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  • 1
    Electronic Resource
    Electronic Resource
    (2-Chlorobenzyl)tris(2-pyridinethiolato)tin(IV) (2001)
    Oxford [u.a.] : International Union of Crystallography (IUCr)
    Acta crystallographica 57 (2001), S. 40-41 
    Details
    ISSN: 1600-5759
    Source: Crystallography Journals Online : IUCR Backfile Archive 1948-2001
    Topics: Chemistry and Pharmacology , Geosciences , Physics
    Notes: In the title compound, (2-chlorobenzyl)tris(pyridine-2-thiolato)-κ2N,S;κ2N,S;κS-tin(IV), [Sn(C7H6Cl)(C5H4NS)3], two of the three pyridine-2-thiolato ligands (SPy) are bidentate and one is monodentate. The bonding C atom of the 2-chlorobenzyl group, the S atom of the monodentate SPy and the S and N atoms of the two bidentate SPy ligands form a distorted octahedron around the Sn atom. The three S atoms and the N atom of one of the bidentate SPy ligands occupy the equatorial positions, while the N atom of the second bidentate SPy ligand and the C(CH2) atom are axial. The axial N—Sn—C angle of 157.9 (1)° demonstrates the heavy distortion of the octahedron.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1107/S0108270100015146
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  • 2
    Electronic Resource
    Electronic Resource
    Oxydationen organischer Verbindungen in wäßriger und methanolischer Lösung mit Phosphatoblei(IV)-säuren (1969)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 102 (1969), S. 872-877 
    Details
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Verschiedene Typen organischer Verbindungen lassen sich in gezielter und einfacher Weise in wäßriger oder methanolischer Lösung mit Phosphatoblei (IV)-säuren („Blei(IV)-phosphat“) oxydieren. Die bisher untersuchten Reaktionen, Diolspaltung, Dehydrierung und die formale Addition von OH-Gruppen an Doppelbindungen, der eine Diolspaltung folgen kann (Spaltung des Alkens an der Doppelbindung), verlaufen eindeutig und ergeben Ausbeuten über 80%.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cber.19691020320
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  • 3
    Electronic Resource
    Electronic Resource
    Organoblei-Verbindungen (Y—C6H4)nPbX4-n mit reaktiven Substituenten Y (1971)
    Weinheim : Wiley-Blackwell
    Zeitschrift für die chemische Industrie 83 (1971), S. 916-916 
    Details
    ISSN: 0044-8249
    Keywords: Chemistry ; General Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/ange.1971083221105
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  • 4
    Electronic Resource
    Electronic Resource
    A 119Sn Mössbauer spectroscopic study on complexes of di-and tri-organotin(IV) moieties with 2-mercaptoethanesulfonates, in the solid state and in aqueous solution (1988)
    New York, NY [u.a.] : Wiley-Blackwell
    Applied Organometallic Chemistry 2 (1988), S. 457-461 
    Details
    ISSN: 0268-2605
    Keywords: Organotin ; 2-mercaptoethanesulfonates ; solid state ; solution ; Mössbauer spectra ; Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: The configuration of the bonding environment of tin in the complexes [R2Sn(SCH2CH2SO3)2]2- (R = Me, Ph) and [Me3Sn(SCH2CH2SO3)]- has been determined to be tetrahedral both in the solid state and in aqueous solution (for the methyl derivatives). The coordination number of tin increases to five in aqueous solutions for the Me2Sn(IV) complexes in Hepes buffer (N-2-hydroxyethylpiperazine-N′-2-ethanesulfonic acid; at least in fivefold excess, at pH 7.4) due to coordination by the tertiary amino nitrogen atom. No effect is detected due to the surfactant 2-hydroxypropylcellulose concerning both coordination to tin and influence on the Mössbauer parameters. The stoichiometry of mixed complex formation in aqueous solution of Me2Sn(IV), 2-mercaptoethanesulfonate and Hepes is 1:2:1, according to a procedure of ‘Mössbauer titration’. All complexes in aqueous solution undergo slow lysis of the tin-sulfur bonds. Structural assignments have been generally effected on the basis of the magnitude of experimental values of Mössbauer nuclear quadrupole splittings, measured at 77 K for both solid and frozen aqueous absorbers, and comparison with data calculated by the point-charge model approach.
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/aoc.590020508
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  • 5
    Electronic Resource
    Electronic Resource
    Nonaphenyltristiboxan-1,5-diyl-disulfonateDiese Arbeit wurde vom Fonds der Chemischen Industrie gefördert. (1987)
    Weinheim : Wiley-Blackwell
    Zeitschrift für die chemische Industrie 99 (1987), S. 948-949 
    Details
    ISSN: 0044-8249
    Keywords: Chemistry ; General Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/ange.19870990930
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  • 6
    Electronic Resource
    Electronic Resource
    Synthesis and spectroscopic characterization of dimethylgermanium derivatives of dipeptides, crystal structure of dimethylgermanium glycylglycinate and in vivo effects of dimethylgermanium glycylglycinate against murine leukemia P388 (1989)
    New York, NY [u.a.] : Wiley-Blackwell
    Applied Organometallic Chemistry 3 (1989), S. 177-182 
    Details
    ISSN: 0268-2605
    Keywords: Organogermanium ; dipeptide ; structure ; toxicity ; Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Dimethylgermanium derivatives of dipeptides, Me2GeAA (H2AA = H2glygly, H2glyala, H2glyval, H2glyleu, H2glymet) have been obtained by the reaction of Me2GeBr2 with H2AA in the presence of triethylamine. The crystal structure of Me2Geglygly has been determined by single-crystal X-ray diffraction. The dipeptide is tridentately coordinated to germanium, which has a distorted trigonal bipyramidal environment. From infrared and Raman data, analogous molecular structures are inferred for the other dimethylgermanium derivatives of dipeptides. 1H NMR measurements show that Me2Geglygly is completely hydrolyzed in aqueous solution to give H2glygly and (Me2Geo)x.In vivo tests with Me2Geglygly showed no toxic or antitumor activity against murine leukemia P388.
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/aoc.590030210
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  • 7
    Electronic Resource
    Electronic Resource
    Synthesis of tri-n-butyltin taurocholate, taurodeoxycholate and glycocholate (1987)
    New York, NY [u.a.] : Wiley-Blackwell
    Applied Organometallic Chemistry 1 (1987), S. 355-358 
    Details
    ISSN: 0268-2605
    Keywords: Tri-n-butyltin taurocholate ; Tri-n-butyltin taurodeoxycholate ; Tri-n-butyltin glycocholate ; Bis(tri-n-butyltin) oxide ; Synthesis ; Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: The bile acids, taurocholic, taurodeoxycholic and glycocholic acid, were reacted with bis(tri-n-butyltin) oxide (TBTO) to form 1:1 derivatives. The water of reaction was removed with 2, 2-dimethoxypropane or by azeotropic distillation with benzene. The compounds were characterized by 13C and 119Sn NMR, IR, elemental analysis, molecular weight determination, DTA, TGA, and conductance measurements. The data indicated that tri-n-butyltin glycocholate forms a covalent ester, tin being tetracoordinated. The taurocholic and taurodeoxycholic acid derivatives contain one molecule of coordinated water. They partially dissociate in polar solvents. The taurocholic and glycocholic acid derivatives were tested in vitro as anticancer agents and exhibited ED50 in the 0.2-0.4 ppm (mg kg-1) range against KB epidermoid tumor and P-388 leukemia using NCI protocols.
    Additional Material: 2 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/aoc.590010409
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  • 8
    Electronic Resource
    Electronic Resource
    Di- and Tri-organotin(IV) Complexes of N-Acetyltriglycine and N-Benzoyltriglycine: Synthesis and Spectroscopic Characterization (1996)
    New York, NY [u.a.] : Wiley-Blackwell
    Applied Organometallic Chemistry 10 (1996), S. 779-790 
    Details
    ISSN: 0268-2605
    Keywords: organotin ; N-acetyltriglycine ; N-benzoyltriglycine ; Mössbauer ; Chemistry ; Industrial Chemistry and Chemical Engineering
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Di- and tri-organotin(IV) derivatives of N-acetyltriglycine and N-benzoyltriglycine (HA) were obtained by refluxing equimolar mixtures of the ligand and the organotin(IV) oxide or hydroxide in methanol or acetone. According to the spectroscopic data, triorganotin(IV) derivatives adopt a trigonal-bipyramidal structure in which the planar R3SnIV unit is bonded by a monodentate carboxylate group and a donor group, presumably the amide C=O. The reaction of HA with the appropriate diorganotin(IV) compounds gave both dicarboxylates R2SnA2, with six-coordinated tin, and dimeric tetraorganodistannoxanes {[R2SnA]2O}2, in which the tin atoms are essentially five-coordinated.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
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  • 9
    Electronic Resource
    Electronic Resource
    Relationship of cytotoxic groups in organotin molecules and the effectiveness of the compounds against leukemia (1988)
    New York, NY [u.a.] : Wiley-Blackwell
    Applied Organometallic Chemistry 2 (1988), S. 65-72 
    Details
    ISSN: 0268-2605
    Keywords: Organotin compounds ; P388 leukemia ; cytotoxicity ; thymus gland ; Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Cytotoxicity of organotin compounds is assessed and their effectiveness against leukemia is discussed. The functional groups attached to the tin atom in organotin compounds control the cytotoxicity of the compound towards the thymus gland. The four organotin moieties which have the greatest toxic effect upon the thymus gland are the tri-n-butyltin, di-n-butyltin, tri-n-propyltin and di-n-octyltin groups. Compounds containing these groups also exhibit the poorest test-control ratio (T/C) values when tested as anti-cancer agents against leukemic mice using NCI protocol.
    Additional Material: 4 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/aoc.590020109
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  • 10
    Electronic Resource
    Electronic Resource
    Stannacycloalkyl and stannepinyl derivatives of dipeptides (1994)
    New York, NY [u.a.] : Wiley-Blackwell
    Applied Organometallic Chemistry 8 (1994), S. 113-117 
    Details
    ISSN: 0268-2605
    Keywords: Organotin ; stannacycloalkyl compounds ; dipeptides ; Mössbauer ; NMR ; IR ; Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Stannacyclohexyl and stannacycloheptyl derivatives of dipeptides (CH2)nSnAA · xH2O (H2AA = H2GlyGly, with n = 5, x = 2 or n = 6, x = 1; H2AA = H2GlyAla, H2GlyVal, H2GlyMet, with n = 5, 6, x = 1) and stannepinyl glycylglycinate monohydrate have been obtained by the reaction of (CH2)nSnCl2 or stannepinyl dichloride with Na2AA. According to infrared and 119Sn Mössbauer data of the solid compounds, AA acts as a tridentate ONN ligand and tin has a trigonalbipyramidal environment. An analogous structure has been inferred from 1H, 13C, and 119Sn NMR data for the undissociated molecules in methanol solution.
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/aoc.590080206
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