Supramolecular Catalysis of Ester and Amide Cleavage by a Dinuclear Barium(II) Complex
โ Scribed by Roberta Cacciapaglia; Stefano Di Stefano; Erik Kelderman; Luigi Mandolini
- Publisher
- John Wiley and Sons
- Year
- 1999
- Tongue
- English
- Weight
- 134 KB
- Volume
- 38
- Category
- Article
- ISSN
- 0044-8249
No coin nor oath required. For personal study only.
โฆ Synopsis
Five components spontaneously self-assemble to yield the productive complex 1, where one barium ion delivers an ethoxide to the carbonyl group of an amide substrate anchored by means of a distal carboxylate moiety to the other barium ion. High substrate specificity, fairly high reaction rates with catalytic turnover, and competitive inhibition by inert substrates are observed.
๐ SIMILAR VOLUMES
T = 25 "C, t = 3.5 h) also showed that complex 1 is able to perform more than 36 000 (yield 99.9 YO) without loss of activity. In order to rule out the participation in the catalysis of free, solvated [Rh(PPh,),]+ or similar cationic species formed by dissociation of complex 1, two independent expe
## Abstract Five new, bifunctional imidazoliumโthioether ligands of the general formula RS(CH~2~)__~n~__(imidazolium)^+^ArBr^โ^ (__n__ = 2 or 3, R = Et or __t__Bu, Ar = 2,4,6โtrimethylphenyl or 2,6โdiisopropylphenyl) have been synthesised in good overall yields by a general method and used as Nโhet