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• W2045767319 abstract "Die Umsetzung von p-Phenylendilithium mit Hexacarbonylchrom und -wolfram und anschließende Alkylierung mit Triethyloxonium-tetrafluoroborat ergibt μ-[p-Phenylenbis[(ethoxy)carben]]-bis(pentacarbonylmetall)-Komplexe (CO)5MC(OEt)–p-C6H4–(OEt)CM(CO)5 (M = Cr (3a), W (3b)), sowie die einkernigen Carbenkomplexe 4a und 4b. Die analoge Reaktion von o-Phenylendilithium mit Metallhexacarbonylen der VI. Nebengruppe ergibt die erwarteten einkernigen, 1,4-chelatisierten Biscarbenkomplexe (M = Cr (5a), Mo (5b), W (5c)), während 1,2-Dilithio-1,2-diphenylethan ein Gemisch von einkernigen (M = Cr (6a), W (6b)) und zweikernigen (CO)5MC(OEt)CH(Ph)CH(Ph)(OEt)CM(CO)5 (M = Cr (7a), W (7b)) Biscarben-Komplexen liefert. Die Aminolyse von 5a–c mit Dimethylamin führt zu cis-Tetracarbonyl[o-phenylenbis[(dimethylamino)carben]]-Verbindungen von Chrom, Molybdän und Wolfram (8a–c–). 3a, b und 4a, b reagieren mit Bortrihalogeniden BX3 unter Bildung der entsprechenden trans-Halogenocarbin-Komplexe 9a, b und 10a–c. Eigenschaften, Spektren und die Ergebnisse einer Röntgenstrukturuntersuchung an 9b werden beschrieben. Transition Metal Carbene Complexes, CXXIV. Mono- and Binuclear Biscarbene Complexes of Chromium, Molybdenum, and Tungsten and their Reaction with Boron Trihalides The reaction of p-phenylenedilithium with hexacarbonylchromium and -tungsten and subsequent alkylation by triethyloxonium tetrafluoroborate yields μ-[p-phenylenebis[(ethoxy)carbene]]-bis-(pentacarbonylmetal) complexes (CO)5MC(OEt)–p-C6H4–(OEt)CM(CO)5 (M = Cr (3a), W (3b)) as well as the mononuclear carbene complexes 4a and 4b. The analogous reaction of o-phenylenedilithium with metalhexacarbonyls of the VI. subgroup affords the expected mononuclear 1,4-chelated biscarbene complexes (M = Cr (5a), Mo (5b), W (5c)), while 1,2-dilithio-1,2-diphenylethane gives a mixture of mononuclear (M = Cr (6a), W (6b)) and binuclear (CO)5MC(OEt)CH(Ph)CH(Ph)-(OEt)CM(CO)5 (M = Cr (7a), W (7b)) biscarbene complexes. The aminolysis of 5a – c with dimethylamine leads to cis-tetracarbonyl[o-phenylenebis[(dimethylamino)carbene]] compounds of chromium, molybdenum, and tungsten (8a – c). 3a, b and 4a, b react with boron trihalides BX3 to form the corresponding trans-halogenocarbyne complexes 9a, b and 10a – c. Properties, spectra, and the results of an X-ray structure analysis of 9b are reported." @default.
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• W2045767319 date "1982-09-01" @default.
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• W2045767319 title "Übergangsmetall‐Carben‐Komplexe, CXXIV. Ein‐ und zweikernige Biscarbenkomplexe von Chrom, Molybdän und Wolfram und ihre Umsetzung mit Bortrihalogeniden" @default.
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• W2045767319 doi "https://doi.org/10.1002/cber.19821150903" @default.
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