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  • 1
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 620 (1994), S. 625-631 
    ISSN: 0044-2313
    Keywords: Bis(dichloromethyl)mercury ; Dichloromethylmercuryalkyles ; synthesis ; NMR, vibrational spectra ; X-ray structure ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Spectroscopic and X-Ray Structural Investigations on Dichloromethyl Mercury CompoundsBis(dichloromethyl)mercury, Hg(CHCl2)2, and mixed alkyl compounds RHgCHCl2 (with R = CH3, C2H5) have been synthesized by known methods from CH2Cl2, lithium butanide and HgCl2, CH3HgCl or C2H5HgCl, respectively. The 1H-, 13C-NMR as well as the IR and Raman spectra of the liquid alkyls RHgCHCl2 and the high melting Hg(CHCl2)2 have been measured and assigned. According to the X-ray structure determination Hg(CHCl2)2 crystallizes in the monoclinic space group P21/c with 4 non-symmetric molecules per unit cell (R = 0.046).
    Notes: Bis(dichlormethyl)quecksilber, Hg(CHCl2)2, und die gemischten Alkylverbindungen RHgCHCl2 (mit R = CH3, C2H5) werden nach bekannten Vorschriften aus CH2Cl2, Lithiumbutanid und HgCl2 bzw. CH3HgCl oder C2H5HgCl synthetisiert. Die 1H- und 13C-NMR- sowie die IR- und Ramanspektren der flüssigen Alkyle RHgCHCl2 und des hochschmelzenden Hg(CHCl2)2 werden registriert und ausgewertet. Nach der Röntgenstrukturanalyse kristallisiert Hg(CHCl2)2 in der monoklinen Raumgruppe P21/c mit 4 azentrischen Molekülen in der Elementarzelle (R = 0,046).
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 622 (1996), S. 573-578 
    ISSN: 0044-2313
    Keywords: Alkylimido-methylgallanes ; synthesis ; NMR vibrational spectra X-Ray structure ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Two New Alkylimido-Methylgallanes with Cage StructureThe tetrameric alkylimido-methylgallanes (MeGa—NR)4 (R = CH(CH3)2 ( iPr), C(CH3)3 ( tBu) and Me = CH3) have been prepared by pyrolyses of the dimeric amido compounds (Me2Ga—N(H)R)2 at 250-260°C. The mass, NMR and vibrational spectra are discussed, they prove almost identical structures of the skeletons. The X-Ray structure determination of (MeGa—NtBu)4 shows four heterocubane molecules in the trigonal unit cell (space group P3c1, a = b = 1061.7(1), c = 3191.8(5) pm) and two disordered benzene solvate molecules. The Ga—N bonds range between 198.4 to 199.9 pm, the Ga—N—Ga and N—Ga—N bond angles lie between 90.6 to 91.4 and 88.6 to 89.2°, respectively. The structure was refined to an R1(R2)-value of 0.049 (0.057).
    Notes: Die tetrameren Alkylimido-methylgallane (MeGa—NR)4 (R = CH(CH3)2 ( iPr), C(CH3)3 ( tBu) und Me = CH3) sind durch Pyrolyse der dimeren Amidoverbindungen (Me2Ga—N(H)R)2 bei 250-260°C dargestellt worden. Die Massen-, Kernresonanz- und Schwingungsspektren werden diskutiert; sie bestätigen weitgehend übereinstimmende Gerüststrukturen. Die Röntgenstrukturanalyse von (MeGa—NtBu)4 zeigt vier Heterocubanmoleküle in der trigonalen Einheitszelle (Raumgruppe P3c1, a = b = 1061,7(1), c = 3191,8(5) pm) sowie zwei fehlgeordnete Benzol-Solvatmoleküle. Die Ga—N-Bindungslängen liegen zwischen 198,4 und 199,9 pm, die Ga—N—Ga bzw. N—Ga—N-Valenzwinkel zwischen 90,6 und 91,4° bzw. 88,6 und 89,2°. Die Struktur wurde bis zu einem R1(R2)-Wert von 0,049 (0,057) verfeinert.
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
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