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Kolekcje
Inne
Synthesis, characterization, and catalytic studies of (aryloxido)magnesium complexes.
Autorzy
Rok wydania
2010
Czasopismo
European Journal of Inorganic Chemistry
Strony
3602-3609
DOI
10.1002/ejic.200901207
Kolekcja
Język
Angielski
Typ publikacji
Artykuł
The reaction of MgBu2 with 1 equiv. of four‐coordinating (R)‐ or rac‐N,N‐bis(3,5‐di‐tert‐butylbenzyl‐2‐hydroxy)tetrahydrofurfurylamine (R/rac‐bpthfa‐H2) gave dinuclear homoleptic [Mg(μ‐R/rac‐bpthfa)]2 (R/rac‐2c) as white powders in54–67 % yields. Analogous reactions of MgBu2 with 2 equiv. of two‐coordinating N‐(3,5‐di‐tert‐butylbenzyl‐2‐hydroxy)‐N‐methylcyclohexanamine (tbpca‐H; 1e‐H) and (S)‐N‐(3,5‐di‐tert‐butylbenzyl‐2‐hydroxy)‐N,α‐dimethylbenzylamine(S‐tbpmpa‐H; S‐1f‐H) gave white crystals of homoleptic mononuclear compounds of general formula [Mg(L)2] (2e and S‐2f) in 87–89 % yields. The resulting aminophenolates were characterized by spectroscopic methods and, in the case of R‐2c and S‐2f, by X‐ray crystallography. The new complexes R/rac‐2c, 2e, and S‐2f, as well as the previously described homo‐ and heteroleptic tetranuclear [Mg(ddbfo)2]4 (2a), [Mg(thffo)2]4 (2b), [Mg4(μ3‐OMe)2(μ,η2‐ddbfo)2(μ,η1‐ddbfo)2(η1‐ddbfo)2(MeOH)5]·CH3OH·thf (3a·CH3OH·thf) and [Mg4(μ3,η2‐thffo)2(μ,η2‐thffo)2(Ph3SiO)2] (4b), were tested in the polymerization of lactide to reveal good activity only in the case of mononuclear four‐coordinate species grafted with an external donor, benzyl alcohol.
Słowa kluczowe
Aminophenolates, Magnesium, Lactides, polymerization, structure elucidation
Adres publiczny
https://doi.org/10.1002/ejic.200901207
Strona internetowa wydawcy
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