bluuebunny/crossref_metadata_2025_split huggingface dataset:
Über Reaktionen von 3-trifluormethylphenylsubstituierten silicium-und zinnorganischen Verbindungen / Reactions of 3-Trifluoromethylphenyl Substituted Silicon and Tin Organic Compounds
Authors: Roesky Herbert W. , Ambrosius Klaus 
Published: February 2015

Abstract
Several routes were investigated for the preparation of 3-CF3C6H4N[Si(CH3)3]2 2 and 3-CF3C6H4N[Sn(CH3)3]2 3. The latter compound reacts with 3-CF3C6H4NCO to yield [3-CF3C6H4(CH3)3SnN]2CO 4. A substituted urea 5 is also formed from [(CH3)3Si]2NCH3 and 3-CF3C6H4NCO. 5 is used for the preparation of cyclic compounds, with S2Cl2 the ten-membered ring (3-CF3C6H4NCONCH3S2)2 6 is formed. 5 and HN(SO2Cl)2 yield the six-membered ring 3-CF3C6H4NCONCH3(SO2)2NH 7. SeOCl2 and 5 react under formation of a spiro compound (S-CF3C6H4NCONCH3)2Se 8. The compounds were characterized on the basis of mass and 19F NMR spectra.
Neue ternäre Erdalkaliverbindungen des Arsens mit Mangan / New Ternary Alkaline Earth Compounds of Arsenic with Manganese
Authors: Brechtel Erwin , Cordier Gerhard , Schäfer Herbert 
Published: February 2015

Abstract
The new compounds CaMn2As2, SrMn2As2 and BaMn2As2 have been prepared and their structures determined. The crystallographic data are (pm):
CaMn2As2:
P3̄m 1, a = 423 ± 1, c = 703 ± 1, c/a = 1.66
SrMri2As2:
P3̄m 1, a = 429±1, c = 732 ± 1, c/a = 1.70
BaMn2As2:
I4/mmm, a = 415 ± 2, c = 1347 ± 2, c/a = 3.24
Substituenteneffekte und Störung von π-Systemen, XXXV Radikalanionen Zinn-substituierter Naphthaline/ Substituent Effects and Perturbation of n Systems, XXXV Radical Anions of Tin-Substituted Naphthalenes
Authors: Bock Hans , Kaim Wolfgang , Tesmann Holger 
Published: February 2015

Abstract
Novel radical anions of trimethylstannyl substituted naphthalenes and their ESR spectra are reported. Both 119 Sn and 117 Sn coupling can be assigned unequivocally. The perturbation of π systems by R3X substituents of group IV b elements X = C, Si, Ge, Sn and Pb is discussed with respect to photoelectron ionization potentials, charge transfer excitations, half-wave reduction potentials and ESR spin distribution.
Optisch aktive Übergangsmetall-Komplexe, LIX (+)436- und (—)436-C5H5Fe(CO)(COCH3)Pø2R*. Das Gleichgewicht C5H5Fe(CO)2CH3 + PR3 ⇄ C5H5Fe(CO)(COCH3)PR3
Authors: Brunner Henri , Vogt Heinz 
Published: February 2015

Abstract
The pair of diastereoisomers (+)436-and (-)436-C5H5Fe(CO)(COCH3)PØ2R*, with PØ2R* = (S)-(+)-(C6H5)2PN(CH3)CH(CH3)(C6H5), can be separated into its components by preparative liquid chromatography under pressure. On heating (+)436-C5H5Fe(CO)-(COCH3)PØ2R* equilibrates with C5H5Fe(CO)2CH3 and PØ2R* before epimerization at the Fe atom takes place. In the same way, the equilibrium C5H5Fe(CO)(COCH3)P(C6H5)3 ⇄ C5H5Fe(CO)2CH3 + P(C6H5)3 can be obtained starting from either side. It is shown that the decarbonylation C5H5Fe(CO)(COCH3)P(C6H5)3 → C5H5Fe(CO)(CH3)P(C6H5)3 + CO is not a thermal but a photochemical reaction.
Das Radikal Cp(CO)3Cr in Lösung/The Radical Cp(CO)3Cr in Solution
Authors: Madach Thomas , Vahrenkamp Heinrich 
Published: February 2015

Abstract
The monomeric complex Cp(CO)3Cr (2) is formed in benzonitrile solution by electrochemical oxidation of the anion Cp(CO)3Cr- (3) or by dissolution of the parent dimer Cp(CO)3Cr-Cr(CO)3Cp (1). Its existence is obvious from electrochemical and ESR data which together with the IR and NMR spectra indicate that in this solution the dimer 1 is in a rapid equilibrium with about 1% of the monomer 2.
Beiträge zur Chemie des Bors, XCIX Borylphosphin-Metallcarbonyle der VI. Nebengruppe /Contributions to the Chemistry of Boron, XCIX Borylphosphine Metal Carbonyls of Group VI Transition Metals
Authors: Nöth Heinrich , Sze Siu Ning 
Published: February 2015

Abstract
The following new types of coordination compounds were prepared by direct and indirect methods: (CO)5M · PR2-B(NR2), cis(CO)4M · (PR2)2BNR2′, cis-(CO)4M · (PR2BNR2′) and (CO)4MO · (R2P)2B(R2P)2B(PR2)2 · Mo(CO)4 (M = Cr, Mo, W). It was assumed that an increased metal-boron interaction would result in the series (CO5M · R2PBR2
′, (CO)4M(R2P)2BR′, (CO)3M(R2P)3B. However, no firm conclusion on this point is possible from the spectroscopic data obtained.
Darstellung und Eigenschaften von Dihydrogensulfido-, Dihydrogenselenido-und Dinatriumsulfido-Komplexen von Palladium(II) und Platin(II) /Synthesis and Properties of Di-hydrogensulfido, Di-hydrogenselenido and Di-sodiumsulfido Complexes of Palladium(II) and Platinum(II)
Authors: Schmidt Max , Hoffmann Gerhard G. 
Published: February 2015

Abstract
Dichloro-bis(triphenylphosphine)platinum(II) (2) and Dichloro-1,2-bis(diphenylphosphine)ethane-palladium(II) (3) do react with hydrogensulfide and sodiumsulfide under formation of the corresponding compounds Di-hydrogensulfido-1,2-bis(diphenylphos-phine)ethane-palladium(II) (4), Disodiumsulfido-1,2-bis(diphenylphosphine)ethane-palladium(II) (7), Di-hydrogensulfido-bis(triphenylphosphine)platinum(II) (1) and Di-sodium-sulfido-bis(triphenylphosphine)platinum(II) (8). 2 and 3 react with sodiumhydrogen-selenide under formation of Di-hydrogenselenido-1,2-bis(diphenylphosphine)ethane-palladium(II) (5) and Di-hydrogenselenido-bis(triphenylphosphine)platinum(II) (6). IR and 1H NMR spectra are reported.
N2H4-Koordination an Eisen-Schwefel-Zentren: Synthese und Struktur von [N(C4H9)4]2[μ-N2H4{Fe(S2C6H4)2}2]/N2H4Coordination on Iron Sulfur Centres: Synthesis and Structure of [N(C4H9)4]2[μ-N2H4{Fe(S2C6H4)2}2]
Authors: Sellmann  , Kreutzer Peter , Huttner Gottfried , Frank Albin 
Published: February 2015

Abstract
The reactions of N2H4 and N2H4 · H2O respectively, with [N(C4H9)4][Fe(S2C6H4)2] are investigated. With N2H4 · H2O the complex salt [N(C4H9)4]2[μ-N2H4{Fe(S2C6H4)2}2] is obtained, the first hydrazine complex of a dithiolato transition metal system, which can be fully characterized. The structure shows, that the compound consists of discrete cations and anions; in the centrosymmetrical anions two [FeS4] centres are bridged by a hydrazine ligand with Fe-N distances of 224 pm, N-N distances of 142 pm and Fe-N-N angles of 116.1°. The iron atoms are square pyramidally configurated and located 35 pm above the plane determined by the S atoms.
Azido- und Isocyanato-trichloro-borat und -aluminat / Azido and Isocyanato Trichloro Borate and Aluminate
Authors: Chow Lyonel , Schmock Fritjof , Müller Ulrich 
Published: February 2015

Abstract
N(CH3)4[BCl3N3], N(CH3)4[AlCl3N3], K[BCl3NCO] and K[AlCl3NCO] were prepared from N(CH3)4N3 and KNCO with BCl3 and AlCl3 using liquid SO2 as solvent. It is essential to avoid any excess of the halide in order to supress secondary reactions. The IR spectra show the NCO group to be bonded via its nitrogen atom.
Automatische Erzeugung pericyclischer Reaktionen/Automatic Generation of Pericyclic Reactions
Authors: Gasteiger Johann 
Published: February 2015

Abstract
A formal concept for the treatment of the bond and electron shifts in pericyclic reactions is developed. A new data structure for the representation of molecules allows the design of efficient algorithms. This resulted in a computer program for the exhaustive generation of pericyclic reactions.
Enhydrazine, XXV Einige Derivate des 1-Dimethylamino-2(1H)-chinolinons/Enehydrazines, XXV Some Derivatives of 1-Dimethylamino-2(1 H)-quinolinone
Authors: Wolf Ulrich , Sucrow Wolfgang , Vetter Hans-Jürgen 
Published: February 2015

Abstract
Reaction of the N,N-dimethyl enehydrazines 1 a-c with acetylene carboxylates gives the 1-dimethylamino-7,8-dihydro-2,5(1H,6H)-quinolinediones 5a and 6a-c together with some by-products of the enehydrazine (2a, 3a, 4a) and 4,5,6,7-tetrahydro-1H-indol-4-one type (7a-c). Compounds 6b and 6c have been degraded to the fully aromatic 1-dimethylamino- 2(1H)-quinolinones 12 b and 12 c.
Bakterieninhaltsstoffe, III 3-Alkyl-tetrahydrochinolinderivate aus Pseudomonas / Bacterial Constituents, III 3-Alkyl-tetrahydroquinoline Derivatives from Pseudomonas
Authors: Neuenhaus W. , Budzikiewicz H. , Korth H. , Pulverer G. 
Published: February 2015

Abstract
3-n-Heptyl- and 3-n-nonyl-3-hydroxy-1, 2, 3, 4-tetrahydroquinoline-2,4-dione have been isolated from the culture medium of Pseudomonas aeruginosa. Their structures have been elucidated.
The 185 nm Photolysis of 1,4-Dioxane in the Liquid Phase
Authors: Schuchmann Heinz-Peter , Bandmann Heinz , Sonntag Clemens von 
Published: February 2015

Abstract
The main products in the 185 nm photolysis of neat 1,4-dioxane are formaldehyde (Φ = 0.25), glycol monovinyl ether (0.17), and ethylene (0.15). Some hydrogen (0.04), carbon monoxide (0.01), acetaldehyde (0.03), oxetane (0.04), and bidioxanyl (0.01) are also formed. On N2O-saturation, the quantum yields of these products are diminished by about 30%, and N2 (0.59) and hydroxydioxane (0.4) become the main products. They are thought to be formed in the reaction sequence

In aqueous dioxane, photoionisation is possible due to a greater lowering of the ionisation threshold. In dioxane/water 20:80 the main products are H2 (0.50) and bidioxanyl (0.45), most likely formed in consequence of
Chemistry of Alkoxo Complexes, Part III *Synthesis and Characterization of Some Mono(carboxylato)mono (alkoxo)nickel(II) Complexes
Authors: Baranwal B. P. , Parashar G. K. , Mehrotra R. C. 
Published: February 2015

Abstract
A number of mono(carboxylato)mono(alkoxo)nickel(II) complexes of the general formula, Ni(OR)(OOCR′), (with R′ = C13H27, C15H35 and C17H35) have been synthesized (where R = Me and Pri) by the reactions of nickel methoxide and isopropoxide with the respective carboxylic acids in equimolar ratio and (where R = Et and But) by alcohol interchange reactions. A study of the molecular weight, infra-red and electronic reflectance spectra and magnetic susceptibility in addition to elemental analyses has been carried out to throw some light on the probable structure of these derivatives.
Derivatives of cis-NPCl2(NSOCl)2 and (NPCl2)2NSOCl, Part XII [1] Triphenylphosphazenyl Derivatives of NPCl2(NSOX)2 and (NPCl2)2NSOX with X = F, Cl or Ph
Authors: Jekel A. P. , Grampel J. C. van de 
Published: February 2015

Abstract
Reaction of the ring systems NPCl2(NSOX)2 and (NPCl2)2NSOX (X = F, Cl, Ph) with HNPPh3 in molar ratio 1:2 gives their mono(tripbenylphosphazenyl) derivatives. The compound NPCl(NPPh3)(NSOPh)2 forms a stable 1:1 adduct with acetonitrile. All compounds are characterized by NMR (31P, 19F), IR and mass spectra.
Eine unerwartet einfache Synthese von Dimethylphosphin / An Unexpectedly Simple Synthesis of Dimethyl Phosphine
Authors: Trenkle Armin , Vahrenkamp Heinrich 
Published: February 2015

Abstract
The desulfuration of Me2P(S)P(S)Me2 by tri-n-butyl phosphine in the presence of protic substances (water, alcohols, carbonic acids and others) is accompanied by hydrolytic cleavage of the P-P bond with formation of dimethyl phosphine.
Chinolizine und Indolizine, XII [1]. Zur Reaktion von Pyrophthalon mit reaktiven Malonsäurederivaten / Quinolizines and Indolizines, XII [1]. Reaction of Pyrophthalone with Reactive Malonyl Derivatives
Authors: Kappe Thomas , Hariri Mehdi , Stadlbauer Wolfgang 
Published: February 2015

Abstract
The reaction of 2-(2′-pyridyl)-indan-1,3-dione (pyrophthalone, 1) with reactive malonic acid derivatives (2) yields the indanoquinolizinone derivative (5) by rearrangement of the instable zwitter-ionic compound 3 and decarboxylation of the seven-membered intermediate 4. In order to support this mechanism the lactone 15 was thermolyzed to give fluorenone (16) by decarboxylation.
Synthese und Additionsreaktionen von 1.3.2λ2.4-Diazaphosphoniaahiminatacyclobutanen [1] / Synthesis and Addition Reactions of 1,3,2λ2,4-Diazaphosphoniaaluminatacyclobutanes [1]
Authors: Niecke Edgar , Kröher Rainer 
Published: February 2015

Abstract
N-silylated aminoiminophosphines react with aluminium trihalides to give acyclic zwitterions having two-coordinated phosphorus. At about room temperature these adducts decompose by elimination of silylhalide and formation of 1,3,2λ2,4-diazaphosphonia-aluminatacyclobutanes. Reaction of halogens and alkyl halides with the cyclic zwitterions results in formation of the corresponding 1,1-addition products. With alkyl-azides one obtains bicyclic phosphorus nitrogen heterocycles whilst in the reaction with trimethyl-silylazide the isomeric monocyclic azide derivative is formed. The IR and NMR spectra of the cyclic zwitterions are briefly discussed.
Semiempirische SCF-Rechnungen zur Hydroxypyrimidin-Pyrimidon-Tautomerie / Semiempirical SCF-Calculations on the Hydroxypyrimidine-pyrimidone Tautomerism
Authors: Fabian Walter 
Published: February 2015

Abstract
The electronic spectra of a series of substituted 4-hydroxypyrimidines are calculated by the INDO/CI method. Best agreement with the experimental values is obtained when the geometry of the 4(3H)-pyrimidone form is used. Calculated total energies seem to be less suitable for determining tautomeric equilibria than a comparision between experimental and theoretical transition energies.
Zur Polymorphie des Na2S2O3 / On Polymorphism of Na2S2O3
Authors: Benda Heike von 
Published: February 2015

Abstract
Na2S2CO3 crystallizes in 4 modifications. The familiar monoclinic a-form stable at ambient temperature transforms into the trigonal β-form at 330 °C which at 388 °C converts to b ccy-Na2S2O3. These transformations are reversible. Unstable orthorhombic α'-Na2S2CO3(Pna21) is obtained by dehydration of the pentahydrate or by cooling the β-phase. The γ-phase decomposes in sealed ampoule to Na2SCO4 and NaS5; decomposition is slow below and rapid above 440 °C. Equilibrium displacement by distillation of sulphur accelerates decomposition even for β-Na2S2O3, and maintaining low sulphur pressure by pumping gives Na2SO3. β- and γ-Na2S2CO3 are superionic conductors; a dynamic model is presented for the β-structure with Na+ conduction pathways originating from oscillation of the S2O3
2- tetrahedra. Structural relationships can be derived with respect to the arrangement of the thiosulphate groups.
Solvent Extraction Study of Mercury(II) with Zolon Red (HZR)
Authors: Patel A. N. , Qureshi A. M. 
Published: February 2015

Abstract
Zolon Red, Mercury(II) The extraction of mercury(II) from the aqueous solutions of mercury(II) nitrate and mercury(II) chloride with zolon red (HZR) dissolved in w-butanol has been studied. The extraction of mercury (II) from the aqueous nitrate system has been found to be much better compared to that from the aqueous chloride system in the pH range of 1 to 6. The extraction of mercury with zolon red is simple, fast and selective. The composition of the extracted mercury zolon red compound has also been studied. Regeneration of the extracting solution of zolon red is readily achieved by stripping the mercury(II) with an aqueous cyanide solution.
Compounds of Complex Halo and Pseudohalo Acids of the Group II B Metals, Part I Etherate, Pyridine and Aniline Compounds of Zn(II)
Authors: Galinos A. G. , Kouinis J. K . , Ioannou P. V. , Zafiropoulos Th. F . , Perlepes S. P. 
Published: February 2015

The preparation of sixteen new etherate, pyridine and aniline compounds of complex halo and pseudohalo acids of Zn(II) is reported.
The study of some physical and chemical properties as well as the UV and IR spectra of these compounds are discussed. Tetrahedral structures are proposed for all compounds in the solid state
121Sb - Mößbauer- Spektren von mixed-valence-Verbindungen des Typs (RH+)8(Cl)4SbCl6
3-SbCl6
- / 121Sb Mössbauer Spectra of Mixed Valence Compounds of the Structure (RH+)8(Cl-)4SbCl6
3-SbCl6
-
Authors: Dietrich W. , Eisinger H. K. , Latscha H. P. , Pebler J. , Schmidt K. 
Published: February 2015

Abstract
The 121Sb Mössbauer spectra of the mixed valence compounds (RH+)8(Cl-)4SbCl6
3-SbCl6
-with R equal CH3CH(NH2)CH3 (1), CH3CH(NH2)CH2CH3 (2) are reported and the results are discussed.
Zur Darstellung und Struktur von CaMnBi2 / On the Preparation and Crystal Structure of CaMnBi2
Authors: Brechtel Erwin , Cordier Gerhard , Schäfer Herbert 
Published: February 2015

Abstract
The new compound CaMnBi2 has been analytically and structurally characterized. CaMnBi2 crystallizes in the tetragonal system (a = 450 ± 1 pm, c = 1108 ± 2 pm, space group P4/nmm). Mn and Bi atoms form fourfold pyramids, connected by common edges in the basis to two-dimensional sheets. These sheets are separated by double layers of Ca atoms between which further Bi atoms are located forming squarenets. The structure is strongly related to that of SrZnSb2 which can be interpreted as a distorted variant of the new CaMnBi2 type.
Charge Distribution and Structures of Halogenogallates and Halogenoaluminates of the Type MeIMeIIIX4, MeIMe2
IIIX7, and C6H6 CUAlCl4. An NQR Investigation ( 35Cl, 79Br, 127I, 63Cu, 69Ga)
Authors: Fichtner Winfried , Weiss Alarich 
Published: February 2015

Abstract
In polycrystalline samples of the halogenoaluminates MeIAlCl4 (MeI - Cu, Ag), CuAlBr4, C6H6 · CUAlCl4 and halogenogallates CuGaCl4, MeIGaBr4 (MeI = Cu, Na, K, NH4, Rb, Cs, Ga), MeIGaI4 (MeI = Cu, Cs), MeIGa2Br7 (MeI = K, NH4, Rb, Cs), CsGa2I7, the halogen, MeIII , and Cu-NQR spectra were studied, partly as a function of temperature. Phase transformations are found in NH4GaBr4, CsGaBr4, and RbGa2Br7. The spectroscopic results are discussed and a charge distribution analysis is given, based on the Townes-Dailey theory. Symmetry properties of the solids are pointed out in connection with multiplicity and intensity ratios of the NQR spectra.
NMR-Spektroskopie an paramagnetischen Komplexen, XX [1]. Störung der 13C-und 1H-Spektren dia-und paramagnetischer Moleküle durch radikalische Metallocene / NMR Spectroscopy on Paramagnetic Complexes, XX [1]. Errors in the 13C and 1H Spectra of Dia-and Paramagnetic Molecules Introduced by Metallocene Radicals
Authors: Köhler Frank H. 
Published: February 2015

Abstract

13C and 1H NMR spectra of ethyl and t-butyl substituted cobaltocenes dissolved in toluene, benzene and acetone are strongly dependent on concentration and temperature. With increasing metallocene concentration and decreasing temperature almost all 13C and 1H signals of the metallocenes as well as those of the solvents are shifted high field to a different degree. The additional shift is most pronounced for substituted aromatic ring carbons giving rise to a seriously disturbed signal ordering. Similar behavior is found for substituted vanadocenes and nickelocenes dissolved in toluene or THF. The effect is attributed to preferred mutual orientation of metallocene and solvent molecules thus inducing additional shifts in the metallocene themselves and in the solvent. From the results it is concluded that neither dipolar nor Fermi contact interaction can satisfactorily account for the effect. Instead it originates from susceptibility shifts which may not be ruled out by internal referencing and which are due to anisotropy and orientation of the molecules. For consequence quantitative comparison of paramagnetic NMR shifts from highly anisotropic molecules is only meaningful if concentrations are known. Measurement of magnetic moments may lead to errors.
Photoisomerisierung von trans-1-(3.5-Di-tert-butyl-4-hydroxyplienyl)-2-phenyldiazen / Photoisomerization of trans-1-(3,5-Di-tert-butyl-4-hydroxyphenyl)-2-phenyldiazene
Authors: Hofer Edgar 
Published: February 2015

Abstract
Light induced isomerizations of the title compound have been studied. The thermal cis-trans isomerization 3→1 occurs via the tautomeric quinonephenylhydrazone (2) as shown by 1H NMR, spectroscopy. The influence of solvent on the thermal cis-trans isomerization is discussed. 1H NMR data of 1, 2 and 3 are given. Values of the tautomeric equilibrium 1⇋2 are determined for various solvents and different temperatures.
Structure Determination of 3,5-Biscyclohexylidene-1,2,4-trithiolane / Structure Determination of 3,5-Biscyclohexylidene-1,2,4-trithiolane
Authors: Winter Werner , Bühl Hanspeter , Meier Herbert 
Published: February 2015

Abstract
Fragmentation of 1,2,3-thiadiazoles (1) leads to the compounds 5 - 8 with an increasing proportion of sulphur. Numerous structural possibilities exist for the products 7 with the general formula (R2C2)2S3. The number of proposals can be reduced by spectroscopic techniques, but the final structure determination is accomplished by an X-ray analysis of the title compound 7a. 7a crystallizes in the space group P21/c (Z = 4) with cell parameters of a = 9.714(1), b = 16.188(8), c = 9.149(2) Å and β = 98.93(1)°. The structure is solved by direct methods and refined to R = 0.053 with 1955 diffractometer data (I ≥ 2σ(I)). The trithiolane ring has a puckered conformation and the whole molecule shows nearly perfect C2-symmetry, which is not required crystallographically.
The Electronic Structure and the He(I) Photoelectron Spectrum of Tricarbonylcyclooctatetraene-iron [1]
Authors: Böhm Michael C. , Gleiter Rolf 
Published: February 2015

Abstract
The highest occupied molecular orbitals of tricarbonylcyclooctatetraene-iron (1) have been derived from those of tricarbonyl-butadiene-iron and butadiene. Based on this MO diagram and an INDO-type calculation the He(I) photoelectron (PE) spectrum of 1 could be interpreted. Using the ⊿ SCF and the transition operator method (TOM) the first five bands of the PE spectrum of 1 could be assigned.
Kinetische Analyse zur Umwandlung von Oxirenen oder Thiirenen und ihren offenkettigen Valenzisomeren / Kinetic Analysis for the Conversion of Oxirenes or Thiirenes and their Open-Chain Valence Isomers
Authors: Meier Herbert , Kolshorn Heinz 
Published: February 2015

Abstract
Ring closure and ring opening reactions possess an outstanding significance for the formation and reactivity of antiaromatic heterocycles like oxirenes and thiirenes. The valence isomerisations 2 ⇆ 1 ⇆ 2' can be controlled by the product distribution 2 → P/2' → P'. A quantitative interpretation of many experimental data, published in the last years, is given on the basis of a few kinetic models, which consider thermal and photochemical pathways. Possible energy profiles of single hypersurfaces (S0 or S1) and the transition between different hypersurfaces (S1 → S0) are the most important features of these models.
Some Extensions of von Braun (BrCN) Reaction on Organic Bases
Authors: Siddiqui Salimuzzaman , Siddiqui Bina S. 
Published: February 2015

Abstract
von Braun Cyanogen Bromide Reaction Some extensions of von Braun cyanogen bromide reaction have been undertaken on conessine, isoconessine and two simpler bases, dimethyl a-naphthyl amine and diethyl amine. The monocyanamides of conessine and isoconessine yielded acid amides, amino-derivatives (diamines) and guanido derivatives on careful hydrolysis, reduction and treat-ment with ammonia, respectively. The simpler bases also formed the acid amides and dia-mines but failed to give the guanido derivatives under the conditions employed for conessine series. Diamines of all these bases yielded carbinol amines on reaction with nitrous acid.
Chemisches Verhalten des Siliziumoxidfluorids F3SiOSiF3 / Chemical Behaviour of the Silicon Oxide Fluoride F3SiOSiF3
Authors: Jacob Eberhard 
Published: February 2015

The stability of (SiF3)2O and the chemical behaviour with HF and CsF has been described. The reactivity of hexafluorodisiloxane with various strongly oxidizing fluorides (XeF6, XeF4, XeF2, KrF2, IF7, BrF5, ClF5, ClF3, ClF, UF6) and oxide fluorides (XeOF4, ClO2F) was investigated, particularly with respect to the preparation of oxide fluorides such
XeF6 + (SiF3)2O → XeOF4 + 2 SiF4(I)
in comparison to hydrolysis reactions with H2O or SiO2/HF. In summary, all the studied compound react more slowly with (SiF3)2O than with H2O. The reaction (1) can be recommended as a safe procedure to prepare XeOF4. By heating a mixture of UF6 and (SiF3)2O uranium oxide fluorides are obtained. With β-UV irradiation was observed. It is remarkable that many of the investigated fluorides and fluorine oxidize the (SiF3)2O to oxygen. (SiFa3)2O shows no reaction with HF. IF7 catalyzes only the decomposition of (SiF3)2O.