Dendritic catalysts: Reactivity and mechanism of the dendritic bis(oxazoline)metal complex catalyzed Diels-Alder reaction

Macromolecules

Volumn 30, Issue 4, 1997, Pages 1228-1230

  Mak, Chi Ching ^a   Chow, Hak Fun ^a  

^a CHINESE UNIVERSITY OF HONG KONG   (Hong Kong)

Author keywords

[No Author keywords available]

Indexed keywords

CATALYST SELECTIVITY; CATALYSTS; CHEMICAL BONDS; COMPLEXATION; DIFFERENTIAL EQUATIONS; ENZYME KINETICS; MATHEMATICAL MODELS; METALLIC COMPOUNDS; MORPHOLOGY; REACTION KINETICS; SOLUBILITY; SYNTHESIS (CHEMICAL);

BIS(OXAZOLINE)METAL COMPLEX; DENDRIZYMES; DIELS-ALDER REACTION; METALLODENDRITIC CATALYSTS; MICHAELIS/MENTEN EQUATIONS;

CATALYSIS;

EID: 0031076368     PISSN: 00249297     EISSN: None     Source Type: Journal    
DOI: 10.1021/ma961281r     Document Type: Article

References (21)

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17. max at approximately 720 nm. However, dendritic ligands of higher generations required a longer time (3 h) for complete complexation than ligands of lower generations (1 h). The dendrizyme complexes did not lose their catalytic activities in 1 week on standing at 20 °C.
18. t (adduct P) = 11.4 min.
19. In this kinetic experiment involving three reacting partners, pseudo-order kinetic conditions were satisfied by keeping the concentrations of two of the components constant. This condition was automatically fulfilled by the catalyst component because it was continuously regenerated and therefore remained constant during the reaction. The concentration of the other component was maintained essentially constant by using a large excess of this reagent. Only the initial kinetic data of the reaction with less than 15% product conversion were taken into account. Separate pseudo-first-order measurements were conducted with each reactant (apart from the catalyst 20) in excess.
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