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Cyclopentadienyl‐Metallverbindungen. 1. Zusammenhang zwischen Stabilität und Dissoziationsenergien von Metall‐Kohlenstoffbindungen in M 5 H 5 ‐Komplexen
Author(s) -
Egger Kurt W.
Publication year - 1969
Publication title -
helvetica chimica acta
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.74
H-Index - 82
eISSN - 1522-2675
pISSN - 0018-019X
DOI - 10.1002/hlca.19690520803
Subject(s) - chemistry , covalent bond , crystallography , metal , cyclopentadienyl complex , transition metal , bond dissociation energy , dissociation (chemistry) , electron deficiency , metallic bonding , thermal stability , organic chemistry , catalysis
The existence and thermal stability of CH( 3 ) M(σC 5 H 5 ) compounds has been viewed in terms of the bond dissociation energies involved, which predict the two‐center covalent two‐electron metal‐σC 5 H 5 bond to be ∼30 kcal/mole less stable than the parent metal‐CH 3 bond. The available experimental data are shown to be consistent with this prediction. Electron donating ligands can lead to stable two‐center diene‐type covalent metal‐C 5 H 5 bonds, even where the two‐electron σ‐bond would not be stable. With the exception of group IIB, transition metals are not capable of forming stable metal‐σC 5 H 5 complexes.