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  • 1
    Electronic Resource
    Electronic Resource
    Large third-order nonlinear optical response from molecules with effective multidirectional charge-transfer transitions: New design of third-order nonlinear chromophoresWe thank Dr. Peter Sommer-Larsen for fruitful discussions and the EU HCM network “Novel third-order nonlinear optical materials” as well as the Danish Research Councils for financial support. (1997)
    Weinheim : Wiley-Blackwell
    Advanced Materials 9 (1997), S. 1113-1116 
    Details
    ISSN: 0935-9648
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/adma.19970091411
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  • 2
    Electronic Resource
    Electronic Resource
    Third-harmonic generation from regio-regular and regio-irregular poly(3-dodecylthiophenes). Dependence of χ(3) on conjugation lengthFinancial support through NATO CRG and the Danish Materials research Program (MUP and SNF) is gratefully acknowledged. We wish to thank Christian Jacobsen for his help with profilometric measurements and Niels Reitzel for casting and characterizing thin films. (1996)
    Weinheim : Wiley-Blackwell
    Advanced Materials 8 (1996), S. 920-923 
    Details
    ISSN: 0935-9648
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/adma.19960081111
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  • 3
    Electronic Resource
    Electronic Resource
    On the inclusion copolymerization of some vinyl and diene monomers in different types of matricesPaper presented at the meeting of the GDCh-Fachgruppe “Makromolekulare Chemie” on “New Polymers-special properties-modern technologies” in Bad Nauheim (W-Germany) on April 14/15 1986. (1986)
    Weinheim : Wiley-Blackwell
    Angewandte Makromolekulare Chemie 145 (1986), S. 19-35 
    Details
    ISSN: 0003-3146
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Notes: The inclusion copolymerization of various vinyl monomer systems was studied in a thiourea and perhydrotriphenylene matrix while that of a disubstituted butadiene system was investigated in canals of thiourea, perhydrotriphenylene, deoxycholic acid and β-cyclodextrine. The results were compared with those obtained for the corresponding free copolymerization especially with regard to copolymer composition. In all vinyl monomer systems inclusion copolymerization leads to the same copolymer composition as is found in the free process. On the other hand, in case of the diene system, the copolymer composition of the inclusion products is remarkably different from that of the copolymers formed by the free reaction; the former is always nearly ideal statistic independent of the nature of the host. Inclusion homopolymerization can successfully be carried out with monomers where the free radical polymerization is prevented by allylic inhibition.
    Additional Material: 12 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/apmc.1986.051450102
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  • 4
    Electronic Resource
    Electronic Resource
    Hydrazin-Reaktionen, X Untersuchungen an inversionsisomeren 1-Chlor-und 1-Amino-aziridinen Abhängigkeit der 1H-C-14N-Kopplung von der Konformation des freien Elektronenpaares (1970)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 103 (1970), S. 486-495 
    Details
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Hydrazine Reactions, X Studies on Inversion-isomeric 1-Chloro-and 1-Aminoaziridines. Dependence of the 1H-C-14N-Coupling on the Konformation of the free Electron PairThe 1H-C-14N coupling depends on the conformation of the nitrogen lone-pair electrons. In 1-chloroaziridine for protons „cis“ to the nitrogen lone-pair electrons great values were found and for „trans“ protons smaller ones. The AA' BB'-system in the n.m.r. spectrum of 1-chloroaziridine is unsymmetrical. Irradiating of 14N frequency gives decoupling of 14N from other nuclei and the spectrum becomes symmetrical. In 1-amino-2-phenylaziridine the isomer with phenyl and amino group in „trans“ position is favoured. The variation of chemical shift in benzene solution of 1-amino- and 1-chloroaziridines are discussed.
    Notes: Die 1H-C-14N-Kopplung ist von der Konformation des freien Elektronenpaares abhängig und besitzt im 1-Chlor-aziridin für zum freien Elektronenpaar„cis“-ständige Protonen große, für „trans“-ständige kleine Werte. Das AA' BB'-System des NMR-Spektrums von 1-Chloraziridin ist daher unsymmetrisch und zeigt erst beim Einstrahlen der 14N-Frequenz infolge Spinentkopplung Symmetrie. 1-Amino-2-phenyl-aziridin liegt bevorzugt als das Inversionsisomere vor, in dem Phenyl- und Aminogruppe „trans“ zueinander stehen. Die Signalverschiebungen von 1-Amino-und 1-Chlor-aziridinen in Benzol werden diskutiert.
    Additional Material: 2 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cber.19701030218
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  • 5
    Electronic Resource
    Electronic Resource
    Verzweigte Zucker, VII. Synthese von verzweigten Cyan-zuckern durch Addition von Blausäure an Nitroolefin-zucker (1974)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 107 (1974), S. 3013-3019 
    Details
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Branched-chain Sugars, VII. Synthesis of Branched-chain Cyano Sugars by Addition of Hydrogencyanide to Nitroolefinic SugarsMethyl-4,6-O-benzylidene-2,3-dideoxy-3-nitro-β-D-erythro-hex-2-enopyranoside (3) adds hydrogen cyanide in the presence of catalytic amounts of triethylamine to yield preferentially the 2-cyano-3-nitro-gluco-derivative 1. In addition small amounts of the manno-compound 4 are formed. The cyanoolefin 6 is formed from 1 and 4 by elimination of nitrous acid. Terminal nitroolefinic groups react with hydrogen cyanide to yield branched-chain cyano sugars. Treatment of 8 with hydrogen cyanide gives the gulo epimer 9 and the elimination product 11. The furanose 13 was converted into the cyanoolefin 14. The deoxycyano sugars 5, 7, 10 and 12 were prepared by reduction of the cyanoolefins 6 and 11.
    Notes: Methyl-4,6-O-benzyliden-2,3-didesoxy-3-nitro-β-D-erythro-hex-2-enopyranosid (3) addiert unter Triäthylaminkatalyse wasserfreie Blausäure bevorzugt zum 2-Cyan-3-nitro-zucker 1 der gluco-Konfiguration. Die manno-Verbindung 4 wird in geringerer Menge gebildet. Durch Eliminierung von salpetriger Säure aus 1 und 4 wird das Cyanolefin 6 gebildet. Auch terminale Nitroolefingruppen reagieren mit Blausäure zu verzweigten Cyan-zuckern. Aus 8 wird das Additionsprodukt 9 der gulo-Konfiguration und das Eliminierungsprodukt 11 erhalten. Das Furanosederivat 13 liefert mit Blausäure das Cyanolefin 14. Die Cyanolefine 6 bzw. 11 lassen sich zu den Desoxycyan-zuckern 5 und 7 bzw. 10 und 12 reduzieren.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cber.19741070923
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  • 6
    Electronic Resource
    Electronic Resource
    Dimerisierung und cyclo-Trimerisierung von Naphthazarin und 5.6.7.8-Tetrahydro-chinizarin (1971)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 104 (1971), S. 1436-1454 
    Details
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Dimerisation and cyclo-Trimerisation of Naphthazarin and 5.6.7.8-TetrahydroquinizarinUpon aeration of an anerobic solution of naphthazarin (1a) in pyridin/triethanolamine in which polymeric 1.4.5.8-tetrahydroxynaphthalenes are rapidly formed, 2.2′-binaphthazarinyl (5a) and cyclo-trinaphthazarin (6a) are isolated as byproducts of 1a-polymerisates. Under the same conditions 5.6.7.8-tetrahydroquinizarin (7a) affords 5.6.7.8.5′.6′.7′.8′-Octahydro-2.2′-biquinizarinyl (9a), cyclo-tri-[5.6.7.8-tetrahydroquinizarin] (12a), its hydro derivatives 10 and 11, and small amounts of 7a polymers. During the reaction the solutions of 1a and 7a show the e.s.r. spectra of the radical anions 2a or 8b, respectively, at the beginning with increasing intensity and subsequently decreasing. Anaerobic reaction of 1.4-naphthoquinone (14) with 1.4-dihydroxynaphthalene (15b) in pyridine at room temperature gives [2.2′-binaphthalene]-1.1′.4.4′-tetraol (20a) and triphthaloylbenzene (24) in a 20a/24 product ratio which increases with increasing 15b/14 mole ratio.
    Notes: Aus einer anaeroben Lösung von Naphthazarin (1a) in Pyridin/Triäthanolamin, in der schnell polymere 1.4.5.8-Tetrahydroxy-naphthaline entstehen, werden nach Belüftung als Nebenprodukte von 1a-Polymerisaten [2.2′]Binaphthazarinyl (5a) und cyclo-Trinaphthazarin (6a) isoliert. Unter gleichen Bedingungen liefert 5.6.7.8-Tetrahydro-chinizarin (7a) neben wenig 7a-Polymeren 5.6.7.8.5′.6′.7′.8′-Octahydro-[2.2′]bichinizarinyl (9a), cyclo-Tri-[5.6.7.8-tetrahydro-chinizarin] (12a) sowie dessen Hydroderivate 10 und 11. Die Lösungen von 1a bzw. 7a zeigen während der Reaktion ESR-Spektren der Radikal-Anionen 2a bzw. 8b mit zunächst zunehmender und dann abnehmender Intensität. Aus Naphthochinon-(1.4) (14) und 1.4-Dihydroxy-naphthalin (15b) entstehen in Pyridin bei Luftabschluß und Raum-temperatur 1.4.1′.4′-Tetrahydroxy-[2.2′]binaphthyl (20a) und Triphthaloylbenzol (24), deren Produktverhältnis 20a/24 mit zunehmendem 15b/14-Molverhältnis größer wird.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cber.19711040512
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  • 7
    Electronic Resource
    Electronic Resource
    Phosphorhaltige Kohlenhydrate, VI. Synthese von Aminozuckerphosphonaten durch Addition von Dialkylphosphiten an Nitroolefin-Zucker (1973)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 106 (1973), S. 2114-2123 
    Details
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Phosphorus-containing Carbohydrates, VI. Synthesis of Aminosugarphosphonates by Way of -Addition of Dialkyl Phosphites to Nitroolefinic SugarsMethyl 4,6-O-benzylidene-2,3-dideoxy-3-nitro-β-D-erythro-hex-2-enopyranoside (1) reacts with dialkyl phosphites in the presence of a catalytic amount of triethylamine preferentially to yield the 3-nitro-2-phosphono-gluco derivatives 2 and 3. Hydrolysis of 2 to 7 and subsequent hydrogenation yields the 3-amino-2-phosphono compound 9. The corresponding addition to the α-glycoside 10 yields the gluco and manno products 11 and 13 in approximately equal amounts. Addition of dimethyl phosphite to the furanose 19 with an exocyclic nitro-vinyl group yields the 6-nitro-5-phosphono compound 20 with gluco configuration. Hydrogenation of 20 affords the 6-amino-5-phosphono sugar 22.
    Notes: Methyl-4,6-O-benzyliden-2,3-didesoxy-3-nitro-β-D-erythro-hex-2-enopyranosid (1) addiert bei Trialkylamin-Katalyse Dialkylphosphite bevorzugt zu den 3-Nitro-2-phosphono-Zuckern 2 und 3 der gluco-Konfiguration. Hydrolyse von 2 zu 7 und Hydrierung ergibt den 3-Amino-2-phosphono-Zucker 9. Die entsprechende Addition beim α-Glycosid 10 liefert das gluco-und manno-Produkt 11 und 13 zu etwa gleichen Teilen. Addition von Dimethylphosphit an die Furanose 19 mit exocyclischer Nitrovinylgruppe ergibt den 6-Nitro-5-phosphono-Zucker 20 der gluco-Konfiguration, der zum 6-Amino-5-phosphono-Zucker 22 hydrierbar ist.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cber.19731060705
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  • 8
    Electronic Resource
    Electronic Resource
    Phosphorhaltige Kohlenhydrate, VII. Synthese von α-Hydroxyphosphonaten der 1,6-Anhydrohexosen. Untersuchungen über die PCOH-Kopplung (1973)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 106 (1973), S. 2124-2139 
    Details
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Phosphorus-containing Carbohydrates, VII. Synthesis of α-Hydroxyphosphonates of 1,6-Anhydrohexoses. Investigations of PCOH Coupling.1,6-Anhydro-3,4-O-isopropylidene-β-D-lyxo-hexopyranos-2-ulose (1) reacts with dialkyl phosphites under Abramov-conditions to give predominantly the 2-phosphonato derivatives 2 and 3 having the talo configuration. 1,6-Anhydro-2,3-O-isopropylidene-β-D-lyxo-hexopyranos-4-ulose (17) affords under the same conditions predominantly the 4-phosphonates 18 and 19 also having talo configuration. The 2,3-acetal 8 obtained by rearrangement of the 3,4-acetal 2 may be oxidized to the 4-ulose 20. Abramov-reaction of 20 yields a mixture of two 2,4-diphosphonates which was separated to give 21 and 22 in the ratio 1:4 having the manno and talo configuration, respectively. The dependence of PCOH coupling on dihedral angle is discussed and a relationship proposed.
    Notes: 1,6-Anhydro-3,4-O-isopropyliden-β-D-lyxo-hexopyranos-2-ulose (1) reagiert unter Abramov-Bedingungen mit Dialkylphosphiten stark bevorzugt zu den 2-Phosphonaten 2 und 3 der talo-Konfiguration. 1,6-Anhydro-2,3-O-isopropyliden-β-D-lyxo-hexopyranos-4-ulose (17) liefert bei gleicher Reaktion stark bevorzugt die 4-Phosphonate 18 und 19 ebenfalls der talo-Konfiguration. Das durch Umlagerung aus dem 3,4-Acetal 2 gewinnbare 2,3-Acetal 8 läßt sich erneut zur 4-Ulose 20 oxidieren. Abramov-Reaktion von 20 ergibt ein trennbares Gemisch von 2,4-Bis-phosphonat-Zuckern 21 und 22 der manno- und talo-Konfiguration im Verhältnis 1:4. Die Abhängigkeit der PCOH-Kopplung vom Diederwinkel wird diskutiert und hierfür eine Beziehung vorgeschlagen.
    Additional Material: 2 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cber.19731060706
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  • 9
    Electronic Resource
    Electronic Resource
    Über Alkylmercaptomethyl-methyl- und Alkylsulfonylmethyl-malonester (1952)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 85 (1952), S. 409-415 
    Details
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Durch Umsetzung von α-halogenierten Thioäthern mit Malonsäureestern oder ihren in der Methylengruppe monoalkylierten bzw. -arylierten Abkömmlingen kann man Alkylmercaptomethyl-malonsäureester gewinnen, die sich durch Oxydation mit Persäuren in die zugehörigen Alkylsulfonylmethyl-malonsäureester überführen lassen. Das Verhalten dieser Stoffe bei der Verseifung wurde näher untersucht.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cber.19520850510
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  • 10
    Electronic Resource
    Electronic Resource
    Absorption von NOx in einer Salpetersäure-Kolonne (1994)
    Weinheim : Wiley-Blackwell
    Chemie Ingenieur Technik - CIT 66 (1994), S. 220-223 
    Details
    ISSN: 0009-286X
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Additional Material: 5 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cite.330660220
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