bluuebunny/crossref_metadata_2025_split huggingface dataset:
Zur Metachromasie von Toluidinblau in Gegenwart von Nucleinsäuren
Authors: Tempel K. 
Published: March 2015

1. Nach Zusatz von Nucleinsäuren zu wäßrigen Toluidinblaulösungen treten neue Farbqualitäten auf. Ihre Absorptionsmaxima lagen bei 655, 585 und 555 nm.
2. Art und Umfang dieser Metachromasie sind abhängig vom Reaktionsmilieu, vom Farbstoff-Polyanionen-Konzentrationsverhältnis sowie von Molekülgröße und Nativität der einzelnen Nucleinsäurepräparate.
3. In wäßrigen Proteinlösungen gelöste hochmolekulare DNS-Präparate verhalten sich gegenüber DNS-Lösungen ohne Proteinzusatz wie Präparate höherer Nativität.
4. Änderungen der metachromotropen Eigenschaften von DNS-Protein-Lösungen sind qualitativ und quantitativ als empfindlicher Nachweis für denaturierende Einflüsse (Hitze, ionisierende Strahlen, UV-Licht, Ultraschall, Tris- (β-chloräthyl) -amin oder DNase I) verwertbar.
Über die Strukturspezifität der Saponinhämolyse / Structural Specifity of Saponin Hemolysis
Authors: Schlösser E. , Wulff G. 
Published: March 2015

A considerable number of saponins and aglycones of the triterpene type has been tested for hemolytic activity. From the results it is deduced, that the optimum hemolytic activity depends on the following structural arrangements. Aglycones require a polar grouping in ring A and a moderate polar grouping in ring D or E. Compounds containing a 16α-OH or 16-keto group together with a 3/β-OH group had the highest hemolytic potential of the substances tested. The distance of 10,5 A between 3/β-OH and 16α·ΟΗ appears to be of special significance. Acylation of either group results in a remarkable loss of activity.
With saponins, which bear a sugar chain on 3/β-OH, the distance between the strong and the weak polar grouping is less critical. The composition of the sugar chain has a certain influence on the hemolytic power. A polar grouping in ring D and/or E, such as a sugar chain or a number of OH-groups, results in considerable inactivation of the substance.
Die Dosisabhängigkeit der intestinalen Eisenresorption bei Menschen mit normalen Eisenreserven und Personen mit prälatentem/latentem Eisenmangel / Dose Relationship of Intestinal Iron Absorption in Man with Normal Iron Stores and Persons with Prelatent/Latent Iron Deficiency
Authors: Heinrich H. C. , Gabbe E. E. , Whang D. H. 
Published: March 2015

An estimation of the dose relationship of intestinal iron absorption in man is only reasonable if a reliable method for the measurement of iron absorption is used, and the amount of available storage iron, which influences iron absorption considerably, is considered. Intestinal 59Fe2⊕-absorption was therefore quantitated by measuring the whole body retention of absorbed 59Fe within a 4 π-large volume radioactivity detector with liquid organic scintillator. The diagnostic 10 μΜοl (⧋ 0.558 mg) 59Fe2⊕-absorption test was used for discriminating between persons with normal 59Fe-absorption due to normal iron stores and persons with very much increased 59Fe-absorption caused by depleted iron stores.
Within a dose range from 0.56 to 50 mg 59Fe2® the bilogarithmic plotting of the estimated 59Fe2⊕-absorption (in mg) against the iron dose resulted in a straight line, which can be described in males and females with normal iron stores by the equations Rmg = 0.206 · D0.676 and Rmg = 0.250-D0.668 respectively. In males and females with depleted iron stores the dose relationship can be characterized by the absorption equations Rmg=0.594·D0.684 and Rmg=0.731·D0.650 respectively.
The whole body 59Fe turnover rate in man (= iron requirement) and the dose relationship of intestinal 59Fe-absorption are a suitable experimental basis for the oral iron prophylaxis and therapy.
Isocyanate und Isothiocyanate von cyclischen Phosphor-Stickstoff-Verbindungen / Isocyanates and Isothiocyanates of Cyclic Phosphorus Nitrogen Compounds
Authors: Roesky Herbert W. , Janssen Enno 
Published: March 2015

By substitution of a halogen atom in cyclic phosphazenes by isocyanate or isothiocyanate new members of this class of compounds are synthesized. These compounds are fairly stable against hydrolysis. Reaction of the new compounds with amines yields
P3N3F5NHC(O)N(CH3)2 and P3N3F5NHC(S)N(CH3)2. With elemental chlorine P3N3F5N = CCl2 is formed. Numerous IR, NMR and mass spectra data of the new compounds are reported.
Die Untersuchung der Isopolysäurebildung des Molybdats mit Hilfe dilatometrischer Titrationen, II / Formation of Isopolymolybdates Indicated by Dilatometric Titrations, II
Authors: Wiese Günther , Böse Doris 
Published: March 2015

The change of the volume associated with the acidification of magnesium-molybdate-solutions was continously controlled by dilatometric titrations. In the studied concentration range the following isopolymolybdates were identified:
[HMo2O8]3-, [Μο6O21]6-, [Μο6O20]4-, [Μο6O27]6-
Schiff Base Derivatives of Lanthanons / Synthesis of La(III) Pr(III) and Nd(III) Derivatives of Ethylenediamine Bis-2,4-pentanedione
Authors: Agarwal S. K. , Tandon J. P. 
Published: March 2015

The 1:1 and 2:3 molar reactions of La(III), Pr(III) and Nd(III) isopropoxides with the bifunctional tetradentate Schiff base, ethylenediamine bis-2,4-pentanedione [AA2(CH2)2H2] have been investigated in the medium of dry benzene.
Ln(O-i-C3H7) [AA2(CH2)2] and Ln2[AA2(CH2)2]3 [where, Ln = La(III), Pr(III) or Nd(III) and AA2(CH2)2
- 2 anion of the corresponding Schiff base, AA2(CH2)2H2] type of compounds have been obtained in almost quantitative yields and in a state of sufficient purity. The 1:1 derivatives have been shown to undergo exchange reactions with an excess of tert-butyl alcohol leading to the formation of Ln(O-tert-C4H9) [AA2(CH2)2] [where, Ln = La(III), Pr(III) or Nd(III)] type of derivatives. The ebullioscopic determination of molecular weights shows that the 1:1 derivatives are dimeric, whereas 2:3 derivatives are monomeric in boiling benzene. On the basis of elemental analysis, exchange reactions, molecular weight determinations and IR spectra, plausible structures for the resulting 1:1 and 2:3 complexes have been indicated.
Darstellung und Eigenschaften von Phosphidbromiden des Calciums, Strontiums und Bariums / Preparation and Properties of Phosphide Bromides of Calcium, Strontium, and Barium
Authors: Hadenfeldt Claus , Kosiol Wilfried 
Published: March 2015

The phosphide bromides M2PBr with M = Ca, Sr, Ba were prepared by reaction of metal, red phosphorous, and metal bromide corresponding a molar ratio M : P : Br = 2 : 1 : 1. In the systems “Ca3P2”–CaBr2 and “Sr3P2”–SrBr2 phase analytical investigations were made by varying the molar ratio M :P : Br. A cubic and a rhombohedral Ca2PBr- and Sr2PBr-phase as well as rhombohedral Ba2PBr were obtained. The cubic phases are stabilized by an excess of MBr2, the rhombohedral phases of Ca2PBr and Sr2PBr by an excess of “M3P2”
beyond the molar ratio 2:1:1. Analytical results, densities and lattice constants of the phases are given.
Die Komplexbildung der Zitronensäure, I / The Formation of Complexes with Citric Acid, I
Authors: Wiese Günther , Veith Josef A. 
Published: March 2015

With a simple mathematical method the three-component-system eH3Ci (citric acid) + fAlCI3 + gNaOH was analysed and the formation of complexes between citrate and aluminium calculated. Mixtures of eH3Ci + fAlCI3, with e/f ratios from 0 to 2.5 were titrated with NaOH. For each titrated mixture which existed of eH3Ci + fAlCI3 the coefficient g(NaOH) was found from the inflection points of the titration curves. When the eH3Ci/fAlCI3 molar ratios were plotted against the corresponding molar ratios of gNaOH/fAlCI3, linear functions were obtained from which the following three dehydrated complexes were calculated :
[Al3OHCi3]⊖ from the first inflection point at pH between 3.0-3.5,
[Al3(OH)4Ci2]⊖ from the 2nd inflection point at pH between 3.8-4.8, and
[Al10(OH)15Ci6]3⊖ from the 3rd inflection point at pH between 5.6-7.5.
Reaktionskinetische Untersuchungen zur Bildung von Carbeniumionen des Triphenylmethyl-Typs / Kinetic Investigations of the Formation of Carbenium Ions of the Triphenylmethyl Type
Authors: Walper Matthias , Brauer Hans-Dieter , Kelm Hartwig 
Published: March 2015

The rates of formation of three mono- and three dicarbenium ions of the triphenylmethyl type from the corresponding carbinols in trifluoro acetic acid - toluene mixtures were investigated using stopped flow techniques.
The reaction mechanisms are discussed in view of the obtained dependencies of the rate constants on acid concentration and temperature.
Notizen: Bis(trimethylsilylhydrazido)-thiophosphorsäurephenylester – ein neues Zwischenprodukt für die Synthese anorganischer Heterocyclen / Bis(trimethylsilylhydrazido)-thiophosphoric Acid Phenylester - A New Intermediate for the Synthesis of Inorganic Heterocycles
Authors: Steger Lothar , Engelhardt Udo 
Published: March 2015

The title compound,
C6H5O-(S)P[NH-NH-Si(CH3)3]2 (1), m. p. 37-39°C, is prepared by silylation of the parent dihydrazide with (CH3)3SiCl in the presence of an excess of base. 1 is purified by vacuum destillation and characterized by 1 H NMR, IR, Ra, mass spectra and analysis. Phosphorus hydrazine heterocycles, such as cis- and trans-C6H5O-(S)P(NH-NH)2P(X)-OC6H5 (X = S, O) and others can be prepared from 1 and C6H5O-(X)PCl2 or other element dihalogene compounds.
The Axial Preference of Fluorine Atom in 2-Fluoro-4-methyl-1,3,2-dioxaphosphorinanyl Ring System
Authors: Okruszek A. , Stec W. J. 
Published: March 2015

The axial preference of fluorine substituent at phosphorus involved in 4-methyl-1,3,2-dioxaphosphorinanyl ring system was established.
Cis-trans geometry in this family of compounds was assigned by chemical correlation and by means of 1H, 13C, 19F and 31P NMR.
Notizen: Electron-radiolysis of Diphenylpicrylhydrazyl in Tetranitromethane. Evidence for a Free Radical Nitration Process
Authors: Filby W. G. , Kalus W. H. 
Published: March 2015

Isolation, Diphenylpicrylhydrazyl
Products and yields for the electron radiolytical decomposition of DPPH in tetranitro methane have been determined. Reaction occurs via attack of NO2 radicals, the dinitro adduct being the main product at the lowest doses investigated.
Darstellung, Struktur und Eigenschaften von N-Alkyliminoalanen / Preparation, Structure and Properties of N-Alkyliminoalanes
Authors: Nöth H. , Wolfgardt P. 
Published: March 2015

The N-alkyliminoalanes [tert-C4H9NAIH]4, [tert-C4H9NAID]4, [iso-C3H7NAIH]6, [C2H5NAlH]8 and [CH3NAIH]n have been prepared and intermediates such as Al3H3(N tert-C4H9)2(N tert-NHC4H9)2 and Al8H10(NC2H5)6(NHC2H5)2 isolated. Cage structures and opened cages respectively are suggested on the basis of physical data.
Halogenation of these iminoalanes by HgX2 proceeds in a complicated manner, the products depending on the mole ratio used, the size of the alkylgroup and cage. HX formation during the halogenation is indicated by the formation of [Cl2AlNHR]2. Regioselectivity was observed for partial chlorination of [C2H5NAlH]8. Pyrolysis of [RNHAIHCl]2 yields [tert-C4H9NAlCl]4 and [iso-C3H7NAlCl]4.
Untersuchung der cis-trans-Isomerie des WITTIGschen Kohlenwasserstoffs / Investigation of the cis-trans-Isomerism of the WITTIG Hydrocarbon
Authors: Sartorius Rolf , Schmidt Reinhard , Kelm Hartwig , Brauer Hans-Dieter 
Published: March 2015

The cis-trans-isomerism of the WITTIG hydrocarbon was investigated in solid state and solution by means of fluorescence spectroscopy. The fluorescence behavior of both isomers in 2-methyltetrahydrofurane was determined as a function of concentration, temperature, and wavelength of exciting radiation. Furthermore, irradiation experiments were undertaken with light of various wavelengths.
The results obtained are in agreement with the assumption that the WITTIG hydrocarbon behaves with regard to the cis-trans-isomerism like a 1,3-butadien derivative, i.e. a thermal but no photochemical cis-trans-isomerisation can be detected. The enthalpy difference between the two isomers was estimated to ΔΗ = 250 ± 50 cal/mole. It could be shown that the fluorescence of the cis-isomer is quenched by the trans-isomer. This quenching occurs probably according to the resonance energy transfer mechanism.
Radiation Chemistry of Carbohydrates, Vlll. γ-Radiolysis of Cellobiose in N2O-saturated Aqueous Solution. Part II. Quantitative Measurements. Mechanisms of the Radical-induced Scission of the Glycosidic Linkage
Authors: Von Sonntag Clemens , Dizdaroglu Miral , Schulte-Frohlinde Dietrich 
Published: March 2015

The γ-radiolysis of cellobiose (10-2 M) in N2O saturated aqueous solution has been investigated and the G-values of the following 21 products containing six or less C-atoms have been measured (G-values in parentheses): glucose (2.1), gluconic acid (0.70), 4-ketoglucose (0.07), 5-keto-glucose (0.05), 4-deoxy-glucose (0.27), 5-deoxy-gluconic acid (0.18), 2-deoxy-gluconic acid (0.13), 3-deoxy-4-keto-glucose (0.23), 2-deoxy-5-keto-glucose (0.34), 4-deoxy-5-keto-glucose (0.14), 6-deoxy-5-keto-glucose (0.02), arabinose (0.07), ribose (0.015), 2-deoxy-ribose (0.17), 3-deoxy-pentulose (0.01), erythrose (0.015), threose (0.015), 2-deoxy-tetrose (0.01), butanone-(2)-diol(1.4) (0.01), dihydroxyacetone (0.01), carbon monoxide ( &gt; 0.02).
The formation of the major part (98%) of the measured products could be explained on the base of the following assumption: The first step of reaction sequence is abstraction of H atoms from C-Η bonds of the cellobiose by OH radicals. Radicals at C-1′, C-5′ and C-4 and their successors undergo in a second step four types of reactions: hydrolysis, rearrangement and H2O and CO elimination. In a third step the transformed radicals give rise to products by disproportionation reaction. Only two products out of 16 predicted under the above assumption are not observed. G-values for the attack at C-1′, C-5′ and C-4 are 1.4, 0.6 and 0.3 respectively.
Notizen: Synthesis of Trimethylphosphazenyl- and Triphenylphosphazenyl-fluorocyclotriphosphaza-trienes by a Silylation Method
Authors: Du Plessis Jan A. K. , Rose Hans , Shaw Robert A. 
Published: March 2015

The synthesis of trimethylphosphazenyland triphenylphosphazenyl-fluorocyclotri-phosphazatrienes, N3P3F6-n(NPR3)n, by a silylation method using Me3SiNPR3 (R = Me or Ph) is reported. More phosphazenyl groups can be introduced if R = Me than if R = Ph. Isomers have been isolated, as have been mixed phosphazenyl derivatives,
N3P3Fe6-n-m(NPR3)n(NPR3′)m

(R = Ph, R′ = Me). Substituted fluorophosphazenes,
N3P3F6-nXn (X = Ph, NMe2, or OPh) also undergo similar reactions.
Radiation Chemistry of Carbohydrates, IX γ-Radiolysis of N-Acetyl-glucosamine in Aqueous Solution
Authors: Bradbury Allan G. W. , Sonntag Clemens von 
Published: March 2015

The γ-radiolysis of N-acetyl-glucosamine in deoxygenated (N2O saturated) and oxygenated (N2O/O2 saturated) solutions has been investigated. Eleven products have been characterised and their G-values estimated.
Deoxygenated conditions: The principal products identified are 1-acetamido-1,3-dideoxy-2-pentulose (4), 1-acetamido-1-deoxy-2-pentulose (5), 2-acetamido-2,3-dideoxyhexos-4-ulose (6), 2-acetamido-2-deoxy-hexodialdose (7), 2-acetamido-2-deoxy-hexos-5-ulose (8) and 2-acetamido-2-deoxy-gluconic acid (9). Products 1 to 3 contain 3-5 carbon atoms (acetamido group eliminated). Their yields are low.
Oxygenated conditions: G values of 5, 7, 8 and 9 are increased, whereas compounds containing a deoxy-keto group (4 and 6) are absent. C-C-bond scission is more important in the presence of oxygen. 2-Acetamido-2-deoxy-tetrodialdose (10) has been identified and a number of products with 5 carbon atoms in the chain retaining the acetamido group (11) have been recognised.
Mechanisms for the formation of products are proposed.
Pyrimidine Derivatives and Related Compounds, V Synthesis of Some Isoxazolo [2,3-a] pyrimidines. A New Ring System
Authors: Elnagdi Mohamed Hilmy , Kandeel Ezzat Mohamed , Sadek Kamal Usef 
Published: March 2015

3-Amino-5-phenyl-4-phenylazoisoxazole (1) reacts with ethyl acetoacetate to yield the corresponding ethyl isoxazolylaminocrotonate derivative (2) which could be thermally cyclized into the isoxazolopyrimidine derivative (4). On the other hand, condensation of 1 with ethoxymethylenemalononitrile has resulted in the formation of the aminoethylene derivative (5).
Compound 1 reacted with acrylonitrile to yield the isoxazolo[2,3-a]pyrimidine derivative (6). The latter was converted into the corresponding exo derivative (8) by the action of acetic acid-hydrochloric acid mixture.
Compound 1 also reacted with methoxycarbonyl-, ethoxycarbomyl- and benzoyl isothiocyanates to yield the isoxazolylthioureas (10a, b) and (11), respectively. The reaction of 2 with acetic acid-hydrochloric acid and with phenylhydrazine is reported.
Mössbauer-spektroskopische Untersuchungen an Na2MnFeF7 / Mössbauer Spectroscopic Investigation of Na2MnFeF7
Authors: Pebler J. , Schmidt K. , Babel D. , Verscharen W. 
Published: March 2015

In contrast to the Mössbauer spectrum of the orthorhombic compound Na2NiFeF7 that of the manganous compound Na2MnFeF7 gives evidence of two different iron positions. This rules out Na2MnFeF7 to be isostructural with Na2NiFeF7, which crystallizes like most compounds Na2MIIMIIIF7 in the weberite structure, the MIII ions occupying only one site in space group Imm 2-C2v
20.
The Mössbauer data evaluated for the two iron sites (Fe 1/Fe 2 respectively) in Na2MnFeF7 are: θ = 0/90°, φ = undetermined/70°, η = 0.6 both, Η = 551/541 kOe, Vzz = ± 2.7 · 1018 Vcm-2 both. NaMnFeF7 is antiferromagnetic with a Neél temperature of TN = 94 Κ for both iron positions.
Pyrimidine Derivatives and Related Compounds, VII Synthesis of Some New Pyrazolo [1,5-a] -S-triazines, Pyrazolo [3,4-c] -as-triazines, Pyrazolo [1,5-a] pyrimidines and Pyrazolo [3,4-b] pyrones
Authors: Elnagdi Mohamed Hilmy , Zayed Ezzat Mohamed , Kandeel Ezzat Mohamed , Fahmy Sherif Mahmoud 
Published: March 2015

3-Amino-4-phenylhydrazono-2-pyrazolin-5-one (1) reacts with isothiocyanate to yield the corresponding pyrazolylthiourea derivatives (2 a-c). Whereas 2 a reacted with hydrazines to yield the pyrazolylamino-1,2,4-triazoles (3 a, b), it cyclised into the pyrazolo-[3,4-e]-as-triazine derivative (4) upon treatment with concentrated sulphuric acid. On the other hand, the pyrazolo[1,5-c]-S-triazine derivative (5) was formed from reaction of 2a with ethanolic sodium ethoxide.
3-Amino-2-pyrazolin-5-one (8) reacted with ethyl acrylate to yield a mixture of the 4-dialkylated derivative (9) and the pyrazolo[3,4-b]pyrone (11). Compound 11 could be converted into the corresponding pyrazolo[3,4-b]pyrones (12) and (13) by the action of acetic acid hydrochloric acid mixture and of concentrated sulphuric acid, respectively.
Linear Chain Bis(α,β-dionedioximato)metal Compounds of the Nickel Triad: Solid State Design by Molecular Engineering
Authors: Endres H. , Keller H. J. , Lehmann R. , Poveda A. , Rupp H. H. , Sand H. Van De 
Published: March 2015

Chemical and structural data of numerous bis(α,β-dionedioximato)metal(II) compounds are summarized. All of them crystallize in columns but principally two different kinds of molecular arrangements occur in the solids. In one phase the molecular planes are inclined to the direction of the linear metal chains with an angle different from 90°. This allows only indirect interactions between the metal ions via the ligand. (“M—L—M” stacking.) The other modification consists of molecules with their planes perpendicular to the M—M-chains. This form allows direct metal-metal contacts (“M—M” modification). Depending on a few molecular parameters a “M—L—M” or a “M—M” stacking is obtained upon crystallization. Since for those compounds which could be isolated in both modifications the M—L—M form has the higher density it is concluded that only stronger M—M interactions stabilize the less dense M—M forms.
A wide range of metal-metal separations with a lower limit of 3.15 Å in mixed valence systems are found in different “M—M” compounds. In any case the intrachain metal-metal distances are reduced considerably upon oxidation of the bivalent complex molecules. The influence of “electronic” and “sterical” parameters of the complex molecules on the intermolecular metal interactions and on the type of columns in the solid state is discussed.
Über die Reaktionen von Na2[M2 (CO)10] (M = Cr, Mo, W) mit GeX4 und SnX4 (X = Cl, Br, I) / On the Reactions of Na2[M2(CO)10] (M = Cr, Mo, W) with GeX4 and SnX4 (X = Cl, Br, I)
Authors: Behrens Helmut , Moll Matthias , Sixtus Eduard 
Published: March 2015

(OC)5M-GeX2 · THF and (OC)5M-SnX2 · THF are formed by the reactions of disodium decacarbonyl dimetallates of 6 b metals with the tetrahalides GeX4 and SnX4:
Na2[(OC)5M-I-M-I(CO)5] + EX4[xxx](OC)5M-II-EX2· THF [xxx] Na[M°(CO)5X]
(M = Cr, Mo, W; E = Ge, Sn; X = Cl, Br, I).
Etherate and Pyridine Compounds of Mixed Complex Halo Acids of Indium(III) with Thiocyanate
Authors: Galinos A. G. , Zafiropoulos Th. F. 
Published: March 2015

The preparation, for the first time, of ether and pyridine compounds of mixed complex halo acids of indium(III) with thiocyanate is described.
The study of the chemical and physical properties of these acids and the UV and IR spectra of the pyridine compounds are also reported and discussed.
Heteronukleare Clustersysteme, X (CO)9Co3M(CO)2(η-C5H6) (M = Mo, W) — Synthese, Eigenschaften und Struktur von Molybdän- und Wolfram-haltigen Trikobaltnonacarbonyl-Clustern / Heteronuclear Cluster Systems, X (CO)9Co3M(CO)2(η-C5H5) (M = Mo, W) — Synthesis, Properties and Structure of Molybdenum and Tungsten Containing Tricobaltnonacarbonyl Clusters
Authors: Schmid Günter , Bartl Klaus , Boese Roland 
Published: March 2015

The synthesis of (CO)3(η-C5H5)M—Co(CO)4 and the cluster-compounds
(CO)9Co3M(CO)2(η-C5H5) (M = Mo, W)
is described. IR, 1H—NMR and mass spectroscopic data are discussed. The structure of (CO)9Co3Mo(CO)2(η-C5H5) was solved by X-ray analysis.
Über die Wirkung von Ozon auf Maleinsäure, Fumarsäure und deren Oxidationsprodukte in wäßriger Lösung / Reactions of Ozone with Maleic Acid, Fumaric Acid and with their Oxidation Products in Aqueous Solution
Authors: Gilbert Ernst 
Published: March 2015

The ozonation of maleic acid in aqueous solution (pH 3) leads to the formation of glyoxylic acid and formic acid which are oxidized to the stable endproducts oxalic acid and CO2 in the further course of the reaction.
With fumaric acid besides the double bond cleavage (75%) an anomalous ozonolysis is observed leading to the formation of the unstable intermediate mesoxalic acid semialdehyde which is oxidized to mesoxalic acid.
In both cases 45% of the organic carbon appear as CO2 after the complete elimination of the initial compounds. The specific ozone consumption in our experiments was 4 mmol O3 per mmol of acid.
On account of the quantitative follow up of the oxidation products the reaction mechanisms are discussed. The oxidation of glyoxylic acid, formic acid, oxalic acid and mesoxalic acid as pure substances by ozone gives qualitatively the same results as in the mixtures.
Die Molekiilstruktur von 11-Oxo-1.11-diphenyl-dibenzo [b.g] -indeno [2.3-d] -11.15 b-dihydrophosphocin / The Molecular Structure of / 11-Oxo-1,11-diphenyl-dibenzo[b,g]-indeno[2,3-d]-11,15 b-dihydrophosphocin
Authors: Winter Werner 
Published: March 2015

The title compound crystallizes in the monoclinic space group P 21/c with four molecules in the unit cell of dimensions a = 8.88(1), b= 20.86(3), c =14.14(2) Å, β= 111.27(5)°.
The structure was determined by direct methods and refined to R = 0.046 (1777 independent reflexions). The eight-membered phosphorus-carbon-heterocycle has a boatconformation and the phenyl-substituent occupies the quasi-axial ring-position.
Notizen: Zur Darstellung und Kristallstruktur von Mg5Al2Ses / On the Preparation and Crystal Structure of Mg5Al2Se8
Authors: Dotzel Klaus-Peter , Schäfer Herbert 
Published: March 2015

The new ternary selenide Mg5Al2Se8 has been prepared and structurally characterized. It crystallizes orthorhombic with
α = 1330 ± 3 pm, b = 632 ± 2 pm and
c = 772 ± 2 pm,
space group Pna21–C
. The relations to the Mg2SiO4 and Li3PO4 structure are demonstrated.