Nachweis von π → σ‐Umlagerungen bei Ligandenverdrängungsreaktionen von π‐Allyl‐π‐cyclopentadienyl‐Palladiumkomplexen | Zendy

Parker Graham | Zendy; Werner Helmut | Zendy

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Nachweis von π → σ‐Umlagerungen bei Ligandenverdrängungsreaktionen von π‐Allyl‐π‐cyclopentadienyl‐Palladiumkomplexen

Author(s) -

Parker Graham,

Werner Helmut

Publication year - 1973

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.19730560816

Subject(s) - chemistry , cyclopentadiene , allylic rearrangement , cyclopentadienyl complex , ligand (biochemistry) , medicinal chemistry , lewis acids and bases , stereochemistry , catalysis , organic chemistry , receptor , biochemistry

It has been proved by NMR. measurements at low temperatures that the ligand displacement reactions of (π‐all)Pd(π‐C 5 H 5 ) and Lewis bases L yielding PdL 4 proceed by a π → σ rearrangement of the allylic group as the primary step. The organic reaction product is the 1‐isomer of the corresponding allylcyclopentadiene but in the reactions of (π‐1,1,2‐Me 3 C 3 H 2 )Pd(π‐C 5 H 5 ) with L besides the isomeric allylcyclopentadienes also 2,3‐dimethylbutadiene and cyclopentadiene are formed. The reaction mechanism will be discussed.

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