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[Cu4(NPMe3)3(O2C?CH3)5] – ein tetramerer Phosphaniminato-Komplex von Kupfer(II). Synthese,Kristallstruktur, magnetisches Verhalten und EPR-Spektrum
Authors:R Meyer Zu Kcker  J Pebler  C Friebel  K Dehnicke  D Fenske
Institution:R. Meyer Zu Köcker,J. Pebler,C. Friebel,K. Dehnicke,D. Fenske
Abstract:Cu4(NPMe3)3(O2C? CH3)5] – a Tetrameric Phosphorane Iminato Complex of Copper(II). Synthesis, Crystal Structure, Magnetic Behaviour, and EPR Spectrum The title compound and the corresponding benzoate complex Cu4(NPMe3)3(O2C? C6H5)5] have been prepared by reactions of copper(II)acetate and copper(II)benzoate, respectively, with Me3SiNPMe3 in dichloromethane. Both complexes are characterized by IR spectroscopy. The acetate complex is additionally characterized by the measurement of the magnetic susceptibility, by its EPR spectrum, and by a crystal structure determination. Cu4(NPMe3)3(O2C? CH3)5] · CH2Cl2: Space group I41/a, Z = 16, structure solution with 7 960 independent reflections, R = 0.044. Lattice dimensions at ?70°C: a = b = 3 670.6; c = 1 091.9 pm. The structure consists of four Cu atoms which are arranged at the corners of a distorted tetrahedron with Cu…?Cu distances between 290 and 318 pm. Three of the faces of the tetrahedron are linked by μ3-N atoms of the phosphorane iminato groups. Three of the acetate ligands form chelates, the other two are monofunctionally coordinated. Three of the copper atoms have a planar surrounding, the forth Cu atom has a (4 + 1) coordination.
Keywords:Phosphorane Iminato Complexes  Copper(II)  Synthesis  Magnetic Behaviour  EPR Spectrum  Crystal Structure
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