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New homoleptic bis(pyrrolylpyridiylimino) Mg(II) and Zn(II) complexes as catalysts for the ring opening polymerization of cyclic esters via an “activated monomer” mechanism
Dalton Transactions ( IF 3.5 ) Pub Date : 2017-08-18 00:00:00 , DOI: 10.1039/c7dt02445b Ilaria D'Auria 1, 2, 3, 4, 5 , Consiglia Tedesco 1, 2, 3, 4 , Mina Mazzeo 1, 2, 3, 4, 5 , Claudio Pellecchia 1, 2, 3, 4, 5
Dalton Transactions ( IF 3.5 ) Pub Date : 2017-08-18 00:00:00 , DOI: 10.1039/c7dt02445b Ilaria D'Auria 1, 2, 3, 4, 5 , Consiglia Tedesco 1, 2, 3, 4 , Mina Mazzeo 1, 2, 3, 4, 5 , Claudio Pellecchia 1, 2, 3, 4, 5
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The reaction of MgBu2 and ZnEt2 or Zn{N[Si(CH3)3]2}2 with a tridentate monoanionic pyrrolylpyridiylimino [N−,N,N] proligand gave homoleptic species, as exclusive products, in high yields. The complexes were characterized in solution by 1D and 2D NMR analysis and by single crystal X-ray crystallography. The new homoleptic complexes were tested as initiators in the polymerization of ε-caprolactone and lactide in the presence of an exogenous alcohol. For both complexes, the polymerizations proceed via an “activated monomer” mechanism that, in the case of the magnesium complex, was correlated with the coordinative flexibility of the ligands, resulting in extremely high productivities under mild conditions.
中文翻译：
新型均衡双（吡咯基吡啶基亚胺基）Mg（II）和Zn（II）配合物作为通过“活化单体”机理进行环酯开环聚合的催化剂
MgBu的反应2和ZnEt 2或Zn {N [硅（CH 3）3 ] 2 } 2与三齿单阴离子pyrrolylpyridiylimino [N -，N，N]前配体，得到均配型物种，专用产品，以高产率。通过1D和2D NMR分析以及单晶X射线晶体学对溶液中的络合物进行表征。在外源醇的存在下，在ε-己内酯和丙交酯的聚合反应中测试了新的均化络合物作为引发剂。对于两种配合物，聚合通过 在镁络合物的情况下，这种“活化的单体”机理与配体的配位柔性相关，从而在温和条件下具有极高的生产率。
更新日期：2017-09-20
中文翻译：
新型均衡双（吡咯基吡啶基亚胺基）Mg（II）和Zn（II）配合物作为通过“活化单体”机理进行环酯开环聚合的催化剂
MgBu的反应2和ZnEt 2或Zn {N [硅（CH 3）3 ] 2 } 2与三齿单阴离子pyrrolylpyridiylimino [N -，N，N]前配体，得到均配型物种，专用产品，以高产率。通过1D和2D NMR分析以及单晶X射线晶体学对溶液中的络合物进行表征。在外源醇的存在下，在ε-己内酯和丙交酯的聚合反应中测试了新的均化络合物作为引发剂。对于两种配合物，聚合通过 在镁络合物的情况下，这种“活化的单体”机理与配体的配位柔性相关，从而在温和条件下具有极高的生产率。
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