An unprecedented coordination mode for hemilabile pendant-arm 1,4,7-triazacyclononanes and the synthesis of cationic organoaluminium complexes

Citation
Da. Robson et al., An unprecedented coordination mode for hemilabile pendant-arm 1,4,7-triazacyclononanes and the synthesis of cationic organoaluminium complexes, CHEM COMMUN, (14), 2000, pp. 1269-1270
Citations number
18
Categorie Soggetti
Chemistry
Journal title
CHEMICAL COMMUNICATIONS
ISSN journal
13597345 → ACNP
Issue
14
Year of publication
2000
Pages
1269 - 1270
Database
ISI
SICI code
1359-7345(2000):14<1269:AUCMFH>2.0.ZU;2-M
Abstract
Reaction of AlMe3 or [AlMe3. py] with the pendant arm OH-funtionalised 1,4, 7-triazacyclononane proligands, HL1 or HL2, affords the four- and five-coor dinate derivatives [Al(L-1)Me-2] 1 or [Al-2(L-2)(2)Me-4] 2 in which the pen dant alkoxide O-donor and only one macrocycle N-donor is bound to Al; methy l anion abstraction from 1 yields cationic, pentacoordinate [Al(L-1)Me](+) in which L-1 has a tetradentate coordination mode [L-1 = 1-(2-hydroxy-3,5-d i-tert-butylbenzyl)-4,7-diisopropyl-1,4,7-triazcyclononane; L-2 = 1-(2-hy- droxy-2-methylethyl)-4,7-diisopropyl-1,4,7-triazacyclononane].