Magnesium Promoted Active and Isoselective ROP of rac ‐Lactide and ϵ‐Caprolactone Under Mild Conditions

Sagar, Shweta and Bano, Kulsum and Sarkar, Alok and Pal, Kuntal and Panda, Tarun K. (2022) Magnesium Promoted Active and Isoselective ROP of rac ‐Lactide and ϵ‐Caprolactone Under Mild Conditions. European Journal of Inorganic Chemistry. ISSN 1434-1948

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Abstract

A novel amidophosphine sulfur-supported magnesium complex, [Ph2P(S)NCH2CH2N−(CH2CH2)O]Mg(C4H9)(THF)] (2) enabling efficient ring-opening polymerization of rac-lactide (LA) and ϵ-caprolactone (CL) is disclosed. Achieved incredible selectivity for ROP of rac-lactide for the first time using a magnesium catalyst affording isoselective PLA with a Pi value of 0.77. The polymerization of rac-LA as well as ϵ-CL proceeded under mild reaction conditions in absence of any external initiator, to yield corresponding polyesters with a great control over the molecular weight. The kinetic studies reveal that both sulfur and magnesium centers simultaneously work together to drive high yield and selectivity. © 2022 Wiley-VCH GmbH.

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IITH Creators:

IITH Creators	ORCiD
Panda, Tarun K	http://orcid.org/0000-0003-0975-0118

Item Type:

Article

Additional Information:

Financial support for this work was given by the Science and Engineering Research Board (SERB), India, under project no. EMR/2016/005150. S.S. and K.B. thank Prime Minister Research Fellowship and CSIR India respectively for their Ph.D. fellowships. We thank the Department of Chemistry, IIT Hyderabad for the equipment facility.

Uncontrolled Keywords:

Magnesium; Magnesium chalcogenide complexes; rac-lactide; Ring-opening polymerization; ϵ-caprolactone

Subjects:

Chemistry

Divisions:

Department of Chemistry

Depositing User:

. LibTrainee 2021

Date Deposited:

13 Oct 2022 13:05

Last Modified:

13 Oct 2022 13:05