ISSN:
0009-2940
Keywords:
Copper complexes, Cu8/Phosphido bridges/Oligophosphaalkanes
;
Chemistry
;
Inorganic Chemistry
Source:
Wiley InterScience Backfile Collection 1832-2000
Topics:
Chemistry and Pharmacology
Notes:
Linear Oligophosphaalkanes, XXIV. - Syntheses and Structural Characterisation of Cu8 Complexes with Electron-Deficient Phosphido BridgesReaction of silylphosphanes (Me3Si)RP-CH2-PR(SiMe3) (R = iPr, tBu, 2,4,6,-Me3C6H2) with four equivalents of copper(1) halides CuX (X = Cl, Br) or a mixture of two equivalents of CuCl and Cul in the presence of pyridine as an auxiliary ligand affords octanuclear copper(1) complexes of composition Cu8X4(RP-CH2-PR)2(Py)n(CH3CN)m (n = 5, m = 0; n = 4, m = 1; X = Cl, Br, I). Multinuclear compounds of this type may also be obtained by deprotonation of the disecondary phosphanes HRP-CH2-PRH (R = iPr, Ph, 2,4,6-Me3C6H2) with strong organic bases (DBU) in the presence of CuCl and pyridine. The X-ray structural analysis of Cu8Cl4(iPr-P-CH2-PiPr)2(Py)5 (3a) (space group P21/c) reveals a Cu4(P-C-P)2 skeleton to which four CuCl(Py)n units (n = 1, 2) are coordinated by Cu-Cl and Cu-P bridges. The phosphorus atoms of the electron-deficient μ3-PRR′ bridges formed thereby show a distorted trigonal bipyramidal coordination with almost planar PCu3 units. Due to the multiple bridging of the Cu(I) ions in 3a the Cu⃛Cu distances in the Cu8 complex are relatively short (247.1-276.5 pm).
Additional Material:
2 Ill.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1002/cber.19901230402
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