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
  • Synthesis  (3)
  • IR Spectra  (1)
  • Amido complexes
  • Nitrido ligand
  • syntheses
  • 1995-1999  (4)
  • 1995  (4)
  • 1
    ISSN: 0044-2313
    Keywords: Phosphorane Iminato Complexes of Sulfur ; Syntheses ; IR Spectra ; Crystal Structures ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Phosphorane Iminato Complexes of Sulfur. Syntheses and Crystal Structures of [O3SS(NPPh3)2] · CH3CN, [SO(NPPh3)2], and [SCl(NPMe3)2]ClThe title compounds have been prepared by the reaction of Me3SiNPPh3 with SO2 and SOCl2, respectively, and by the reaction of Me3SiNPMe3 with S2Cl2. They form colourless, moisture sensitive crystals, which were characterized by IR spectroscopy and by crystal structure determinations.[O3SS((NPPh3)2)] · CH3CN: Space group Pca21, Z = 4, structure solution with 4016 observed unique reflections, R = 0.050. Lattice dimensions at -60°C: a = 1865.1, b = 1168.4, c = 1569.0 pm. The compound has a zwitterionic structure with a S—S bond length of 218.2 pm and bond lengths S—N of 161.2 and P—N of 160.1 pm.[SO(NPPh3)2]: Space group P21/c, Z = 4, structure solution with 2854 observed unique reflections, R = 0.113. Lattice dimensions at -50°C: a = 1173.1, b = 1585.6, c = 1619.2 pm, b̃ = 98.13°. The compound forms monomeric molecules, in which the positions of S and N atoms are disordered in two positions. The bond lengths are S—N 166 pm and P—N 163 pm in average.[SCl(NPMe3)2]Cl: Space group P1, Z = 2, structure solution with 2416 observed unique reflections, R = 0.038. Lattice dimensions at 20°C: a = 613.2, b = 1030.3, c = 1111.4 pm, α = 88.48°, b̃ = 88.01°, γ = 83.10°. The compound forms ions [SCl(NPMe3)2]+ and Cl-. In the cation the sulfur atom is φ-tetrahedrally coordinated with a long S—Cl distance of 246.9 pm and bond lengths S—N of 155.3 pm and P—N of 164.3 pm in average.
    Notes: Die Titelverbindungen entstehen durch Umsetzung von Me3SiNPPh3 mit Schwefeldioxid bzw. mit Thionylchlorid und von Me3SiNPMe3 mit Dischwefeldichlorid als farblose, feuchtigkeitsempfindliche Kristalle, die wir durch die IR-Spektren und durch Kristallstrukturanalysen charakterisiert haben.[O3SS(NPPh3)2)] · CH3CN: Raumgruppe Pca21, Z = 4, Strukturlösung mit 4016 unabhängigen beobachteten Reflexen, R = 0,050. Gitterabmessungen bei -60°C: a = 1865,1; b = 1168,4; c = 1569,0 pm. Die Verbindung hat eine zwitterionische Struktur mit einer S—S-Bindungslänge von 218,2 pm und Abständen S—N von 161,2 pm und P—N von 160,1 pm.[SO(NPPh3)2]: Raumgruppe P21/c, Z = 4, Strukturbestimmung mit 2854 unabhängigen beobachteten Reflexen, R = 0,113. Gitterabmessungen bei -50°C: a = 1173,1; b = 1585,6; c = 1619,2 pm, b̃ = 98,13°. Die Verbindung hat eine monomere Molekülstruktur, deren S- und N-Atomlagen in zwei Positionen fehlgeordnet sind. Die Bindungslängen betragen im Mittel für S—N 166 pm und für P—N 163 pm.[SCl(NPMe3)2]Cl: Raumgruppe P1, Z = 2, Strukturlösung mit 2416 unabhängigen beobachteten Reflexen, R = 0,038. Gitterabmessungen bei 20°C: a = 613,2; b = 1030,3; c = 1111,4 pm, α = 88,48°; b̃ = 88,01°; γ = 83,10°. Die Verbindung besteht aus Ionen [SCl(NPMe3]2+ und Cl-. Im Kation ist das Schwefelatom φ-tetraedrisch koordiniert mit einem S—Cl-Abstand von 246,9 pm und mittleren Bindungslängen S—N von 155,3 pm und P—N von 164,3 pm.
    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: Alkoxy-Alkyne Complexes of Tungsten ; Synthesis ; Crystal Structures ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Synthesis and Crystal Structures of the Tungsten(VI)-alkyne Complexes [W2(O)(OMe)6(Et—Se—C≡C—Se—Et)2] and Li[W(OMe)5(Et—Te—C≡C—Te—Et)]The title compounds have been prepared by reactions of lithium methanolate with [WCl4(Et—Se—C≡C—Se—Et)(THF)] and [WCl4(Et—Te—C≡C—Te—Et)(THF)], respectively, in diethylether suspensions. Both complexes were characterized by crystal structure determinations.[W2(O)(OMe)6(Et—Se—C≡C—Se—Et)2]: Space group P1, Z = 2, structure determination with 4 320 observed unique reflections, R = 0.041. Lattice dimensions at -70°C: a = 949.3, b = 1 225.3, c = 1 285.0 pm, α = 82.48°; γ = 82.44°; β = 81.44°. The tungsten atoms are bridged by three μ2-O-atoms of the OMe groups; the alkyne ligands are coordinated side-on in a metallacyclopropene-like fashion.Li[W(OMe)5(Et—Te—C≡C—Te—Et)]: Space group P1, Z = 2, structure determination with 9 381 observed unique reflections, R = 0.038. Lattice dimensions at -70°C: a = 983.4, b = 1606.9, c = 1971.5 pm, α = 66.09°, β = 84.29°, γ = 79.83°. The lithium ions link the [W(OMe)5(Et—Te—C≡C—Te—Et)]- anions to a trimeric ion ensemble via the O atoms of three OMe groups of each anion.
    Notes: Die Titelverbindungen werden durch Reaktion von Lithiummethanolat mit [WCl4(Et—Se—C≡C—Se—Et)(THF)] bzw. mit [WCl4(Et—Te—C≡C—Te—Et)(THF)] in Diethylether hergestellt und durch Kristallstrukturanalysen charakterisiert.[W2(O)(OMe)6(Et—Se—C≡C—Se—Et)2]: Raumgruppe P1, Z = 2, Strukturlösung mit 4 320 beobachteten unabhängigen Reflexen, R = 0,041. Gitterabmessungen bei -70°C: a = 949,3; b = 1225,3; c = 1285,0 pm, α = 82,48°; β = 82,44°; γ = 81,44°. Die beiden Wolframatome sind über drei μ2-OMe-Brücken verknüpft; die Alkinliganden sind seitlich entsprechend von Metallacyclopropengruppen koordiniert.Li[W(OMe)5(Et—Te—C≡C—Te—Et)]: Raumgruppe P1, Z = 2, Strukturlösung mit 9 381 beobachteten unabhängigen Reflexen, R = 0,038. Gitterabmessungen bei -70°C: a = 983,4; b = 1606,9; c = 1971,5 pm, α = 66,09°; β = 84,29°; β = 79,83°. Die Lithiumionen verknüpfen die [W(OMe)5(Et—Te—C≡C—Te—Et)]--Anionen über die O-Atome dreier OMe-Gruppen zu einem trimeren Ionenensemble.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 3
    ISSN: 0044-2313
    Keywords: Functionalized Alkyne Complexes of Tungsten ; Synthesis ; IR spectra ; Crystal Structures ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Functionalized Alkyne Complexes of Tungsten(VI). Syntheses and Crystal Structures of [WCl4(Et—Se—C≡C—Se—Et)(THF)] and [WCl4(Et—Te—C≡C—Te—Et)(THF)]The title compounds have been prepared by reactions of [WCl4(SEt2)2] with the alkynes Et—X—C≡C—X—Et (X = Se, Te) in CCl4 solution and subsequent addition of tetrahydrofurane. Both complexes were characterized by crystal structure determinations.[WCl4(Et—Se—C≡C—Se—Et)(THF)]: Space group P21/n, Z = 4, structure determination with 2942 unique reflections, R = 0.038. Lattice dimensions at 20°C: a = 934.2, b = 1639.5, c = 1189.5 pm, β = 96.497°.[WCl4(Et—Te—C≡C—Te—Et)(THF)]: Space group P21/n, Z = 4, structure determination with 4097 unique reflections, R = 0.067, Lattice dimensions at -70°C: a = 899.2, b = 1691.9, c = 1213.3 pm, β = 96.82°.The complexes have monomeric molecular structures with the oxygen atom of the THF molecules in trans-position to the side-on bound alkyne ligands.
    Notes: Die Titelverbindungen werden aus [WCl4(SEt2)2] und den Alkinen Et—X—C≡C—X—Et (X = Se, Te) in CCl4-Lösung nach Zusatz von Tetrahydrofuran erhalten und durch Kristallstrukturanalysen charakterisiert.[WCl4(Et—Se—C≡C—Se—Et)(THF)]: Raumgruppe P21/n, Z = 4, Strukturverfeinerung mit 2942 unabhängigen Reflexen, R = 0,038. Gitterabmessungen bei 20°C: a = 934,2; b = 1639,5; c = 1189,5 pm, β = 96,497°.[WCl4(Et—Te—C≡C—Te—Et)(THF)]: Raumgruppe P21/n, Z = 4, Strukturverfeinerung mit 4097 unabhängigen Reflexen, R = 0,067. Gitterabmessungen bei -70°C: a = 899,2; b = 1691,9; c = 1213,3 pm, β = 96,82°.Beide Verbindungen haben monomere Molekülstrukturen, in denen sich das O-Atom des THF-Moleküls in trans-Position zum seitlich gebundenen Alkinliganden befindet.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 4
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 621 (1995), S. 1171-1174 
    ISSN: 0044-2313
    Keywords: Selenium ; Phosphorane Iminato Complex of Selenium ; Synthesis ; IR Spectrum ; Crystal Structure ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Synthesis and Crystal Structure of the Selenyl-Phosphoraneiminato Complex SeO(NPPh3)2SeO(NPPh3)2 has been prepared from SeO2 and Me3SiNPPh3 in a SeO2 suspension in acetonitrile, forming colourless crystals. The compound is characterized by IR spectroscopy and by a crystal structure determination. Space group P1, Z = 2, structure solution with 5 344 observed unique reflections, R = 0.064. Lattice dimensions at -40°C: a = 931.6, b = 947.6, c = 1 762 pm, α = 77.50°, β = 81.78°, γ = 79.23°. The compound forms monomeric molecules in which the selenium atom is ϕ-tetrahedrally surrounded with bond lengths SeO = 161.7 pm and SeN = 179.9 and 181.6 pm.
    Notes: SeO(NPPh3)2 entsteht in Form farbloser Kristalle bei der Reaktion einer Suspension von SeO2 mit Me3SiNPPh3 in Acetonitril. Die Verbindung wird durch das IR-Spektrum und durch eine Kristallstrukturanalyse charakterisiert. Raumgruppe P1, Z = 2, Strukturlösung mit 5 344 beobachteten unabhängigen Reflexen, R = 0,064. Gitterkonstanten bei -40°C: a = 931,6; b = 947,6; c = 1 762 pm, α = 77,50°, β = 81,78°, γ = 79,23°. Die Verbindung bildet monomere Moleküle, in denen das Selenatom verzerrt ϕ-tetraedrisch umgeben ist mit Abständen SeO = 161,7 pm und SeN = 179,9 und 181,6 pm.
    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...