Die Umsetzungen von MoNCl3 bzw. WNCl3 mit Lithium‐Diphenylamid in Tetrahydrofuran führen zu den monomeren Nitridokomplexen MN(NPh2)3 mit KZ = 4 an den Metallatomen. Bei Anwesenheit von Lithium‐n‐butyl reagiert LiNPh2 mit WNCl3 auch zu dem tetrameren, Wolfram(V) und Wolfram(VI) enthaltenden Nitridokomplex [W4N4(NPh2)6(OnC4H9)2]. Die Verbindungen werden durch ihre IR‐Spektren, zum Teil durch die 1H‐ und 13C‐Kernresonanzspektren sowie durch Röntgenstrukturanalysen charakterisiert.
MoN(NPh2)3: Raumgruppe P1, Z = 2, 4060 unabhängige beobachtete Reflexe, R = 3,1%. Gitterabmessungen bei 20°C: a = 956,2(4); b = 1015,9(2); c = 1598,1(3) pm; α = 79,06(2)°; β = 85,67(3)°; γ = 82,57(3)°. Die Verbindung bildet monomere Moleküle mit Bindungslängen MoN 163,4 pm und MoNPh2 von im Mittel 199,2 pm.
[W4N4(NPh2)6(OnC4H9)2]: Raumgruppe P21/n, Z = 2, 1903 beobachtete unabhängige Reflexe, R = 3,9%. Gitterabmessungen bei 19°C: a = 1 582,2(3); b = 1 182,4(2); c = 2 053,3(4) pm; β = 103,77(2)°. Die Verbindung bildet zentrosymmetrische Moleküle, deren zentrale W—W‐Hantel (Bindungslänge 253,5 pm) über die Nitridoliganden zweier WN2(NPh2)2‐Einheiten mit T‐förmiger Anordnung der N‐Atome verknüpft ist.
In order to study long-distance intermetallic communication between bis(arene)metals, we have synthesized the binuclear complexes [(MeaP-^-CeHs^MhCoaCu-COMCOla (14, M = V; 15, M = Cr) in which the sandwich units are separated by the (-Me2P)2Co2(CO)4(P-ß2-)2 spacer. 14 crystallizes in the monoclinic space group P2\/c, Z = 4, a = 1465.2(3), b =
Ph4P)2[Be2F6]·2CH3CN: Synthesis, IR Spectra, Crystal Structure, and Quantum Chemical Calculations. -Colorless single crystals of the title compound are synthesized by reaction of (Ph4P)2[Be2Cl6] with excess AgF in MeCN (20°C, 48 h). The compound is characterized by IR spectroscopy, XRD, and DFT (BP86) and ab initio (CCSD(T)) calculations. The compound crystallizes in the triclinic space group P1 with Z = 1 and contains isolated [Be2F6] 2ions of Ci symmetry. -(TONNER, R.; FRENKING, G.; NEUMUELLER, B.; DEHNICKE*, K.
Carbonyl Compounds. -The complex can be used as a non-metal, air-and water-stable oxidant. -(HERAVI*, M. M.; DERIKVAND, F.; GHASSEMZADEH, M.; NEUMUELLER, B.; Tetrahedron Lett. 46 (2005) 37, 6243-6245; Dep. Chem., Sch. Sci., Azzahra Univ., Tehran, Iran; Eng.) -Mais 50-045
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