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• W2017341998 abstract "(NBu4)2{Se[S2CC(CN)2]2} (I), (AsPh4)2 · {Te[SSeCC(CN)2]2} (II) und (NBu4)2{Te[Se2CC(CN)2]2} (III) mit den zweizähnigen Liganden 2,2-Dicyanethylen-1,1-dithiolat i-mnt, 2,2-Dicyanethylen-1,1-thioselenolat i-mnts und 2,2-Dicyanethylen-1,1-diselenolat i-mns wurden dargestellt und durch Einkristallstrukturanalysen charakterisiert. In den zentralen M(XX)2E2-Einheiten (M = Se, Te; XX = Ligand, E = freies Elektronenpaar) liegt vierfach koordiniertes SeII bzw. TeII vor. Die Komplexanionen [Se(i-mnt)2E2]2− und [Te(i-mnts)2E2]2− sind trapezförmig verzerrt mit d(SeS) = 2,276(5); 2,287(5); 2,803(5); 2,789(5) Å und d(TeSe) = 2,611(2); 2,617(3); d(TeS) = 2,889(5); 2,935(4) Å. In III liegen dagegen zentrosymmetrische Komplexanionen [Te(i-mns)2E2]2− mit nahezu gleichlangen TeSe-Bindungen vor: 2,674(3) und 2,692(2) Å. Die TeSe-Bindungen sind dabei gegenüber gewöhnlichen TeSe-Bindungslängen deutlich aufgeweitet. Structures of New SeII and TeII Complexes Containing 2,2-Dicyanethylene-1,1-dithiolate, 2,2-Dicyanethylene-1,1-thioselenolate, and 2,2-Dicyanethylene-1,1-diselenolate (NBu4)2{Se[S2CC(CN)2]2} (I), (AsPh4)2 · {Te[SSeCC(CN)2]2} (II), and (NBu4)2{Te[Se2CC(CN)2]2} (III) containing the bidentate chelate ligands 2,2-dicyanethylene-1,1-dithiolate i-mnt, 2,2-dicyanethylene-1,1-thioselenolate i-mnts, and 2,2-dicyanethylene-1,1-diselenolate i-mns have been prepared and characterized by X-ray structure analysis. The central units consist of [M(XX)2E2]2− (M = Se, Te; XX = ligand; E = lone-pair) with fourfold coordinated SeII and TeII, respectively. The complex anions [Se(i-mnt)2E2]2− as well as [Te(i-mnts)2E2]2− show a trapezoide distortion with d(SeS) = 2.276(5); 2.287(5); 2.803(5); 2.789(5) Å and d(TeSe) = 2.611(2); 2.617(3); d(TeS) = 2.889(5); 2.935(4) Å. In III there are centrosymmetric complex anions [Te(i-mns)2E2]2− with nearly identical TeSe-bond-lengths: 2.674(3) and 2.692(2) Å. These TeSe bonds are elongated compared to usual TeSe bonds." @default.
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• W2017341998 title "Strukturen neuer SeII- und TeII-Komplexe mit 2,2-Dicyanethylen-1,1-dithiolat, 2,2-Dicyanethylen-1,1-thioselenolat und 2,2-Dicyanethylen-1,1-diselenolat" @default.
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• W2017341998 doi "https://doi.org/10.1002/zaac.19946200828" @default.
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