bluuebunny/crossref_metadata_2025_split huggingface dataset:
Präparative organische Chemie unter Verwendung einfach herzustellender Katalysatoren / A Simple Method for Preparation of Catalysts for Preparative Organic Chemistry
Authors: Bölsing Friedrich , Hakim Assadollah 
Published: February 2015

Abstract
There are numerous simple chemical reactions in which reaction products arise, which compared with the materials at the outset, possess a considerably greater surface area. A significant example is the reaction of aluminium alcoholates with water. Reactions of this kind can, to a certain extent, be used as auxiliary reactions, in order to distribute other materials homogenously. In the chosen example, a material dissolved beforehand in the alcoholate, e.g. a solution of a metal salt, would be transferred in the course of the distributing reaction into the newly-developing structure of the reaction product. In this publication the application of some catalysts thus prepared to some classical organic chemical reactions is described by way of example
Zur Reaktivität von C—N-Doppelbindungssystemen, XIV [1] Über das 3.4-Dihydroisochinolin / The Reactivity of the C=N-Double Bound System, XIV [1] Reactions with 3,4-Dihydroisoquinoline
Authors: Ziegler Erich , Leitner Wolfgang , Sterk Heinz 
Published: February 2015

Abstract
3,4-Dihydroisoquinoline reacts with ethyl cyanoacetate in acetic acid/ acetic anhydride to yield the olefine 2. Cyanoacetic acid, ω-cyanoacetophenone and ω-nitroacetophenone act in the same way. Other CH-acidic compounds give addition reactions with 3,4-dihydroisoquinoline yielding 1,2,3,4-tetrahydroisoquinoline derivatives (9-22)
Ternäre Verbindungen in den Dreistoffsystemen Calcium-Kupfer-Phosphor (Arsen) / Ternary Compounds in the Systems Calcium - Copper - Phosphorus (Arsenic)
Authors: Mewis Albrecht , Blumstengel Peter 
Published: February 2015

Abstract
By investigations in the systems Ca-Cu-P(As) we found two ternary phases of the formulas CaCuP and CaCuAs, which crystallize in a hexagonal lattice. We suppose a modified Ni2lntype structure. Some details about a Calcium Copper Phosphide with a ThCr2Si2-type structure are given
Darstellung und Assoziation einiger Phosphiniminoborane / Preparation and Association of Some Phosphiniminoboranes
Authors: Maringgele W. , Meiler A. , Nöth H. , Schroen R. 
Published: February 2015

Abstract
N -Trimethylsily 1 -triphenylphosphinimine re - acts with halogenoboranes R2BX (R = organyl, F, Cl, Br; X = F, Cl, Br) to yield triphenylphosphiniminodihalogenoboranes and triphenylphosphiniminodiorganylboranes, respectively. In solution, the dihalogeno compounds are associated, probably dimeric, while the diorganyl derivatives are monomeric. Mass spectroscopic data of the compounds show them to be monomeric in the vapor phase
Entsteht bei der thermischen Zersetzung yon Natriumtrichloracetat Phosgen ? / Is Phosgene Formed in the Thermal Decomposition of Sodium Trichloroacetate ?
Authors: Dehmlow Eckehard V. , Franke Karl Heinz 
Published: February 2015

Abstract
Decomposition of sodium trichloroacetate in an autoclave yields mainly trichloroacetyl chloride (80%) at 180-200 °C. Carbon tetrachloride, chloroform, and perchloroacetic anhydride are minor products. Only traces of phosgene are formed. These arise from decomposition of perchloroacetic anhydride at temperatures above 200-220 °C (equation (5)). Phosgene is not formed in normal phase transfer catalytic reactions
Elektrochemische Intercalation und elektrische Leitfähigkeit von Graphitfasern / Electrochemical Intercalation and Electrical Conductivity of Graphite Fibers
Authors: Besenhard J. . , Fritz H. P. , Möhwald H. , Nicki J. J. 
Published: February 2015

Abstract
Lamellar compounds of graphite fibers have been prepared by electrochemical intercalation. The dependence of the electrical resistance on the intercalate concentration was determined by a quasi simultaneous method. A factor 30 decrease of the relative fiber resistance was obtained with fluorosulfuric acid.
Molekül-und Kristallstruktur des 5.5' -Diethoxycarbonyl-3.3' -diethyl-4.4' -dimethyl-pyrromethen-hydrobromids / Crystal and Molecular Structure of 5,5'-Diethoxycarbonyl-3,3'-diethyl-4,4'-dimethyl-pyirromethene Hydrobromide
Authors: Struckmeier G. , Engel J. , Thewalt U. 
Published: February 2015

Abstract
The crystal and molecular structure of the title compound has been determined by X-ray diffraction. The compound possesses an (almost) planar Z configuration. The ions form ion pairs in the solid state: each bromide anion is connected via two hydrogen bonds with a cation. The crystal data are: space group P21/n with Z = 4; cell dimensions a = 14.097(2), b = 11.591(2), c = 14.133(3) Å, β = 106,22(2)°.
Spectra and Decay Kinetics of Diadamantyl-Dioxetane Chemiluminescence
Authors: Neidl Cornelia , Stauff Joachim 
Published: February 2015

Abstract
The thermal decomposition of 1,2-diadamantyldioxetane was studied by kinetic and spectroscopic methods. Spectra of the chemiluminescence emitted during the thermally induced decomposition of 1,2-diadamantyldioxetane, tetramethyldioxetane and trimethyldioxetane were obtained and the influence of quenchers and radical-scavengers, and the presence of "heavy atoms" in the surrounding of the emitting species was investigated. The kinetics of the decay mechanism was followed by measuring the time dependence of the chemiluminescence. The influence of radical-scavengers, quenchers and "external heavy atoms" on the kinetics was assessed. Experimental results were discussed in terms of a biradical decay mechanism.
Organoborierung von Alkinylstannanen, VIII [1] Zur Reaktion von Alkinyltrimethylstannanen mit 1-Boracyclopentanen und Methylbis(tert-butyl)boran / Organoboration of Alkynylstannanes, VIII [1] The Reaction of Alkynyltrimethylstannanes with 1-Boracyclopentanes and Methy Ibis (tert-butyl) borane
Authors: Schmidt Axel , Wrackmeyer Bernd 
Published: February 2015

Abstract
1-Organyl-1-boracyclopentanes react with alkynyltrimethylstannanes to give 1-bora-cyclohexylid(2)enes as the only products. The analogous reaction with methylbis (tert-butyl)borane leads to a nonstatistical distribution of organoboration products. Structure and stereochemistry of the new compounds are discussed on the basis of methanolysis reactions and 1H, 11B and 13C NMR data.
The Molecular Structure of Allenes and Ketenes, XII [1] Four-Bond Proton-Proton Spin-Spin Couplings in Allenes
Authors: Runge Wolfgang 
Published: February 2015

Abstract
Four-bond proton-proton coupling constants in allenes are reported. The substituent effects on the coupling constants are discussed on the basis of the dual-substituent parameter approach. Furthermore, the coupling constants are related to quantum-chemical indices (electron densities, overlap populations) obtained from semiempirical CNDO/S and ab initio STO-3G calculations.
The magnitudes of the coupling constants depend upon the polar natures of the substituents as well as upon their charge-transfer abilities (resonance effects) to a com-parable amount.
In general, the coupling constants in 1,3-disubstituted allenes are nonadditive in ligand -specific parameters.
Strontiumphosphat-chromat( VI), Sr3(PO4)2·SrCrO4, eine dimorphe Hochtemperaturverbindung / Strontiumphosphate-chromate(VI), Sr3(PO4)2·SrCrO4, a Dimorphie High-Temperature Compound
Authors: Hartl K. , Braungart R. 
Published: February 2015

Abstract
Equimolar mixtures of Sr3(PO4)2 and SrCrO4 form two high-temperature compounds with different ranges of thermal stability. A rhombo-hedral defect-bariumphosphate structure with hexagonal axes ao - 1091 pm and c0 = 3978 pm is stable at 800-1100 °C. At higher temperatures (1200-1400 °C) it changes reversibly to a cubic Eulytite-type structure with ao = 1031 pm. At room temperature both modifications are meta-stable. The thermal stability of the rhombo-hedral form is raised by minute concentrations of gaseous chromium oxides or by partially ex-changing phosphate by chromate(V). With more than 6 mole% of Sr substituted by Ba, the cubic modification only can be obtained.
Kristallstruktur von Sr0,5Ba0,5Si2 bei hohen Drücken / Crystal Structure of Sr0,5Ba0,5Si2 at High Pressures
Authors: Evers Jürgen , Oehlinger Gilbert , Weiss Armin 
Published: February 2015

Abstract
A cubic polymorph (SrSi2 type of structure) is obtained if orthorhombic (BaSi2 type of structure) Sro.5Bao.5Si2 is treated in a belt type apparatus (40 kbar, 1000 °C): P4332 (or P4i32), Z = 4, a = 662.2 pm, xSi = 0.419.
Reaction of Trivalent Organophosphorus Compounds with Selenium
Authors: Konieczny Maria , Sosnovsky George 
Published: February 2015

Selenium derivatives of pentavalent organophosphorus compounds 9, 10, 11 (Ṙ = 2,2,6,6- tetramethyl-1-oxyl-4-piperidyl), 12 and 13 were prepared in 79-99%

yields via the reaction of the corresponding trivalent phosphorus compounds 14, 15, 16, 17, 18 with black
selenium in benzene at room temperature in 20 hours.
Ein neues Verfahren zur Bestimmung kleinster Mengen H2O mittels Ph3P und CCl4 /A New Way to Determine Smallest Amounts of H2O by Means of Ph3P and CCl4
Authors: Appel Rolf , Michel Werner , Morbach Wolfgang 
Published: February 2015

Abstract
A new and easier method of water determination in numerous organic solvents is founded on the measurement of the electrical conductivity in the system Ph3P/CCl4/H2O, that is characterised by a typical maximum minimum pattern.
The time interval up to the registration of the well-defined minimum is proportional to the amount of water which can be determined down to concentrations of 10-3 %.
High Power Density Lead Acid Cell Operating at 70 °C
Authors: Fritz Heinz P. , Besenhard Jürgen O. , Paxinos Antonios S. 
Published: February 2015

Abstract
The results presented show the feasibility of a high power density lead acid cell with tubular negatives and positives, operating at 70 °C. Although lead negatives are supposed to deteriorate fast at temperatures above 50 °C, tubular negatives at 70 °C exceed the cycle life of pasted negatives operating at conventional conditions. The high rate discharge capacity of negatives and positives is increasing considerably with temperature. It is concluded that the “temperature gain” of the negative electrode is due to increased mobility of soluble Pb2+ species through the passivating PbSO4 layer and to improved diffusion of H2SO4 in the pore structure.
Kristall- und Molekülstruktur eines „linearen“ Festkörpers mit drei verschiedenen Metallsträngen: [Pt(dapn)2] [Pt(dapn)2Br2] [(Cu3Br5)2] (dapn = 1.2-Diaminopropan)/Crystal and Molecular Structure of a Linear Chain Solid with Three Different Metal Chains: [Pt(dapn)2][Pt(dapn)2Br2][(Cu3Br5)2] (dapn = 1,2-diaminopropane)
Authors: Keller H. J. , Martin R. , Traeger U. 
Published: February 2015

Abstract
The compound {[Pt(dapn)2][Pt(dapn)2Br2]}(Cu3Br5)2, which was prepared by oxidation of Pt(dapn)2Br2 with CuBr2, crystallizes in the orthorhombic space group Bmmb (D2h
17), a = 5.617(4) Å, b = 16.206(6) Å, c = 22.00(1) Å, Z = 2. The experimentally determined density is 3.22 g · cm-3 (calculated 3.40). The structure has been determined by Patterson and Fourier methods from single crystal diffractometer data and refined by least squares to R = 0.085 for 485 independent reflections. Crystals of the title compound contain halide-bridged copper and platinum chains.
Metallkomplexe mit anionischen Liganden von Elementen der 4. Hauptgruppe, XI Homogene Trichlorstannidometallat(O)-Komplexe der 6. und 8. Nebengruppe/Metal Complexes with Anionic Ligands of Elements of the Main Group IV, XI Homogenous Trichlorostannido Metalate(O) Complexes of the Transition Groups VI and VIII
Authors: Krück Thomas , Thielmann Werner , Sauer Christian 
Published: February 2015

Abstract
Various homogeneous metalate(O) complexes are synthesized with [SnCl3] -as a ligand. Complexes of the type [M(SnCl3)6]6- are prepared from [M(CO)3(SnCl3)3]3-(M = Cr, Mo, W) in nitromethane. [Fe(SnCl3)5]5- is formed by UV irradiation of [Fe(CO)4SnCl3]- in aceto-nitrile. [M(SnCl3)4]4-(M = Ni, Pd, Pt) anions are synthesized by thermal substitution reactions with Ni(CO)4, Pd(PF3)4, and Pt(PF3)4. All metalate(O) ions are isolated as salts with the [N(C2H5)4]+ cation and characterized by IR spectra and 119mSn-Mössbauer spectra as well as by analysis.
Einige Gold(I)-Komplexe von Phosphor-yliden und ihre Wirkung in der Gold-Therapie am Modell der Adjuvans-Arthritis /Some Gold(I) Complexes of Phosphorus Ylides and their Effect in Gold Therapy with the Adjuvans Arthritis Model
Authors: Schmidbaur Hubert , Mandl Johann R. , Wohlleben Anette , Fügner Armin 
Published: February 2015

Abstract
A series of ionic phosphorus ylide complexes of gold(I) halides has been prepared and characterized through analytical and spectroscopic data. The compounds are of the type [R3PAu-CH2PR3]⊕Cl⊖, R = C2H5, and [(R3PCH2)2Au]⊕X⊖ where R = CH3, C2H5, n-C4H9, C6H5, and X = Cl, Br (1-6). Along with a cyclic complex [(C2H5)2P(CH2)2Au]2 (7) these materials have been tested in a pharmacological study for a possible use in an oral arthritis therapy.
Compounds 1 and 5-7 showed no or only neglegible effects on Adjuvans-arthritis induced in rats, while 3 and 4 were very toxic. Complex 2 was comparable to standard chrysotherapeutic agent3 in a preliminary study, but a more detailed investigation including LD50 tests for mice showed too narrow a gap between its toxical and therapeutically useful doses.
Di-μ-methoxi-bis[dicarbonyl(tri-tert-butylphosphin)ruthenium(I)](Ru-Ru)/Di-μ-methoxi-bis[dicarbonyl(tri-tert-butylphosphine)ruthenium(I)](Ru-Ru)
Authors: Schumann Herbert , Opitz Joachim 
Published: February 2015

Abstract
{(Ru(μ-OCH3)(CO)2[P(t-C4H9)3]}2 is prepared by the reaction of Ru3(CO)12 with P(t-C4H9)3 in methanol or by refluxing Ru(CO)3[P(t-C4H9)3]2 in methanol. The IR, Raman, and NMR spectra are reported and discussed.
Zweikernkomplexe mit heterometallischer Palladium-Platin-Bindung/Binuclear Complexes Containing a Heterometallic Palladium-Platinum Bond
Authors: Werner Helmut , Kühn Alfred 
Published: February 2015

Abstract
The reaction of C5H5Pt(2-RC3H4) (R = H, CH3) with PdL2 (L = P(i-C3H7)3, P(c-C6H11)3) in the molar ratio of 1:1 produces the binuclear complexes (μ-C5H5)(μ-2-RC3H4)PdPtL2 in which the metal atoms have the formal oxidation state + 1. Based on the 1H, 13C and 31P NMR spectra it is assumed that the structures of the new complexes are analogous to those of the corresponding Pd2 and Pt2 compounds but that they contain a heterometallic palladium-to-platinum bond. The synthesis and the spectra of the bis(allyl) complex (μ-2-CH3C3H4)2PdPt[P(i-C3H7)3]2 are also reported.
Darstellung und Struktur des Komplexes [C5H5Cr(NSiMe3)2]2 (Zur Reaktion von Cyclopentadienylmetallchloriden mit Bis(trimethylsilyl)diazen)/Preparation and Structure of the Complex [C5H5Cr(NSiMe3)2]2 (Reaction of Cyclopentadienylmetal Chlorides with Bis(trimethylsilyl)diazene)
Authors: Wiberg Nils , Häring Heinz-Wolfgang , Schubert Ulrich 
Published: February 2015

Abstract
Bis(trimethylsilyl)diazene reacts with cyclopentadienyl metal chlorides with reduction followed by addition. According to X-ray analysis the chromium complex [C5H5Cr(NSiMe3)2]2, formed by the reaction of C5H5CrCl2 with azosilane, contains tri-methylsilylazene ligands. The addition of Me3Si-N = N-SiMe3 to chromium is therefore connected with a cleavage of the azo group in this case.
Siliciumverbindungen mit starken intramolekularen sterischen Wechselwirkungen, VIII [1]. Neue Siloxanverbindungen einiger Übergangsmetalle / Silicon Compounds with Strong Intramolecular Steric Interactions, VIII [1]. New Siloxane Compounds of Some Transition Metals
Authors: Weidenbruch Manfred , Pierrard Claude , Pesel Helge 
Published: February 2015

Abstract
Tri-tert-butylsiloxane compounds of transition metals are obtained by two different routes, one of these involves condensation of tri-tert-butylsilanol with the binary oxides V2O5, CrO3, MoO3, and Re2O7, while the other proceeds via a similar reaction between the chlorides VOCl3, NbCl5, TaCl5, CrO2Cl2, and the silanol. The new compounds, having good thermal stability and remarkable resistence to hydrolysis, are characterized by IR, 1H NMR, and mass spectra.
Kinetic Study of the Acid Hydrolysis of Ethyl Hydrogen Succinate in Binary Solvent Mixtures
Authors: Khalil Fayez Y. , Hanna M. T. 
Published: February 2015

Abstract
The specific rate constants for the acid-catalysed hydrolysis of ethyl hydrogen succinate in water and in a series of acetone-water and dioxane-water mixtures were determined at 30-45 °C. The solvent composition covered the range 0-90% by weight of the organic solvent. The rate was found to decrease to a minimum at about 80% of the organic solvent then to increase again with successive addition of the latter. In dioxane-water medium a slight initial increase in rate on the first addition of dioxane to water was observed and attributed to an increase in the number of "free" water molecules. The activation energy showed only slight dependence on solvent composition. The radius of the activated complex was calculated in the two media. The thermodynamic parameters were evaluated and discussed in terms of solvent composition. The reaction proved to be essentially an ion-dipole rather than an ion-ion interaction. A comparative discussion of the specific solvent effects of the two solvent systems under consideration is presented, based on the respective bond energies as given by the heats of mixing of the solvent components.
Synthesis of New Furobenzoxazole and Furoflavone Derivatives
Authors: Hishmat Orchidée H. , Khalil Khairia M. , El-Ebrashi Nabila M. A. , Khodeir Mohamed N. M. 
Published: February 2015

Abstract
The synthesis of visnaginone-oxime (2 a) and khellinone-oxime (2 b) is reported. Beckmann rearrangement of 2 a and 2b using different cyclising agents was studied. Structure assignement for the produced benzoxazole derivatives and benzisoxazole derivatives was confirmed by chemical and spectral evidences. Utilization of visnaginone (la) and khellinone (lb) for the synthesis of new furoflavone derivatives was also undertaken.
Studies on Ferrocene and its Derivatives, VI. Cyclocondensation Reactions of Some Ferrocenyl Anils
Authors: Hassan Kh. M. 
Published: February 2015

Abstract
Ferrocenealdehyde have been condensed with some amines giving the corresponding Schiff bases. Cyclocondensation reaction of chloroacetylchloride (or thioglycolic acid) on ferrocenyl Schiff bases yielded ferrocenyl-β-lactams and ferrocenylthiazolidinones.
Synthesis of Some New Spiro Heterocyclic Nitrogen Compounds, II
Authors: Hassan Kh. M. , El-Shafei A. K. , El-Kashef H. S. 
Published: February 2015

Abstract
The synthesis of spiro-γ-amino(or γ-chloro)-β lactams and spiro-4-thiazolidones by the cycloaddition reaction of 3-isatylidene anil derivatives, phthalylglycyl chloride (or chloroacetyl chloride) and/or mercaptoacetic acid has been investigated. 3-Isatylidene anils were prepared by the reaction of isatine with substituted aniline, a-naphthylamine, 2-aminothiazoles, 2-aminothiadiazoles and 2-aminopyridine, respectively.
Über den Farbstoff der Gramfärbung von Bakterien / On the Pigment of the Gram Staining of Bacteria
Authors: Lecea M. J. Volz-de 
Published: February 2015

Abstract
Tris-(4-dimethylaminophenyl)-carbenium-triiodid, a salt of crystal violet, is determined as probable structure of the Gram Staining of Bacteria. A mechanism of it is proposed based on the chemical properties of this salt.
Hydrazine Derivatives of β-Dicarbonyl Compounds, Part I. Studies on Some Benzoylacetaldehyde Aroylhydrazones
Authors: Rateb Latif , Azmy B. , Nashed M. A. , Iskander M. F. 
Published: February 2015

Abstract
A series of benzoylacetaldehyde benzoylhydrazones were prepared and characterised. Their UV, IR, and 1H NMR spectra suggest the enol-imine structure rather than the keto-imine form of analogous Schiff bases. The pKa values of these aroylhydrazones were also measured and correlated with the Hammet substitution constants.
Attempted cyclizations of these open-chain aroylhydrazones afforded the corresponding 5-hydroxy-2-pyrazoline compounds rather than the expected pyrazoles.
13 C NMR Spectra of Chromeno-and Prenylated Flavones Structure Revision of Mulberrin, Mulberrochromene, Cyclomulberrin and Cyclomulberrochromene
Authors: Chari V. Mohan , Ahmad Saboor , Österdahl Bengt-Göran 
Published: February 2015

Abstract
Reappraisal of the 13C NMR data for mulberrin and mulberrochromene indicate a revision of structure for these two compounds as well as for cyclomulberrin and cyclo-mulberrochromene .
Ternäre Phasen im System Eisen-Thallium-Schwefel/Ternary Phases in the System Iron Thallium-Sulfur
Authors: Zabel Manfred , Range Klaus-Jürgen 
Published: February 2015

Abstract
The Compound TlFeS2 was synthesized from TlS/Fe/S-mixtures. Crystals are mono-clinic (space group C2/m) with a = 1164.4(6) pm, b = 530.8(3) pm, c = 1050.9(5) pm, β = 144.58° and Z = 4. The structure comprises [FeS2-]∞-chains parallel b, built from edge-shared FeS4-tetrahedra. Relations between TlFeS2 and orthorhombic CsFeS2 are discussed. Tetragonal or monoclinic distorted tetragonal ternary phases occur with composition FexTl2S4 (2.6 < x < 3.6 ).
Methylmetallbromo-und -iodokomplexe des Galliums und Indiums/Methyl Metal Bromo and Iodo Complexes of Gallium and Indium
Authors: Widler Hans-Jörg , Weidlein Johann 
Published: February 2015

Abstract
The interaction of (CH3)3MIII or (CH3)2MIIIHal with (CH3)3MV Hal2 and (CH3)4MVHal, respectively, yields methylhalogeno metalates of the general composition [(CH3)4MV]+[(CH3)4-xMIIIHalx]-. (With MV = As, Sb; MIII = Ga, In; Hal = Br, I and x = 1-3.) The vibrational spectra of these ionic compounds are reported and discussed.
Phosphorus-Nitrogen Compounds, Part XLV Friedel-Crafts Reactions of Some Aminochlorocyclotriphosphazatrienes
Authors: Das Sunil Kumar , Masood-Ul-Hasan  , Shaw Robert A. , Smith Barry C. , Woods Michael 
Published: February 2015

Abstract
Chloroaminocyclotriphosphazatrienes, N3P3Cl6-nRn [R = NHMe (n = 2), NHEt (n= 1, 2), NHPrn (n = 4), NHPri ( n = 1, 4), NHBut (n = 2, 4), NHCH2Ph ( n = 1), NEt2 (n= 1, 2, 3), N(CH2Ph)2 (n = 1)] react with benzene in the presence of anhydrous aluminium chloride to give phenylated products: phosphazenes and/or hydrocarbons. The structures of the phenylphosphazenes are assigned from their NMR spectra. Reactions of N3P3Cl5R (R = NMe2, NC5H10) have been reinvestigated. The influence of the amino groups on rates and products is discussed.
Substituent and Solvent Effects on HCN Elimination from 1-Aryl-1,2,2-tricyanoethanes
Authors: Fouad Fouad M. , Farrell Patrick G. 
Published: February 2015

Abstract
The elimination of HCN from 9-dicyanomethyl-fluorene (2), 1,1-diphenyl-1,2,2-tricyanoethane (3), and 2-phenyl-1,1,2-tricyanopropane (4) in anhydrous methanol has been studied and shown to occur via an (E l)anion mechanism. Elimination of HCN from 2 in acidic, buffered and MeO-/MeOH solutions have also been studied. Addition of water or benzene to the reaction medium shifts the mechanism to (E 1 CB)ʀ. Elimination of HCN from N,N-dimethyl-4-(1,1,2-tricyanoethyl) aniline (5) in anhydrous methanol occurs via an (E 1 cB)ʀ mechanism and the kinetics indicate that addition of HCN to the product alkene occurs. Activation parameters, isotope effects and solvent effects have been examined in an effort to obtain information about the nature of the transition states of these reactions.
Synthesis of Hexahydro-bis[benzo-dipyrazolones, benzo-diazepinone] and Dithiopyrimidoquinazolinetetrone
Authors: Amer Fathy Abdel Kader , Afsah El-Sayed , El-Zimaity Mohamed Tawfik , Metwally Mohamed Abbas 
Published: February 2015

Abstract
A new series of hexahydro-bis-benzodipyrazolones (2a-e) were obtained by the inter-action of 1 with hydrazines. These pyrazolones underwent coupling reaction with different diazonium salts to give 7a-g. Compound 1 when treated with acid hydrazides gave 3 a, b, and when subjected to Japp-Klingemann reaction in alkaline medium gave 6a-e. The hexahydro-bis-benzodiazepine (8), and dithiopyrimidoquinazolinetetrone (10) were obtained by the interaction of 1 with o-phenylenediamine and thiourea respectively.