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- W2157791693 abstract "Die Titelverbindung entsteht in langsamer Reaktion aus AsPh4[WNCl4] in Acetonitril in Form dunkelbrauner Kristalle. Die Kristallstruktur wurde mittels Röntgenbeugung ermittelt und mit 1461 beobachteten, unabhängigen Reflexen bis zu einem R-Wert von 4,7% verfeinert. (AsPh4)2[W2NCl10] kristallisiert monoklin in der Raumgruppe P21/n mit zwei Formeleinheiten pro Elementarzelle. Die Struktur besteht aus AsPh4θ-Ionen und [W2NCl10]2θ-Ionen. Die beiden Wolframatome der Oxidationszahlen fünf bzw. sechs sind durch eine asymmetrische, gestreckte Nitridobrücke verknüpft (r WN = 171 bzw. 203 pm). Die durch π-Bindungen verstärkten WN-Bindungen verursachen einen trans-Effekt, der sich in dem deutlich größeren Bindungsabstand WCl (trans) von 243 pm gegenüber dem mittleren Abstand WCl(äquatorial) von 230 pm äußert. Crystal Structure of (AsPh4)2[W2NCl10] The title compound is formed by a slow reaction of AsPh4[WNCl4] in acetonitrile solution in form of dark brown crystals. The crystal structure was solved by X-ray diffraction methods (R = 4.7%; 1461 observed, independent reflexions). (AsPh4)2[W2NCl10] crystallizes in the monoclinic space group P21/n with two formula units per unit cell. The structure consists of AsPh4θ and [W2NCl10]2θ ions. The tungsten atoms with oxidation numbers five and six respectively, are linked by a linear, asymmetric nitrido bridge (r WN = 171 and 203 pm). The trans-effect of the WN-multiple bonds causes a significant difference between axial (WClax 243 pm) and equatorial (mean WCleq 230 pm) bond lengths." @default.
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- W2157791693 date "1982-01-01" @default.
- W2157791693 modified "2023-10-16" @default.
- W2157791693 title "Die Kristallstruktur von (AsPh4)2[W2NCl10]" @default.
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- W2157791693 doi "https://doi.org/10.1002/zaac.19824840109" @default.
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