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- Title
Exo- und endo-Tricarbonyleisenkomplexe von bicyclischen 2,3-Dimethylidenverbindungen.
- Authors
Steiner, Ulrich; Hansen, Hans-Jürgen; Bachmann, Kurt; Von Philipsborn, Wolfgang
- Abstract
Exo- and endo-Tricarbonyliron Complexes of Bicyclic 2,3-Dimethylidene Compounds. The preparation of exo- and endo-tricarbonyliron complexes ( exo- and endo- 5, -6, -8, and 9) of 2,3-dimethylidene-5-bicyclo[2.2.1]heptene( 1), -bicyclo[2.2.1]-heptane ( 2), -5-bicyclo[2.2.2]octene ( 3) and -bicyclo[2.2.2]octane ( 4) is described. The complexes are obtained by thermal reaction of the bicyclic butadienes with di-ironenneacarbonyl in hexane solution. exo- and endo- 5 are also formed photochemically from ironpentacarbonyl and 1 in pentane solution at −35°. The structural assignment of exo- and endo -5 and -6 is based on their mass-spectra and on coordination shifts in 1H- and 13C-NMR.-spectra exo- and endo -6 are correlated with exo- and endo -5, respectively, by hydrogenation. Hydrogenation of the uncomplexed double bond in exo- and endo -5 occurs in both complexes from the exo side as shown by deuteration experiments. The free ligand 1 reacts in the same stereospecific manner.
- Publication
Helvetica Chimica Acta, 1977, Vol 60, Issue 2, p643
- ISSN
0018-019X
- Publication type
Article
- DOI
10.1002/hlca.19770600237