Scheer, Manfred and Müller, Jan and Schiffer, Michael and Baum, Gerhard and Winter, Rainer F. (2000) Pnictides as Symmetrically Bridging Ligands in Novel Neutral Complexes. Chemistry - A European Journal 6 (7), pp. 1252-1257.
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The reaction of [LWCl] (3) [L=N(CH2CH2NiPr)3] with LiE/SiMe3)2 (E=P, As, Sb) yields the novel, neutral pnictido-bridged complexes [LW=E=WL] (5-7). By following the reaction, which starts from the LiP/SiMe3)2 derivative, by 31P NMR spectroscopy, the formation of an intermediate with a terminal pnictido ligand can be ruled out. The paramagnetic complexes 5-7 are comprehensively spectroscopically characterised. The X-ray structure analysis of the heterocumulenes 5-7 reveals a linear structure in which the two W-tren units bind to the central pnictido atom in a staggered conformation [tren=tren-based ligand; tren=tris(2-aminoethyl)amine. When N2 is used as the inert gas in the synthesis of the starting material [WCl] [Np=CH2C(CH3)3], the complex [2(,1:1-N2)] (4) is formed as a side product. Complex 4 possesses a hydrazido(4-) (N24-) ligand connected by two tungsten-tren moieties.
|Date:||3 April 2000|
|Institutions:||Chemistry and Pharmacy > Institut für Anorganische Chemie > Chair Prof. Dr. Manfred Scheer|
|Keywords:||antimony; heterocumulenes; pnictides; tripodal ligands; tungsten|
|Subjects:||500 Science > 540 Chemistry & allied sciences|
|Created at the University of Regensburg:||Unknown|
|Deposited On:||21 Jun 2010 12:35|
|Last Modified:||20 Jul 2011 22:30|