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  • 1
    Electronic Resource
    Electronic Resource
    Sol-gel synthesis of Ru(II) complex of 3-4,5-dihydroimidazol-1-yl-propyltriethoxysilane aerogels and xerogels (2000)
    Springer
    Polymer bulletin 44 (2000), S. 47-53 
    Details
    ISSN: 1436-2449
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: ABSTRACT The preparation and the measurement of some properties of Ruthenium (II) coordinated 3-4,5-dihyroimidazol-1-yl-propyltriethoxysilane have been achieved. The organosilicon precursor chosen for this study was N-aminoethyl-3-aminopropyltriethoxysilane converted to 3-4,5-dihydroimidazol-1-yl-propyltriethoxysilane that was then coordinated with ruthenium (II). FT-IR spectroscopy, DTA and TGA analysis were used to characterize the bond formation during gelation, aging and drying of gels. The prepared aerogels are low-density 0.19–0.30 g/cm3 amorphous materials with surface areas of 405 to 530 m2/g. The resulting aerogel catalysts exhibited unique structural and chemical properties.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s002890050572
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  • 2
    Electronic Resource
    Electronic Resource
    Metallacycloalkane, V. Darstellung eines Rhodacycloheptans durch oxidative Kopplung von 3,3-Dimethylcyclopropen an Rhodium(I)-Komplexe (1982)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 115 (1982), S. 3414-3421 
    Details
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Metallacycloalkanes, V. Preparation of a Rhodacycloheptane by Oxidative Coupling of 3,3-Dimethylcyclopropene to Rhodium(I) ComplexesThe rhodacycloheptane derivative 2 is easily prepared in good yields from tris(triphenylphosphane)rhodium chloride or carbonylbis(triphenylphosphane)rhodium chloride and 3,3-dimethylcyclopropene. Spectroscopic data and an X-ray analysis show that 2 is monomeric and has a syn,anti,syn structure. The hydrocarbon group of 2 is eliminated by reaction of 2 with CO to give hexamethyl-tris-σ-homobenzene (5) and hexamethyl-tris-σ-homotropone (4) in a ratio of 1:4. The X-ray structure of 4 is also given.
    Notes: Aus Tris(triphenylphosphan)rhodium-chlorid oder Carbonylbis(triphenylphosphan)rhodiumchlorid und 3,3-Dimethylcyclopropen (1) ist das Rhodacycloheptan-Derivat 2 leicht und in guten Ausbeuten zugänglich. Spektroskopische Daten wie auch eine Röntgenstrukturanalyse zeigen, daß 2 monomer ist und eine syn,anti,syn-Struktur besitzt. Mit CO wird der Kohlenwasserstoffrest von 2 unter Bildung des Hexamethyl-tris-σ-homobenzols (5) und des Hexamethyl-tris-σ-homotropons (4) im Verhältnis 1:4 abgespalten. Von 4 wird die Röntgenstrukturanalyse angegeben.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cber.19821151017
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  • 3
    Electronic Resource
    Electronic Resource
    Benzimidazole, Benzothiazole and Benzoxazole Ruthenium(II) Complexes; Catalytic Synthesis of 2,3-Dimethylfuran (2000)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 2000 (2000), S. 29-32 
    Details
    ISSN: 1434-1948
    Keywords: Arene complexes ; Ruthenium ; Benzimidazole ; Benzothiazole ; Benzoxazole ; Cycloisomerisation ; Chemistry ; General Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Fourteen ruthenium(II) complexes of the type [RuCl2(η6-arene)L], (arene = 1,4-MeC6H4Pri or C6Me6; L = benzimidazole derivative in which the NH group is substituted by N-alkyl or isoelectronic O or S atoms) have been prepared by cleavage of [RuCl2(η6-arene)]2 with the N-heterocycle L. Their spectroscopic and electrochemical properties are described. The effect of the nature of the benzazole (L) on the catalytic activity of these complexes for the intramolecular cyclization of (Z)-3-methylpent-2-en-4-yn-1-ol into 2,3-dimethylfuran has also been studied; the benzimidazole complexes were found to be the most active.
    Additional Material: 5 Tab.
    Type of Medium: Electronic Resource
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    Paper (German National Licenses)
  • 4
    Electronic Resource
    Electronic Resource
    Unusual products in the reactions of hexachlorocyclotriphosphazatriene with sodium aryloxides (1996)
    New York, NY [u.a.] : Wiley-Blackwell
    Heteroatom Chemistry 7 (1996), S. 249-256 
    Details
    ISSN: 1042-7163
    Keywords: Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Reactions of hexachlorocyclotriphosphazatriene, N3P3Cl6 1, with sodium aryloxides have been studied. Compound 1 was found to react by the nucleophilic substitution pathway to yield monocyclophosphazenes [N3P3Cl6(OC6H2Bu13-2,4,6) 5 and N3P3Cl4(OC6H2Me-4-Bu12-2,6)2 6] and bi(cyclophosphazenes) ([Cl5N3P3-P3N3Cl4(OC6H3Bu12-2,6)] 7 and [N3P3(OC6H3Bu12-2,6)5]2 8). The unusual bi(cyclophosphazenes) 7 and 8 are the first examples of two cyclotriphosphazene rings linked by a P(SINGLE BOND)P bond [2.193 (2) Å], which have been obtained by reacting 1 with ArONa. The structures of compounds 5-8 are ascertained by elemental analyses, 1H-, 31P-13C-NMR, IR, and MS spectra. The molecular structure of monocyclic-phosphazene 5 was determined by X-ray diffraction techniques for further structural assignment. It crystallizes in the monoclinic space group P21/m with a = 6.144(2), b = 17.079(9), c = 13.181(9) Å, β = 92.79(7), and Z = 2, R = 0.074. Compound 5 is on a crystallographic mirror plane, and there is only a half molecule in the asymmetric unit. © 1996 John Wiley & Sons, Inc.
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
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    Paper (German National Licenses)
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