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
  • 1
    ISSN: 0009-2940
    Keywords: Gold(I) complexes ; Gold(I) thiolates ; Thiolato complexes ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Chloro(triphenylphosphane)gold(I) reacts readily with benzenethiol C6H5SH and a series of sterically hindered (2,4,6-trialkylbenzene)thiols 2,4,6-R3C6H2SH in the presence of NEt3 to yield stable gold(I) complexes Ph3PAu(S - 2,4,6-C6H2R3) [R=H (1), Me (2), Et (3), iPr (4)]. The crystal structures of these complexes have been determined by single-crystal X-ray diffraction analysis. In all compounds the gold atoms are linearly two-coordinate with very similar bond lengths and angles. - While complexes 2 - 4 with bulky thiolate ligands are monomeric in the crystal lattice, complex 1 has been found to form pairs of molecules with intermolecular gold - gold contacts of 313.5(5) pm. The Mössbauer spectra of the complexes exhibit large isomer shifts (I.S.), ranging from 3.06 to 3.72 mm s-1, and quadrupole splittings (Q.S.), ranging from 7.90 to 8.68 mm s-1. These data can be attributed to the strong electron-donating properties of the benzenethiolate ligands. The gold - gold contacts in complex 1 lead to I.S. and Q.S. values which are slightly smaller than those of 2 - 4. The Au - S distances do not show a major influence of the S - Au - P pairing in complex 1 as compared to complexes 2 - 4.
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 2
    ISSN: 0044-2313
    Keywords: Gold(I) benzenedithioles ; Gold(III) benzenedithioles ; (Phosphine)gold(I) complexes ; Benzenedithiolato complexes ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: (Phosphan)gold(I)-Komplexe von Benzoldithiolen Kristallstruktur des 1,2-Benzoldithiolato-bis[triphenylphosphan-gold(I)] und Bis(triethylphosphan)gold(I)-bis(1,2-benzoldithiolato)gold(III)Die Reaktionen von 1,2- und 1,3-Benzoldithiol mit Chloro(phosphan)gold(I)-Komplexen R3PAuCl (R = Et, Ph) in Gegenwart von Triethylamin in Tetrahydrofuran ergeben in hohen Ausbeuten die stabilen Gold(I)-Komplexe 1,2-C6H4(SAuPR3)2 [R = Et (1) und Ph (2)] bzw. 1,3-C6H4(SAuPPh3)2 (3). Die Verbindungen wurden durch analytische und NMR-spektroskopische Daten charakterisiert. Aus der Reaktion von 1,2-C6H4(SH)2 mit Et3PAuCl wurde in geringer Ausbeute auch die Verbindung [(Et3P)2Au]+ [Au(1,2-C6H4S2)2]- (4) isoliert. Die Kristallstrukturen der Verbindungen 2 und 4 wurden durch Einkristall-Röntgenstrukturanalysen bestimmt. Die Goldatome in Komplex 2 sind zweifach koordiniert mit Bindungswinkeln S—Au—P von 175,2(1) und 159,5(1)°, Au - S-Bindungslängen von 2,304(1) und 2,321(1) Å und kurzen Au-Kontakten von 3,145(1) Å. Die Goldatome im Kation des Komplexes 4 sind ebenfalls linear zweifach koordiniert mit einem P - Au - P-Winkel von 170,1(1)° und Au - P-Abständen von 2,296(3) und 2,298(3) Å. Die Geometrie des Anions weist eine quadratisch-planare Umgebung des Gold(III)-Zentrums auf mit zwei chelatisierenden 1,2-Benzoldithiolat-Liganden, deren Au—S-Abstände zwischen 2,299(3) und 2,312(3) Å liegen (zwei kristallographisch unabhängige, centrosymmetrische Anionen in der Elementarzelle).
    Notes: The reaction of 1,2- and 1,3-benzenedithiol C6H4(SH)2 with chloro(phosphine)gold(I) complexes R3PAuCl (R = Et, Ph) in the presence of triethylamine in tetrahydrofuran gives stable gold(I) complexes 1,2-C6H4(SAuPR3)2 [R = Et (1) and Ph (2)] or 1,3-C6H4(SAuPPh3)2 (3), respectively, in high yield. The compounds have been characterized by analytical and NMR spectroscopic data. From the reaction of 1,2-C6H(SH)2 with Et3P—AuCl a by-product [(Et3P)2Au]+ [Au(1,2—C6H4S2)2]- (4) has also been isolated in low yield. The crystal structures of compounds 2 and 4 have been determined by single crystal X-ray diffraction. The gold(I) atoms in complex 2 are two-coordinate with bond angles S—Au—P of 175.2(1) and 159.5(1)°, Au—S bond distances of 2.304(1) and 2.321(1) å, and a short Au…Au contact of 3.145(1) Å. The gold(I) atom in the cation of complex 4 is also linearly two-coordinate with a P—Au—P angle of 170.1(1) Å and Au—P distances of 2.296(3) and 2.298(3) Å. The geometry of the anion in 4 shows a square-planar coordination of gold(III) by two chelating 1,2-benzenedithiolate ligands with Au—S distances between 2.299(3) and 2.312(3) Å (for two crystallographically independent, centrosymmetrical anions in the unit cell).
    Additional Material: 2 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...