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Abstract

Attempts to prepare organouranium compounds containing both the indenyl ligand and the acetonitrile (as a neutral nitrogen donor) ligand yielded the title compound. It crystallizes in the trigonal space group P3 with a = 24.465(6), c = 8.944(4) ANGSTROEM, Z = 3. The structure was solved by direct methods. Full-matrix least- squares refinement with only U and Br atoms treated anisotropically gave an R of 0.051 for 1454 observed reflections. The present compound contains, as a cationic species, the first example of an organouranium complex exhibiting a pentagonal bipyramidal configuration (coordination number seven) about the uranium atom. In the cation coordination polyhedron, one bromine atom and one indenyl ligand occupy transaxial positions while the nitrogen atoms of four acetonitrile ligands together with a second bromine atom lie in the equatorial plane. The five membered ring of the indenyl ion would be eta3 covalently bonded to the uranium.

Additional information

Authors: SPIRLET M R, UNIVERSITE DE LIEGE AU SART TILMAN, LIEGE (BELGIUM);JRC - KARLSRUHE ESTAB. (GERMANY);REBIZANT J, UNIVERSITE DE LIEGE AU SART TILMAN, LIEGE (BELGIUM);JRC - KARLSRUHE ESTAB. (GERMANY);GOFFART J UNIVERSITE DE LIEGE AU SART TILMAN, LIEGE (BELGIUM), UNIVERSITE DE LIEGE AU SART TILMAN, LIEGE (BELGIUM);JRC - KARLSRUHE ESTAB. (GERMANY);JRC - KARLSRUHE ESTAB. (GERMANY), UNIVERSITE DE LIEGE AU SART TILMAN, LIEGE (BELGIUM);JRC - KARLSRUHE ESTAB. (GERMANY)
Bibliographic Reference: LANTHANIDE AND ACTINIDE RESEARCH, VOL. 1 (1986), PP. 273-283
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