ALBERT

All Library Books, journals and Electronic Records Telegrafenberg

X
feed icon rss

Your email was sent successfully. Check your inbox.

An error occurred while sending the email. Please try again.

Proceed reservation?

Export
Filter
  • Wiley-Blackwell  (23)
  • 1985-1989  (8)
  • 1980-1984  (15)
  • 1
    Electronic Resource
    Electronic Resource
    Zur Konfiguration der 1,3-Dichlor-2-methyl-1-propene (1983)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 116 (1983), S. 522-526 
    Details
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: On the Configuration of the 1,3-Dichloro-2-methyl-l-propenesDetermination of the configurations of 1,3-dichloro-2-methyl-1-propenes (1) was performed by 1H and 13C NMR spectroscopy using the isomer pairs of 1,3-dichloro-1-propenes (2), 1-chloro-2-methyl-1-propene-3-ols (3) and 1-chloro-1-propene-3-ols (4) as reference compounds. The chemical shifts, vicinal coupling constants, relative LIS value and NOE effects were in an unambiguous agreement with the (Z)-configuration of the lower-boiling isomer of 1.
    Notes: Die Konfigurationen von 1,3-Dichlor-2-methyl-1-propenen (1) werden mittels 1H- und 13C-NMR-Spektroskopie zugeordnet. Als Vergleichssubstanzen dienten die Isomeren von 1,3-Dichlor-1-propen (2), 1-Chlor-2-methyl-1-propen-3-ol (3) und 1-Chlor-1-propen-3-ol (4). Die chemischen Verschiebungen, vicinalen Kopplungskonstanten, relativen LIS-Werte und NOE-Effekte stehen mit der (Z)-Konfiguration des niedriger siedenden Isomeren von 1 eindeutig im Einklang.
    Additional Material: 5 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cber.19831160213
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 2
    Electronic Resource
    Electronic Resource
    5-Aza(Oxa, Thia)-2,8-dithia-1-stanna(II)-bicyclo[3.3.01,5]octane Intramolekular basenstabilisierte Stannylene (1983)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 502 (1983), S. 158-164 
    Details
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: 5-Aza(oxa, thia)-2, 8-dithia-1-stanna(II)-bicyclo[3.3.01,5]octanes  -  Intramolecular Stabilized StannylenesBy the reaction of tin(II) butoxide with mercaptanes of the general type E(CH2—CH2SH)2 (E = N-t-Bu, NMe, O, S) at temperatures up to 50°C the 5-aza(oxa, thia)-2, 8-dithia-1-stanna(II)-bicyclo[3.3.01,5]octanes I - IV are obtained in high yields. The compounds are monomeric in solution. Contrary at higher reaction temperatures (80°C) the spiro-compounds of the type [E(CH2CH2S)2]2Sn (V - VIII) are formed. Some typical stannylene reactions of I - IV with BF3, Cr(CO)6, Br2, and PhS—SPh show the high reactivity of the compounds. Their structure is investigated by 1H, 13C, and 119Sn n.m.r., i.r., and Mössbauer spectroscopy.
    Notes: Durch Umsetzung von Zinn(II)-butoxid mit Mercaptanen des allgemeinen Typs E(CH2CH2SH)2 (E = N-t-Bu, NMe, O, S) werden bei Temperaturen bis 50°C die 5-Aza(Oxa, Thia)-2, 8-dithia-1-stanna(II)-bicyclo[3.3.01,5]octane in hohen Ausbeuten erhalten. Die Verbindungen sind monomer in Lösung. Bei höheren Reaktionstemperaturen (80°C) resultieren dagegen vorzugsweise die Spiroverbindungen des Typs [E(CH2CH2S)2]2Sn (V - VIII). Einige typische Stannylenreaktionen von I - IV mit BF3, Cr(CO)6, Br2 und PhS—SPh belegen die hohe Reaktivität der Verbindungen. Ihre Struktur wird durch 1H-, 13C-, 119Sn-NMR, IR- und Mößbauer-Spektren bewiesen.
    Additional Material: 4 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19835020720
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 3
    Electronic Resource
    Electronic Resource
    Darstellung und Eigenschaften von Trinorbornylbor-Verbindungen (1982)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 494 (1982), S. 144-150 
    Details
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Synthesis and Properties of Trinorbornyl Boron CompoundsTris(1-norbornyl), Tris(2-norbornyl), and Tris(7-norbornyl) boron were synthesized from boron trifluoride diethylether and 1-norbornyl lithium or 2- and 7-norbornyl magnesium halides respectively. The compounds were characterized by the IR-, 13C-, 11B-NMR, and mass spectra. Furthermore 1-norbornyl lithium was isolated in the crystalline state and investigated in detail.
    Notes: Tris(1-norbornyl)-, Tris(2-norbornyl)- und Tris(7-norbornyl)bor1 wurden aus Bortrifluorid-diethylether und 1-Norbornyllithium bzw. 2- und 7-Norbornylmagnesiumhalogeniden synthetisiert. Eine nähere Charakterisierung erfolgte durch IR-, 13C- und 11B-NMR- sowie Massenspektren. 1-Norbornyllithium wurde in kristalliner Form erhalten; die Verbindung liegt in Benzol tetramer vor. Das 13C-NMR-Spektrum wird angegeben.
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19824940119
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 4
    Electronic Resource
    Electronic Resource
    Intramolekulare Beweglichkeit von Phosphin-3η-allylpalladiumchlorid-Komplexen (1982)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 494 (1982), S. 189-195 
    Details
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Intramolecular Mobility of Phosphin-3η-allyl Palladium Chloride ComplexesThe diastereomers of the complexes cis- and trans-2.3-diphenyl-1.3-oxaphosphorinan-3η-allyl palladiumchloride interchange. The activation parameters of the diastereomerization are estimated by line-shape analysis of the 31P - NMR signals.The exchange of allyl protons is described by 16 permutations involved in three graphes of the proposed seven modes of intramolecular movement.The cross-peaks in the 2D-exchange-1H - NMR spectrum display the exchanging protons.The results suggest a π-σ-transition together with a trigonal-bipyramidal arrangement of ligands in the transition state.
    Notes: Die Diastereomere der Komplexe cis- und trans-2,3-Diphenyl-1,3-oxa-phosphorinan-3η-allylpalladiumchlorid wandeln sich ineinander um. Die Aktivierungsparameter für diese Diastereomerisierung werden durch Linienformanalyse der 31P-NMR-Signale bestimmt.Der Positionswechsel der Allylprotonen wird durch 16 Permutationen beschrieben und in je drei Graphen den sieben vorgeschlagenen intramolekularen Bewegungsmechanismen zugeordnet. Aus den cross-peaks im 2D-Austausch-1H - NMR-Spektrum werden die miteinander im Positionswechsel befindlichen Protonen bestimmt.Die Ergebnisse sprechen für einen π-σ-Übergang mit trigonalbipyrymidaler Ligandenanordnung im Übergangszustand.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19824940124
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 5
    Electronic Resource
    Electronic Resource
    Cis- und trans-1-Phosphabicyclo[4.4.0]decanProfessor Rudolf Hoppe zum 65. Geburtstage am 29. Oktober 1987 gewidmet (1987)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 553 (1987), S. 136-146 
    Details
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Cis- and trans-1-Phosphabicyclo[4.4.0]decaneA mixture of cis-(5a) and trans-1-phosphabicyclo [4.4.0] decane 5b has been prepared by free-radical cyclization of (CH2 = CH—CH2—CH2)2CH—PH2 10. The isomers could be separated in a pure state. Stereostructures have been assigned by 13C n.m.r. at 153 - 302 K. Equilibration of 5a and 5b by u.v. irradiation gave ⊲G°35 ≍ 0 kJ ° mol-1 · Activation parameters for ring inversion of “cis” stereoisomer 5a and its “cis” P-sulfid 17a are found to be ΔG° = 41.9 kJ · mol-1 and 39.7 kJ · mol-1, respectively. Treatment of 5a and 5b with H2O2, sulfur, selenium, HSO3F, CH3I, CS2, and Ni(CO)4, respectively, yield the corresponding derivatives. 1H, 13C, 31P, 77Se n.m.r. and i.r. data are reported.
    Notes: Durch radikalische Cyclisierung von (CH2=CH—CH2—CH2)2CH—PH2 10 wird eine Mischung von cis- (5a) und trans-1-Phosphabicyclo[4.4.0]decan (5b) erhalten. Nach Trennung in die reinen Stereoisomeren konnten die Strukturen durch 13C-NMR-Spektren bei 153 - 302 K zugeordnet werden. Gleichgewichtseinstellungen 5a ⇌ 5b durch UV-Bestrahlung ergaben bei 35°C einen ⊲G°-Wert nahe Null. Die Aktivierungsparameter für die Ringinversion von 5a und seinem Sulfid 17a betragen ⊲G = 41,9 kJ · mol-1 bzw. 39,7 kJ · mol-1. Umsetzungen von 5a und 5b mit H2O2, Schwefel, Selen, HSO3F, CH3I, CS2 und Ni(CO)4 führten zu den entsprechenden Derivaten. Werte der 1H-, 13C-, 31P- und 77Se-NMR-Spektren sowie IR-Daten der LNi(CO)3 (L = 5a, 5b) werden mitgeteilt.
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19875531016
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 6
    Electronic Resource
    Electronic Resource
    1H NMR study of 2,8-dithia-1,5-dielementbicyclo[3.3.0]octanes (1983)
    Chichester : Wiley-Blackwell
    Organic Magnetic Resonance 21 (1983), S. 315-318 
    Details
    ISSN: 0030-4921
    Keywords: Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: The analysis of the 1H NMR spectra of 2,8-dithia-1,5-diphosphabicyclo[3.3.0]octane, 2,8-dithia-1-phospha-5-azabicyclo[3.3.0]octane and 2,8-dithia-1-arsa-5-phosphabicyclo[3.3.0]octane is supported by means of 2D- J-resolved NMR measurements. The spectra suggest a preferred conformer with strong puckering of the fused five membered rings.
    Additional Material: 6 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/omr.1270210506
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 7
    Electronic Resource
    Electronic Resource
    Cell cycle and cyclic AMP-dependent phosphorylation of plasma membrane proteins p14 and p24: Defects in smooth surface transformed cells (1983)
    New York, N.Y. : Wiley-Blackwell
    Journal of Cellular Biochemistry 23 (1983), S. 203-209 
    Details
    ISSN: 0730-2312
    Keywords: cell cycle ; cytoplasmic plasma membrane surface ; control of cell proliferation ; proadipocyte stem cells ; Life and Medical Sciences ; Cell & Developmental Biology
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology , Chemistry and Pharmacology , Medicine
    Notes: Two proteins which are localized to the cytoplasmic surface of the plasma membrane, p14 and p24, undergo cyclic AMP-dependent phosphorylation in rapidly growing nontransformed murine embryo cells. In this cell system, growth arrest in the G1 phase of the cell cycle induced by growth factor deprivation is associated with the reversible loss in ability to phosphorylate these substrates. By contrast Simian virus 40 and methylcholanthrene transformed cells show both defective G1 growth control and defects in their ability to phosphorylate p14 and p24 under all tested growth conditions. These data suggested a correlation between defects in the physophorylation of p14 and p24 and defects in the ability of transformed cells to G1 growth arrest. The results of the current studies by contrast show that 3T3 T proadipocytcs which have been transformed by the smooth surface tumorigenesis method show different characteristics. They retain the ability to G1 growth arrest in serum-deficient medium. They show cyclic AMP-dependent phosphorylation of p14 and p24 during exponential growth. They do not, however, down regulate p14 and p24 phosphorylation in association with G1 growth arrest. These observations suggest that neoplastic transformation is not necessarily associated with absolute defects in the ability to phosphorylate p14 and p24. Rather, the results of the current study suggest that the inability to modulate the cyclic AMP-dependent phosphorylation of plasma membrane p14 and p24 proteins during the G1 phase of the cell cycle may be more tightly associated with neoplastic transformation.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jcb.240230117
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 8
    Electronic Resource
    Electronic Resource
    Reaction of Cyclic Thioureas with 2-Benzylidenecycloalkanones (1987)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 120 (1987), S. 1449-1450 
    Details
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: BF3. OEt2-catalyzed reaction of cyclic thioureas (1) with 2-benzylidenecycloalkanones (2) afforded tricyclic 1,3-thiazines (3, 4). The progress of the reactions was found to depend on the ring size of both 1 and 2.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cber.19871200827
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 9
    Electronic Resource
    Electronic Resource
    Alkali-Phosphorverbindungen und ihr reaktives Verhalten. 79. NMR-Untersuchungen an Alkali-organophosphiden. I (1982)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 495 (1982), S. 115-119 
    Details
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Alkali Phosphorus Compounds and their Reactivity. 79. NMR Investigations of Alkali Organophosphides. IThe 31C and 31P NMR spectra display a further separation of ion-pairs of alkali-organophosphides in THF solution after addition of cryptandes . An exception presents LiP(Ph)2, T1—13C-NMR measurements suggest a tetrameric structure in THF.
    Notes: Anhand der 13C- und 31P-NMR-Daten läßt sich zeigen, daß sich die Ionenpaare der Alkali-organophosphide in THF durch Zugabe von Kryptanden entsprechend weiter trennen lassen. Eine Ausnahme bildet LiP(Ph)2, das aufgrund von T1—13C-NMR-Messungen eine tetramere Struktur in THF aufweist.
    Additional Material: 2 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19824950111
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 10
    Electronic Resource
    Electronic Resource
    31P- und 195Pt-NMR-Untersuchungen an Diplatin(I)-Komplexen des Typs [Pt2(μ-SPR2)2L2] (L = PR3, PhP(OPh)2, P(OPh)3, CNR)VIII. Mitteilung aus der Reihe Sekundäre Phosphinochalkogenide; VII. Mitteilung s. (1983)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 504 (1983), S. 117-127 
    Details
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: 31P and 195Pt N.M.R. Investigations on Diplatinum (I) Complexes of the Type [Pt2(μ-SPR2)2L2] (L = PR3, PhP(OPh)2, P(OPh)3, CNR)31P-, 195Pt-chemical shifts and 195Pt-31P- resp. 31P-31P-coupling constants of a series of doubly bridged diplatinum(I) complexes are reported. 31P-coordination chemical shifts of the terminal ligands of complexes of type [Pt2(μ-SPR2)2(P′R3′)2] and some of the various coupling constants are strongly influenced by the π-acceptor strength of these ligands. J(195Pt-195Pt) is found to change the sign among the series of complexes investigated. Thermal singlett triplet exitation giving rise to the paramagnetism of these complexes observed by preliminary EPR-measurements and confirmed by EHT-calculations is deduced from the large values of 2J(P-P′) and 3J(P′P′) as well as the unusually high temperature dependence of some coupling constants and other NMR features. The chemical stability of the doubly bridged core, the coordination shifts of the bridging phosphorus atoms and EHT-calculations suggest a view of aromaticity of the [Pt2(μ-SPR2)2](M-M) unit of these complexes.
    Notes: Es werden 31P-, 195Pt-chemische Verschiebungen und 195Pt31P-Kopplungskonstanten einer Reihe von doppelt verbrückten Diplatin(I)-Komplexen mitgeteilt. 31P-koordinationschemische Verschiebungen der ternären Liganden von Komplexen des Typs [Pt2(μ-SPR2)2(P′R3′)2] und verschiedene Kopplungskonstanten werden stark von der π-Akzeptor-Stärke dieser Liganden beeinflußt. J(195P-195Pt) wird innerhalb der Reihe der untersuchten Komplexe mit wechselndem Vorzeichen gefunden. Aus den großen Werten von 2J(Pt-P′) und 3J(P′P′) sowie der ungewöhnlich starken Temperaturabhängigkeit einiger Kopplungskonstanten und anderen NMR-Eigenschaften wird auf Paramagnetismus dieser Komplexe aufgrund thermischer Singlett-Triplett-Anregung geschlossen, der in vorläufigen EPR-Messungen gefunden und durch EHT-Rechnungen gestützt wird. Die chemische Stabilität des doppelt verbrückten Kerns, die koordinationschemischen Verschiebungen der Brückenphosphoratome und EHT-Rechnungen weisen auf Aromatizität der [Pt2(μ-SPR2)2](M-M)-Einheit dieser Komplexe hin.
    Additional Material: 5 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19835040915
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
Close ⊗
This website uses cookies and the analysis tool Matomo. More information can be found here...