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  • 1
    Electronic Resource
    Electronic Resource
    Dispiro-1,2,4-trioxolane durch Ozonolyse von Cycloalkylidencycloalkanen auf Polyethylen (1991)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 124 (1991), S. 391-396 
    Details
    ISSN: 0009-2940
    Keywords: Ozonolysis ; Cycloalkylidenecycloalkanes ; Dispiro-1,2,4-trioxolanes ; Thermolysis ; Photolysis ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Dispiro-1,2,4-trioxolanes by Ozonolysis of Cycloalkylidenecycloalkanes on PolyethyleneOzonolyses of symmetrical (1b - d) and of unsymmetrical cycloalkylidenecycloalkanes (8a, b) afforded the dispiro-1,2,4-trioxolanes 4b - d and 9a, b, respectively. Their thermal decompositions gave mixtures of the cyclic ketones (3) and lactones (6). Photolyses afforded in addition to 3 and 6 the cyclic anhydrides 13, which are isomeric with the corresponding dispiro-1,2,4-trioxolanes.
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cber.19911240224
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  • 2
    Electronic Resource
    Electronic Resource
    Die Kristallstruktur von BaHg(CN)4 · 4 PyridinProfessor Walter Rüdorff zum 75. Geburtstage am 3. Oktober 1984 gewidmet (1984)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 516 (1984), S. 30-34 
    Details
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Crystal Structure of BaHg(CN)4 · 4 PyridineThe structure of the tetragonal BaHg(CN)4 · 4 Pyridine (space group I4, a = 1119.4(7), c = 1 057.9(7) pm, Z = 2, dc = 1.87 g · cm-3) contains tetrahedral Hg(CN)4 and bisdisphenoide Ba(NC)4(py)4 groups, which are linked together by Hg—CN—Ba bridges. The BaHg(CN)4 framework consists of a 3-dimensional network of all round edge-sharing tetrahedrons. The analogous strontium compound is isotype with a = 1 108.2(9) and c = 1 035.3(14) pm.
    Notes: In der Struktur des tetragonalen BaHg(CN)4 · 4 Pyridin (Raumgruppe I4, a = 1119,4(7), c = 1 057,9(9) pm, Z = 2, dc = 1,87 g · cm-3) sind tetraedrische Hg(CN)4- und bisdisphenoide Ba(NC)4(py)4-Gruppen über Hg—CN—Ba-Brücken zu einem Raumnetz verknüpft. Dem BaHg(CN)4-Gerüst liegt ein Aufbau aus allseitig eckenverknüpften Tetraedern zugrunde. Die analoge Strontium-Verbindung ist isotyp mit a = 1 108,2(9) und c = 1 035,3(14) pm.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19845160905
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  • 3
    Electronic Resource
    Electronic Resource
    α-Helical small molecular size analogues of neuropeptide Y: Structure-activity relationships (1991)
    New York : Wiley-Blackwell
    Biopolymers 31 (1991), S. 613-619 
    Details
    ISSN: 0006-3525
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: C-terminal analogues of neuropeptide Y (NPY) of small molecular size have been synthesized. The influence of chain length, single or multiple amino acid substitution, and segment substitutions on receptor binding, pre- and postsynaptic biological activity, and conformational properties have been investigated. Receptor binding and in vivo assays revealed biological activity for NPY Ac-25-36 that increased with increasing α-helicity. In attempts to stabilize the α-helical content, three independent types of modified NPY Ac-25-36 analogues were synthesized. Strong agonistic activities could be detected in a series of discontinuous analogues, which are constructs of N-terminal parts linked via different spacer molecules to C-terminal segments. One of the most active molecules was NPY 1-4-Aca-25-36 (Aca, ε-aminocaproic acid). For the first time conformational properties of a series of small NPY analogues have been investigated by CD, and correlated with biological activity and receptor binding. A C-terminal dodecapeptide segment of NPY with an amount of 50% substitution to the native C-terminal sequence of NPY was found to exhibit significant receptor binding.
    Additional Material: 6 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/bip.360310605
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  • 4
    Electronic Resource
    Electronic Resource
    Structure-activity relationships of neuropeptide Y analogues with respect to Y1 and Y2 receptors (1995)
    New York : Wiley-Blackwell
    Biopolymers 37 (1995), S. 123-142 
    Details
    ISSN: 0006-3525
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Secondary structure investigations, affinities, and activities of neuropeptide Y analogues with respect to the Y1 and the Y2 receptor are reviewed. The results are discussed with respect to the different prerequisites for affinities to both receptor subtypes. The results from a systematic scanning of the hormone using L-alanine and from a large variety of discontinuous and cyclic analogs suggest that two different conformations of neuropeptide Y are adopted at the Y1 and Y2 receptors. Whereas a C-terminal turn structure is suggested for Y1 receptor affinity, an α-helical conformation of the C-terminus is afforded for good binding to the Y2 receptor. © 1994 John Wiley & Sons, Inc.
    Additional Material: 9 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/bip.360370207
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  • 5
    Electronic Resource
    Electronic Resource
    A new approach to secondary structure evaluation: Secondary structure prediction of porcine adenylate kinase and yeast guanylate kinase by CD spectroscopy of overlapping synthetic peptide segments (1997)
    New York : Wiley-Blackwell
    Biopolymers 41 (1997), S. 213-231 
    Details
    ISSN: 0006-3525
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: A new approach for evaluating the secondary structure of proteins by CD spectroscopy of overlapping peptide segments is applied to porcine adenylate kinase (AK1) and yeast guanylate kinase (GK3).One hundred seventy-six peptide segments of a length of 15 residues, overlapping by 13 residues and covering the complete sequences of AK1 and GK3, were synthesized in order to evaluate their secondary structure composition by CD spectroscopy.The peptides were prepared by solid phase multiple peptide synthesis method using the 9-fluorenylmethoxycarbonyl/tert-butyl strategy. The individual peptide secondary structures were studied with CD spectroscopy in a mixture of 30% trifluoroethanol in phosphate buffer (pH 7) and subsequently compared with x-ray data of AK1 and GK3.Peptide segments that cover α-helical regions of the AK1 or GK3 sequence mainly showed CD spectra with increasing and decreasing Cotton effects that were typical for appearing and disappearing α-helical structures. For segments with dominating β-sheet conformation, however, the application of this method is limited due to the stability and clustering of β-sheet segments in solution and due to the difficult interpretation of random-coiled superimposed β-sheet CD signals.Nevertheless, the results of this method especially for α-helical segments are very impressive. All α-helical and 71% of the β-sheet containing regions of the AK1 and GK3 could be identified. Moreover, it was shown that CD spectra of consecutive peptide content reveal the appearance and disappearance of α-helical secondary structure elements and help localizing them on the sequence string. © 1997 John Wiley & Sons, Inc. Biopoly 41: 213-231, 1997
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
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  • 6
    Electronic Resource
    Electronic Resource
    Phosphororganische Verbindungen, XIX. Reduktion von Phosphorverbindungen mit AlkalimetallenHerrn Prof. Dr. Dr. h. c. Stefan Goldschmidt zum 70. Geburtstag gewidmet (1959)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 92 (1959), S. 2088-2094 
    Details
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Phosphorhalogen-Verbindungen, quartäre Phosphoniumsalze, Phosphorsauerstoff- und Phosphorschwefel-Verbindungen können mit feinverteiltem Natrium zu Natriumphosphiden bzw. Phosphinen reduziert werden. Aus Natrium-phosphiden und Alkylhalogeniden sind quartäre Phosphoniumsalze leicht zugänglich.
    Additional Material: 1 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cber.19590920920
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  • 7
    Electronic Resource
    Electronic Resource
    Über Pentacarbonylmangan- und -rheniumverbindungen: Dipolmomente und C—O-Valenzschwingungsfrequenzen113. Mitteil. Über Metallcarbonyle von W. HIEBER und Mitarbb., 112. Mitteil.: W. BECK, W. HIEBER und G. BRAUN, Z. anorg. allg. Chem. 308 [1961], im Erscheinen.In Erinnerung an die gemeinsamen Jahre in Heidelberg Hans Kautsky zum 70, Geburtstag in Freundschaft gewidmet von W. Hieber (1961)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 94 (1961), S. 862-872 
    Details
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Im Anschluß an frühere Untersuchungen über Organomangan- und -rheniumpentacarbonyle RM(CO)5 (M = Mn, Re; R = Alkyl, Aryl, Acyl) konnten weitere Manganverbindungen dieses Typs dargestellt werden. Auf Grund des Vergleichs der Dipolmomente sowie von IR-aktiven C—O-Valenzfrequenzen werden die Bindungsverhältnisse verschiedener Mangan- und Rheniumpenta-carbonyle diskutiert.
    Additional Material: 3 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cber.19610940402
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  • 8
    Electronic Resource
    Electronic Resource
    Notiz über Methylkobalttetracarbonyl (1964)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 97 (1964), S. 2098-2099 
    Details
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cber.19640970749
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  • 9
    Electronic Resource
    Electronic Resource
    Perfluorierte Acyl-eisennitrosylcarbonyle RfCOFe(CO)(NO)(P(C6H5)3) (1965)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 98 (1965), S. 307-310 
    Details
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Mit perfluorierten Carbonsäureanhydriden geht Natrium-tricarbonylnitrosylferrat im Gegensatz zu anderen Na-Carbonylmetallaten keine Reaktion ein, mit den betreffenden Perfluorcarbonsäuren selbst bilden sich jedoch bei Anwesenheit von Triphenylphosphin stabile Acylverbindungen gemäß (Rf = CF3 und C2F5): \documentclass{article}\pagestyle{empty}\begin{document}$${\rm Na[Fe}\langle {\rm CO}\rangle _{\rm 3} \langle {\rm NO}\rangle] + 2{\rm R}_{\rm f} {\rm CO}_{\rm 2} {\rm H + 2P(C}_{\rm 6} {\rm H}_{\rm 5} {\rm)}_{\rm 3} \to {\rm R}_{\rm f} {\rm CO}_{\rm 2} {\rm N}_{\rm a} + {\rm H}_{\rm 2} {\rm O + R}_{\rm f} {\rm COF}_{\rm e} ({\rm CO})\langle {\rm NO}\rangle ({\rm P(C}_{\rm 6} {\rm H}_{\rm 5})_3)_2 $$\end{document} Mit höheren Perfluorcarbonsäuren oder schwächeren Liganden wie As(C6H5)3 (L) entsteht keine derartige Acylverbindung, sondern es bilden sich unter Disproportionierung Derivate von Eisennitrosylcarbonyl Fe(NO)2L2.  -  Bei der Umsetzung des Natrium-tricarbonylnitrosylferrats mit Trifluoressigsäure und dem im Vergleich zum Triphenylphosphin stärker basischen Tricyclohexylphosphin entsteht das Phosphoniumsalz [HP(C6H11)3][Fe(CO)3(NO)].
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cber.19650980138
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  • 10
    Electronic Resource
    Electronic Resource
    Alkinylerbindungen on übergangsmetallen, XXII. Darstelllung eines Phenyläthinylkomplexes von Kupfer(0) (1963)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 96 (1963), S. 3302-3305 
    Details
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Reduktion on K2[Cu(C2C6H5)3] mit Lithium in flüssigem Ammoniak und anschließende Fällung mit Ba(SCN)2 liefert, luft- und feuchtigkeits- empfindliches Barium-tris(phenyläthinyl)-cuprat(0) Ba3[Cu(C2C6H5)3]2. Das IR-Spektrum der Verbindung ist im NaCl-Bereich identisch mit dem des zu Vergleichszwecken dargestellten hellgelben Kupfer(I)-Komplexes Ba[Cu(C2C6H5)3]. Dieser Befund sowie der Diamagnetismus machen eine zweikernige Struktur des Kupfer(0)-Anions [C6H5·C≡C)3 Cu-Cu(C≡C·C6H5)3]6⊖ wahrscheinlich.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cber.19630961229
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