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X-ray structures of two five-coordinated Nickel(I) complexes with the tripod ligands tris(2-diphenylphosphinoethyl)amine and tris(2-diphenylarsinoethyl)amine

✍ Scribed by P. Dapporto; L. Sacconi

Publisher: Elsevier Science
Year: 1980
Tongue: English
Weight: 523 KB
Volume: 39
Category: Article
ISSN: 0020-1693
DOI: 10.1016/s0020-1693(00)93635-1

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✦ Synopsis

The tripod ligands tris(2-diphenylphosphinoethyl)amine, np,, and tris(2-diphenylarsinoethyl)amine, ms3, form nickel(I) complexes having formulas Ni(np,)I and Ni(nas,)I. 7Fzese complexes have been studied by X-ray analysis, using diffractometric data. The two compounds are isomorphous, monoclinic, space group

Cc, with the following cell constants: Ni(npJI, a = 10.4 74(4), b = 21. I6 7( 7), c = 16.986(6) II /3 = 99.11(4)"; Ni(nas& a = 10.699(4), b = 21.445(7), c = 16.846(6) A 0 = 98.19(4/O. The structures were refined by least-squares techniques to final TABLE I. Crystal Data and Data Collection Details. R factors of 0.069 and 0.041 for the np3 and nas3 derivatives, respectively. The structures consist of discrete triional-bipyramidal molecules. Some peculiar structural features are discussed on the basis of the crystal field theory.

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