Go toArchive
Browse byFacets
Bookbag ( 0 )
Facet   section ZfN Section B:Volume 026  [X]
Results  381 Items
Sorted by   
Publication Year
1971 (381)
1Author    G. Hagele, Z. Z.Requires cookie*
 Title    Anwendung der 220 MHz Protonenresonanz-Spektroskopie zur Konformationsanalyse: 3.9-Dichloro-3.9-dithiono-2.4.8.10.3.9-tetraoxadiphospha-spiro(-6-)-undecan ein Spirocyclus mit zwei Dioxaphosphorinan-Ringen Application of 220 MHz Protonresonance-Spectroscopy for Conformation-Analysis  
 Abstract    The 220 MHz 1 H-NMR-Spectrum of a spirocompound was analysed in terms of an ABCDX Spinsystem. 4 /p0CH > 3 /HH , 5H and 5p were obtained and used to determine the geometry of the molecule. The spirocompound seems to have a rigid double-chair-conformation of C2-symmetry. 
  Reference    (Z. Naturforsch. 26b, 1 [1971]; eingegangen am 29. September 1970) 
  Published    1971 
  Similar Items    Find
 DEBUG INFO      
 TEI-XML for    default:Reihe_B/26/ZNB-1971-26b-0001.pdf 
 Identifier    ZNB-1971-26b-0001 
 Volume    26 
2Author    Wiking Müller, Herbert Schäfer, Armin WeissRequires cookie*
 Title    Die Struktur der Phasen Ca2LiSi3 und Ca2LiGe3  
 Abstract    Die intermetallischen Phasen Ca2LiSi3 und Ca2LiGe3 wurden dargestellt und ihre Struktur auf-geklärt. Die Verbindungen sind isotyp. Das Silicium-bzw. Germaniumteilgitter besteht aus ebenen, cis-fra/is-gewinkelten Ketten. Zusammenhänge mit den Kettenverbänden in den Erdalkalimono-siliciden und -germaniden werden diskutiert. 
  Reference    (Z. Naturforsch. 26b, 5—7 [1971]; eingegangen am 1. Oktober 1970) 
  Published    1971 
  Similar Items    Find
 DEBUG INFO      
 TEI-XML for    default:Reihe_B/26/ZNB-1971-26b-0005.pdf 
 Identifier    ZNB-1971-26b-0005 
 Volume    26 
3Author    0. A. Kunze, 0. G. Malan, P. A. Büger, W. FinkRequires cookie*
 Title    Der Einfluß von Sulfoxylaten auf die Photoleitfähigkeit chemisch hergestellter Bleisulfidschichten The Influence of Sulfoxylates on the Photoconductivity of Chemically Deposited Lead Sulfide Layers  
 Abstract    In addition to the procedure of partial oxidation of lead sulfide layers in order to increase their photoconductivity it was found that reduction may have a similar effect. When used as additives to the conventional thiourea-plumbite solution, the compounds amino-iminomethanesulfinic acid (1), rongalite or sodium dithionite, which all may form sulfoxylate in aqueous solution, enhance the photoconductivity of the deposited layers. Addition of H202 or Pb02 has a similar, less pronounced effect, which may also be ascribed to the intermediate oxidation of thiourea to 1. 
  Reference    (Z. Naturforsch. 26b, 8—11 [1971]; eingegangen am 12. September 1970) 
  Published    1971 
  Similar Items    Find
 DEBUG INFO      
 TEI-XML for    default:Reihe_B/26/ZNB-1971-26b-0008.pdf 
 Identifier    ZNB-1971-26b-0008 
 Volume    26 
4Author    P. Prashar, J. P. TandonRequires cookie*
 Title    Studies in Niobium (V) -Schiff Base Complexes*  
 Abstract    A number of new niobium (V)-Schiff base complexes of the type Nb(SB)x(0Pri)5_2x and Nb(SB)2(SBH) (where SB 20 and SBH® are anions of the Schiff bases and x = l or 2) have been synthesised by the interaction of niobium pentaisopropoxide with the Schiff bases in different stoichiometric ratios. The molecular weight determinations and IR studies of a few derivatives have also been carried out. Scanty references are available in the literature regarding the S c h i ff base complexes of niobium (V) and tantalum (V) 2 and such derivatives have been prepared from the corresponding metal chlorides and the Schiff bases. In a series of papers published earlier 3 ' *, a more con-venient method, for the synthesis of such derivatives, by the interaction of metal alkoxides with the Schiff bases in anhydrous benzene medium, has been reported. The present paper describes the synthesis of several new niobium (V) derivatives with the Schiff bases derived from the con-densation of salicylaldehyde or o-hydroxyacetophenone with n-hydroxyalkylamines. 
  Reference    (Z. Naturforsch. 26b, 11—13 [1971]; eingegangen am 8. Oktober 1970) 
  Published    1971 
  Similar Items    Find
 DEBUG INFO      
 TEI-XML for    default:Reihe_B/26/ZNB-1971-26b-0011.pdf 
 Identifier    ZNB-1971-26b-0011 
 Volume    26 
5Author    H. C. Heinrich, E. E. Gabbe, D. H. WhangRequires cookie*
 Title    Physikalische und biologische Halbwertzeit von radiochemisch reinem 59 Fe Physical and Biological Half-Life of Radiochemically Pure 59 Fe  
 Abstract    At delivery commercial 59 Fe-preparations contain up to 1% contamination by 60 Co, 65 Zn, 54 Mn, 46 Sc, 134 Cs, etc., so that the physical half-life of such preparations is not constant and starts to increase permanently after about 100 days. Anion exchange chromatography was used to prepare 59 Fe with a radiochemical purity of 99.9999993? as demonstrated by analytical anion exchange chromatography, paper-and thin-layer chromatography, and /-spectroscopy. The physical half-life of radiochemically pure 59 Fe was found to be constant over 500 days with 44.52 ±0.016 days (A= 0.015568 ±0.0000056 [d" 1 ]). The whole-body retention of radiochemically pure 59 Fe was measured in man over one year with a 4 Ti-geometry whole-body radioactivity detector and utilized for the estimation of the ef-fective half-life of 59 Fe. The correct physical half-life of radiochemically pure 59 Fe was used for the calculation of the biological half-life. Normal male subjects showed an effective half-life of 43.6 ± 0.34 days and a biological half-life of 2136 ± 807 days. This means a whole-body-59 Fe-turn-over rate of 0.032 ± 0.012%/d equivalent to 1.25 ± 0.46 mg Fe/d (for a whole-body iron pool of 3850 mg in a 70 kg man). Menstruating females were observed to have effective half-lives of 43.1 ± 0.22 days and therefore biological half-lives of 1389 ± 224 days. Their whole-body-59 Fe-turnover rate is higher (than in males) with 0.050 ±0.008%/d. For an optimal whole-body iron pool of 3300 mg (in 60 kg female) this would mean an iron loss of 1.65 ± 0.26 mg/d. Non-menstruating females were quite similar to males. They showed effective and biological 59 Fe-half-lives of 43.5 ± 0.48 and 1833 ± 857 days, respectively. Their whole-body-59 Fe-turnover rate was calculated to be 0.038 ±0.018%/d or 1.25 ± 0.59 mg Fe/d (60 kg female with 3300 mg Fe-pool). These experimen-tal data are the first direct and reliable proof for the magnitude of daily iron loss and iron re-quirements in man. 
  Reference    (Z. Naturforsch. 26b, 13—20 [1971]; eingegangen am 14. Oktober 1970) 
  Published    1971 
  Similar Items    Find
 DEBUG INFO      
 TEI-XML for    default:Reihe_B/26/ZNB-1971-26b-0013.pdf 
 Identifier    ZNB-1971-26b-0013 
 Volume    26 
6Author    J. Csonka-Horvai, A. David, G. Horväth, G. Näray-SzaböRequires cookie*
 Title    Rotational Isomerism in Bis-[/>-(3-Methyl-butyloxy)-phenyl]-thiourea  
 Abstract    It was found that bis-[p-(3-methyl-butyloxy) -phenyl] -thiourea, (applied in the therapy under the name of Thiocarlidum * as a tuberculo-and leprostatic) has two modifications in the solid state. By the aid of thermoanalitical, spectroscopical and X-ray studies it was shown, that the phase transformation arises as a result of the change in the conformtion of the molecule. 
  Reference    (Z. Naturforsch. 26b, 21—23 [1971]; eingegangen am 10. August 1970) 
  Published    1971 
  Similar Items    Find
 DEBUG INFO      
 TEI-XML for    default:Reihe_B/26/ZNB-1971-26b-0021.pdf 
 Identifier    ZNB-1971-26b-0021 
 Volume    26 
7Author    Th Gheorghiu, K. OetteRequires cookie*
 Title    The Effect of Stereoisomeric Structure on Retention Time in Gas Liquid Chromatography of Per-O-trimethylsilyl Derivatives of Pentoses and Hexoses  
 Abstract    The analysis of relationships between structure and retention time in gas liquid chromato-graphy of pentoses and hexoses leads to the formulation of following rule: the per-O-trimethyl-silyl derivatives of aldoses stereoisomers with conformational stability, identical ring form and the same number of substituted OH groups are longer retained on polar columns when the equatorial substituents are more numerous and are located nearer to the anomeric carbon. 
  Reference    (Z. Naturforsch. 26b, 24—25 [1971]; eingegangen am 15. August 1970) 
  Published    1971 
  Similar Items    Find
 DEBUG INFO      
 TEI-XML for    default:Reihe_B/26/ZNB-1971-26b-0024.pdf 
 Identifier    ZNB-1971-26b-0024 
 Volume    26 
8Author    Ludwig Pohl, Ralf SteinsträsserRequires cookie*
 Title    Über die Existenz nematischer Sekundärstrukturen On the Existence of Nematic secondary Structures  
 Abstract    The composition of binary and ternary eutectics of homologous, nematic p,p'-disubstituted ben-zylideneanilines, the specifically staggered arrangement of molecules in crystals of anisaldazine-. p,p'-azodiphenetole and p-azoxyanisole, and NMR-investigations in p,p'-di-ra-hexyloxyazoxybenzene lead to the suggestion that, under certain circumstances, nematic liquid crystals can enter into a short range order consisting not of individual molecules but of molecular strands of different lengths, each built up of three individual molecular chains having probably a head-to-tail sequence and turned by 180° with respect to each other. We designate such a liquid crystalline state of order as a nematic secondary structure. 
  Reference    (Z. Naturforsch. 26b, 26—29 [1971]; eingegangen am 18. August 1970) 
  Published    1971 
  Similar Items    Find
 DEBUG INFO      
 TEI-XML for    default:Reihe_B/26/ZNB-1971-26b-0026.pdf 
 Identifier    ZNB-1971-26b-0026 
 Volume    26 
9Author    K. K. Banerji, P. Nath, G. V. BakoreRequires cookie*
 Title    Kinetics of the Oxidation of methyl «-propyl ketone by manganese(III) sulphate  
 Abstract    The oxidation of methyl n-propyl ketone by Mn(III) sulphate in aq. acetic acid is first order with respect to the ketone and Mn (III). The rate is independent of acidity and solvent composition. The activation parameters for oxidation and enolisation were evaluated. Oxidation is faster than enolisation under similar conditions. A mechanism involving an attack on the keto-form by Mn(III) is proposed. 
  Reference    (Z. Naturforsch. 26b, 30—31 [1971]; received 8 September 1970) 
  Published    1971 
  Similar Items    Find
 DEBUG INFO      
 TEI-XML for    default:Reihe_B/26/ZNB-1971-26b-0030.pdf 
 Identifier    ZNB-1971-26b-0030 
 Volume    26 
10Author    A. Matsuo, M. Nakayama, Y. Ishida, S. HayashiRequires cookie*
 Title    Isolation of Nonacosan-10-ol and Cuparene from the Liverwort, Bazzania pompeana  
 Abstract    In the course of investigation on chemical constituents of methanol extract from the liverwort, Bazzania pompeana (Lac.) Mitt., a secondary alcohol, nonacosan-10-ol, and a benzenoid sesqui-terpene hydrocarbon, cuparene, were isolated in addition to two new sesquiterpenoids, bazzanene and bazzanenol, which have been reported 2 . 
  Reference    (Z. Naturforsch. 26b, 32—33 [1971]; received 28 September 1970) 
  Published    1971 
  Similar Items    Find
 DEBUG INFO      
 TEI-XML for    default:Reihe_B/26/ZNB-1971-26b-0032.pdf 
 Identifier    ZNB-1971-26b-0032 
 Volume    26 
11Author    Jürgen Jacob, Alfred ZemanRequires cookie*
 Title    Uropygial Gland Fat of the Fulmar  
 Abstract    The uropygial (preen) gland fat of the fulmar (fulmarus glacialis) was shown to be a complex mixture of ester waxes. Acidic components were homologous series of 3-, 4-and 6-monomethyl-substituted, and 2,6-, as well as 3,7-dimethyl-substituted fatty acids. Besides, 2-methyl, 2,4-, 4,6-, and 4,8-dimethyl-substituted fatty acids could be detected. The alcoholic components belonged to homologous series of rc-alkanols, and 2-, 4-, and 6-me-thyl-substituted primary alkanols. Furthermore, 14-methyl-hexadecanol could be identified. 
  Reference    (Z. Naturforsch. 26b, 33—40 [1971]; eingegangen am 28. September 1970) 
  Published    1971 
  Similar Items    Find
 DEBUG INFO      
 TEI-XML for    default:Reihe_B/26/ZNB-1971-26b-0033.pdf 
 Identifier    ZNB-1971-26b-0033 
 Volume    26 
12Author    Kunhard Pollow, Barbara PollowRequires cookie*
 Title    Oxydativ-reduktive Wechselwirkung zwischen Oestrogenen und Androgenen in Leberschnitten von Ratten  
 Abstract    Oestradiol fungiert als spezifischer Wasserstoffdonator bei der Hydrierung von 17-ständigen Oxo-Gruppen zu Hydroxy-Gruppen von Z) 4 -C19-Steroiden (s. frühere Untersuchungen) 1-5 . Die vorlie-gende Arbeit zielt darauf ab, aus den Ergebnissen von Leber-Schnittversuchen durch quantitative Analyse der oxydativ wie auch reduktiv entstandenen Metabolite die wechselseitigen reduktiv-oxydativen Beziehungen zwischen Oestrogenen und Androgenen zu charakterisieren. Die durch die Leberzelle hydroxylierten Metabolite werden in summa durch Messung der Bildung "hochpolarer" Metabolite festgestellt, während die reduktiv veränderten Metabolite in möglichst breitem Spek-trum identifiziert werden. 
  Reference    (Z. Naturforsch. 26b, 40—42 [1971]; eingegangen am 6. August 1970) 
  Published    1971 
  Similar Items    Find
 DEBUG INFO      
 TEI-XML for    default:Reihe_B/26/ZNB-1971-26b-0040.pdf 
 Identifier    ZNB-1971-26b-0040 
 Volume    26 
13Author    Hans-Gerhard Löffler, Friedhelm Schneider, Helmut WenckRequires cookie*
 Title    Kinetik der Reaktion von Papain mit Bromacetamid Kinetics of the reaction of papain with bromoacetamide  
 Abstract    The pH-dependence of the second order rate constants of the reaction of papain with bromo-acetamide in the pH-range 5,5—8,5 is described by a curve with a turning point corresponding to a pK 7,3 + 0,1 at 25°. This is the pK of a catalytically essential imidazole residue. The activa-tion parameters of the reaction of papain with bromoacetamide were determined. The second order rate constants at pH 7 for the reaction is 200 times greater than for the reaction of bromoacet-amide with simple SH-compounds. 
  Reference    (Z. Naturforsch. 26b, 43—46 [1971]; eingegangen am 25. September 1970) 
  Published    1971 
  Similar Items    Find
 DEBUG INFO      
 TEI-XML for    default:Reihe_B/26/ZNB-1971-26b-0043.pdf 
 Identifier    ZNB-1971-26b-0043 
 Volume    26 
14Author    Doris Hiedemann, -Van Wyk, C.Gamini KannangaraRequires cookie*
 Title    Localization of ferredoxin in the thylakoid membrane with immunological methods  
 Abstract    Antibodies were prepared against ferredoxin isolated from spinach. These antibodies and those against TPN-ferredoxin-reductase, carboxydismutase and coupling factor were used to clarify the localization of these proteins in the thylakoid membrane. Chloroplast preparations obtained by different methods show not the same immunological reactions. Only lamellar systems suspended in the leaf homogenate are agglutinated by anti-ferredoxin. Washed lamellar systems show an ag-glutination with anti-ferredoxin only if ferredoxin is added. In certain preparations of lamellar systems the presence of ferredoxin inhibit the reaction of anti-TPN-ferredoxin-reductase with the lamellar system. Lamellar systems freed of coupling factor by EDTA treatment are agglutinated by anti-TPN-ferredoxin-reductase. Addition of coupling factor to the EDTA treated lamellar systems inhibit the agglutination but not the adsorption of TPN-ferredoxin-reductase antibodies. By the assumption that the inhibition of the agglutination by the TPN-ferredoxin-reductase anti-bodies is caused by sterical hindrance, these results indicate, that ferredoxin, coupling factor and TPN-ferredoxin-reductase are localized close to each other in the thylakoid membrane. 
  Reference    (Z. Naturforsch. 26b, 46—50 [1971]; eingegangen am 29. August 1970) 
  Published    1971 
  Similar Items    Find
 DEBUG INFO      
 TEI-XML for    default:Reihe_B/26/ZNB-1971-26b-0046.pdf 
 Identifier    ZNB-1971-26b-0046 
 Volume    26 
15Author    H.-E Buchwald, Ch WolffRequires cookie*
 Title    Further Evidence for Carotenoids Engaged in a Metastable State in Photosynthesis  
 Abstract    During photosynthesis a metastable state is formed by superfluous excitation energy. Only caro-tenoids are responsible for the metastable state. Especially no chlorophyll-a is involved in this state. This result was obtained by using the repetitive ultra-short-flash technique in combination with the high frequency modulated measuring light technique. 
  Reference    (Z. Naturforsch. 26b, 51—53 [1971]; received 3 September 1970) 
  Published    1971 
  Similar Items    Find
 DEBUG INFO      
 TEI-XML for    default:Reihe_B/26/ZNB-1971-26b-0051.pdf 
 Identifier    ZNB-1971-26b-0051 
 Volume    26 
16Author    Friedrich LeibenguthRequires cookie*
 Title    Zur Pleiotropie des wh-und e/-Locus bei Habrobracon juglandis Concerning Pleiotropism of wh and el Locus in Habrobracon juglandis  
 Abstract    The two autonomously manifesting mutations, eyeless (el) and white eyes (wh), of Habro-bracon juglandis were compared phenotypically with the wild-type. Eyeless reduces the compound eyes in size. The penetrance is 100%, while expressivity ranges from point-shaped ommochrome crumbs over individual facets to a small eye with abundant facets. There is no correlation between the sizes of left and right eyes. The head capsule is more deformed when the eye is smaller. The homozygote $$ of wild-type have smaller eyes than the hemizygote $ S-This gene dose effect is still stronger in el. wh causes white eye colour which remains throughout lifetime. With regard to the amount of eye pigment the three stoacs can be arranged in the following sequence: wild type ^>el^>wh. The concentrations of ommochrome precursors, however, do not agree with this sequence. The amount of 3-hydroxykynurenine in el is the same as in wild-type; although in pupal stage the peak in the former appears earlier. The kynurenine concentration in el increases at the time of pupation and induces the beginning of pigmentation earlier than in wild-type; further this process is terminated in el earlier. In wh and in wild-type the amount of kynurenine is also the same. However, there is much less 3-hydroxykynurenine in wh than in wild-type. This is presumably due to a lower kynurenine hydroxylase activity. During the entire postembryonal development there is more xanthurenic and kynurenic acid in wh; in pupal stage, even, there is a second peak. Pupae and adults of wh have a higher kynurenine and presumably also a higher 3-hydroxy-kynurenine transaminase activity than wild-type. The influence of the mutation wh on the differential rates of hydroxylation and transamination is discussed in relation to the results obtained with mutants of the white locus in Drosophila. 
  Reference    (Z. Naturforsch. 26b, 54—60 [1971]; eingegangen am 17. September 1970) 
  Published    1971 
  Similar Items    Find
 DEBUG INFO      
 TEI-XML for    default:Reihe_B/26/ZNB-1971-26b-0054.pdf 
 Identifier    ZNB-1971-26b-0054 
 Volume    26 
17Author    W. Strohmeier, W. Rehder-StirnweissRequires cookie*
 Title    Reaction Rate r of the Catalytic Hydrogenation of Unsaturated Compounds M with RhX(CO)L2 as a Function of the Ligands X and L  
 Abstract    Im Gegensatz zu dem Komplex IrX(CO) (P<Z>3)2 ist der analoge Rhodiumkomplex RhX(CO) (P<Z>3)2 kein echter Hydrierungskatalysator, da die Hydrierung erst nach einer Induktionsperiode startet 1 . Es wurde wahr-scheinlich gemacht, daß der Komplex in dieser Zeit nach dem Schema (1) mit dem sehr aktiven Katalysator RhH(CO) (P3>3)2 im Gleichgewicht steht 2 , welcher für die Hydrierung verantwortlich ist 3 . RhX (CO) (P<Z>3) 2 + H2 ^ RhH (CO) (P<£3) 2 + HX . (1) 
  Reference    (Z. Naturforsch. 26b, 61—62 [1971]; eingegangen am 9. November 1970) 
  Published    1971 
  Similar Items    Find
 DEBUG INFO      
 TEI-XML for    default:Reihe_B/26/ZNB-1971-26b-0061_n.pdf 
 Identifier    ZNB-1971-26b-0061_n 
 Volume    26 
18Author    A. Mewis, H.-U SchusterRequires cookie*
 Title    The Structure of the Phases LiCo2Ge and LiNi2Sn  
 Abstract    Über ternäre Lithiumverbindungen des Nickels mit den Elementen Silicium und Germanium haben wir be-reits berichtet 1 . Weitere Untersuchungen haben zu der Darstellung der Phasen LiCo2Ge und LiNi2Sn geführt. LiCo2Ge konnte durch Umsetzen der binären Kobalt-verbindung Co2Ge mit Lithiummetall im Tantaltiegel bei 900 °C unter Argon, LiNi2Sn durch Tempern der Elemente bei 800 °C und anschließendes Abschrecken röntgenrein erhalten werden. LiCo2Ge liegt, auf diese Weise dargestellt, als gelbbraunes, metallisch glänzen-des Kristallpulver, LiNi2Sn als messinggelber Sinter-regulus vor. Beide Phasen werden durch Luftfeuchtig-keit nur langsam hydrolysiert. Zur Analyse wurden die Phasen in Königswasser ge-löst. Während die Bestimmung des Kobalts, Nickels und Zinns gravimetrisch erfolgte, wurde der Lithium-gehalt flammenphotomelrisch ermittelt. In Tab. 1 sind die Analysenergebnisse zusammengestellt. Gehalt in Gew. r 
  Reference    (Z. Naturforsch. 26b, 62 [1971]; eingegangen am 24. Oktober 1970) 
  Published    1971 
  Similar Items    Find
 DEBUG INFO      
 TEI-XML for    default:Reihe_B/26/ZNB-1971-26b-0062_n.pdf 
 Identifier    ZNB-1971-26b-0062_n 
 Volume    26 
19Author    Gernot Heckmann, Ekkehard FluckRequires cookie*
 Title    Solubility and Chemical Shift of 31 P Nuclear Resonance of white Phosphorus in Certain Solvents  
 Abstract    Im Rahmen unserer Untersuchungen über das Ver-halten des weißen Phosphors in gelöstem Zustand mit Hilfe der kernmagnetischen Resonanz wurden Löslich-keit und chemische Verschiebung des Phosphors in eini-gen organischen und anorganischen Lösungsmitteln be-stimmt. Kürzlich wurde berichtet 2 , daß 94,4 Gew.-% weißer Phosphor in Schwefelkohlenstoff bei 30 °C eine gesättigte Lösung ohne Bodenkörper bilden; in Phos-phortribromid lösen sich bei derselben Temperatur maximal 88,9 Gew.-% Phosphor 1 . Da sich die chemi-schen Verschiebungen der Kernresonanz des weißen Phosphors als stark konzentrationsabhängig herausstell-ten 1_4 , kann also bei Kenntnis der Konzentrationsab-hängigkeit mit Hilfe der kernmagnetischen Resonanz der unbekannte Phosphorgehalt in Systemen weißer Phosphor-Lösungsmittel sehr genau bestimmt werden. Weitere Angaben über die Löslichkeit von weißem Phosphor sind bei HILDEBRAND und SCOTT 5 sowie in Gmelins Handbuch der anorganischen Chemie 6 zu fin-den. Og/ppm 
  Reference    (Z. Naturforsch. 26b, 63—64 [1971]; eingegangen am 4. November 1970) 
  Published    1971 
  Similar Items    Find
 DEBUG INFO      
 TEI-XML for    default:Reihe_B/26/ZNB-1971-26b-0063_n.pdf 
 Identifier    ZNB-1971-26b-0063_n 
 Volume    26 
20Author    A. Muck, F. PetruRequires cookie*
 Title    Preparation and IR-Spectra of Trisphosphito-yttrium- Acid H3[Y(HP03)3]  
 Abstract    Die Darstellung dieser komplexen Säure erfolgte aus 2,2 g Y2(HP03)3-®/4 H20 durch Umsetzung mit einer Lösung von 12,5 g H3P03 in 50 ml H20 (Molverhält-nis 1 :30). Nach 12-stg. Stehen ging das Yttrium-phosphit in Lösung und nach weiterem eintägigen Stehen schieden sich aus der klaren Lösung farblose Kristalle ab, welche abgenutscht und mit Äther ge-waschen wurden. Deren Analyse entsprach der Formel H3[Y(HP03)3] ; berechnet 26,79% Y und 28,00% P, gefunden 26,12% Y und 28,08% P, Y:P = 1:3,08. Die Verbindung ist kaum in Wasser löslich, wobei die flüssige Phase jedoch eine starke saure Reaktion (pH ~ 1) zeigt und der Rüchstand nach dem Entfer-nen der wäßrigen Flüssigkeit unter dem Mikroskop dem hydratisierten Yttriumphosphit ähnlich ist. Diese komplexe Säure bildet sich nur in Gegenwart von überschüssiger phosphoriger Säure und stellt eine in-kongruent lösliche Verbindung dar, deren Zersetzung mit Wasser nach der Gleichung 
  Reference    (Z. Naturforsch. 26b, 64—65 [1971]; eingegangen am 11. November 1970) 
  Published    1971 
  Similar Items    Find
 DEBUG INFO      
 TEI-XML for    default:Reihe_B/26/ZNB-1971-26b-0064_n.pdf 
 Identifier    ZNB-1971-26b-0064_n 
 Volume    26 
1
2
3
4
5
...
Next