrene ligand trans to the m onodentate PhN HCO2 group. The coordination is completed by a phosphine and an aniline ligand. Reaction of 2 with excess PPh3 yields 1. It crystallizes from CHCl3 as 1 · CHCl3 in the monoclinic space group P21/n with a = 975.9(3), b = 2731(1), c = 1417.3(6) pm , β = 93.35° and Z = 4. In 1 the Re atom is pentacoordinated in form of a trigonal bipyram id with the two phosphine ligands in axial positions. A solution of 2 in THF forms Re(NPh)(NH2Ph)I2(PPh3) (OReO3) (4) upon exposure to air at room temperature. 4 is obtained as orthorhombic crystals with the space group Pca21 and a = 1727(1), b = 1064.2(4), c = 1765.7(9) pm , Z = 4, and is an analogue of 3 from which it can be derived by substituting the carbamato ligand by a perrhenat ion. In 3 and 4 the phenyl nitrene ligand is bound by a Re = N triple bond of 172 pm in a linear arrangement Re = N - Ph .
Bildung eines Kupfer-Nitratokomplexes aus einem Azidokomplex und Ozon. Die Kristallstruktur von (PPh4)2[CuCl(NO3)3] · CH2Cl2/ Formation of a Copper Nitrato Complex from an Azido Complex. Crystal Structure of (PPh4)2[CuCl(NO3)3] · CH2Cl2
Authors: Ruhlandt-Senge Karin , Bacher Alfred D. , Müller Ulrich
Published: March 2015

(PPh4)2[CuCl(NO3)3] · CH2Cl2 is formed when ozone reacts with (PPh4)2[Cu2(N3)6] in dichloromethane. Its crystal structure was determined by X-ray diffraction. Crystal data: a = 1113(1), b = 1156(1), c = 1965(2) pm , α = 101.02(1), β = 93.74(1), γ = 104.05(2)° at 130 K, space group P1̄, Z = 2, R = 0.057 for 3951 observed reflexions. The structure contains CH2Cl2 molecules and PPh4
+ and [CuCl(NO3)3]2- ions, with copper having coordination number 5. One nitrate ligand acts as a bidentate chelating unit, and the other two as monodentate ligands.
Übergangsmetallkomplexe mit Schwefelliganden, LXXVIII. H+-, Lewis-Säure-Basen- und Ligandentransferreaktionen von Thioether-Thiolat-Nickelkomplexen. Röntgenstrukturanalysen von [Mo(O)(′OS4′ )] und [Mo(O)(′NhS4′)]/Transition Metal Complexes with Sulfur Ligands, LXXVIII. H+-, Lewis Acid-Base and Ligand Transfer Reactions of Thioether-Thiolato-Nickel Complexes. X-Ray Structure Determinations of [Mo(O)('OS4')] and [Mo(O)('NHS4')]
Authors: Sellmann Dieter , Fünfgelder Stefan , Knoch Falk
Published: March 2015

In order to elucidate specific properties of nickel sulfur complexes, reactions of recently synthesized [Ni('S5')], [Ni('OS4')]2, [Ni('NHS4')]2, [Ni('S4-C5')]2 and [Ni('S4-C3')] were investigated ('OS4'2- = 2,2'-bis(2-mercaptophenylthio)diethylether(2-), 'NHS4'2- = 2,2'-bis(2-mercaptophenylthio)diethylamine(2-), 'S5'2- = 2,2'-bis(2-mercaptophenylthio)diethylsulfide(2-), 'S4-C5'2- = 1,5-bis(2-mercaptophenylthio)pentane(2-), 'S4-C3'2- = 1,3-bis(2-mercaptophenylthio)propane(2-)).

Reactions with proton acids, CH3COCl and cyanide led to de-coordination of the sulfur ligands, thus providing a convenient synthesis of multidentate thioether-thiolate ligands.

The reactions of these Ni complexes with metal salts or metal complexes led to ligand transfer from nickel to Pd(II), Mo(IV ) and Hg(II), [Pd('S4-C3')], [Hg('S5')], [Hg('S4-C3')]. [Hg('S4-C5')], [Mo(O)('S5')], [Mo(O)('NHS4')] and [Mo(O)('OS4')] were synthesized by this method. X-ray structure analysis proved that [Mo(O)('OS4')] and [Mo(O)('NHS4')] have a pseudooctahedral Mo coordination with cis-thiolate atoms and trans-ether or amine and oxogroup donors.

Template alkylation of [Fe(CO)2(S2C6H4)2]2- by 3-(N, N-bis-(2-bromoethyl)-amino)-propionic acid methyl ester leads to a multidentate ligand that contains functional groups in the side chain.
Synthese, Kristallstruktur und Konformation von N-Acetyl-Cα,α-diethylglycin/Synthesis and Crystal Structure of N-Acetyl-Cα,α-diethylglycine
Authors: Gałdecki Zdzisław , Luciak Bernard , Redliński Adam S. , Kaczmarek Krzysztof , Leplawy Mirosław T.
Published: March 2015

The compound CH3-CO-NH-C(C2H5)2-COOH was synthesized from the corresponding free amino acid. N-Acetyl-Cα,α-diethylglycine crystallizes in the monoclinic space group P21/c with a = 13.551(2)Å, b = 11.110(3)Å, c = 13.569(3)Å, β = 111.54(2)°, Z = 8 , D = 1.21 g/cm3. This structure was solved by direct methods and refined to R = 0.084. N-Acetyl-Cα,α-diethylglycine shows a fully extended conformation in its -N H-C(C2H5)2-CO- part.
Interaction between Binuclear Copper(I) Complexes and the Dioxygen Molecule Investigated by Electrochemical Methods
Authors: Nishida Yuzo , Watanabe Izumi , Unoura Kei
Published: March 2015

The cyclic voltammograms of some binuclear copper(II) compounds with binucleating ligands where two molecules of tridentate ligand, N, N -bis(benzimidazol-2-ylmethyl)amine are linked by several alkyl chains, were measured under both argon and dioxygen. The results demonstrate that the binuclear copper(I) species produced by electrochemical reduction exhibit high reactivity towards dioxygen, while the reaction of the corresponding mononuclear species with oxygen is very slow. Thin-layer coulometry ([binuclear copper(I)]/[O2] = 0.47 - 10.6) and thin-layer cyclic voltammetry ([binuclear copper(I)]/[O2] = 4.3 - 10.6 ) revealed that two molecules of the binuclear copper(I) species react with one molecule of dioxygen.
Darstellung und Kristallstruktur von K2Sn2S5 und K2Sn2Se5 / Preparation and Crystal Structure of K2Sn2S5 and K2Sn2Se5
Authors: Klepp Kurt O.
Published: March 2015

K2Sn2S5 and K2Sn2Se5 were prepared by reacting stoichiometric powdered mixtures of the binary compounds K2S or K2Se with Sn and the corresponding chalcogen at 1070 K, followed by slow cooling of the melt. The two compounds are isostructural and crystallize with the Tl2Sn2S5 structure type, s.g. C 2/c, Z = 4 with a = 11.072(5) Å, b = 7.806(3)Å, c = 11.517(5)Å, β = 108.43(2)° for K2Sn2S5 and a = 11.613(5)Å, b = 8.189(3) Å, c = 11,897(6) Å, β = 108.28(2)° for K2Sn2Se5. The crystal structures were refined to conventional R-factors of 0.032 and 0.031, respectively. Sn-atoms are in a distorted trigonal-bipyramidal chalcogen coordination. The average equatorial bond lengths are Sn -S: 2.427 Å and Sn -Se: 2.552 Å , the axial ones are Sn -S: 2.600 Å and Sn -Se: 2.774 Å.
The Polymorphism of Alkali Metal Formates, Part 3 A Raman Spectroscopic, X-Ray and Thermoanalytical Study of the Polymorphism of Lithium Formate
Authors: Müller Kerstin , Heyns Anton M. , Range Klaus-Jürgen , Zabel Manfred
Published: March 2015

The crystal structure of anhydrous lithium formate, published recently by Kansikas and Hermansson, is in fact that of a quenchable high-temperature modification (LiHCOO-I). The low-temperature modification LiHCOO-II can be obtained by thermal dehydration of the monohydrate, LiHCOO · H2O , or by drying it over P4O10. LiHCOO-II persists up to 228 °C, at which temperature it transforms to LiHCOO-I, which in turn is stable up to its melting point at 272 °C. LiHCOO-I is also the modification which crystallizes when a melt of lithium formate is cooled down, in spite of the fact that solidification occurs only at 165 °C, i.e. at a temperature well within the stability region of LiHCOO-II. The Raman spectra of the different forms of lithium formate are discussed in some detail.

Single crystals of LiHCOO-II, obtained by slow evaporation of a saturated solution of anhydrous LiHCOO in absolute methanol, are hexagonal, space group P63, with a = 14.915(2) Å, c = 5.543(1) Å and Z = 18. All lithium atoms are tetrahedrally coordinated by oxygen. The LiO4 tetrahedra are connected by corner-sharing and by bridging formate groups to form a complicated three dimensional network comprising tunnels running along [0 0 0 1 ]. No indications for an at least partial occupation o f these tunnels have been found.
Synthese und Kristallstruktur von Tris-μ-chlorodichloro- tetrakis(dichlorsulfan)diruthenium(II, III), eines unsymmetrisch substituierten, gemischtvalenten Ruthenium(II, III)-Komplexes mit SCl2-Liganden / Synthesis and Crystal Structure of Tris-μ-chlorodichlorotetrakis(disulfane)diruthenium(II, III) - an Unsymmetrically Substituted Mixed-Valence Ruthenium(II, III) Complex with SCl2 Ligands
Authors: Paulus Monika , Thiele Gerhard
Published: March 2015

Black crystals of Ru2S4Cl13 have been obtained by reaction of Ru with SCl2 in closed quartz ampoules at 125 °C. The crystal structure of the mixed-valence ruthenium(II, III) compound (monoclinic, a = 8.0262(15)Å, b = 14.9612(33)Å, c = 32.8876(55)Å, β = 97.03(1)°, space group P21/c, Z = 4) consists of molecules Ru2Cl5(SCl2)4, in which the two Ru atoms are unsymmetrically substituted by Cl and SCl2 ligands. Octahedral units of RuCl5 (SCl2) and RuCl3(SCl2)3 are Cl bridged to binuclear complexes Cl2(SCl2)Ru(μ-Cl)3Ru(SCl2)3.
Strukturuntersuchungen an Diaryldichalkogeniden: Die Molekülstrukturen von [2,4,6-(CF3)3C6H2S]2,[2,4,6-Me3C6H2Te]2 und [2-Me2N-4,6-(CF3)2C6H2Te]2 / Structural Investigations of Diaryl Dichalcogenides: The Molecular Structures of [2,4,6-(CF3)3C6H2S]2, [2,4,6-Me3C6H2Te]2 and [2-Me2N-4,6-(CF3)2C6H2Te]2
Authors: Edelmann Anja , Brooker Sally , Bertel Norbert , Noltemeyer Mathias , Roesky Herbert W. , Sheldrick George M. , Edelmann Frank T.
Published: March 2015

The Molecular Structures of [2,4,6-(CF3)3C6H2S]2 (1) [2,4,6-Me3C6H2Te]2 and [2-Me2N-4,6-(CF3)2C6H2Te]2 (3) have been determined by X-ray diffraction. Crystal data: 1: orthorhombic, space group P212121, Z = 4, a = 822.3(2), b = 1029.2(2), c = 2526.6(5) pm (2343 observed independent reflexions, R = 0.042); 2: orthorhombic, space group Iba 2, Z = 8, a = 1546.5(2), b = 1578.4(2), c = 1483.9(1) pm (2051 observed independent reflexions, R = 0.030); 3: monoclinic, space group P 21/c, Z = 4, a = 1118.7(1), b = 1536.5(2), c = 1492.6(2) pm, β = 98.97(1)° (3033 observed independent reflexions, R = 0.025).
Reaktive E=C (p-p)π-System e, XXX. Darstellung und Reaktivität der Fluorphosphaalkene Me2N -P = CF2 und Me2N -P = C(F)CF3 / Reactive E = C (p -p )π-Systems, XXX. Synthesis and Reactivity of the Fluorophosphaalkenes Me2N - P = CF2 and Me2N - P = C(F)CF3
Authors: Grobe Joseph , Le Van Duc , Martin Susanne , Szameitat Jürgen
Published: March 2015

Gas phase thermolyses of the stannylphosphanes Me3SnP(CF3)NMe2(3) and Me3SnP(C2F5)NMe2 (4) yield the novel amino substituted fluorophosphaalkenes Me2N -P = CF2 (1) (10 to 15% yield) and Me2N - P = C(F)CF3 (2) (90% yield), respectively. In contrast to other derivatives, 1 cannot be prepared by the reaction of the secondary phosphane Me2NP(H)CF3 (9) with secondary or tertiary amines or KOH. 1 and 2 are labile compounds which undergo quick oligomerization above 0 °C to (Me2NPCF2)n and (Me2NPCFCF3)n, respectively. By thermal degradation of (Me2NPCF2)n at 500 to 600 °C the trans- 1 ,3-diphosphetane (Me2NPCF2)2 (11) is formed in high yield. Reaction of 2 with cyclopentadiene leads to the corresponding [2+4] cycloadduct 2-dimethylamino-3-fluoro-3-(trifluoromethyl)-2-phosphabicyclo [2.2.1]-hept-5-ene (12). New compounds were characterized by spectroscopic methods (NMR, MS).
Flexible ein-und zweikernige Aralkyl-und Aralkoxyquecksilberverbindungen als Modelle zum Nachweis von Hg(II)-Hg(II)-W echselwirkungen / Flexible Mono-and Dinuclear Aralkyl and Aralkoxy Mercury Compounds for Detection of Hg (II)-Hg (II) Interactions
Authors: Öller Hans-Jürgen , Kiprof Paul , Schmidbaur Hubert
Published: March 2015

The aralkyl and aralkoxy mercury(II) compounds 1-(chloromercury(II)methyl)naphthalene (1), bis[1-naphthylmethyl]mercury(II) (2), 1-naphthyl(1-naphthylmethyl)mercury(II) (3), 1,8-bis[chloromercury(II)methyl]naphthalene (4), methylmercury(II)-benzylate (5), methylmercury( II)-1-naphthylmethylate (6) and bis[methylmercury(II)]μ-1,8-naphthalenediyl-bismethylate (7) have been prepared and characterized by means of NMRspectroscopy, mass spectrometry and elemental analysis. The molecular structure of compound 2 has been determined by single X-ray crystallography. The unit cell of 2 contains two crystallographically independent molecules, one of which is disordered. The interatomic distances and angles meet the expectations with Hg ⋯ Hg separations larger than 5.60 Å, indicating the absence of metal metal interactions.
Darstellung von Difluormethanimin F2C = NH und F2C = ND durch Hydrolyse von CF3NCO / Preparation of Difluoromethanimine F2C = NH and F2C = ND by Hydrolyses of CF3NCO
Authors: Pawelke Gottfried , Dammei Ralph , Poll Wolfgang
Published: March 2015

The title compounds have been prepared by controlled hydrolysis of CF3NCO in NEt3. Their 13C, 19F and 1H NMR spectra are reported and their I R gas and I R matrix spectra are discussed in terms of a normal coordinate analysis. The photoelectron spectrum of F2C = NH is compared with those of F2C = NF and H2C = NH revealing a strong fluoro effect. In the solid state F2C = NH is aggregated to infinite zig-zag chains by N • • • H hydrogen bonding.
Über die Wechselwirkung des Vanadyl(IV)-Kations mit Calcium-Hydroxylapatit / The Interaction of the Vanadyl(IV) Cation with Calcium Hydroxylapatite
Authors: Narda G.E. , Vega E. D. , Pedregosa J. C. , Etcheverry S. B. , Baran E. J.
Published: March 2015

Solid products obtained from calcium hydroxylapatite suspensions in diluted VO2+ solutions, under different experimental conditions, were investigated by means of X-ray powder diffractometry and IR and ESR spectroscopy. It is demonstrated that the VO2+ cation cannot be incorporated into the apatite-lattice but is strongly adsorbed on the surface of the material. Different aspects of this adsorption were thoroughly investigated. The ESR spectra suggest an inhomogeneous distribution of the adsorbed species and the generation of O = V (O)4 moieties, which show a high stability towards oxidation.
Polysulfonylamine, XXXI. Kristallstruktur von (1-Trichlormethylthio- 4-dimethylaminopyridinium)dimesylamid bei -95 °C / Polysulfonylamines, XXXI. Crystal Structure of 1-Trichloromethylthio- 4-dimethylaminopyridinium Dimesylamide at -95 °C
Authors: Jones Peter G. , Näveke Martina , Blaschette Armand
Published: March 2015

The crystal structure of the title compound was determined at -9 5 °C. It crystallizes in space group P1̄ with a = 577.5(3), b = 820.2(3), c = 1916.6(8) pm, α = 83.34(2), β = 82.83(2), γ = 83.61(2)° and Z = 2. The final R value was 0.034 for 3019 unique observed reflections. The presence of aggregates of four ions (two cations and two an­ ions) in the solid state is observed, with short cat-ion-anion contacts SII ⋯ O (290 pm) and Cl ⋯ O (298 pm). The bond lengths of the 4-dimethylaminopyridinium moiety of the cation suggest a semiquinoid resonance form with a double bond to the nitrogen of the dimethylamino group and two localized double bonds in the ring. The ring, the dimethylamino group (except H atoms) and the Sn atom are coplanar. The SII -N bond length is 170.3 pm, the N -SII -C angle 99.6°. The SII -C bond is approximately perpendicular to the ring plane.
The Final Structures of the Lichen Chromones Galapagin, Lobodirin, Mollin, and Roccellin
Authors: Huneck Siegfried , Jakupovic Jasmin , Follmann Gerhard
Published: March 2015

The structures of the lichen chromones galapagin, lobodirin, mollin, and roccellin, specific com­ pounds of Roccellaceae (lichens), have been es­ tablished as 1, 2, 3, and 4, respectively, by NOE difference spectroscopoy.
Synthese und Kristallstruktur von Bis(m-aminobenzonitril)- diquecksilber(I)-dinitrat/Synthesis and Crystal Structure of Bis(m-aminobenzonitrile)dimercury(I)-dinitrate
Authors: Brodersen Klaus , Hofmann Jürgen
Published: March 2015

The structure of bis(m-aminobenzonitrile)dimercury(I) dinitrate, [Hg2(m -NH2C6H4CN)2](NO3)2 has been determined by single crystal X-ray diffraction techniques and refined to an Rw-value of 0.022. The crystals are triclinic, space group P1 with a = 5.4878(1) Å, b = 8.4085(1) Å, c = 9.6062(1) Å, α = 92.599(3)°, β = 94.763(3)°, γ = 89.614(3)° and Z = 1.

The Hg2
2+-ion [Hg-Hg 2.524(1) Å] is approximately axially coordinated to amino nitrogen atoms [Hg - N 2.209(4) Å, Hg - Hg - N 169.5(3)°]. Additional amino hydrogen bonds to oxygen are building chains along the b-axis containing units of L - Hg - Hg - L groups.
Über die Natur der Cu2+-Zentren im NH4Cl - die spektroskopische Untersuchung von Cu2+-dotiertem Hg(NH3)2Cl2/The Nature of the Cu2+ Centres in NH4Cl - a Spectroscopic Investigation of Cu2+ Doped Hg(NH3)2Cl2
Authors: Steffen G. , Kaschuba U. , Hitchman M. A. , Reinen D.
Published: March 2015

The preparation of Hg(NH3)2Cl2 doped with a small amount of Cu2+ is reported. The EPR and ligand field reflectance spectra indicate the presence of “CuCl4(NH3)2” polyhedra with a compressed tetragonal geometry and confirm, that the centres in Cu2+ doped NH4Cl possess the same geometry - as postulated earlier. The Cu2+ centres in Hg(NH3)2Cl2 are less compressed than those in NH4Cl, however, as could be deduced from the copper(II) hyperfine values, which are strongly influenced by the quite different admixture of the metal 4s orbital into the Alg (dz2) ground state in the two cases, and from the comparable energies of the d - d transitions.
Kohlenwasserstoffverbrückte Metallkomplexe, XXIV. Pentacarbonylrhenio-substituierte Thiophen-, Cyclohexadienyl-und Benzol-Komplexe von Mangan, Rhenium und Eisen/Hydrocarbon Bridged Complexes, XXIV. Pentacarbonylrhenio Substituted Thiophene, Cyclohexadienyl and Benzene Complexes of Manganese, Rhenium and Iron
Authors: Niemer Burkhard , Weidmann Torsten , Beck Wolfgang
Published: March 2015

The addition of pentacarbonylrhenate to [(OC)3Mn(thiophene)]+, [(OC)3M(η6-C6H4R2)]+ (M = Mn, Re; R = H, Me, Cl) yields the σ,π-hydrocarbon bridged complexes (OC)3Mn(μ-η4:η1-C4H4S)Re(CO)5 and (OC)3M(μ-η6:η1-C6H4R2)Re(CO)5, respectively. The latter complexes have also been obtained from (OC)5MFBF3 (M = Mn, Re) and C6H5Re(CO)5. The fluxional behaviour of the cyclohexadienyl bridged complexes is probably due to a 1,2-shift of the Re(CO)5 group. The reaction of [Re(CO)5]-with [(η5-C5H5)Fe(η6-p-C6H4(R)Cl)]+ (R = H, Me, Cl) proceeds with substitution of chlorine to give the heterobimetallic compounds [(η5-C5H5)Fe[μ-η6:η1-C6H4(R)]Re(CO)5]+.
The Role of Elimination Processes in the Reaction of Substituted Ureas and Thioureas with Chlorides of Mono-and Bifunctional Acids
Authors: Smith Thomas D. , Jones Peter G. , Schmutzler Reinhard
Published: March 2015

The reaction of phthaloyl chloride 2 with 1,3-dimethylurea 1 in dichloromethane at room temperature leads to the formation of N ,N -1,1'-phthaloyl-bis(1,3-dimethylurea) 3 whereas in refluxing solvent N-methyl-phthalimide 4 is the principal product. The reaction of 1,3- bis(trimethylsilyl)-1,3-dimethylurea 5 separately with phthaloyl- 2, 4-nitrobenzoyl- 6, and 5-chlorothiophene-2-carbonyl chloride 9 results in the formation of 1,3-phthaloyl-1,3-dimethylurea 7, 1,3-bis(4-nitrobenzoyl)- 1,3-dimethylurea 8, and N,N-bis(5-chlorothiophene- 2-carbonyl)-N-methylamine 12, respectively. The reaction of N,N-bis- (trimethylsilyl)acetamide 11 with 9 furnished N,N-bis(5-chlorothiophene-2-carbonyl)-acetamide 13, while the reaction of 13 with 1,3-dimethylthiourea 10 afforded 1.3-dimethyl-1,3- bis(5-chlorothiophene-2-carbonyl)thiourea 14. The structures of 3 and 12 were confirmed by low temperature X-ray crystallography. Both display crystallographic twofold symmetry.
Bicyclo[2.2.2]octane-2-spirocyclohexanes, Part 4. Birch Reduction of Spirodiisophor-6-ones
Authors: Kurzer Frederick , Kapadia Zakir
Published: March 2015

Birch reduction of spirodiisophorones by sodium in liquid ammonia - t-butanol reduces their normally inert 6-keto-group, producing the corresponding secondary alcohols, the 6-hydroxygroup of which assumes the endo- or exo-configuration. 3´-Oximinospirodiisophor-6-one is converted predominantly into the 6-endo-hydroxy-compound , from which the 3´,6-endo-ketol is obtainable by the action of sodium bisulphite. 3´-eq(and ax)-Hydroxyspirodiisophor-6-one each yield a pair of stereoisomeric 3´,6-diols, distinguished by their spectral characteristics and derivatives. Spirodiisophora-3´,6-dione yields a mixture of the same four diols, three of which are isolable in low yield. The structure of selected compounds is correlated with their assigned 13C NMR spectra.
Darstellung und spektroskopische Charakterisierung der Oxorhenate(V), [ReOI4]–und [ReO(SCF3)4]–/ Preparation and Spectroscopic C haracterization of the Oxorhenates(V), [ReOI4]–and [ReO(SCF3)4]–
Authors: Preetz W.
Published: March 2015

By ligand exchange reactions of (n-Bu4N )[ReOBr4] with NaI dissolved in acetone pure (n-Bu4N )[ReOI4], and with AgSCF3 suspended in dichloromethane (n-Bu4N )[ReO(SCF3)4] have been prepared for the first time. The vibrational spectra of both complexes are assigned according to point group C4v, supported by normal coordinate analysis based on a general valence force field. 13C and ,19F NMR spectra provide evidence for the equivalence o f the SCF3 groups.
2-Phosphinotetrazole und ihre Überführung in 1,3,4,2 λ5-Thia- und -Selenadiazaphosphol-Dimere/2-Phosphinotetrazoles and their Transformation to 1,3 ,4 ,2 λ5-Thia- and -Selenadiazaphosphole Dimers
Authors: Schmidpeter Alfred , Jochem Georg
Published: March 2015

Potassium 5-phenyl- and 5-methyltetrazolate react with chlorophosphines to give selectively the corresponding 2-phosphinotetrazoles 1. Oxidation by sulfur and selenium leads to 2-thioand 2-selenophosphinoyltetrazoles (6 , 7) which on heating loose nitrogen and yield the dimers 8 , 9 of thia- and selenadiazaphospholes. N-Phosphinoylnitrilimines are assumed to be formed as intermediates. The small 1JSeP coupling constants indicate that the selenium atoms occupy axial positions in the tbp coordination of phosphorus in 9.
Synthesis and Ligand Exchange Reaction of Some Organotin(IV) Bis(N-arylsulphonyl-N-arylhydroxylaminates)
Authors: Das Mrinal K. , Nath Matilal , De Somnath
Published: March 2015

Several diorganotin(IV)-bis(N-arylsulphonyl-N-arylhydroxylaminates) of the general formula R2Sn[ON(R1)SO2R2]2 have been synthesized and characterized by elemental analyses and by IR and 1H NMR spectra. A representative ligand exchange reaction with N-benzoyl- N-phenylhydroxylamine has been carried out.
Metallkomplexe von Farbstoffen, IV [1]. Übergangsmetallverbindungen mit den Dianionen von Epindolidion und 2.8-Dimethylepindolidion als Bis(chelat)-Liganden / Metal Complexes of Dyes, IV [1]. Transition Metal Compounds of the Dianions of Epindolidione and 2.8-Dimethylepindolidione as Bis(chelate) Ligands
Authors: Schmidt Christoph , Beck Wolfgang , Schmidt Christoph , Beck Wolfgang
Published: March 2015

The dianions of epindolidione and dimethylepindolidione act as bis(chelate) ligands (L) and form deep red polymeric complexes [L′ML]n (M = Ni(II), Co(II); L′ = DMF, PEt3). They react with chloro bridged complexes [(R3P)MCl2]2 (M = Pd, Pt) and [(η5-C5Me5)MCl2]2 (M = Rh, Ir) to give red bis-N,O-chelate complexes (R3P)(Cl)M-μ-L-M (Cl)(PR3) and (η5-C5H5)(Cl)M -μ-L-M(Cl)(η5-C5H5).
Synthese und Einkristall-Strukturanalyse des Oxidnitrits K5AgO2(NO2)2 / Synthesis and Single Crystal Structure Analysis of the Oxide Nitrite K5AgO2(NO2)2
Authors: Bremm Thomas , Jansen Martin
Published: March 2015

The title compound has been characterized by X-ray powder and single crystal diffraction: Pbam. a = 715.8(1), b = 1393.1(2), c = 539.4(1) pm; Z = 2; 1088 diffractometer data; R = 0.087, Rw = 0.083. The crystal structure is a variant of the anti-perovskite type of structure. The NO2
- anion is rotationally disordered.
Über die Reaktion von protonierter Stickstoffwasserstoffsäure mit Schwefeldichiorid und die Kristallstruktur von N(SCl)2
+SbCl6
- / On the Reaction of Protonated Hydrazoic Acid with Sulfurdichloride and the Crystal Structure of N(SCl)2
+SbCl6
-
Authors: Minkwitz Rolf , Budde Uwe , Bäck Birgit , Preut Hans
Published: March 2015

H2N3
+SbCl6
- reacts in SO2 as a solvent with SCl2 to give N(SCl)2
+SbCl6
-. The yellow salt crys­tallizes in the monoclinic space group P21/c with a = 729.7(7), b = 1122.1(8), c = 1575.6(11) pm, and β = 99.43(6)° at 169 K with 4 formula units per unit cell. The vibrational spectra are reported.
Habitual coffee intake, genetic polymorphisms, and type 2 diabetes
Authors: Lee Jae Kyung , Kim Kyunga , Ahn Younjhin , Yang Mihi , Lee Jung Eun
Published: March 2015

Background

The association between coffee intake and type 2 diabetes may be modulated by common genetic variation.

Objective

The purpose of this study was to examine the association between habitual coffee intake and the risk of type 2 diabetes and to determine whether this association varied by genetic polymorphisms related to type 2 diabetes in Korean adults.

Design and methods

A population-based cohort study over a follow-up of 4 years was conducted. A total of 4077 Korean men and women aged 40–69 years with a normal glucose level at baseline were included. Coffee intake was assessed using a validated food frequency questionnaire, and incident type 2 diabetes or prediabetes was defined by oral glucose tolerance test or fasting blood glucose test. The genomic DNA samples were genotyped with the Affymetrix Genome-Wide Human SNP Array 5.0, and nine single-nucleotide polymorphisms related to type 2 diabetes in East Asian populations were extracted.

Results

A total of 120 cases of type 2 diabetes and 1128 cases of prediabetes were identified. After adjustment for potential confounding factors, we observed an inverse association, but without any clear linear trend, between coffee intake and the combined risk of type 2 diabetes and prediabetes. We found that inverse associations between habitual coffee intake and the combined risk of type 2 diabetes and prediabetes were limited to those with the T-allele (GT/TT) of rs4402960 inIGF2BP2, those with the G-allele (GG/GC) of rs7754840 inCDKAL1, or those with CC of rs5215 inKCNJ11.

Conclusion

We found a lower risk of prediabetes and type 2 diabetes combined with coffee intake among individuals with the GT/TT ofIGF2BP2rs4402960, GG/GC ofCDKAL1rs7754840, or CC ofKCNJ11rs5215, which are known to be related to type 2 diabetes in East Asians.
Etiology of Childhood Bacteremia and Timely Antibiotics Administration in the Emergency Department
Authors: Irwin Adam D. , Drew Richard J. , Marshall Philippa , Nguyen Kha , Hoyle Emily , Macfarlane Kate A. , Wong Hoying F. , Mekonnen Ellen , Hicks Matthew , Steele Tom , Gerrard Christine , Hardiman Fiona , McNamara Paul S. , Diggle Peter J. , Carrol Enitan D.
Published: March 2015

BACKGROUND:

Bacteremia is now an uncommon presentation to the children’s emergency department (ED) but is associated with significant morbidity and mortality. Its evolving etiology may affect the ability of clinicians to initiate timely, appropriate antimicrobial therapy.

METHODS:

A retrospective time series analysis of bacteremia was conducted in the Alder Hey Children’s Hospital ED between 2001 and 2011. Data on significant comorbidities, time to empirical therapy, and antibiotic susceptibility were recorded.

RESULTS:

A total of 575 clinical episodes were identified, and Streptococcus pneumoniae (n = 109), Neisseria meningitidis (n = 96), and Staphylococcus aureus (n = 89) were commonly isolated. The rate of bacteremia was 1.42 per 1000 ED attendances (95% confidence interval: 1.31–1.53). There was an annual reduction of 10.6% (6.6%–14.5%) in vaccine-preventable infections, and an annual increase of 6.7% (1.2%–12.5%) in Gram-negative infections. The pneumococcal conjugate vaccine was associated with a 49% (32%–74%) reduction in pneumococcal bacteremia. The rate of health care–associated bacteremia increased from 0.17 to 0.43 per 1000 ED attendances (P = .002). Susceptibility to empirical antibiotics was reduced (96.3%–82.6%; P < .001). Health care–associated bacteremia was associated with an increased length of stay of 3.9 days (95% confidence interval: 2.3–5.8). Median time to antibiotics was 184 minutes (interquartile range: 63–331) and 57 (interquartile range: 27–97) minutes longer in Gram-negative bacteremia than in vaccine-preventable bacteremia.

CONCLUSIONS:

Changes in the etiology of pediatric bacteremia have implications for prompt, appropriate empirical treatment. Increasingly, pediatric bacteremia in the ED is health care associated, which increases length of inpatient stay. Prompt, effective antimicrobial administration requires new tools to improve recognition, in addition to continued etiological surveillance.
Using Quality Improvement to Reduce Continuous Pulse Oximetry Use in Children With Wheezing
Authors: Schondelmeyer Amanda C. , Simmons Jeffrey M. , Statile Angela M. , Hofacer Kelsey E. , Smith Rebecca , Prine Lori , Brady Patrick W.
Published: March 2015

BACKGROUND AND OBJECTIVES:

Clinicians commonly use continuous pulse oximetry (CPOx) for hospitalized children with respiratory illnesses. The Choosing Wisely initiative recommended discontinuing CPOx for children on room air. We used quality improvement methods to reduce time on CPOx in patients with wheezing.

METHODS:

Our project took place on 1 unit of a children’s hospital. We developed consensus-based criteria for CPOx discontinuation. Interventions included education, a checklist used during nurse handoff, and discontinuation criteria incorporated into order sets. We collected data on a second unit where we did not actively intervene to assess for secular trends and negative consequences of shorter monitoring. We followed time until medically ready, ICU transfers, hospital revisits, and medical emergency team calls on both units. We tracked the impact of interventions by using run charts and statistical process control charts.

RESULTS:

Median time per week on CPOx after meeting goals decreased from 10.7 hours to 3.1 hours on the intervention unit. Median time per week on CPOx on the control unit decreased from 11.5 hours to 6.9 hours. There was no decrease in time until medically ready on either unit. The percentage of patients needing transfer, revisit, or medical emergency team call was similar on both units.

CONCLUSIONS:

With interventions focused on clarity and awareness of CPOx discontinuation criteria, we decreased time on CPOx; however, we saw no impact on time until medically ready. We expect that other centers could use analogous methods to standardize and reduce oxygen monitoring to meet Choosing Wisely recommendations.
Prediction Models for Neonatal Health Care–Associated Sepsis: A Meta-analysis
Authors: Verstraete Evelien Hilde , Blot Koen , Mahieu Ludo , Vogelaers Dirk , Blot Stijn
Published: March 2015

BACKGROUND AND OBJECTIVES:

Blood culture is the gold standard to diagnose bloodstream infection but is usually time-consuming. Prediction models aim to facilitate early preliminary diagnosis and treatment. We systematically reviewed prediction models for health care–associated bloodstream infection (HABSI) in neonates, identified superior models, and pooled clinical predictors. Data sources: LibHub, PubMed, and Web of Science.

METHODS:

The studies included designed prediction models for laboratory-confirmed HABSI or sepsis. The target population was a consecutive series of neonates with suspicion of sepsis hospitalized for ≥48 hours. Clinical predictors had to be recorded at time of or before culturing. Methodologic quality of the studies was assessed. Data extracted included population characteristics, total suspected and laboratory-confirmed episodes and definition, clinical parameter definitions and odds ratios, and diagnostic accuracy parameters.

RESULTS:

The systematic search revealed 9 articles with 12 prediction models representing 1295 suspected and 434 laboratory-confirmed sepsis episodes. Models exhibit moderate-good methodologic quality, large pretest probability range, and insufficient diagnostic accuracy. Random effects meta-analysis showed that lethargy, pallor/mottling, total parenteral nutrition, lipid infusion, and postnatal corticosteroids were predictive for HABSI. Post hoc analysis with low-gestational-age neonates demonstrated that apnea/bradycardia, lethargy, pallor/mottling, and poor peripheral perfusion were predictive for HABSI. Limitations include clinical and statistical heterogeneity.

CONCLUSIONS:

Prediction models should be considered as guidance rather than an absolute indicator because they all have limited diagnostic accuracy. Lethargy and pallor and/or mottling for all neonates as well as apnea and/or bradycardia and poor peripheral perfusion for very low birth weight neonates are the most powerful clinical signs. However, the clinical context of the neonate should always be considered.
Off-Label Use of Inhaled Nitric Oxide After Release of NIH Consensus Statement
Authors: Ellsworth Marc A. , Harris Malinda N. , Carey William A. , Spitzer Alan R. , Clark Reese H.
Published: March 2015

BACKGROUND:

Inhaled nitric oxide (iNO) therapy is an off-label medication in infants <34 weeks’ gestational age. In 2011, the National Institutes of Health released a statement discouraging routine iNO use in premature infants. The objective of this study was to describe utilization patterns of iNO in American NICUs in the years surrounding the release of the National Institutes of Health statement. We hypothesized that iNO prescription rates in premature infants have remained unchanged since 2011.

METHODS:

The Pediatrix Medical Group Clinical Data Warehouse was queried for the years 2009–2013 to describe first exposure iNO use among all admitted neonates stratified by gestational age.

RESULTS:

Between 2009 and 2013, the rate of iNO utilization in 23- to 29-week neonates increased from 5.03% to 6.19%, a relative increase of 23% (confidence interval: 8%–40%; P = .003). Of all neonates who received iNO therapy in 2013, nearly half were <34 weeks’ gestation, with these infants accounting for more than half of all first exposure iNO days each year of the study period.

CONCLUSIONS:

The rates of off-label iNO use in preterm infants continue to rise despite evidence revealing no clear benefit in this population. This pattern of iNO prescription is not benign and comes with economic consequences.
Una experiencia docente en los estudios de Administración y Dirección de Empresas: análisis empírico con estudiantes de Finanzas
Authors: Bachiller Patricia , Bachiller Alfredo
Published: March 2015

La construcción del Espacio Europeo de Educación Superior afecta tanto a aspectos curriculares y de planificación docente, como a temas relacionados con las condiciones de aprendizaje y formación de cada centro y cada universidad, así como a las diferentes culturas universitarias establecidas. Nos encontramos ante un cambio profundo y complejo que requiere nuevos planteamientos de la práctica de la enseñanza. El caso que a continuación se detalla consiste en la implantación de una experiencia docente innovadora en el área de las Finanzas, con el fin de mejorar el proceso de aprendizaje de los estudiantes. Se ha llevado a cabo en alumnos del último curso de Administración y Dirección de Empresas en la asignatura de Bolsa y Gestión de Carteras de la Universidad de Zaragoza (España). El objetivo general de este artículo de investigación es evaluar si la innovación docente (práctica) ayuda a afianzar los conocimientos adquiridos en clases de teoría (magistrales) gracias a un aprendizaje de simulación del caso y basado en el uso de las tecnologías de la información y la comunicación (TIC). Además, en esta práctica se pretende desarrollar habilidades sociales, ya que los alumnos deben ser capaces de trabajar en grupo y tomar decisiones consensuadas. Los resultados muestran que la innovación docente ha contribuido en el aprendizaje de los alumnos, mejorando su autonomía y adquisición de habilidades directamente relacionadas con la profesión financiera, a la vez que desarrollan la capacidad de trabajar en grupo.
A global-local approach to the design of dynamic vibration absorber for damped inverted pendulum structures
Authors: Anh N. D. , Nguyen N. X.
Published: March 2015

In practice, an inverted pendulum can be used to model many real structures as the arms of robots, soil structures, or fluid structures. However, the study on the design of dynamic vibration absorber for inverted pendulum structures is very limited in the literature. To the best knowledge of the authors, however, there has been no study on the dynamic vibration absorber when the primary inverted pendulum structure is damped. This paper deals with the optimization problem of dynamic vibration absorber for inverted pendulum structures. Two novel findings of the present study are summarized as follows. First, the optimal parameters of dynamic vibration absorber for undamped inverted pendulum structures are given by using \(H_{\infty }\) optimization. Second, the authors suggest a so-called global-local approach to determine approximate expressions for optimal parameters of a pendulum type absorber attached to a damped inverted pendulum structure. Finally, a numerical simulation is done for an example of the articulated tower in the ocean to validate the effectiveness of the results obtained in this work.
Ousadia e redenção: o Instituto de Pesquisa Histórica de José Honório Rodrigues
Authors: Freixo Andre De Lemos
Published: March 2015

Este artigo analisa um “futuro pretérito”: o Instituto de Pesquisa Histórica (IPH), idealizado por José Honório Rodrigues entre meados da década de 1940 e inícios de 1950. Trata-se de um horizonte não concretizado. Em meio às tensões que marcaram o processo de constituição de uma historiografia profissionalizada no país, o IPH visava inaugurar uma nova fase da história no Brasil. Esse lugar social e institucional centralizaria quase todas as etapas da produção de conhecimento histórico, concorrendo, inclusive, com as Faculdades de Filosofia no que toca à pesquisa e formação de historiadores. Avalio aqui sua proposta bem como o que estaria em jogo para seu idealizador no momento em que formulou seu projeto.
Memórias de um profissional de história
Authors: Ribeiro Júnior José
Published: March 2015

Dentro do quadro de proposições deste número da revista História da Historiografia, relata-se, de forma concisa, a trajetória de um professor universitário de história. Trata-se de alguém que narra sua licenciatura na USP, sua participação em inícios de cursos de graduação e pós-graduação numa cidade do interior do Estado de São Paulo, inclusive fazendo parte dos primórdios da Universidade Estadual Paulista (UNESP). O autor aborda, também, aspectos de sua vida acadêmica e institucional, relatando, ainda, o processo de sua inserção em linha historiográfica definida. Observe-se, introdutoriamente, que o leitor nem sempre encontrará uma ordem cronológica linear, por força da multifacetada natureza das atividades de um professor universitário de história. Advirto, também, não terem sido feitas as citações bibliográficas completas por entender que escrevo para especialistas do métier de l’historien.
História e memória: origens e desenvolvimento do programa de pós-graduação em História da Universidade Federal Fluminense
Authors: Falcon Francisco
Published: March 2015

A convite da revista História da Historiografia, Francisco José Calazans Falcon elaborou esta narrativa sobre o desenvolvimento do programa de pós-graduação em história da Universidade Federal Fluminense (UFF). Conjugando história e memória, este exercício de contextualização foi desenvolvido por um profissional que colaborou na criação de diversos programas de pós-graduação no Rio de Janeiro, uma parte significativa do processo de construção da pós-graduação em história no Brasil.
Combates na história atlântica: a historiografia de Joseph E. Inikori
Authors: Lopes Gustavo Acioli
Published: March 2015

O presente artigo aborda a historiografia do nigeriano Joseph E. Inikori, destacando sua análise de três temas clássicos da história atlântica moderna: o aspecto quantitativo do tráfico transatlântico de escravos, o impacto do tráfico de escravos na África e a relação entre o capitalismo e a escravidão moderna. Apresentam-se os seus argumentos em contraposição a outras abordagens que aqui denominamos “revisionistas”, de forma a ressaltar os principais pontos de discordância que têm marcado os debates no campo referido e a posição de Inikori nele. Argumenta-se, enfim, que suas análises constituem uma tese mais ampla sobre a formação do mundo atlântico desde o séc. XVI até o advento da Revolução Industrial.
El fin de la historia en Hegel y Marx
Authors: Barros Israel Sanmartín
Published: March 2015

En este trabajo nos centraremos en las construcciones teóricas de Hegel y Marx alrededor de la idea de “fin de la historia” y también en la opinión que han suscitado en los diferentes autores sus ideas finalistas. Jugaremos, así, con las ideas de fin en Hegel y Marx, pero también con las de toda una serie de estudiosos que han polemizado sobre el tema en los últimos años. Partiendo de esas premisas teóricas, el objetivo fundamental de esta investigación es mostrar qué fines de la historia presentan Hegel y Marx y cómo se imbrican el uno en el otro. La idea es mostrar la tradición teórica del término y su genealogía en esos dos autores. Para ello recurriremos a una matriz de análisis descriptiva a fin de localizar cómo y dónde expresan los dos autores la idea de fin de la historia. Tras presentar sus ideas, buscaremos similitudes y diferencias en la arquitectura histórica y teórica de los conceptos de fin de la historia, todo ello partiendo de la idea de que Hegel es el iniciador de dicho concepto y Marx, su continuador. Analizaremos dichas ideas desde una perspectiva teórica.
Historiografia, memória e ensino de história: percursos de uma reflexão
Authors: Oliveira Maria da Glória de
Published: March 2015

Em um de seus últimos trabalhos, Manoel Luiz Salgado Guimarães abordou as tensões e os paradoxos das relações entre a escrita e o ensino da história, entendendo ambas as operações como marcas distintivas de duas dimensões indissociáveis, da construção do conhecimento histórico e do próprio ofício do historiador. No presente artigo, proponho um retorno a textos por ele publicados a partir do final dos anos 1990, através dos quais apontarei alguns dos problemas teóricos que perpassaram as suas reflexões em torno da história escrita e da história ensinada como formas de configuração de sentido e de usos do passado. O objetivo é situar as proposições de Manoel Salgado acerca do ensino da história nos desdobramentos de suas proposições teóricas sobre a historiografia.
Indagações sobre um método acima de qualquer suspeita
Authors: Murari Pires Francisco
Published: March 2015

Este ensaio coloca algumas indagações questionando a inconsistência da trama argumentativa porque Carlo Ginzburg concebeu os fundamentos de sua proposição do paradigma indiciário. Um primeiro movimento reflexivo dessa interpelação questionadora intriga a exploração de algumas considerações porque o espectro da bibliografia crítica avaliou a tese de Ginzburg. Consequente a ele, desdobra-se o segundo movimento porque a reflexão crítica toma por foco o eventual diálogo da proposição epistemológica de Ginzburg com o congênere conceito, originalmente tucidideano, de indiciamento (tekmérion) como procedimento metodológico de veracidade factual, diálogo este, senão totalmente silenciado, efetivamente elidido pela (des)consideração com que Ginzburg o irreleva.