ALBERT

All Library Books, journals and Electronic Records Telegrafenberg

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  (3)
  • 2010-2014
  • 1980-1984  (3)
Collection
Publisher
Years
Year
  • 1
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Synthesis of Methyl(trimethylsilylamino) fluoroalkylphosphites and Methylamino-bis(fluoroalkylphosphites)Fluorochlorophosphites, ROPFCl I, react with heptamethyldisilazane with replacement of a trimethylsilyl group to give methyl(trimethylsilylamino)fluoroalkylphosphites, CH3N-(PFOR)(SiMe3) II. The introduction of a second PFOR substituent in II by further reaction with I has been possible. Thus formation of the previously unknown methylamino-bis(fluoroalkylphosphites), CH3N(PFOR)2 III, was observed. Compounds of type III exist in a meso form as well as in a racemic pair. 19F and 31P n.m.r. spectra are discussed.
    Notes: Fluorochlorophosphite, (ROPFCl) I, reagieren mit Heptamethyldisilazan unter Substitution einer Trimethylsilylgruppe zu Methyl-(trimethylsilylamino)-fluoroalkylphosphiten, CH3N(PFOR)(SiMe3) II. Unter drastischeren Bedingungen kann mit I auch die zweite Trimethylsilylgruppe substituiert werden und man erhält die bisher unbekannten Methylamino-bis(fluoroalkylphosphite), CH3N(PFOR)2 III. Letztere liegen in einer meso-Form bzw. als Racemat vor. Die 19F- und 31P-NMR-Spektren werden diskutiert.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 2
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 483 (1981), S. 75-85 
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Correlation between Mössbauer Isomer Shifts and ESCA Binding EnergiesThe correlation between core-electron binding energies and Mössbauer isomer shifts is investigated and discussed for low-spin pentacyanoferrates(II), high-spin iron(III) compounds and high-spin iron(II) halides. The Fe2p3/2 binding energies of the investigated pentacyano ferrates(II) increase with decreasing isomer shifts as a consequence of the increasing π acid strengths of the sixth ligands. In contrast, the electron binding energies in high spin iron(III) compounds and iron(II) halides increase with increasing isomer shifts. This correlation is caused by the σ donor properties and the electronegativity of the ligands.
    Notes: Der Zusammenhang zwischen core-Elektronen-Bindungsenergien und Mössbauer-Isomerieverschiebungen wird für low-spin-Pentacyanoferrate(II), high-spin-Eisen(III)-Verbindungen und high-spin-Eisen(II)-halogenide untersucht und diskutiert. Die Fe2p3/2-Bindungsenergien der untersuchten Pentacyanoferrate(II) nehmen mit Kleiner werdenden Isomerieverschiebungen als Folge zunehmender π-Säurestärken der sechsten Liganden zu. Im Gegensatz dazu wachsen die Bindungsenergien der high-spin-Eisen(III)-Verbindungen und Eisen(II)-Halogenide mit zunehmender Isomerieverschiebung. Ursache sind die σ-Donoreigenschaften und die Elektronegativität der Liganden.
    Additional Material: 5 Ill.
    Type of Medium: Electronic Resource
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 3
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Hydroboration of Carbon Disulfide with Sodium Tetrahydridoborate. Pentasodium Tetrakis (dithiomethylene) borate, a Salt with a New “Tetrathioborate” AnionCarbon disulfide reacts in THF, acetonitrile, or N, N-dimethylthioformamide with NaBH4 to give pentasodium tetrakis(dithiomethylene) borate, 6. The reaction mechanism for the new anion [B⊖(S—CH2—S⊖)4] can be described by stepwise CS2 insertion to the B—H bonds of BH4⊖ and H⊖ transfer from BH4⊖ to the intermediates. The results of these reactions have been obtained by 1H and 11B NMR spectroscopy.
    Notes: Kohlenstoffdisulfid reagiert in THF, Acetonitril oder N,N-Dimethylthioformamid mit NaBH1 zu Pentanatrium-tetrakis(dithiomethylen)borat, 6. Die Bildung des neuen Anions [B⊖ (S—CH2—S⊖)4] erfolgt durch schrittweise CS2-Insertion in die B—H-Bindungen des BH4⊖-Ions sowie durch H⊖-Übertragung von BH4⊖ auf die Zwischenprodukte. Die 1H- und 11B-NMR-Spektren werden diskutiert.
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
Close ⊗
This website uses cookies and the analysis tool Matomo. More information can be found here...