bluuebunny/crossref_metadata_2025_split huggingface dataset:
THE FUNCTION OF PHOSPHORUS , NICKEL AND H2S IN THE HDN OF PIPERIDINE AND PYRIDINE OVER NiMoP/Al2O3 CATALYSTS
Authors: Jlan M. , Cerda J. L. Rico , Prins R. 
Published: September 2010

AbstractThe effect of phosphorus in the hydrodenitrogenation (HDN) of piperidine and pyridine over NiMo/Al2O3 catalysts was studied. In the absence of H2S no effect of P was found, but in the presence of H2S the HDN activity of NiMo/Al2O3 catalysts decreased as the P content in the catalysts increased. It is concluded that phosphorus has a negative effect on the C‐N bond cleavage in piperidine, as well as on the subsequent hydrogenation of the C5 alkene intermediates. Also the influence of Ni was found to depend on the reaction conditions. A substantial promotion effect of Ni could only be observed in the presence of H2S, both in the C‐N bond cleavage of piperidine and in the pyridine hydrogenation. The activity for the HDN of piperidine of NiMo(P)/Al2O3 catalysts increased with increasing H2S concentration up to H2S/H2 = 12.5 × 10−3 mol/mol.
PREPARATION OF UNIFORMLY DISPERSED MoP/AL2o3 CATALYSTS
Authors: Jian M. , Prins R. 
Published: September 2010

AbstractSeveral preparative factors which determine the properties of MoP/Al2O3 catalyst have been studied. With sequential impregnation, the Mo dispersion is always worse than with co‐impregnation, while in co‐impregnation the pH of the impregnating solution should be properly adjusted according to the P content. Since both molybdate and phosphate ions interact strongly with the alumina surface, they can adsorb directly at the pore mouths and inhibit other ions to enter the pores. Especially in the case of sequential impregnation, this results in a non‐uniform distribution of Mo and P over the alumina particles. In the case of co‐impregnation, with controlled pH and enough phosphoric acid, phosphomolybdate ions are formed which interact less strongly with the alumina surface. In that case, Mo can reach the inside part of the alumina particles and attain a uniform distribution. Also the Al2O3 particle size influences the Mo dispersion. Smaller particles have more outer surface and therefore it is easier for the molybdate and phosphate ions to diffuse to the centers of the pores, so that there is less chance that bulk Mo compounds are formed.
Effect of Boron Addition on the State and Dispersion of Mo Supported on Alumina
Authors: Morishige Hidetaka , Akai Yoshio 
Published: September 2010

AbstractThe influence of B on the state and dispersion of Mo phases on Al2O3 have been investigated by bulk and surface characterization techniques, e.g., XRD, XPS and TPR, respectively. In the absence of B, the dispersion of Mo phases is in good agreement with the theoretical value calculated from Kerkhof‐Moulijn model, suggesting that Mo atoms disperse easily on Al2O3 surface. XPS results indicate that B addition to Al2O3 leads the Mo dispersion to decrease in comparison with the theoretical monolayer value. This result is also confirmed by XRD analysis, which shows the formation of crystalline MoO3 particles with B addition. TPR profiles for Mo/Al2O3 consists of two reduction peaks, a low temperature peak (400°C ± 450°C) and a high temperature one (770°C ± 810°C), respectively. The peak Intensity of the higher temperature decreases rapidly with B addition, whereas that of lower temperature increases with increasing B contents. Consequently, these results suggest that B addition weakens the interaction between Mo species and the Al2O3 surface.
Effect of H2S and NH3 on Aromatics Hydrogenation Over Sulfided Pt and NiMo Based Hydrotreating Catalysts
Authors: Mignard S. , Marchal N. , Kasztelan S. 
Published: September 2010

AbstractThe influence of H2S or NH3 partial pressure on the rate of toluene hydrogenation over sulfided NiMo and Pt catalysts has been investigated. H2S is an inhibitor for both catalysts and its negative effect is totally reversible. NH3 is also a contaminant, however, its negative effect is only partially reversible. At very low H2S and NH3 partial pressure and in the same operating conditions, the Pt catalyst is always more active per gram of metal than the NiMo catalyst. The NiMo sulfide catalyst is more sensitive to NH3 than to H2S whereas the Pt catalyst is more sensitive to H2S than to NH3.
Organometallic Complexes as Models for the Adsorption of Thiophenes on Hydrodesulfurization (HDS) Catalysts
Authors: Angelici Robert J. 
Published: September 2010

AbstractIn this review are discussed the known modes of thiophene coordination η1(S), η2, η4 and η5) in organometallic complexes. Their structures, bonding and stabilities are related to the adsorption of thiophene on heterogeneous hydrodesulfurization (HDS) catalysts. Modes of benzo[b]thiophene and dibenzothiophene coordination in organometallic complexes are briefly summarized.
The Bond Energy Model for Hydrotreating Reactions: Theoretical and Experimental Aspects
Authors: Topsøe H. , Clausen B. S. , Topsøe N.‐Y. , Nørskov J. K. , Ovesen C. V. , Jacobsen C. J. H. 
Published: September 2010

AbstractRecently, we have shown that the periodic variations in the HDS activities of different transition metal sulfides can be explained by a Bond Energy Model (BEM) based on theoretically calculated metal sulfur bond energies. The model differs from many previous explanations for the observed Balandin‐type volcano curves. Specifically, the BEM model suggests that under most conditions, the variations in HDS activities are dominated by differences in the concentration of coordinatively unsaturated sites (CUS). The model has also been used to estimate the metal sulfur‐bond strength of Co‐Mo‐S and NL‐Mo‐S and the promotion is explained in terms of the estimated bond energies for the different types of surface structures. EXAFS and TPR‐S results are seen to provide experimental evidence for the BEM model. Besides coordinatively unsaturated sites, surface SH groups are also present and new evidence is presented based on 1H MAS NMR measurements. SH groups may also play an important catalytic role in the supply of hydrogen and for acid catalyzed reactions. The relative importance of the SH groups and the CUS sites appears to depend critically on the metal‐sulfur bond energy. Furthermore, the BEM model is shown to provide a useful starting point for understanding various reactivity trends observed under different reaction conditions.
Interaction of Thiophene with a Molybdenum Disulfide Catalyst: An Inelastic Neutron Scattering Study
Authors: Mitchell P. C. H. , Green D. A. , Grimblot J. , Payen E. , Tomkinson J. 
Published: September 2010

AbstractThe inelastic neutron scattering (INS) spectra of thiophene adsorbed on MoS2/alumina catalysts are compared with the spectrum of free thiophene. Changes in the vibrational modes of thiophene due to interaction of thiophene with the catalyst are observed. On the sulfided not‐reduced catalyst out‐of‐plane C‐H motions of thiophene are modified. On the reduced catalyst in‐plane motions of α‐H's are also modified. Evidently the thiophene molecules lie flat on the sulfided catalyst and, in addition on the reduced catalyst, bind to the exposed molybdenum centre through ring sulfur with consequent modification of the α‐H motions.
Off‐site Regeneration of Hydroprocessing Catalysts
Authors: Dufresne P. , Brahma N. 
Published: September 2010

AbstractThis paper describes the basic phenomena occurring during oxidative regeneration of hydroprocessing catalysts, as well as laboratory experiments studying the removal of carbon and sulfur as a function of temperature. It was found that carbon is readily eliminated in a single step between 300°C and 450°C. The elimination of sulfur starts as low as 150°C and is terminated only at high temperatures (600°C). The combustion of C and S, however, seems to be limited by an oxygen diffusion effect into the pores of the catalyst. In addition, the evolution of Surface Area (SA) and Dynamic Oxygen Chemisorption (DOC) values versus regeneration temperature applied is discussed. DOC is used to evaluate the dispersion of the active metal‐sulfide phase. DOC and SA measurements are complementary techniques for quality assurance of the regeneration process. A substantial loss of SA is found above 600°C while DOC values begin to decrease at lower temperatures.The EURECAT regeneration process is described as well as an example of an industrial regeneration.
ETUDE PHYSICO‐CHIMIQUE ET REACTIVITE DES COMLPEXES DE TRANSFERT DE CHARGE ENTRE LES IMINES SUBSTITUEES ET LES P‐BENZOQUINONES
Authors: Abdaoui Mohamed , Messadi Djelloul , Dewynter Georges‐Francis 
Published: September 2010

AbstractSubstituted imines (donors) and acceptors such as the chloranil (CHL), the bromanil (BRL) and the 2,3‐dichloro‐5,6‐dicyano benzoquinone (DDQ) form charge transfert complexes in the liquid and solid states. Physico‐chemical properties as well as the reactivity of the complexes have been studied.Complexes maximal wave lengths and their formation constants and the ionization potentials of the donors have been determined by UV‐visible absorption spectrometry. The CTC formation is confirmed by infrared, CNMR, and mass (electronic impact method) spectra. The unexpected formation of the substitution derivatives of the CHL and the BRL has been investigated and explained.
SUR LA SENSIBILITE MAGNETIQUE DES RESONATEURS PIEZOELECTRIQUES
Authors: Gire Alain , Lomaglio Germaine , Théobald Jean‐GÉRard 
Published: September 2010

AbstractQuartz resonators are influenced by magnetic fields. This is easily observed in strong magnetic fields (0,1 ‐ 0,7 Tesla). The perturbations are mainly due to the magnetic properties of nickel contains of the electrodes, and also to the ΔE effects also called Guillemin effect on the same electrodes.One can observe also “accidents” which occur in very low fields and for which we call for magnetic resonance. These effects could be due to the magnetic resonance of the nickel metallisation of the electrodes. We examine also the possibility that the presence of paramagnetic centers inside the cristal is responsible of absorption of piezoelectric vibrations. These phenomenon occur by the modulation of the magnetic field caused by the neighbouring of one magnetic center.
X‐RAY ANALYSIS OF PYRROLIZIDINES SYNTHESIZED BY DIASTEREOSELECTIVE α‐CYCLISATION OF CAPTODATIVE OR PUSH‐PULL ENAMINES WITH DIMETHYL ACETYLENEDICARBOXYLATE
Authors: Tinant B. , Feneau‐Dupont J. , Declercq J. P. , De Boeck B. , Jiang S. , Janousek Z. , Viehe H. G. 
Published: September 2010

AbstractThe title reactions lead to unique diastereoisomers of pyrrolizidines 1a [dimethyl 2,3‐dehydro‐1‐methyl‐3‐cyanopyrrolizidine‐1,2‐dicarboxylate] or 1b [dimethyl 2,3‐dehydro‐1‐(ethoxycarbonylmethyl)l‐3–phenyl‐pyrrolizidine‐1,2‐dicarboxylate] with relative stereochemistry (1a: trans; 1b: cis) established by X‐ray diffraction analysis. The heterocycle adopts a different conformation in 1a and 1b.
TUNGSTEN CARBONYL PRECURSORS IN CATALYZED OLEFIN METATHESIS VI. HOMOGENEOUS 2‐PENTENE METATHESIS BY [W(CO)3Cp]2/RnSnX4‐n/iBuALCL2OR AICI3/O2 SYSTEMS
Authors: van Ruyskensvelde S. , Bossuyt A. , Haemers T. , Verdonck L. 
Published: September 2010

AbstractThe catalytic systems [W(CO)3Cp]2/ RnSnX4‐n activated by iBuAICI2 or AICI3 / O2 show high conversion and good selectivity for the metathesis of 2‐pentene. When the system is activated by iBuAICI2, both % conversion and selectivity are optimized with a W/Sn/AI/O2 ratio of 1/1/10/10. For the AICI3‐systems the optimal W/Sn/AI/O2 ratio seems to be 1/1/10/5.The influence of the coprecursor, RnSnX4‐n, is based on the modulation of the alkyl/halogen balance and Lewis‐acidity of the reaction mixture. The stereoselectivity data of all studied catalytic systems, compare well with those of totally different homogeneous catalytic tungsten systems.
SYNTHESE DE NOUVELLES STRUCTURES D'INTERET BIOLOGIQUE RENFERMANT UN BLOC ADAMANTANE PAR MONOALKYLATION ET MONOCARBAMOYLATION L'URACILE DE LA THYMINE ET DU 5‐FLUOROURACILE
Authors: Hedayatullah Mir , Challier Anthony , Roger Annie , Nachawati Imad 
Published: September 2010

AbstractA novel, efficient, and regioselective route to the potentially active pyrímidines of biological interest bearing cage system derived from adamantane is described utilizing substitution or addition reactions under solid‐liquid phase transfer conditions or by a non‐catalytic procedure.
VOLTAMMETRIC BEHAVIOUR OF IMIDAZOLE AND 2‐METHYLDERIVATIVE WITH PENTACYANOFERRATE II. Ko AND α VALUES
Authors: López V. , Arevalillo A. M. 
Published: September 2010

AbstractVoltammetric investigation of imidazole and 2‐methyl‐imidazole with pentacyanoferrate II in aqueous solutions has been carried out with a platinum rotating electrode. The kinetic parameters ko and α of these systems have been determined at different pH values.
OXYDATION CATALYTIQUE DU TOLUENE EN PHASE LIQUIDE PAR LE REACTIF DE FENTON FeII‐H2O2 ET LE SYSTEME D'UDENFRIEND MODIFIE FeII‐O2REGENERES PAR VOIE ELECTROCHIMIQUE
Authors: Doidy V. , Carré B. , Bouchoule C. , Barrault J. , Blanchard M. 
Published: September 2010

AbstractThe oxidation of toluene was carried out at room temperature with a Fenton reactant FeII‐H2O2 in a diphase medium and a modified Udenfriend FeII‐O2 system electrochemically regenerated We remarked that the Udenfriend system is much more selective for oxidation products of the methyl group (benzaldehyde, benzyl alcohol) than for the hydroxylation products of the aromatic cycle (ortho‐ and para‐cresols, methyl‐p‐quinone). This tendency is the opposite with a Fenton reactant. Furthermore, it is to be noted that the regeneration of the catalyst results in a significant increase in the activity of the two catalytic systems. As for as the Fenton reactant is concerned, the use of a phase transfering agent (tetrabutylammonium bromide) made the reaction possible and improved the activity of the system.
Pd/AIPO4 CATALYSED SELECTIVE LIQUID‐PHASE HYDROGENATION OF β‐IONONE INTO CIS‐DIHYDROIONONE
Authors: Bouchry Naima , Aune Jean‐Pierre , Rais Taoufiq 
Published: September 2010

AbstractThe liquid‐phase hydrogenation of β‐ionone 1 was carried out at 302 K with 0.205 MPa of initial hydrogen pressure in methanol on Pd/AIPO4 catalyst (2‐3 %). The cis‐dihydroionone 2. was obtained with a 83 % selectivity which is independent of the degree of conversion. The reaction rate depends on the chloride concentration in the catalyst and the reaction selectivity is a function of the support of the Pd. According to the Langmuir‐Hinshelwood kinetic models and the Horiuti‐Polanyi type mechanism, the reaction order with respect to β‐ionone concentration is negative and of one half order with respect to the hydrogen pressure. The comparison with results obtained over Pd/C catalyst and those obtained in the catalytic hydrogenation of α‐ionone suggests that the catalytic hydrogenation of β‐ionone could take place on two different active sites of the Pd.
ADDITION DES DIAZOMETHANE ET DIAZOETHANE ET AUX α‐NITRO PARANITROCINNA‐MATES DE METHYLE ISOMERES GEOMETRIQUES ET A L'α‐NITRO PARANITRO‐BENZYLIDENE ACETONE Z. ETUDE PHYSICOCHIMIQUE ET THERMOLYSE DES PYRAZOLINES OBTENUES
Authors: Piet J. C. , Cailleux P. , Benhaoua H. , Danion‐Bougot R. , Carrié R. 
Published: September 2010

AbstractCycloadditions of diazomethane and diazoethane on methyl α‐nitro paranitrocinnamates E and Z lead to corresponding pyrazol‐1‐ines, Relations between stereochemistry (and conformation) of these latter and nature (and stereochemistry) of obtained compounds during their thermolysis are shown. After isomerisation in pyrazol‐2‐ines and removal of HNO2, these pyrazol‐1‐ines give pyrazoles. In comparison, reactions of α‐nitro paranitrobenzylidene acetone Z with CH2N2 and CH3CHN2 are also studied.
OXYDATION DE PYRROL‐1‐INES A L'AIDE DE PERACIDES
Authors: Perrocheau J. , Carrié R. 
Published: September 2010

AbstractOxidation of 2‐phenyl pyrrol‐1‐ines with metachloro‐ or paranitro‐perbenzoic acids gives to corresponding nitrones. The photochemical cyclisation leads to bicyclic oxaziridines. Discussion on the stereochemistry of this electrocyclisation has been attempted.
Structural Characterization of Paramagnetic Octahedral Homoscor‐Pionate (Polypyrazolylborate) Cobalt Complexes by 1H and 13C NMR Spectroscopy and by FAB‐Mass Spectrometry
Authors: Aubagnac Jean‐Louis , Claramunt Rosa MarÍA , Elguero JosÉ , Gilles Isabelle , Sanz Dionisia , Trofimenko Sviatoslav , Virgili Albert 
Published: September 2010

Abstract1H and 13C NMR spectroscopy as well as the FAB mass spectrometry have been applied to six bis[tris(pyrazol‐1‐yl)borates]Co(ll) and one bis[tetrakis(pyrazol‐1‐yl)borate]Co(ll). These octahedral complexes are paramagnetic and it was therefore very difficult to obtain their 13C NMR. The isotropic shifts are very large and characteristic of the different positions of the pyrazole and the boron substituents. FAB‐MS also is an interesting method to characterize these complexes, since they give abundant molecular ions and specific fragmentation.
Reactivite De la N‐Ethoxycarbonyl‐N‐(2,2,2‐Trichloroethylidene)Amine Avec Les Precurseurs De Quelques Diarylnitrilimines et Quelques Arylnitriloxydes
Authors: Belaissaoui Abdelhak , Morpain Claude , Laude Bernard 
Published: September 2010

AbstractThe reaction of diarylnitrilimines 2 with N‐ethoxycarbonyl‐N‐(2,2,2‐trichloroethylidene)amine 1 gives substituted 1,2,4‐triazolines 4. With the arylnitriloxides precursors 3, the cycloaddition reaction competes with a nucleophilic addition leading to a mixture of substituted 1,2,4‐oxadiazoline 6 and ethyl 1‐O‐(a‐chloroaraldoximino)‐2,2,2‐trichloroethylcarbamate 7.
Chlorosulfonic Acid Promotes Unusually Selective Chlorination of 2‐Alkanones with Sulfuryl Chloride. Synthesis of 3,3‐Dichloro‐and 1,1,3,3‐Tetrachloro‐4‐Methyl‐2‐Pentanone
Authors: De Buyck Laurent , Esprit Bart 
Published: September 2010

AbstractChloride ions formed during the chlorination of ketones with sulfuryl chloride catalyze the production of chlorine. The phenomenon can be suppressed by addition of chlorosulfonic acid, causing a significant change in the regioselectivity of chlorination of 2‐alkanones. Thus from 4‐methyl‐2‐pentanone in the presence of chlorosulfonic acid and the N,N‐dime‐thyloctylammonium salt the 3,3‐dichloroketone was obtained with 76‐78% selectivity (70% isolated) at 40 ± 7°C. After 24h at 90‐105°C the 1,1,3,3‐tetrachloroketone was formed with 90‐92% selectivity and isolated in 80% yield after haloform cleavage of the 1,1,1,3‐isomer. In the absence of chlorine the chlorination involves equilibrated mixtures of enolic intermediates due to competing C‐protonation.
Synthesis of 7‐Bromo‐5‐iodo‐4‐oxo‐1,4‐dihydroquinoline‐2‐carboxylic acid
Authors: Dumont Filip , Slegers Guido 
Published: September 2010

AbstractThe synthesis of 7‐bromo‐5‐iodo‐4‐oxo‐1,4‐dihydroquinoline‐2‐carboxylic acid 7 is described. The synthesis was started from 2,6‐dibromo‐4‐nitroaniline and carried out using a modified Conrad‐Limpach procedure followed by a nucleophilic non‐isotopic exchange.
Studies on the Stereo‐ and Enantioselective Synthesis of 11,12‐epoxy‐Sarcophytol‐A, 11,12‐epoxysarcophytol‐A acetate and 11,12‐epoxy‐cembrene‐C. Synthesis of 5,9,13‐trimethyl‐2‐isopropyl‐12(S),12(S)‐epoxy‐14‐bromo‐2(Z),4(E),8(E)‐tetradecatrienenitrile
Authors: Yue Xiangjun , Li Yulin , Sun Yajie 
Published: September 2010

AbstractAn efficient synthesis of 5,9,13‐trimethyl‐2‐isopropyl‐12(S), 13(S)‐epoxy‐14‐bromo‐2(Z),4(E),8 (E)‐tetradecatrienenitrile, a key intermediate in the synthesis of antitumor cembranoids including 11,12‐epoxy‐sarcophytol‐A, 11, 12‐epoxysarcophytol‐A acetate and 11, 12‐epoxycembrene‐C, was first described through seven step sequence in ∼32% overall yield from E, E‐farnesol.
Nouveaux decontaminants generation “in situ” d'un peracide par action d'un persel sur un initiateur, reactivite de ce peracide vis‐a‐vis du paraoxon
Authors: Lion Claude , Hedayatullah Mir , Charvy Claude , Briand Sylvette , Vincent StÉPhane , Fosset Laurent , Delmas GÉRard , Magnaud Gilbert , Desgranges Michel , Sentenac‐Roumanou Henri 
Published: September 2010

AbstractThe formation of peroxyacids by the reaction of a persalt (sodium percarbonate, sodium perborate,…) with an initiator (TAED, TAGU, NOBS, ISNOBS, PAG, acylsugars) has been developed. The reactivity of these peroxyacids generated “in situ” has been studied in the destruction of paraoxon (0,0‐diethyl O‐paranitrophenylphosphate) with some long chain tetraalkylammonium salts.
Successive‐Substitution Methods in Chemical Equilibrium Calculations. A Novel, Always‐Converging, Usually Fast Algorithm
Authors: Cardinali Mario E. , Giomini Claudio , Marrosu Giancarlo 
Published: September 2010

AbstractSuccessive‐substitution methods, long employed for solving difficult cases of numerical problems concerning chemical equilibrium, often generate divergent or slowly convergent sequences. The method in this paper overcomes the first, and often also the second, drawback.
Vibrational Analysis of Thionylimide and Its Isotopes
Authors: Kamaraj V. 
Published: September 2010

AbstractThe potential energy constants of HNSO, DNSO and H 15NSO have been evaluated using Cyvin's W‐matrix method employing the General Valence Force Field. Making use of these constants, the mean‐square amplitudes of vibration, the Coriolis coupling constants and centrifugal distortion constants have also been evaluated and presented here.
Elaboration de Matrices Organiques Photopolymerisables Par le Laser a Argon a 488 et a 514 NM Par Etude de la Polymerisation Des Monomeres Presents Par Spectroscopies IRTF et Uv‐Visible
Authors: Lalèque Nathalie , Giral Louis , Montginoul Claude , Schué FranÇOis , Sledz Joseph 
Published: September 2010

AbstractIn this work we determined the composition of organic matrix which were photopolymerisable at 488 and 514 nm using an argon Laser and which gave the best conversion degree of used monomers (bis‐GMA and teg‐DMA). At 488 nm, camphorquinone and N,N‐dimethylaminoethylmethacrylate (DAM) were respectively used as polymerisation initiator and accelerator. At 514 nm, this system being unable to induce monomer polymerisation, we showed that the use of eosin as photosensitizer, PDO as initiator and DAM or N‐methyldiethanolamine (MDEA) as accelerator were necessary to make the polymerisation possible.
Action de Divers Dienophiles Sur Quelques 2‐(3‐Indolyl)‐1,4‐Naphtoqui‐Nones‐N‐Substituees. Synthese D'une Nouvelle Serie de Naphto‐[2,3‐c]‐Carbazole‐5,13‐Quinones
Authors: Lion Claude , Hocquaux Michel , Amouzegh Patricia , Philippe Michel , Henrion Jean‐Christophe , Caron Emmanuelle , Briand Sylvette 
Published: September 2010

AbstractAddition of an N‐substituted indole without any substitution in the 2 and 3 positions to 1,4‐naphtoquinone leads to the expected, 2‐(3‐indolyl)‐1,4‐naphtoquinone. The latter reacts with some dienophiles via a Diels ‐ Alder reaction and gives new N‐substituted naphto‐[2,3‐C]‐carbazole‐5‐13‐quinones.
Crystal Structure of 4‐(Bromomethyl)‐5,5‐Dimethyl‐1,3‐Dioxaspiro[5.5]Undec‐2‐One
Authors: Feneau‐Dupont J. , Declercq J. P. , Patiny L. 
Published: September 2010

AbstractC12H19BrO3, Mr = 291.18, monoclinic, P21/a, a = 12.063(4), b = 19.751(4), c = 12.300(3)Å, β = 115.86(3), V = 2637(1)Å3, Z = 8, Dx = 1.48g.cm−3, MoKα radiation (λ = 0.71069Å). The final R indice is 0.11 for 1641 observed reflections.
Diphenylacetylene from the Base‐Catalyzed Fragmentation of 3,6‐Dihydro‐5,6‐Diphenyl‐3‐Tosyl‐1,3,4‐Oxadiazin‐2‐One
Authors: Allen Aberdeen , Anselme Jean‐Pierre 
Published: September 2010

AbstractTreatment of 3,6‐dihydro‐5,6‐diphenyl‐3‐tosyl‐1,3,4‐oxadiazin‐2‐one with sodium hydride in THF affords diphenylacetylene in better than 70% yield.