Anthracen- und Phenanthren-Cobalt-Verbindungen mit Trimethylphosphan-Liganden / Anthracene and Phenanthrene Cobalt Compounds Containing Trimethylphosphane Ligands
Open Access
- 1 October 1985
- journal article
- Published by Walter de Gruyter GmbH in Zeitschrift für Naturforschung B
- Vol. 40 (10) , 1377-1382
- https://doi.org/10.1515/znb-1985-1023
Abstract
Anthracene and phenanthrene complexes of zerovalent cobalt, Co(Cl4H10)(PMe3)3, are obtained by substitution of olefin in Co(olefin)(PMe3)3 (olefin = propene, cyclopentene). Ethene replaces the η2-bonded aromatic molecules. Substitution labile ligands L′ in hydridocobalt complexes CoH(L′)(PMe3)3 (L′ = N2, C4H8) give way to an anthracene or phenanthrene ligand and can in turn be replaced by carbon monoxide. η4-Coordinated anthracene in Co[Sn(C6H5)3](C14H10)(PMe3)2 is not replaced by CO under normal conditions. In η2-coordinated anthracene the bond between coordinated C-atoms in ring positions 2 and 3 is elongated by 8.9 pm when compared with free anthracene, deviations from planarity of six-membered rings are slight. η4-Coordinated anthracene contains a naphthalin-type planar part and. in the coordinated ring with the longer CC-bonds, shows a folding away from the cobalt atom.Keywords
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