Controlled synthesis of carbons-adjacent and-apart nido -and
arachno-carborane anions and their metal complexes*
Zuowei Xie
Department of Chemistry, The Chinese University of Hong Kong, Shatin, New
Territories, Hong Kong, China
Abstract: The controlled synthesis of carborane anions is a
difficult challenge and is of great interest to synthetic chemists.
By varying the bridge length of cage carbons-linked o-carboranes,
the two cage carbon atoms are locked in place during the reactions,
leading to the controlled synthesis of ortho-, meta- and
para-isomer of nido-carborane dianions. The isomers of
arachno-carborane tetraanions can also be prepared in the controlled
manner via chang- ing the electronic configuration of the transition-metal
ions or the bridge length. This article provides an overview of our
recent work on this subject.
*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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