Objectif Metalloporphyrin and oxometalloporphyrins containing the elements aluminium, platinum, titanium, vanadium, niobium, tantalum, chromium, molybdenum, tungsten, rhenium, ruthenium, osmium and arsenic have been synthesised and characterised. The porphyrin complexes of these metals were tested as epoxidation catalysts by use of a screening procedure. The nonmetallic elements selenium and tellurium could not be introduced into the porphyrin system. No activity was found with the porphyrin complexes of aluminium and platinum, and those of titanium, vanadium and osmium were only of minor activity. Niobium, tantalum and arsenic derivatives showed some activity, and the molybdenum, tungsten and rhenium derivatives the most promising activity.Significant improvements in the syntheses of the porphyrin complexes of niobium, tantalum, arsenic, molybdenum, tungsten and rhenium were made. The large scale syntheses of molybdenum, tungsten and rhenium porphyrins were achieved, and complexes of these metals with porphyrin ligands of a more refined nature, especially of water soluble were synthesised. A hitherto unknown unstable reaction product of oxotungsten(V) porphyrins with hydrogen peroxide was detected.New metalloporphyrins and transition metal bases were developed as selective homogeneous catalysts for epoxidation of olefins with hydrogen peroxide.Electrophilicty was increased by means of novel oxomolybdenum (v), oxotungsten (v) and oxorhenium (v) porphyrin catalysts for which efficient large scale syntheses were developed, in experiments using both aqueous and anhydrous hydrogen peroxide solutions.Nucleophilicity was increased by optimizing the catalytic behaviour of P2PtCF3X catalysts. This proved the most advantageous process studied because of the compatibility of the platinum catalysts with all grades of hydrogen peroxide.HYDROGEN PEROXIDE IS AN ATTRACTIVE OXIDANT FROM THE STANDPOINT OF COST, AND BECAUSE WATER IS ITS ONLY REDUCTION PRODUCT NEW CATALYTIC OXIDATION SYSTEMS SHOULD ACHIEVE AN INCREASING IMPORTANCE COMPARED TO MORE CONVENTIONAL OXIDANTS.THE OBJECTIVE OF THE PROGRAMME WAS THE DEVELOPMENT OF SELECTIVE HOMOGENEOUS OXIDATION CATALYSTS FOR REACTIONS (EPOXIDATION, HYDROXYLATION OF PHENOLS) WITH HYDROGEN PEROXIDE AS OXIDANT WHICH IN TURN IMPROVE ITS REACTIVITY, I.E. INCREASE EITHER THE ELECTROPHILICITY OR THE NUCLEOPHILICITY OF HYDROGEN PEROXIDE. Champ scientifique natural scienceschemical scienceselectrochemistryelectrolysisnatural scienceschemical sciencesinorganic chemistrytransition metalsnatural scienceschemical sciencesinorganic chemistrypost-transition metalsnatural scienceschemical sciencescatalysisnatural scienceschemical sciencesinorganic chemistrymetalloids Programme(s) FP1-BRITE - Multiannual research and development programme (EEC) in the fields of basic technological research and the applications of new technologies (BRITE), 1985-1988 Thème(s) Data not available Appel à propositions Data not available Régime de financement CSC - Cost-sharing contracts Coordinateur DEGUSSA AG Contribution de l’UE Aucune donnée Adresse Benningsenplatz 1 40474 DUESSELDORF Allemagne Voir sur la carte Coût total Aucune donnée Participants (3) Trier par ordre alphabétique Trier par contribution de l’UE Tout développer Tout réduire DARMSTADT UNIVERSITY OF TECHNOLOGY Allemagne Contribution de l’UE Aucune donnée Adresse Karolinenplatz 5 DARMSTADT Voir sur la carte Coût total Aucune donnée Università degli Studi di Venezia Italie Contribution de l’UE Aucune donnée Adresse Dorsoduro 2137 30123 Venezia Voir sur la carte Coût total Aucune donnée WISE & MUNRO LEARNING RESEARCH Pays-Bas Contribution de l’UE Aucune donnée Adresse 8,Azaleastraat 85 2565 CD DEN HAAG Voir sur la carte Liens Site web Opens in new window Coût total Aucune donnée