共查询到20条相似文献,搜索用时 32 毫秒
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《Journal of organometallic chemistry》1987,333(3):347-365
The ambident cyanopyridine ligands form N(pyridine) and N′(nitrile) coordinated mono- and binuclear complexes with the (C5H4CH3)(CO)2Mn fragment. All three possible forms for 4-cyanopyridine could be isolated, whereas mononuclear compounds were obtained as most stable species in N1-coordinated form with 3-cyanopyridine and in CN2-coordinated form with the 2-isomer. IR, NMR, and UV/VIS spectroscopy as well as electrochemistry and ESR spectroscopy of the anion radicals demonstrate superior π back-bonding via the pyridine nitrogen centers, the isolation of nitrile coordinated complexes is attributed to the kinetic stability of the CNMn bond. While terephthalonitrile was found to form exclusively mononuclear neutral complexes, its anion radical prefers to coordinate to a second metal fragment, illustrating the excellent coordination properties of reduced nitriles. A neutral binuclear complex could be isolated with the stronger π-acceptor, tetrafluoroterephthalonitrile. 相似文献
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F. Neumann 《Fresenius' Journal of Analytical Chemistry》1954,142(2):155-156
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Analytical and Bioanalytical Chemistry - 相似文献
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Analytical and Bioanalytical Chemistry - 相似文献
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《Journal of fluorine chemistry》1988,41(3):415-419
Under polar conditions Cd(CF3)2 complexes react with (CO)3CpMCl ( M = Mo, W) to form the corresponding M-CF3 compounds. (CO)3CpMoCF3 is identified by comparing its spectroscopical data with the described ones. The 1H-, 13C, 13C, 19F-, and 183W-NMR spectra, the i.r. and mass spectra of the new compound (CO)3CpWCF3 are discussed. Both M-CF3 compounds do not react as polar trifluoromethylation reagents. 相似文献
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Rudolf Wegscheider 《Monatshefte für Chemie / Chemical Monthly》1929,51(1):285-324
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Zusammenfassung Es wird die Darstellung einer größeren Anzahl von neuen Methyl-, Dimethyl-, Trimethyl- und Tetramethylthionaphthenen sowie von 2-Äthylthionaphthen beschrieben. Die Thionaphthene lassen sich mit Peressigsäure fast quantitativ zu den Sulfonen oxydieren, die sich papierchromatographisch gut trennen lassen.Mit 1 Abbildung 相似文献
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Dr. Guido Goldschmiedt 《Monatshefte für Chemie / Chemical Monthly》1881,2(1):580-586
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