1.
Dalton Trans
; 40(6): 1396-400, 2011 Feb 14.
Article
in English
| MEDLINE
| ID: mdl-21206944
ABSTRACT
The reaction of N,N'-dibenzyl-2-amino-4-imino-pent-2-ene, nacnac(Bn)H, with 1 or 2 equiv. of MgnBu2 afforded the homoleptic complex nacnac(Bn)2Mg. The reaction of nacnac(Bn)H with Mg(N(SiMe3)2)2 yielded nacnac(Bn)MgN(SiMe3)2, which reacted with tert-butanol to form nacnac(Bn)MgOtBu. The latter complex crystallizes as an alkoxide bridge dimer and is active in the ring-opening polymerisation of rac-lactide. Polymerisations at room temperature afforded atactic polylactide, while polymerisations at -17 and -26 °C afforded polylactide with a small isotactic bias (P(m) = 0.52, and 0.55, respectively).