Aluminum complexes of mono-pyrrolidine ligands for the con-trolled ring opening polymerization of lactide

James Beament; Mary Mahon; Antoine Buchard; Matthew Jones

doi:10.1021/acs.organomet.8b00161

Aluminum complexes of mono-pyrrolidine ligands for the con-trolled ring opening polymerization of lactide

James Beament, Mary Mahon, Antoine Buchard, Matthew Jones

Chemistry

Research output: Contribution to journal › Article › peer-review

Abstract

In this paper we report the full characterization (solution-state NMR spectroscopy and solid-state structures) of a series of Al(III) half-salan complexes and their exploitation for the ring-opening polymerization of rac-lactide. Depending on the ligand employed and stoichiometry of the complexation, structures of the form Al(X) 2Me or Al(X)Me 2 were isolated. Interestingly Al(2) 2Me and Al(2)Me 2 produce PLA with a strong isotactic bias (P m up to 0.80), whereas all other complexes produced atactic PLA. This is in contrast to recent studies on similar salan ligand systems. PLAs with predictable molecular weights and narrow distributions were achieved. The results are discussed in terms of steric and electronic properties of the ligands.

Original language	English
Pages (from-to)	1719-1724
Number of pages	6
Journal	Organometallics
Volume	37
Issue number	11
DOIs	https://doi.org/10.1021/acs.organomet.8b00161
Publication status	Published - 11 Jun 2018

Access to Document

10.1021/acs.organomet.8b00161

Cite this

@article{5629b2dd3e994331b20792bf9714d7be,

title = "Aluminum complexes of mono-pyrrolidine ligands for the con-trolled ring opening polymerization of lactide",

abstract = "In this paper we report the full characterization (solution-state NMR spectroscopy and solid-state structures) of a series of Al(III) half-salan complexes and their exploitation for the ring-opening polymerization of rac-lactide. Depending on the ligand employed and stoichiometry of the complexation, structures of the form Al(X) 2Me or Al(X)Me 2 were isolated. Interestingly Al(2) 2Me and Al(2)Me 2 produce PLA with a strong isotactic bias (P m up to 0.80), whereas all other complexes produced atactic PLA. This is in contrast to recent studies on similar salan ligand systems. PLAs with predictable molecular weights and narrow distributions were achieved. The results are discussed in terms of steric and electronic properties of the ligands.",

author = "James Beament and Mary Mahon and Antoine Buchard and Matthew Jones",

year = "2018",

month = jun,

day = "11",

doi = "10.1021/acs.organomet.8b00161",

language = "English",

volume = "37",

pages = "1719--1724",

journal = "Organometallics",

issn = "0276-7333",

publisher = "American Chemical Society",

number = "11",

}

TY - JOUR

T1 - Aluminum complexes of mono-pyrrolidine ligands for the con-trolled ring opening polymerization of lactide

AU - Beament, James

AU - Mahon, Mary

AU - Buchard, Antoine

AU - Jones, Matthew

PY - 2018/6/11

Y1 - 2018/6/11

N2 - In this paper we report the full characterization (solution-state NMR spectroscopy and solid-state structures) of a series of Al(III) half-salan complexes and their exploitation for the ring-opening polymerization of rac-lactide. Depending on the ligand employed and stoichiometry of the complexation, structures of the form Al(X) 2Me or Al(X)Me 2 were isolated. Interestingly Al(2) 2Me and Al(2)Me 2 produce PLA with a strong isotactic bias (P m up to 0.80), whereas all other complexes produced atactic PLA. This is in contrast to recent studies on similar salan ligand systems. PLAs with predictable molecular weights and narrow distributions were achieved. The results are discussed in terms of steric and electronic properties of the ligands.

AB - In this paper we report the full characterization (solution-state NMR spectroscopy and solid-state structures) of a series of Al(III) half-salan complexes and their exploitation for the ring-opening polymerization of rac-lactide. Depending on the ligand employed and stoichiometry of the complexation, structures of the form Al(X) 2Me or Al(X)Me 2 were isolated. Interestingly Al(2) 2Me and Al(2)Me 2 produce PLA with a strong isotactic bias (P m up to 0.80), whereas all other complexes produced atactic PLA. This is in contrast to recent studies on similar salan ligand systems. PLAs with predictable molecular weights and narrow distributions were achieved. The results are discussed in terms of steric and electronic properties of the ligands.

U2 - 10.1021/acs.organomet.8b00161

DO - 10.1021/acs.organomet.8b00161

M3 - Article

SN - 0276-7333

VL - 37

SP - 1719

EP - 1724

JO - Organometallics

JF - Organometallics

IS - 11

ER -