bluuebunny/crossref_metadata_2025_split huggingface dataset:
Strahlenbedingte Frühveränderungen an Zellkern-Proteinen
Authors: Ernst Hanna 
Published: March 2015

Aus rohrzucker-isolierten Leber-Zellkernen ganzkörperbestrahlter Ratten (1000 r) wurden die nucleare Globulin-Albumin- und die Histon-Fraktion extrahiert und deren Stickstoff- und Nucleinsäuregehalte analysiert. Die Ergebnisse konnten durch Parallelversuche mit Rattenleber-„Behrens“-Kernen und Mäuseleber-Sucrose-Kernen bestätigt werden.
Auch in der Leber wurde — wie vorher in Milz und Thymus — eine unmittelbar nach dem Insult einsetzende Nucleoprotein-Verminderung in beiden Fraktionen festgestellt. Die in vivo Strahlenschädigung des DNS-Histon-Komplexes führt in der Leber zum zeitweisen Abbau von großen Mengen Histon, ohne daß sich Konzentrations-Veränderungen der DNS ergeben.
Aus den analysierten Größen: Organgewicht, Zellzahl, DNS-Gehalt und Nucleoprotein-Stickstoff lassen sich die strahleninduzierten Veränderungen im Gewebe, deren Schadensbild histologisch gut bekannt ist, chemisch nachweisen und für die untersuchte Zeitspanne in zwei Perioden unterteilen: Frühveränderungen und, durch eine kurze Erholungsphase davon getrennt, weitgehender aber langsamer Nucleoproteinabbau, der nur im parenchymatischen Zellkern reversibel ist. Im lymphatischen Kern führt der gleichzeitige Verlust von Nucleoprotein und DNS zum Kernuntergang.
Im strahleninduzierten Histonverlust in Milz und Thymus sehen wir ein frühes Glied der Wirkungskette, die zum Abbau des DNS-Nucleoprotein-Komplexes im bestrahlten Lymphocyten führt.
Der Einfluß glykolytischer Fermente auf den Stoffwechsel von Tumorzellen
Authors: Heise E. , Görlich M. 
Published: March 2015

Durch einen aus Rinderleber angereicherten FDPasehaltigen Extrakt kann in Kombination mit DPN die Glykolyse von Ascites-Tumorzellen stärker herabgesetzt werden als mit FDPase allein. Atmung und aerobe Glykolyse werden durch DPN nicht weiter beeinflußt. Durch DPNH wird die anaerobe Glykolyse vermindert, ein FDPase-Zusatz steigert diese Hemmwirkung nicht weiter.
Durch spektrophotometrische Untersuchungen konnte festgestellt werden, daß Leberextrakte DPN nicht hydrieren und FDPase-Lösungen nur wenig DPNH enthalten. Die Glykolysehemmung ist der FDPase-Aktivität und nicht dem DPNH-Gehalt proportional.
Strahlenchemische Cyclodimerisation von 1.3-CycIlohexadien und neuartige Bildungsweisen von Diels-Alder-Addukten
Authors: Schenck G. O. , Mannsfeld S.-P. , Schomburg G. , Krauch C. H. 
Published: March 2015

Die strahlenchemische Cyclodimerisation von 1.3-Dienen kann zu syn- und anti-C4-Cycloaddukten vom Diels-Alder- Typ führen. Das bisher unbekannte exo - Diels-Alder- Dimere (V) des 1.3-Cyclohexadiens (I) ließ sich durch γ-Bestrahlung von I in Benzol und durch Belichtung in sensibilisierten und unsensibilisierten Photoreaktionen erhalten. Das gleiche Produkt V erhielten wir durch thermische Cyclodimerisation von I sowie durch Ringisomerisation von III.
Diels-Alder- Addukte können strahlenchemisch durch verschiedene chemische Relaismechanismen gebildet werden, die die Teilnahme von jeweils mindestens drei Molekeln erfordern. Für die rein thermische unkatalysierte Diels-Alder- Dimerisation von I müssen wir entsprechende mindestens trimolekulare Substratrelais-Mechanismen diskutieren.
Two Modifications of Tetraethylammonium tranis-Diiodobis(ethanedialdioximato)cobaltate(III) with and without Intermolecular I···I Interactions
Authors: Mégnamisi-Bélombé Michel , Endres Helmut 
Published: March 2015

Abstract
The structures of two modifications of [C8H20N][C4H6Col2N4O4], Mr = 617.11, have been determined by X-rav investigations. Form 1 is orthorhombic, Pben, a = 8.417(2), b - 12.923(3), c = 18.444(3) Å, V = 2006 Å3 , Z = 4, dc = 2.04 g cm-3 , final Rw = 0.037 for 1989 reflections and 124 parameters. There are no unusual intermolecular interactions in this modification. From 2 is tetragonal, I41md, a = 8.886(3), c = 25.841(6) Å, V = 2040 Å3 , Z = 4, dc = 2.01 g cm-3 , final Rw = 0.027 for 1629 reflections and 80 parameters. In this modification the metal complexes form strictly linear chains via short intermolecular I ··· I contacts, 3.722(1) Å.
Phosphinsubstituierte Chelatliganden, XXIII [1] Darstellung und NMR-Spektren von Alkyl-arylphosphinothioformamiden, R(Ph)PC(S)NHMe / Phosphine-Substituted Chelate Ligands, XXIII [1] Synthesis and NMR Spectra of Alkyl-arylphosphinothioformamides, R(Ph)PC(S)NHMe
Authors: Kunze Udo , Tittmann Rolf 
Published: March 2015

Abstract
A series of alkyl-arylsubstituted N-methyl phosphinothioformamides, R(Ph)PC(S)NHMe (2 a-g), with varying bulkiness of the alkyl rest was synthesized from the racemic secondary phosphines 1a-g and methyl isothiocyanate. 1H and 13C NMR spectra of 2a−g reveal signal sets of diastereotopic nuclei due to the asymmetry of the molecule. The chemical shift and coupling constants were confirmed by simulation in case of 2b, c. The vicinal 31P−13C couplings of the menthyl and neomenthyl compounds 2f, g show an "anti-Karplus" behaviour (3J(gauche) > 3J(trans)) and allow the conformational assignment of the alicyclic group. The 31P chemical shifts of 2a−d give a linear correlation with the cone angle of the alkyl substituents quoted from literature.
Nb-Methyl Strictamine — A New Alkaloid from the Leaves of Rhazya stricta
Authors: Rahman Atta-ur- , Khanum Sajida , Badar Yasmin , Fatima Kaneez , Ahmad Yusuf 
Published: March 2015

Abstract
Continuing studies on the leaves of Rhazya stricta have resulted in the isolation of a new Picralima alkaloid, Nb -methyl strictamine 2.
Ein [1,3,4]Thiazaphospholidin, Darstellung und NMR-Daten / A [1,3,4]Thiazaphospholidine, Preparation and NMR Data
Authors: Heckmann Gernot , Fluck Ekkehard , Kuhm Peter 
Published: March 2015

Abstract
Preparation and properties of a [1,3,4]thiazaphospholidine are described. The 31P. 13C and 1H NMR spectra in double and triple resonance mode are recorded and discussed in detail.
Tritelluride mit komplexierten Kationen: Darstellung und Kristallstruktur von [Ba(en)3]Te3 und [Ba(en)4,5]Te3/ Tritellurides of Complex Cations: Synthesis and Crystal Structure of [Ba(en)3]Te3 and [Ba(en)4,5]Te3
Authors: Zagler Roland , Eisenmann Brigitte , Schäfer Herbert 
Published: March 2015

Abstract
The two title compounds have been prepared by reaction of appropriate mixtures of the elements in ethylenediamine. The structures have been determined on the basis of single crystal data. [Ba(en)3]Te3 crystallizes in the monoclinic system, space group P21/c with a = 918.0(4), b = 1203.7(6), c = 1639.9(6) pm, β = 93.4(1)°. In the structure there are bent tritelluride anions Te3
2- (bond lengths 273.9-278.5 pm, bond angle 105.7°). The Ba2+ cations are six coordinate by the bidentate ligand ethylenediamine. [Ba(en)4,5]Te3 crystallizes in the monoclinic system, space group Cc with a = 1752.8(6), b = 938.9(4), c = 3041.7(8) pm, β = 91.3(1)°. In this structure the bond lengths in the Te3
2- anions are shorter (272.1-273.1 pm, bond angles 110.9-112.2°). The cations are coordinated by four bidentate ligands, and are connected into pairs by a further ethylenediamine molecule. The resulting dinuclear [Ba(en)4]en[Ba(en)4]4+ units have the Ba2+ cations in CN 9.
Selbststapelnde Systeme, IV 2,3,7,8-Tetramethoxythianthreniumsalze/Selfstacking Systems, Part IV 2.3.7.8-Tetramethoxythianthrenium Salts
Authors: Hinrichs Winfried , Berges Peer , Klar Günter 
Published: March 2015

Abstract
By addition of solutions of nitrosyl hexachloroantimonate(V) in acetonitrile or of diiodine in n-hexane to a solution of 2.3.7.8-tetramethoxythianthrene (“Vn2S2”, 1) in toluene the oxidation products [Vn2S2][SbCl6] • CH3CN (2) and [Vn2S2]I3 (3), resp., are formed. Crystal structure determinations show both compounds to contain the [Vn2S2]+ ion. In contrast to the folded parent compound Vn2S2 its monocation [Vn2S2] T is planar, the short CS and CO distances (172-173 pm and 134-135 pm resp.) indicate an extended mesomeric system. Both compounds crystallize with segregated stacks of cations and anions. In 2 the coplanarly and equidistantly stacked [Vn2S2]+ ions have an A,B-sequence (distance between the planes of the ions 353 pm, intermolecular S···S distance 366 pm). In 3 the [Vn2S2]+ ions form dimers by SS contacts (S···S distance 316 pm); these dimers are arranged in a stair-like manner (distances between atoms of adjacent dimers 350-380 pm). The conductivities of 2 and 3 are 9.4 • 10-9 and 5.3 • 10-6 Sem-1 , resp.
Stereochemistry of Substituted Isomeric 3-Oxa-7-aza-bicyclo[3.3.1]nonan-9-ones
Authors: Küppers Horst , Hesse Karl-F. , Ashauer-Holzgrabe Ulrike , Haller Rolf , Boese Roland 
Published: March 2015

Abstract
Two isomers of 7-methyl-9-oxo-2,4-diphenyl-3-oxa-7-aza-bicyclo[3.3.1]nonan-1,5-ethyl dicarboxylate (1a and 1b) were obtained by condensation of 2,6-diphenyl-1-oxa-4-oxo-cyclohexan-3,5-ethyl dicarboxylate with methylamine and formaldehyde. Their crystal structures were determined by X-ray diffraction. They crystallize in the triclinic space group P1̄ with (for 1a) a = 12.907(5), b = 11.223(4), c = 8.993(4) Å, α = 105.82(4), β = 100.14(5), γ = 97.35(4)°, and (for 1b) a = 16.400(7), b = 13.062(4), c = 11.336(2) Å, α = 94.19(3), β = 94.74(3), γ = 102.56(4)°. This investigation has shown that isomer 1a has the boat-chair conformation, and isomer 1b has the chair-chair conformation. The formation of la causes a configurational change of the phenyl substituents. The two species are characterized by NMR spectroscopy. - Another comparable bicyclononanone with a bulky substituent at the nitrogen atom has been synthesized and was investigated spectroscopically. This compound should have chair-boat conformation (with the boat conformation in the N-heterocyclic ring) whereas 1a has the boat conformation in the O-heterocyclic ring.
X-Ray Crystal Structure Analysis of Deacetyldehydroeuphorianin: The Correct Structure of the Novel Pentacyclic Macrocyclic Diterpene, Euphorianin
Authors: Okogun Joseph I. , Fakunle Christopher O. , Ekong Donald E. U. , Lindner Hans J. , Habermehl Gerhard G. 
Published: March 2015

Abstract
The conversion of euphorianin to deacetyldehydroeuphorianin which was used in an X-ray crystal structure analysis is described. A new pentacyclic structure related to ingol tetraacetate is described for euphorianin.
Darstellung und Kristallstrukturen von LiGaCl4 und LiGaI4/ Preparation and Crystal Structure of LiGaCL4 and LiGaI4
Authors: Hönle Wolfgang , Hettich Bernhard , Simon Arndt 
Published: March 2015

Abstract
The crystal structures of LiGaCl4 and LiGaI4 have been determined by single crystal X-ray methods. Both compounds are isotypic with LiAlCl4 and characterized by LiX6 octahedra and GaX4 tetrahedra. Mean bond lengths are: d̄(Ga-X) = 217.4 pm (Cl) and 255.9 pm (I); d̄(Li-X) = 263.9 pm (Cl) and 305.3 pm (I), respectively. Common features of the isotypic compounds LiGaX4 (X = Cl, Br. I) are discussed.
Darstellung und Schwingungsspektren von Chloro-Bromo-Ruthenaten(IV) einschließlich der Stereoisomeren / Preparation and Vibrational Spectra of Chloro-Bromo-Ruthenates(IV) Including Stereoisomers
Authors: Preetz W. , Allwörden H. N. v. 
Published: March 2015

Abstract
The mixed chloro-bromo complexes [RuClnBr6-n]2-, n = 1-5, have been separated for the first time by ion exchange chromatography on diethylaminoethylcellulose. Due to the stronger trans-effect of Br compared with Cl, on treatment of [RuBr6]2- with Cl- in the presence of Br2 nearly pure cis/fac-isomers,and by reaction of [RuCl6]2- withBr-/Br2 nearly purer tranS/mer-isomersforn = 2,3,4 are formed. The vibrational spectra of the mixed ligand complexes are completely assigned according to point groups D4h, C4v, C3v and C2v, respectively. The bands are observed in the characteristic regions: ν(RuCl): 340-270 > ν(RuBr): 245-190 > δ(ClRuCl) ≥ δ(ClRubr) ≥ δ(BrRuBr): 125-90 > νʟ: < 100 cm-1. The lower stability of the hexahalogeno complexes of Ru(IV), 4d, compared with the homologous complexes of Os(IV), 5d, is confirmed by a decrease of the force field constants by approximately 15%.
Ein- und zweikernige Bis(2,2′-bipyridyl)ruthenium-Komplexe mit N,O-Modelliganden für Dehydrogenase-Cofaktoren / Mono- and Binuclear Bis(2,2′-bipyridine)ruthenium Complexes with N,O-Ligands Modelling Dehydrogenase Cofactors
Authors: Ernst Sylvia , Kasack Volker , Bessenbacher Christian , Kaim Wolfgang 
Published: March 2015

Abstract
Coordination of substitutionally inert [Ru(bpy)2]2+ fragments (bpy: 2,2′-bipyridine) to the a-iminoketone chelate ligands pyrazine-2-dimethylcarboxamide (4) and 4,7-phenanthroline-5,6-dione (5) yields the complexes [(N,O-4)Ru(bpy)2]2⊕, [(O,O′-5⊖)Ru(bpy)2]⊕ and {(N,O; N′,O′-5)[Ru(bpy)2]2}4⊕ which exhibit a rich electrochemistry. The distinctly different electronic structures of the complexes are evident from the ESR behaviour of paramagnetic intermediates: N.O-coordinated complexes have the unpaired electron residing in the ligand n system upon reduction, albeit with g<2 for the binuclear complex of 5. The paramagnetic O,O′-coordinated mononuclear complex with 5 has its redox potentials shifted positively relative to that of the binuclear system. These results are particularly noteworthy because 4 and 5 can be regarded as model compounds for the flavin and methoxatin dehydrogenase cofactors.
Darstellung und Kristallstruktur des Bis((–)-strychninium)hexasulfids, (C21H23N2O2)2S6 / Synthesis and Crystal Structure of Bis((–)-strychninium)hexasulfide, (C21H23N2O2)2S6
Authors: Böttcher Peter , Buchkremer-Hermanns Heinz 
Published: March 2015

Abstract
Bis((-)-strychninium)hexasulfide has been synthesized from (-)-strychnine and (NH4)2S5 in ethanolic solution at 0 °C. It is monoclinic, S. G. C2, with a = 34.21(1) Å, b = 7.59(2) Å, c = 7.74(1) Å, β = 103.0(1)°. As expected, the S6
2--anions occur as unbranched zig-zag-chains. Surprisingly, they do not show the common helical all-trans-conformation but the all-cis-conformation. The cations and the anions are linked by hydrogen bridges, running from the terminal sulfur atoms of the polysulfide dianions to the protonated nitrogen atoms of the monoprotonated (-)-strychnine molecules.
Darstellung, Kristallstruktur und Eigenschaften von β-Ga2Br4 / Preparation, Crystal Structure and Properties of β-Ga2Br4
Authors: Hönle Wolfgang , Simon Arndt , Gerlach Gabriele 
Published: March 2015

The compounds Ga2Br4 (α+β) have been prepared by reacting GaBr3 with Ga metal without a solvent or in a hydrocarbon medium. α-Ga2Br4 is isotypic with Ga2Cl4, and β-Ga2Br4 with Ga2I4. Both forms have to be formulated as Ga+(GaBr4)- according to their crystal structures. The first order phase transition α→β has been investigated by means of DTA and temperature dependent X-ray powder photographs.
The crystal structure of β-Ga2Br4 has been refined with single crystal data (R3c; a = 2163.4(8) pm; c = 869.2(4) pm; Z = 18; R = 0.037). Main building units are GaBr4
- tetrahedra (d̄(Ga -Br) = 232.9 pm), connected in three dimensions by capped trigonal prisms (6+2+1) around Ga+. The crystal chemical relationships between β-Ga2Br4 and Ga2I4 are discussed.
Reaktion von Oxomolybdän-Komplexen mit Alkyldithiocarbazaten. Darstellung und Charakterisierung von Hydrazido- und Diazenido-Komplexen des Molybdäns / Reaction of Oxomolybdenum Complexes with Alkyldithiocarbazates. Synthesis and Characterization of Hydrazido- and Diazenido Complexes of Molybdenum
Authors: Mattes Rainer , Scholand Heinz , Mikloweit Ulrich , Schrenk Volker 
Published: March 2015

(2).
The reaction of alkyldithiocarbazates NH2NHC(S)SR′ with MoO2(S2CNR2)2 R, R′ = Me, Et) yields the diazenido hydrazido complexes Mo(NNC(S)SR′)(NH2NC(S)SR′)(S2CNR2)2 (1), reaction with the molybdenum hydroxylamidate complex MoO2(ONMe2)2 gives the diazenidobis( hydrazido) complex Mo(NNC(S)SMe)(NH2NC(S)SMe)2(Me2NO)-CH3OH The crystal structures of 1 a (R = Me, R′ = Et) and 2 have been determined. The metal atoms in 1 a and 2 are seven coordinated and have MoN2S5 and MoN3O2S2 ligand arrays, respectively. Both compounds contain the approximately linear diazenido ligand NNC(S)SR in addition to one (1a) or two (2) N,S-chelating hydrazido(1-) ligands NH2NC(S)SR. When 1a is treated with HCl, the dimeric complex (Me2NCS2)(O)Mo(μ-NNC(S)SEt)2 Mo(S2CNMe2) (4) is obtained. X-ray crystallography showed 4 to be an asymmetric dinuclear complex, with a Mo-Mo distance of 267.2(1) pm. One Mo site has a square pyramidal MoOS2N2 geometry, while the other one has an approximately trigonal prismatic MoN2S4 geometry. The mean N-N distance in 4 is 135(1) pm. The reaction of NH2NHC(S)SMe with MoO2(acac)2 yields Mo(Me2CNNC(S)SMe)(NNC(S)SMe)(MeSC(S)NNC(S)SMe) (3). Its structure has been determined by X-ray crystallography. 3 contains a unique combination of three different N- and S-chelating ligands: the Schiff base Me2C=NNC(S)SMe, the highly bent bidentate diazenido ligand NNC(S)SMe (∡ Mo-N-N = 142.1(5)°), and the novel planar tridentate ligand MeSC(S)NNC(S)SMe. The latter can be taken as neutral diacyldiazene or, more likely, as the dianion of the as yet unknown MeSC(S)NH -NHC(S)SMe. The N - N distance in this ligand is 136.1(9) pm.
Reaktion von DioxomoIybdän(VI)-Komplexen mit O-Methyl-thiocarbazat Darstellung und Charakterisierung von Schiffbase-, Hydrazido- und Diazenido-Komplexen des Molybdäns / Reaction of Dioxomolybdenum(VI) Complexes with O-Methylthiocarbazate Synthesis and Characterization of Schiffbase, Hydrazido and Diazenido Complexes of Molybdenum
Authors: Mattes Rainer , Scholand Heinz , Mikloweit Ulrich , Schrenk Volker 
Published: March 2015

trans
The reaction of NH2NHC(S)OR, (R = Me, Et) with MoO2(acac)2 yields the dimeric complexes MO2O3(MeC(O)CHC(Me)NNC(S)0R)2 (1) with the planar O = Mo - O - Mo = O group. The tetradentate O,N,S-donor ligand is formed through condensation of acetylacetone with the organohydrazine. The reactions of NH2NHC(S)OMe with MoO2(S2CNEt2)2 and MoO2(ONEt2)2 give the diazenido hydrazido complexes Mo(NNC(S)OMe)(NH2NC(S)OMe)(S2CNEt2)2·CH2Cl2
(2) and Mo(NNC(S)OMe)(NH2NC(S)OMe)2(ONEt2) (4). The metal atoms in both compounds are seven coordinated and contain the approximately linear diazenido ligand NNC(S)OMe and one (2) or two (4) N,S-chelating hydrazido(1-) ligands NH2NC(S)OMe. 2 has crystallographically imposed mirror symmetry. Recrystallization of 2 from toluene in air gives the asymmetric dinuclear complex (Et2NCS2)(O)Mo(μ-NNC(S)OMe)2Mo(S2CNMe2) (3). The Mo-Mo distance is 267.0(2) pm. One Mo site has square pyramidal MoOS2N2 geometry, the other trigonal prismatic MoN2S4 geometry. The coordination of the bridging N atoms is slightly pyramidal. The compounds 1, 2 and 3 have been further characterized by vibrational spectroscopy.
Synthesis and Photoelectron Spectroscopy of Spin Labeled Metal Complexes
Authors: Shen Dekang , Zhu Lizhi , Zhao Liangzhong 
Published: March 2015

(4)
Two new spin labeled metal complexes; cobalt(II) bis(2,2,6,6-tetramethyl-1-oxyl-4-piperidyl p-salicylaldiminobenzoate) (3), copper(II) bis(2,2,6,6-tetramethyl-1-oxyl-4-piperidyl-p-salicylaldiminobenzoate) were prepared. The synthesis of amino derivatives of nitroxide compounds were improved by a simplified synthetic route. The XPS spectra of 3 and 4 were determined. The observed N Is, Cu 2p and Co 2p spectra of spin labeled metal complex are discussed.
Synthesis of Some New 2-Imino-2,3-dihydro-1,3,4-thiadiazole and Selenadiazole Derivatives
Authors: Abdelhamid Abdou Osman , Shawali A. S. 
Published: March 2015

(2)
Diazotized 3(5)amino-5(3)-phenylpyrazole reacts with phenacylthiocyanate (1) and phenacylselenocyanate (10) to give the corresponding 1,3,4-thiadiazoline derivative (5) and 1,3,4- selenadiazoline derivative (12), respectively. A mechanism is proposed and it is substantiated by an alternate synthesis of 5 and 12 from the corresponding hydrazidoyl bromide (6) with potassium thiocyanate and potassium selenocyanate, respectively. The thiadiazoline (5) and selenadiazoline (12) give the respective N-acyl derivatives (7a) and (12) with acetic anhydride. Nitrosation of 5 and 12 gives the corresponding N-nitroso-derivatives (8a) and (14), respectively. Cyclization of 6 gives the corresponding 9 with triethylamine in benzene.
Darstellung und Kristallstrukturen von Ca4In2N und Sr4In2N
Authors: Cordier Gerhard , Rönninger Stephan 
Published: March 2015

Abstract
The new compounds Ca4In2N and Sr4In2N crystallize in the tetragonal system (space group I41/amd, No. 141). In and Ca together form a rocksalt structure. All octahedral holes, which are built by Ca only, are occupied by nitrogen. The In atoms form In-In zig-zag-chains; the In-In bond lengths are 316.4 pm (Ca compound) and 332.0 pm (Sr compound), resp.
Schwermetall-π-Komplexe II [1] Arenkomplexe des Quecksilbers(I)
Authors: Frank W. , Dincher B. 
Published: March 2015

Abstract
The crystalline compounds [(CH3C6H5)2Hg,][AlCl4]2 (1), [(1,2-(CH3)2C6H4)2Hg2][AlCl4]2(2), [(1,3,5-(CH3)3C6H3)2Hg2][AlCl4]2 (3), [1,2,4,5-(CH3)4C6H2Hg2][AlCl4]2 (4) and [((CH3)6C6)2Hg2][AlCl4]2-CH3C6H5 (5) have been prepared from mercury(I)chloride, aluminium trichloride and the corresponding arenes and characterized by elem ental analysis. The crystal structure of 5 has been determ ined from single crystal X-ray diffraction data and refined to R - 0.093 for 3269 unique reflections. Crystal data: monoclinic, space group P21/c, a = 2116(1), b = 1095.1(7), c = 1880(1) pm, β - 104,9(1)°, Z = 4. Each atom of a central Hg2 unit (Hg -Hg distance 251.5 pm) is asymmetrically complexed by hexamethylbenzene, the Hg - Carene distances being in the range from 241 to 340 pm. Two distorted AlCl4 tetrahedra complete a “molecular” [arene2Hg2][AlCl4]2 unit. The shortest Hg-Cl distances are 310 and 312 pm, respectively.
The Vibrational Spectra of NH4VO3 at Elevated Temperatures and Pressures
Authors: Heyns A . M. , Venter M. W. , Range K.-J. 
Published: March 2015

Abstract
Results obtained from the vibrational spectra of NH4VO3 and its deuterated analogues show that at least two types of hydrogen bond interactions can be identified at am bient conditions. In accordance with the structural data on NH4VO3 (F. C. Hawthorne and C. Calvo, J. Solid State Chem. 22, 157 (1977)) these interactions are assigned to normal, strong hydrogen bonds and weaker bifurcated ones, respectively. The temperature dependence of some of the N -H bands indicates that the normal hydrogen bonds decrease in strength with increasing temperatures, while the bifurcated ones tend to increase in strength. The NH4
+ ions do not show fluxional behaviour at ambient conditions and even the bifurcated hydrogen bonds are of the type that is dominated by acceptor strength of the anions and not by a volume effect. The Ram an active NH4
+ vibrations are very weak compared to the V - O modes and could not all be observed in the highpressure diamond anvil cell. The temperature dependence of the V - O Ram an active modes suggests that changes in the crystals of NH4VO3 brought about by the application of heat mainly involve the O -V -O angles, while pressure changes are mostly accommodated by changes in the V -O bridging bonds and O -V -O bridging angles.
Computerunterstützte mechanistische Analyse der Streith-Reaktion mit dem Programm RAIN
Authors: Fontain Eric , Bauer Johannes , Ugi Ivar 
Published: March 2015

Abstract
An improved version of the computer program RAIN (for bilaterally generating Reaction And Intermediate Networks from educts and products; FORTRAN 77, MS-DOS) is presented. Its application is illustrated by the elaboration of a network of mechanistic pathways for the Streith reaction.
Studies on Wasp Venom, II A New Mast Cell Degranulating Peptide from the Wasp Paravespula vulgaris
Authors: Schulze Uwe , Schrader Klaus-Dieter , Chen Robert , Grotjahn Lutz , König Wilfried A. 
Published: March 2015

Abstract
From the extract of 3991 venom glands of the most common European wasp species Paravespula
vulgaris a novel basic pentadecapeptide was isolated and investigated by amino acid analysis, micro-Edman-degradation and fast atom bombardment mass spectrometry. The peptide has the sequence H-Ile-Asn-Trp-Lys-Lys-Ile-Lys-Ser-Ile -lle -Lys-Ala-Ala-Met-Asn and exhibits strong mast cell degranulating activity similarly to the mastoparans isolated from various wasp species.