bluuebunny/crossref_metadata_2025_split huggingface dataset:
The Comparative Photochemical Behaviour of Dibenzenechromium and Benzenetricarbonyl Chromium
Authors: Gilbert Andrew , Kelly John M. , Budzwait Marion , Von Gustorf Ernst Koerner 
Published: March 2015

In comparison with (C6H6)Cr(CO)3, (C6H6)2Cr is relatively light stable. The major part of the light energy absorbed by (C6H6)2Cr leads neither to its decomposition or ligand exchange, nor can it be transferred to common low energy triplet acceptors. Internal dissipation of energy, either by rapid conversion to the ground state or by rapid reversible isomerization, must be an important process.
In the case of (C6H6)Cr(CO)3, the main pathway to the previously reported lightinduced exchange of benzene involves an intermediate which is suggested to be (benzene)-dicarbonylchromium (1) and not a one-step dissociation of the excited molecule, to give Cr(CO)3 and benzene1b: 1 is also of major importance for the exchange of CO.
Polarisations-absorptionsspektrometrische Untersuchungen zur elektronischen und geometrischen Struktur der Oktacyanokomplexe des Molybdäns und Wolframs, I Das Mo(CN)8 -Ion in K4Mo(CN)8 · 2 H2O / Polarization-Absorption Spectrometric Studies of the Electronic and Geometrical Structure of the Octacyano Complexes of Molybdenum and Tungsten, I The Mo(CN)8 Ion in K4Mo(CN)8 · 2 H2O
Authors: Morys P. , Gliemann G. 
Published: March 2015

Polarized absorption spectra of the ions Mo(CN)8
4- and W(CN)8
4- were measured on single crystals of the compounds K4Mo(CN)8 · 2 H2O and K4W(CN)8 · 2 H2O over the spectral region 10-47 kK and at temperatures from 300°K to 4.2°K. The results obtained were interpreted on the basis of the ligand field theory.
According to their d → d-spectrum, these complex ions in the crystalline state have a quasi-dodecahedral coordination structure with the exact symmetry D2. The deviation from the ideal dodecahedral structure is appreciably smaller at low temperatures than at room temperature.
Contrary to the results of earlier X-ray structure determinations, the only space group which can be assigned to the crystals of K4Mo(CN)8 · 2 H2O and K4W(CN)8 · 2 H2O is C9
2v.
Darstellung, Infrarotspektren und Strukturen einiger dimerer und polymerer Oxochloro- und Oxooxalato-isothiocyanato-Komplexe des Molybdän(V).
Authors: Mattes Rainer , Altmeppen Dirk , Fetzer Manfred 
Published: March 2015

The crystal structure of (PyH)2(Mo2O4Cl4) · 3 H2O, earlier formulated as tetrameric di-μ-oxo-bis(di-µ-oxo-oxotetrachloroaquodimolybdate(V)), [(PyH)4][Mo4O8Cl8(H2O)2], has been determined. The structure consists of the dimeric anions [Mo2O4Cl4]2- with strong Mo=O ••• Mo interactions along the short c axes (c = 4.11 Å). The polymeric
[N(CH3)4]2[Mo2O3(C2O4)(NCS)4] and the dimeric [(PyH)4][Mo2O3(C2O4)2(NCS)4]
have been synthetized and characterized by infrared spectra and magnetic properties.
Notizen: Ternäre Verbindungen in den Dreistoffsystemen Lithium(Natrium)-Beryllium-Arsen. / Ternary Compounds in the System Lithium(Sodium)-Beryllium-Arsenic
Authors: Schuster Hans-Uwe , Tiburtius Christoph 
Published: March 2015

By investigations in the system
Li(Na)-Be-As
we found two new phases of the formula LiBeAs and NaBeAs which crystallize in a tetragonal resp. hexagonal structure
Photolysis (A = 185 nm) of Liquid Acetaldehyde Dimethyl Acetal
Authors: Schuchmann Heinz-Peter , Von Sonntag Clemens 
Published: March 2015

Deaerated liquid acetaldehyde dimethyl acetal has been photolyzed at λ = 185 nm, and 28 products have been determined. The major ones with their quantum yields are: methanol (0.59), methane (0.26), ethyl methyl ether (0.17), methyl vinyl ether (0.16), methyl formate (0.14), ketene dimethyl acetal (0.1), ethane (0.06), hydrogen (0.06), and acetaldehyde (0.06).
The major primary processes are suggested to be the scission of the C-OCH3 bonds (homolytic and molecular) and of the O-CH3 bonds (homolytic). Minor processes are hydrogen elimination reactions and the scission of the C-CH3 bond.
Zur Synthese von phosphorhaltigen Heterocyclen mit metallorganischen Verbindungen / Synthesis of Phosphorus Containing Heterocycles with Metal Organic Compounds
Authors: Roesky Herbert W. , Zamankhan Hamid 
Published: March 2015

CH3P(S)(NCO)2 reacts with [(CH3)3Si]2N-CH3, [(CH3)3SiNCH3]2CO and [(CH3)3Sn]3N to give the cyclic compounds 2a-2c. The structures are discussed on the basis of NMR and IR data. In 2 a and 2 b the (CH3)3Si-groups are easily and quantitatively replaced by protons with water under formation of (CH3)3Si-O-Si(CH3)3. By the reaction of CH3P(S)(NCO)2 with [(CH3)3Si]2S 4 is obtained, a cyclic compound with a sulfur atom of coordination number 2.
FP(S)(NCS)2 was used to investigate the scope of these reactions. With [(CH3)3Si]2NCH3 and FP(S)(NCS)2 5 is obtained, which reacts with S2Cl2 to yield 6, a bridged disulfur compound. This method may be useful for the systematic investigation of new cyclic compounds.
Preparation of Spin-Labeled Phosphoroamidates in High Yield Using Imidazole as the Transfer Agent
Authors: Sosnovsky G. , Konieczny M. 
Published: March 2015

The spin-labeled (1-oxyl-2,2,6,6-tetramethyl-4-piperidyl)-phenyl imidazole-1-phosphonate (4) was used to prepare (1-oxyl-2,2,6,6-tetramethyl-4-piperidyl)phenyl N-alkyl and N-aryl phosphoroamidates (8) in yields generally exceeding 70%.
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Amidates 8 were also prepared from the corresponding chloridate 10. However, in the latter case, a basic condensing agent, such as, triethylamine was essential. The chloridate 10 was converted to the spin-labeled pyrophosphate 11 and the acid 12.
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The pyrophosphate 11 can be employed to phosphorylatively spin-label amines.
Darstellung und Kristallstruktur von BaMnSb2, SrMnBi2 und BaMnBi2 / Preparation and Crystal Structure of BaMnSb2, SrMnBi2 and BaMnBi2
Authors: Cordier Gerhard , Schäfer Herbert 
Published: March 2015

BaMnSb2, SrMnBi2 and BaMnBi2 have been prepared and structurally characterized. The new compounds are isotypic and crystallize tetragonal in the SrZnBi2 structure with the following constants:
BaMnSb2: a = 4.53 ± 0.01 Å, c = 24.34 ± 0.03 Å, c/a = 5.37.
SrMnBi2: a = 4.58 ± 0.01 Å, c = 23.13 ± 0.03 Å, c/a = 5.05.
BaMnBi2: a = 4.63 ± 0.02 Å, c = 24.22 ± 0.05 Å, c/a = 5.23.
The transition metal atoms form together with the semimetal atoms sheets of tetragonal pyramids separated by double layers of alkali earth atoms. In these double layers there are inserted Bi/Sb-square nets.
Darstellung von Heteropolymolybdaten in organischen Lösungsmitteln / Preparation of Heteropolymolybdates in Organic Solvents
Authors: Fuchs Joachim , Brüdgam Irene 
Published: March 2015

Heteropolymolybdates are obtainable from nonaqueous solutions. They are formed by reaction of molybdates or isopolymolybdates soluble in organic solvents with oxo acids or metal salts.
Compounds with the anions TeMo6O24
6-, MIIIMo6O24H6
3- (MIII = Fe, Al, Cr), ΜIIMo6O24Η6
4- (MII = Zn, Cu, Co, Ni), PMo12O40
3-, as well as the novel heteropolyanion Ρ2Mo4O19
4- were obtained.
The IR and Raman spectra are discussed.
Notizen: Darstellung des Benzolmangantricarbonyl-Kations aus Methylcyclopentadienylmangantricarbonyl / Preparation of Cationic Benzene-manganese-tricarbonyl from Methylcyclopentadienyl-manganese-tricarbonyl
Authors: Bachmann Paul , Repp Karl-Rudolf , Singer Hellmut 
Published: March 2015

Exchange of the cyclopentadienyl ligand from methylcyclopentadienyl-manganese-tricarbonyl by benzene, toluene, xylene, mesitylene and other aromatics with AlBr3 as catalyst gives cationic aromatic manganesetricarbonyl complexes. The amount of AlBr3 and the addition of aqueous HBr do not only influence the yield but also the purity of the products. With this new method
C6H6Mn(CO)3+
can be prepared in high yield from a relatively inexpensive starting material.
Ein Beitrag zur Kristallchemie dreiwertiger Seltenerdoxide Zur Stabilisierung der monoklinen B-Form / About the Crystal Chemistry of Three-Valent Rare Earth Oxides The Stabilisation of the Monoclinic B-Modification
Authors: Muschick W. , Müller-Buschbaum Hk. 
Published: March 2015

Single crystals of 1—x Ho2O3 : xCaO (x = 0.07), CaHoO2.5 (A) and Ca0.5Ho1.5O2.75 (B) were prepared by high temperature reaction and investigated with X-ray single crystal data. It can be shown that small amounts of CaO stabilize the monoclinic B-Typ of rare earth oxides. Phase (A) and (B) cannot be seen as a stabilized B-type crystal because they have an new crystal structure with space group
C2
2h–P 21/m, a = 656.6, b = 356.7, c = 529.4 pm, β = 92.3°; a = 650.2, b = 352.4, c = 584.5, β = 92.3°.
Kombinierte 3.3- und 3.4-Addition an ein 1.2.4.3λ3-Triazaphosphol zu Tricyclophosphoranen / Combined 3,3- and 3,4-Addition to a 1,2,4,3λ3-Triazaphosphole Yielding Tricyclic Phosphoranes
Authors: Schmidpeter Alfred , Junius Martina , Weinmaier Josef Helmut , Barrans Jean , Charbonnel Yves 
Published: March 2015

2-Methyl-5-phenyl-2H-1,2,4,3λ3-triazaphosphole, which does not lend itself to oxidative additions alone, reacts smoothly with o-heterodienyl-phenols yielding tricyclic phosphoranes. The reaction involves an initial addition of the phenolic end to the P=N bond and a subsequent fast intramolecular addition of the heterodiene moiety to the phosphorus.
The structure of the resulting phosphoranes is proposed to have all three fivemembered rings attached to the central trigonal bipyramidal phosphorus by one axial and one equatorial bond with the bond in common to the two condensed rings in axial position. NMR data back this proposal.
N-Chlorsilyl-triorganophosphinimine, Darstellung und Eigenschaften / N-Chlorosilyl Triorganophosphine Imines, Preparation and Properties
Authors: Wolfsberger Werner 
Published: March 2015

Abstract
A series of N-chlorosilyl triorganophosphine imines have been prepared by transsilylation reactions of the corresponding N-trimethylsilyl triorganophosphine imines with halosilanes. The new compounds were characterized by elemental analyses, molecular weight determinations, IR and 1H and 31P NMR spectra.
Tetraquecksilbermethane. Tetrakis(methylthioquecksilber)-methan C(HgSCH3)4 und µ-Dithiotetraquecksilbermethan CHg4S2; Synthesen und Schwingungsspektren / Tetramercurimethanes. Tetrakis(methylthiomercuri)methane C(HgSCH3)4 and µ-Dithiotetramercurimethane CHg4S2; Syntheses and Vibrational Spectra
Authors: Breitinger Dietrich , Morell Wilfred 
Published: March 2015

Abstract
Reactions of tetrakis(acetoxymercuri)methanes C(HgOOCCR3)4 (R = H, or F) in aqueous solutions with methylsulfane CH3SH, or sulfane H2S, yield tetrakis(methylthiomercuri)methane C(HgSCH3)4, and μ-dithiotetramercurimethane CHg4S2, respectively, both insoluble in common solvents and thermally remarkably stable. The central CHg4 groups of the starting materials have been preserved under the reaction conditions, thus tetrahedral entities C(HgS–)4 are common to both compounds. In the polymeric, amorphous CHg4S2 the CHg4 units are linked by sulfur bridges in a highly disordered manner, as is suggested by vibrational spectra. In other respects close similarities in the vibrational behaviour of these CHg4 fragments and of the isosteric NHg4 tetrahedra in tetramercurioammonium complexes have been observed.
Wideline 1H NMR Study on Hydrated Layered Sulfides K0.5(H2O)y[NbS2] and Na0.5(H2O)y[NbS2]
Authors: Lerf Anton , Burkert Paul , Besenhard Jürgen O. , Schöllhorn Robert 
Published: March 2015

Abstract
H NMR spectra of different hydration stages show that the water molecules in hydrated layered niobium sulfides A0.5(H2O)y[NbS2] are rather mobile at room temperature. A structural scheme of water arrangement in the interlayer space is proposed with the C2-axis of the H2O molecules parallel to the basal planes of the NbS2 layer units.
Transphosphorylative Spin-Labeling Utilizing Diimidazolides of Pentavalent Phosphorus
Authors: Sosnovsky George , Konieczny Maria 
Published: March 2015

Abstract
The reaction of the spin-labeled diimidazolide 1 with hydroxy and amino compounds was studied. Diimidazolide 1 was superior to the dichloridate 6 for the preparation of spinlabeled phosphates 3 and phosphorodiamidates 2. The spin-labeled phosphate 15 was synthesized through hydrolysis of 6. Spin-labeled cyclophosphoramidates (10-13), analogs of the cytotoxic Endoxan, were prepared by the reaction of 1 and 6 with the appropriate difunctional nucleophile. Inductive effects of substituents in the imidazolyl moiety on the transphosphorylation reaction were also studied.
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Reactions of Benzofuran Oxidation, Nitration and Bromination of 7-Hydroxy' and 7-Metboxy-benzofuran Derivatives
Authors: Abdel Rahmanand A.H. , Basha R.M. 
Published: March 2015

Abstract
Condensation of benzoin and pyrocatchol gave 7-hydroxy-2,3-diphenylbenzofuran (1a), which on oxidation yielded the quinone 3a whereas, its methyl ether 1b gave the benzophenone 2a on oxidation. Nitration of 1a and 1b led to the formation 4,6-dinitro- (1c) and 4-nitro (1h) derivatives,respectively, also bromination of 1a and 1b gave 4,6-dibromo- (1f) and 6 -bromo- (1j), respectively
Notizen: The Preparation and Structure of Lithium (R, S)-Ethylenediamine-N,N′-disuccinatocobaltate(III) Trihydrate
Authors: Pavelcík F. , Majer J. 
Published: March 2015

Abstract
Crystals of LiCo[(R,S)-EDDS] • 3 H2O have been synthetized and its structure was determined by X-ray analysis. Monoclinic, α = 9.624, b = 12.788, c = 12.049 Å, β = 94.85°, space group P21/c. The crystal consists of binuclear units Co2[(R,S)-EDDS]2
2-. The central ethylenediamine chelate ring has an envelope conformation.
Notizen: Ternäre Fluoride vom Typ AgLnF4 (Ln = Nd, Sm-Lu, Y) / Ternary Fluorides of the AgLnF4-Type (Ln = Nd, Sm-Lu, Y)
Authors: Lösch Roland , Hebecker Christoph 
Published: March 2015

Abstract
Single crystals of AgGdF4 have been investigated by X-ray methods. AgGdF4 is hexagonal (isostructural to NaNdF4) with a = 6.233, c = 3.599 Å, Z, = 3/2. Guinierphotographs give the same structure for AgLnF4-compounds with Ln = Nd, Sm-Ho. The other five (Ln = Er-Lu, Y) crystallize trigonal (isostructural to KErF4) in a superstructure variant of the CaF2-type (Z = 18).
Über die Reaktionen von K2 [Fe2(CO)8] mit Ph3SnCl und Ph2SnCl2 / On the Reactions of K2[Fe2(CO)8] with Ph3SnCl and Ph2SnCl2
Authors: Behrens Helmut , Moll Matthias , Sixtus Eduard , Sepp Erich 
Published: March 2015

Ph3Sn(OC)4Fe-Fe(CO)4SnPh3 and ClPh2Sn(OC)4Fe-Fe(CO)4SnPh2Cl are formed by the reactions of dipotassium octacarbonyl diferrate(-I) with Ph3SnCl and Ph2SnCl2:
K2[(OC)4Fe-Fe(CO)4] + 2 Ph3SnCl → Ph3Sn(OC)4Fe-Fe(CO)4SnPh3 + 2 KCl K2[(OC)4Fe-Fe(CO)4] + 2 Ph2SnCl2 → ClPh2Sn(OC)4Fe-Fe(CO)4SnPh2Cl + 2 KCl.
A Novel Approach to the Transformation of Aldoximes to Nitriles Utilizing Spin-Labeled Phosphoryl Imidazolides
Authors: Sosnovsky George , Konieczny Maria 
Published: March 2015

The spin-labeled imidazolides of phosphorus 1 and 3 were utilized for the conversion of
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aldoximes to nitriles in high yield. It is hypothesized that this transformation under mild, neutral conditions might serve as a model reaction, mimicking the detoxification of phosphorus-inhibited acetyl cholinesterases.
Die Oxidation von Phthalocyaninen: Darstellung und Charakterisierung von Lithiumphthalocyanin(1-) / The Oxidation of Phthalocyanines: Preparation and Characterisation of Lithiumphthalocyanine(1-)
Authors: Homborg Heinrich , Kalz Winfried 
Published: March 2015

Abstract
Lithiumphthalocyanine(1-), to date the most simple representative of radical phthalocyanine species, is prepared in nonpolar aprotic solvents by the chemical, electrochemical and photochemical oxidation of quarternary ammonium phthalocyanines(2-). The compound is characterized by its electronic and vibrational spectra.
The Mechanism of the Sorption of Monovalent Cations on Cobalt(II)-hexacyanoferrate(II)
Authors: Ćeranić T. , Trifunović D. , Adamović R. 
Published: March 2015

Abstract
Cobalt(II)-M-hexacyanoferrate(II), M = K, NH4, Cs, as synthetic sorbents have ion exchange properties selective for monovalent cations. They show a higher selectivity for the ions with larger crystal radius if the sorption takes place in dilute solutions, whereas in concentrated sulutions the selectivity sequence is reversed. The phenomenon is attributed to the differences in physico-chemical properties of the given pair of competing ions in the solution phase and to steric limitations in the phase of ion exchanger.
Darstellung von Cyclopentadienylvanadylidyntrikobaltenneacarbonyl / Preparation of Cyclopentadienyl-vanadyhdyne-tricobaltenneacarbonyl
Authors: Haustein Hans , Schwarzhans Karl 
Published: March 2015

Abstract
A new vanadium-cobaltcarbonyl-cluster, cyclopentadienyl-vanadylidyne-tricobaltennea-carbonyl, has been prepared and identified by IR and masspectrometric measurements.
Organoboron-Monosaccharides, XIV Routes to α-and β-D-Mannofuranosyl β-D-Mannofuranosides
Authors: Dahlhoff Wilhelm Volker , Geisheimer Angelika 
Published: March 2015

Abstract
Stereoselective glycosylations of 2,3:5,6-di-O-ethylboranediyl-α-D-mannofuranosyl bromide (1) by two independent routes involving 1-O-tri-n-butyl-stannyl and 1-O-triethylborate α-D-mannofuranosyl derivatives give α-D-mannofuranosyl /β-D-mannofuranoside (8a) after deprotection. β-D-Mannofuranosyl β-D-mannofuranosides can be prepared by reaction of 1 with the sodium triethylborate derivative of 2,3:5,6-di-O-isopropylidene-β-D-mannofuranose (11) and by reacting 1 with hexabutyldistannoxane. The latter approach allows the synthesis of β-D-mannofuranosyl β-D-mannofuranoside (8b) after total deprotection.
Ein-und zweikernige Phosphorinylnickel-Komplexe/Mono-and Binuclear Phosphorinylnickel Complexes
Authors: Lehmkuhl Herbert , Elsäßer Johannes , Benn Reinhard , Gabor Barbara , Rufińska Anna , Goddard Richard , Krüger Carl 
Published: March 2015

Abstract
The ethylene molecule in the binuclear complex [bis(2-4η-phosphorinyl)nickel](η2 -ethylene)-P,P′-nickel (1) is displaced by 1-alkenes in an equilibration reaction to give the corresponding (η2 -1-alkene)nickel complexes 2-5. The NMR spectra of the octene complex 3 and the propene complex 6 are temperature dependent because of valence isomerization in the phosphorinyl group and rotation of the olefin. The binuclear structure is not maintained upon displacement of the ethylene by butadiene or isoprene. One nickel atom is displaced as the dodecatrienediylnickel complex 9 and the remaining bis(phosphorinyl)nickel fragment B reacts with insertion of the diene into one allyl-Ni bond to give 7 resp. 8. The molecular structure of 7 was determined by X-ray crystallography.
Neue Bis(phosphan)-nickel(0)-alkin-Komplexe /New Bis(phosphane)-nickel(0)-alkyne Complexes
Authors: Pörschke Klaus R. , Mynott Richard , Angermund Klaus , Krüger Carl 
Published: March 2015

Abstract
(Me3P)2Ni(C2H4) (5) and (dmpe) 2Ni2(C2H4)3 (6) react with various alkynes including ethyne (acetylene) and 1-alkynes to form the crystalline compounds (Me3P)2Ni(C2RR′), (dmpe)Ni(C2RR′), and (dmpe)2Ni2(C2R2)2 (R.R′ = H, Me, Ph). Structural assignments were made on the basis of 1H, 13C, and 31P NMR data. The crystal and molecular structure of (dmpe)Ni(C2Ph2) (17) has been determined by X-ray crystallography.
Darstellung und Kristallstruktur von Tl2TiS4 : Ein Perthiotitanat(IV) mit ∞
1-[TiS4
2-]-Ketten Preparation and Crystal Structure of Tl2TiS4 : A Perthiotitanate(IV) with ∞
1-[TiS4
2-]-Chains
Authors: Klepp Kurt O. 
Published: March 2015

Abstract
Tl2TiS4 is orthorhombic, space group Pbca, with a = 22.176(7), b = 9.484(4), c = 6.3977(9) Å, Z = 8. The crystal structure was solved by direct methods and refined to a conventional R of0.058 for 704 reflections with I ≥3σ(I). The crystal structure is characterized by infinite perthioanions, ∞
1-[TiS 4/2 (S2)2- ], which are separated by Tl+ -cations. The anion chains are built up by distorted octahedra which share two skew edges to form infinite cis-chains running along [001], The two unshared S-atoms of each octahedron are connected via a S -S-single bond of 2.10 Å length. The crystal structure is described as a mixed packing of TI-and S-atoms, composed of puckered TlS2 -layers, in which the Ti-atoms occupy the octahedral interstices. The relationship of the ∞
1-[TiS4
2- -]-chains to the anionic groups of Cs2TiS3 is discussed.
Zur Kenntnis der Selenidosilikate und -germanate Na4Si4Se10, Na2GeSe3 und Na8Ge4Se10 / On the Selenidosilicates and Germanates Na4Si4Se10, Na2GeSe3 and Na8Ge4Se10
Authors: Eisenmann Brigitte , Hansa Jendy , Schafer Herbert 
Published: March 2015

The following new compounds have been prepared and structurally characterized: Na4Si4Se10: orthorhombic, space group Cmcm (No. 63). a = 1340.9(5) pm, b = 1318.4(5) pm, c = 1086.5(4) pm, Z = 4. ρx = 3.44 g/cm3, ρexp = 3.47 g/cm3. The compound crystallizes in the Na4Si4S10 type with adamantane analogous Si4Se10
4- anions.
Na2GeSe3: Monoclinic, space group P21/c (No. 14). a = 709.7(2) pm, b = 1606.8(5) pm, c = 607.3(2) pm, β = 113.69(8)°, Z = 4, ρx = 3.72 g/cm3, ρexp = 3.76 g/cm3. The compound is isotypic with Na2GeS3. GeSe4-tetrahedra are connected by common corners to infinite “Zweiereinfach” chains.
Na8Ge4Se10: monoclinic, space group P21/c (No. 14). a = 1310.4(5) pm, b = 1205.7(5) pm, c = 1410.1(5) pm, β = 92.9(1)°, Z = 4, ρx = 3.77 g/cm3, ρexp = 3.75 g/cm3. Analogous to Na8Ge4Te10 (mod. I), two octahedral Ge2Se6 - units are connected by a common edge to a Ge4Se10
8-“ - anion.
Darstellung und Struktur von Cs2As8S13 / Preparation and Structure of Cs2As8S13
Authors: Sheldrick W. S. , Kaub J. 
Published: March 2015

Abstract
The thioarsenate(III) Cs2As8S13 has been prepared by the reaction of Cs2CO3 with As2S3 in aqueous solution under pressure at 180 °C. Its structure has been established by X-ray structural analysis. The polymeric anion (As8S13
2-)n is composed of individual As4S4 -rings, which are each connected to three further eight-membered rings via As-S-As bridges, so giving rise to an infinite layer structure.
Über die Reaktion von Hydroxylamin mit Acrylsäure / On the Reaction between Hydroxylamine and Acrylic Acid
Authors: Brachtel G. , Jansen M. 
Published: March 2015

Abstract
Hydroxylamine reacts with acrylic acid via a triple Michael-addition forming the 3,3-bis-[2-carboxyethyl]-3-hydroxyaminopropionic acid betain (C9H15NO7). The crystal and molecular structures have been determined by X-Ray methods (P21/n; a = 8.097(2), b = 9.343(3), c = 14,647(4) Å, β= 91.35(3)°, Z = 4).
Synthese und Bindungsverhältnisse von 1-Dimethylaminothiabenzol-1-oxiden / Synthesis and Bonding Properties of 1-Dimethylaminothiabenzene-1-oxides
Authors: Weber Lothar 
Published: March 2015

Abstract
The 1-dimethylaminothiabenzene-l-oxides 5a-d are obtained by the reaction of the 2-propy-nones 2a-d with methyl-dimethylamino-oxosulfonio methanide 3 and subsequent treatment of the mixture with t-BuOK. The bonding properties of 5a-d are discussed by comparison of their IR, 1H and 13C NMR data with those of the already known 1-methylthiabenzene-1-oxides 6a-d.
A Convenient Synthesis of the 2-Dimethyl-2H-Chroinene-System
Authors: Reisch Johannes , Dharmaratne H. Ranjith W. 
Published: March 2015

Abstract
2,2-Dimethyl-5H-pyrano(3,2-c)-l-benzopyrano-5-one(2) and 4H-2,3-dihydro-3-methyl-2-methylene-furan-1-benzopyran-4-one (3), two new coumarin derivatives were synthesised from 4-hydroxycoumarin by treating with 3-chloro-3-methylbut-1-yne and 3-chlorobut-1-yne respectively, both reactions progressing via the phase-transfer catalysis.
Activated Nitriles in Heterocyclic Synthesis: A Novel Synthesis of Pyridazine, Pyrimidine, Pyridine and Pyrano[4,3-b]pyridine Derivatives
Authors: Mohareb R. M. , Fahmy S. M. 
Published: March 2015

Abstract
Diethyl-3-amino-2-cyano-2-pentendioate (1) reacts with aromatic amines and aminohetero-cyclic compounds to yield amide derivatives (2 c-h). The latter derivatives were utilised in synthesis of pyridazines (4a, b), pyrimidine (6), pyridone (9) and pyrano[4,3-b]pyridine (16a, b) derivatives via reaction with aryldiazonium chloride, trichloroacetonitrile, sodiummethoxide and cinnamonitrile derivatives, respectively.