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- W2023803483 abstract "Die nucleophile Substitution von Chlorid in Dichlorcyclobutendion durch Carbonylmetallate liefert die μ-(3,4-Dioxo-1-cyclobuten-1,2-diyl)-Komplexe LnM(C4O2)MLn 1 [MLn=Re(CO)5, Mn(CO)5, W(CO)3(η5-C5H5)] bzw. die μ-(2-Chlor-3,4-dioxo-1-cyclobuten-1-yl)-Komplexe LnM [MLn = Mn(Co)5, W(CO)3(η5-C5H5), Mo(CO)3(η5-C5H5)]. Nach der Röntgenstrukturanalyse des Dirhenium-Komplexes (OC)5Re-(C4O2)Re(CO)5 (1a) sind die Re–C-Bindungen gegenüber Einfachbindungen leicht verkürzt, Re–C=2.18(1)/2.17(1)Å [monoklin, P21, a=7.031(1), b=11.532(1), c=11.418(1)Å, β=105.54(1)°, V=891.95Å3, dber=2.727 g/cm3, Z=2, Rw=0.031 für 252 verfeinerte Parameter und 3539 Observablen mit I ≥ 2.0σ(I)]. The nucleophilic substitution of chloride in dichlorocyclobutenedione by carbonylmetallates gives the μ-(3,4-dioxo-1-cyclobutene-1,2-diyl) complexes LnM(C4O2)MLn 1 [MLn=Re(CO)5, Mn(CO)5, W(CO)3(η5-C5H5)] and the μ-(2-chloro-3,4-dioxo-1-cyclobuten-1-yl) complexes LnM [MLn = Mn(Co)5, W(CO)3(η5-C5H5), Mo(CO)3(η5-C5H5)], respectively. The structure of the dirhenium complex (OC)5Re(C4O2)Re(CO)5 (1a) was determined by X-ray diffraction. The Re–C bonds are slightly shortened with respect to single bonds, Re–C=2.18(1)/2.17(1)Å [monoclinic, P21, a=7.031(1), b=11.532(1), c=11.418(1)Å, β=105.54(1)°, V=891.95Å3, dcalc=2.727 g/cm3 for Z=2, Rw=0.031 for 252 refined parameters and 3539 observables with I ≥ 2.0σ(I)]." @default.
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- W2023803483 date "1987-06-01" @default.
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- W2023803483 title "Mono‐ und dimetallierte Cyclobutendione mit Molybdän‐, Wolfram‐, Mangan‐ und Rheniumcarbonylen" @default.
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