PUB - Publikationen an der Universität Bielefeld

Cyclopentadienyl (Cp) compounds of s-, p-, d-, and f-block elements with donor functionalities in the side-chain of the Cp fragment have attracted a lot of attention during the last decade. In this article, the structure and reactivity of representative compounds with tethered NR,, OR, PR,, SR, and CH=CHR groups are described; one, two (in 1,3 position) or five donors are attached with C-n or SiCn spacers to the Cp fragment. Intra- or intermolecular donor-acceptor interactions can be classified with the help of the HSAB concept. A 'hard-soft' coordination promotes hemilability and causes interesting effects concerning reactivity. Side-chain-functionalized compounds find application in catalysis, CVD and related techniques, molecular recognition, organometallic chemistry in water, and dendrimer synthesis. Perspectives in these fields are presented. (C) 2000 Elsevier Science S.A. All rights reserved.