synthesized. These complexes were characterized by 1H and 13C NMR spectroscopy and elemental analyses. The solid-state structures of complexes 2 and 3 were determined by X-ray diffraction. Complexes 1, 2, 3, and 4 were highly active initiators for the ring-opening polymerization of L-lactide (L-LA) and rac-lactide (rac-LA). The experimental results show that complexes 1 and 2 are highly active and excellent
锆配合物(L 2 Zr,L = –OC 6 H 2 -4-R 1 -6-R 2 -2-CH 2 -N [(CH 2)3 -N(CH 2 CH 2)2 O] -CH 2 -4-R 1 -6-R 2 -C 6 H 2 O–,R 1 = Me,R 2 = t Bu,络合物1; R 1 = R 2 = t Bu,络合物2制备了含有两个对称的
氨基双(
酚盐)
配体的)。此外,
钛络合物(LTi(O i Pr)2,L = –OC 6 H 2 -4-R 1 -6-R 2 -2-CH 2 -N [(CH 2)3 -N(CH 2 CH 2)2 O] -CH 2 -4-R 1 -6-R 2 -C 6 H 2 O–,R 1 = Me,R 2 = t Bu,络合物3; R 1 = R 2 = t合成了基于对称
氨基双(
酚盐)
配体的Bu,络合物4)。这些配合物通过1 H和13 C NMR光谱法和元素分析进行表征。配合物2和