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Well‐Defined Aminophenolate Zinc and Magnesium Complexes as Excellent Inhitiators for the ROP of Lactides
Author(s) -
Ejfler Jolanta,
Szafert Sławomir,
Sobota Piotr
Publication year - 2010
Publication title -
macromolecular symposia
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.257
H-Index - 76
eISSN - 1521-3900
pISSN - 1022-1360
DOI - 10.1002/masy.201051012
Subject(s) - homoleptic , zinc , ring opening polymerization , methylene , dispersity , magnesium , polymerization , chemistry , polymer chemistry , polymer , cyclohexylamine , catalysis , methylene blue , diastereomer , medicinal chemistry , nuclear chemistry , organic chemistry , photocatalysis , metal
A series of molecular homo and heteroleptic zinc and magnesium compounds with aminophenolate ligands [(µ,η 2 ‐L 2 )ZnEt] 2 ( 1 ), [(η 2 ‐L 2 )Zn(µ‐BnO)] 2 ( 2 ), [Zn(η 2 ‐L 2 ) 2 ] ( 3 ), [Zn(η 2 ‐L 3 ) 2 ] ( 4 ), [Mg(η 2 ‐L 3 ) 2 ] ( 5 ) (L 2 ‐H =  N ‐[methylene(2‐hydroxy‐3,5‐di‐ tert ‐butylphenyl)]‐ N ‐methyl‐ N ‐cyclohexylamine, L 3 ‐H =  N ‐[methylene(2‐hydroxy‐3,5‐di‐ tert ‐butylphenyl)]‐ N ‐methyl‐ N ‐methyl‐1,3‐dioxolaneamine) have been prepared and characterized. The homoleptic complexes 3–5 are most probably a mixture of diastereoisomers that in solution show an interesting dynamics which plays an important role in their catalytic behavior. The complexes 2 – 5 are efficient initiators in ring‐opening polymerization (ROP) of lactides to produce polymers with desired molecular weight and narrow polydispersity.

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