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Original Articles

STABILISATION DES CYCLOPENTADIENYL-HALOGENOPHOSPHINES PAR COMPLEXATION SUR LE PHOSPHORE

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Pages 317-323 | Received 24 May 1983, Published online: 19 Dec 2006
 

Abstract

Several halocyclopentadienylphosphines CpPCl2, Cp2PBr and CpP(Ph)Cl (1–3) have been made by low temperature reaction of cyclopentadienylthallium with the appropriate halophosphines and stabilized by P-complexation with W(CO)5. In the complexes thus obtained, the phosphorus atom is connected with the sp3 carbon of the cyclopentadienyl ring but the molecules are not fluxional at room temperature probably because of the steric bulk of the phosphorus substituents. The [4 + 2] cycloadducts of [CpPCl2]W(CO)5 with N-phenyl maleimide 5 and dimethyl acetylenedicarboxylate 6 are also described.

Plusieurs halogenocyclopentadiénylphosphines: CpCl2, Cp2PBr et CpP(Ph)Cl (1–3), ont été obtenues par réaction à basse température du cyclopentadiénylthallium sur les halogénophosphines appropriées et stabilisées par complexation du phosphore avec le groupement W(CO)5. Dans les complexes ainsi obtenus, le phosphore est connecté au carbone sp3 du cycle cyclopentadiényle mais les molécules ne sont pas fluxionnelles probablement à cause de la taille des substituants phosphorés. Les cycloadduits [4 + 2] de [CpPCl2]W(CO)5 avec la N-phénylmaléimide 5 et l′acétylènedicarboxylate de méthyle 6 sont également décrits.

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