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- W1976202271 abstract "The reactions of 4N-ethyl-2-[1-(pyrrol-2-yl)methylidene(hydrazine carbothioamide (4 EL1) and 4N-ethyl-2[1-(pyrrol-2-yl)ethylidene(hydrazine carbothioamide (4 EL2) with Group 12 metal halides afforded complexes of types [M(L)2X2] (M = Zn, Cd; L = 4 EL1, 4 EL2; X = Cl, Br, I; 1–6, 14–19) and [M(L)X2] (M = Hg; L = 4 EL1, 4 EL2; X = Cl, Br, I; 7–9, 20–22). In addition, reaction of 4 EL1 with salts of CuII, NiII, PdII and PtII afforded compounds of type [M(4 EL1–H)2] (10–13). The new compounds were characterized by elemental analysis, FAB mass spectrometry, IR and electronic spectroscopy and, for sufficiently soluble compounds, 1H, 13C and, when appropriate, 113Cd or 199Hg NMR spectrometry. The spectral data suggest that in their complexes with Group 12 metal cations, both thiosemicarbazones are neutral and S-monodentate; and for [Zn(4 EL1)2I2] (3), [Cd(4 EL1)2Br2] (5) and [Hg(4 EL1)Cl2]2 (7) this was confirmed by X-ray diffractometry. By contrast, in its complexes with CuII and Group 10 metal cations, 4 EL1 is monodeprotonated and S,N-bidentate, as was confirmed by X-ray diffractometry for [Ni(4 EL1–H)2] (11) and [Pd(4 EL1–H)2] (12).Synthese und Strukturelle Charakterisierung von Metall-Komplexen von 2-Formylpyrrol-4N-ethylthiosemicarbazon (4 EL1) und 2-Acetylpyrrol-4N-ethylthiosemicarbazon (4 EL2)Die Reaktionen von 4N-ethyl-2-[1-(pyrrol-2-yl)methyliden(hydrazin-carbothioamid (4 EL1) und 4Nethyl-2-[1-(pyrrol-2-yl)ethyliden(hydrazin-carbothioamid (4 EL2) mit Halogeniden der Metalle der 12. Gruppe ergeben Komplexe des Typs [M(L)2X2] (M = Zn, Cd; L = 4 EL1, 4 EL2; X = Cl, Br, I; 1–6, 14–19) und [M(L)X2] (M = Hg; L = 4 EL1, 4 EL2; X = Cl, Br, I; 7–9, 20–22). Auserdem fuhrt die Reaktion von 4 EL1 mit Salzen von CuII, NiII, PdII und PtII zu Verbindungen des Typs [M(4 EL1–H)2] (10–13). Die neuen Verbindungen wurden durch Elementaranalysen, FAB-Massenspektren sowie IR- und Elektronenspektren charakterisiert. Von den ausreichend loslichen Verbindungen wurden auserdem 1H-, 13C- und bei den Cd- und Hg-Verbindungen auch die 113Cd- oder 199Hg-NMR-Spektren registriert. Die spektroskopischen Daten deuten darauf hin, das die Thiosemicarbazon-Einheiten, 4 EL1, in den Komplexen der Kationen der 12. Gruppe als ungeladene Liganden vorliegen, die uber das S-Atom einzahnig gebunden sind. Fur die Komplexe [Zn(4 EL1)2I2] (3), [Cd(4 EL1)2Br2] (5) und [Hg(4 EL1)Cl2]2 (7) wird dieser Befund durch Kristallstrukturanalysen bewiesen. Im Gegensatz dazu sind die Liganden 4 EL1 in den Komplexen von CuII und den Metallkationen der 10. Gruppe einfach deprotoniert und zweizahnig uber S,N gebunden, wie auch durch Kristallstrukturanalysen von [Ni(4 EL1–H)2] (11) and [Pd(4 EL1–H)2] (12) belegt wird." @default.
- W1976202271 created "2016-06-24" @default.
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- W1976202271 date "2001-10-01" @default.
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- W1976202271 title "Synthesis and Structural Characterization of Metal Complexes of 2-Formylpyrrole-4N-ethylthiosemicarbazone (4 EL1) and 2-Acetylpyrrole-4N-ethylthiosemicarbazone (4 EL2)" @default.
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