Synthesis and properties of linear, branched, and cyclic metallacarborane
oligomers*
Russell N. Grimes
Department of Chemistry, University of Virginia, Charlottesville,
VA 22904, USA
Abstract: A rapidly developing area of organometallic chemistry
centers on polynuclear metal coordination compounds having specified,
highly symmetric geometries such as squares, triangles, rectangles,
or rigid rods. Interest in such molecules arises in part from their
unusual, aesthetically appealing structures, and on the possibilities
for assembling them into extended systems having useful electronic,
optical, magnetic, catalytic, or other properties. Given their characteristic
thermal and oxidative stability, chemical versatility, and relatively
low-bulk, metallocene-like steric requirements, small metallacarboranes
are attractive candidates as building blocks for such structures. Recent
work in our laboratory on the controlled substitution and linkage of
these clusters has opened the way to some new metallacarborane �designer
�chemistry that is described in this article.
*Lecture presented at the XIth International Meeting
on Boron Chemistry (IMEBORON XI), Moscow, Russia, 28 July - 2 August
2002. Other presentations are published in this issue,
pp. 1157-1355.
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