Komplexchemie P-reicher Phosphane und Silylphosphane. VII [1]. Bildung und Struktur von [Li(DME)3]2{(SiMe3)[Cr(CO)5]2 P?PP?P[Cr(CO)5]2(SiMe3)} |
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| Authors: | G Fritz E Layher H Krautscheid B Mayer E Matern W Hnle H G V Schnering |
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| Institution: | G. Fritz,E. Layher,H. Krautscheid,B. Mayer,E. Matern,W. Hönle,H. G. V. Schnering |
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| Abstract: | Transition Metal Complexes of P-rich Phosphanes and Silylphosphanes. VII. Formation and Structure of Li(DME)3]2{(SiMe3)Cr(CO)5]2 P-P ? P-PCr(CO)5]2(SiMe3)} Deep red crystals of the title compound 1 are produced in the reaction of LiP(Me3Si)2Cr(CO)5] with 1, 2-dibromoethane in DME. The structure of 1 was derived from the investigation of the 31P-NMR spectra and confirmed by a single crystal structure determination. 1 crystallizes in the space group P1 (no. 2); a = 1307.8(5)pm, b = 1373.1(5)pm, c = 1236.1(4)pm, α = 106.22(4)°, β = 88.00(3)°, γ = 115.52(4)° and Z = 1. 1 forms a salt composed of a dianion R2R4′P42? (R ? SiMe3, R′ ? Cr(CO)5) and solvated Li+ cations. The zigzag shaped dianion possesses the symmetry 1 -Ci. The distances d(P? P) = 202.5(1)pm and d(P? P) = 221.9(1)pm correspond to a double bond and single bonds, respectively. The distances d(Cr? P) = 251.1(1) pm and 255.3(1) pm are larger than those observed so far which might be caused by the charge distribution in the dianion. |
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| Keywords: | [Li(DME)3]2{(SiMe3)[Cr(CO)5] 2 P?P P?P[Cr(CO)5]2[(SiMe3)]} Bis[tris(1 2-dimethoxyethan)lithium(1 +)]-1 4-bis(trimethylsilyl)-1 1 4 4-tetrakis (pentacarbonylchrom(0))-tetraphos-2-phenat(2− ) |
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