The synthesis and characterisation of a magnesium amine bis(phenolate) complex as a potential initiator for the ring-opening polymerisation of cyclic esters

Matthew G. Davidson; Matthew D. Jones; Decheng Meng; Charles T. O'Hara

doi:10.1080/10241220600746483

The synthesis and characterisation of a magnesium amine bis(phenolate) complex as a potential initiator for the ring-opening polymerisation of cyclic esters

Matthew G. Davidson, Matthew D. Jones, Decheng Meng, Charles T. O'Hara

Department of Chemistry

University of Bath

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

10 Citations (SciVal)

Abstract

The synthesis, solid-state and solution structure of a magnesium amine bis(phenolate) complex [Mg{(O-2,4-^tBu₂C₆H₂-6-CH₂N(Me)CH₂}₂(C₆H₅CH₃)_1.5]₂ 4-Mg is reported. The complex was prepared by combining MgBu₂ with an equimolar amount of the parent bis(aminophenol) at ambient temperature in toluene. In the solid-state, the complex exists as a dimer. Each Mg centre is five-coordinate-bonding to one μ₁-O, two μ₂-O and two N moieties. NMR spectroscopy indicates that the solid-state structure is maintained in solution. Complex 4-Mg was investigated as a catalyst for ring opening polymerisation (ROP) of ε-caprolactone and L-lactide at both ambient and elevated temperatures, but was shown to be inactive, presumably as a direct result of the high steric bulk of the amine bis(phenolate) ligand.

Original language	English
Pages (from-to)	3-12
Number of pages	10
Journal	Main Group Chemistry
Volume	5
Issue number	1
Early online date	28 Feb 2006
DOIs	https://doi.org/10.1080/10241220600746483
Publication status	Published - 28 Feb 2006

Keywords

caprolactone
lactide
Magnesium
phenolate
ROP

ASJC Scopus subject areas

Organic Chemistry
Inorganic Chemistry
Materials Chemistry

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10.1080/10241220600746483

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title = "The synthesis and characterisation of a magnesium amine bis(phenolate) complex as a potential initiator for the ring-opening polymerisation of cyclic esters",

abstract = "The synthesis, solid-state and solution structure of a magnesium amine bis(phenolate) complex [Mg\{(O-2,4-tBu2C6H2-6-CH2N(Me)CH2\}2(C6H5CH3)1.5]2 4-Mg is reported. The complex was prepared by combining MgBu2 with an equimolar amount of the parent bis(aminophenol) at ambient temperature in toluene. In the solid-state, the complex exists as a dimer. Each Mg centre is five-coordinate-bonding to one μ1-O, two μ2-O and two N moieties. NMR spectroscopy indicates that the solid-state structure is maintained in solution. Complex 4-Mg was investigated as a catalyst for ring opening polymerisation (ROP) of ε-caprolactone and L-lactide at both ambient and elevated temperatures, but was shown to be inactive, presumably as a direct result of the high steric bulk of the amine bis(phenolate) ligand.",

keywords = "caprolactone, lactide, Magnesium, phenolate, ROP",

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T1 - The synthesis and characterisation of a magnesium amine bis(phenolate) complex as a potential initiator for the ring-opening polymerisation of cyclic esters

AU - Davidson, Matthew G.

AU - Jones, Matthew D.

AU - Meng, Decheng

AU - O'Hara, Charles T.

PY - 2006/2/28

Y1 - 2006/2/28

N2 - The synthesis, solid-state and solution structure of a magnesium amine bis(phenolate) complex [Mg{(O-2,4-tBu2C6H2-6-CH2N(Me)CH2}2(C6H5CH3)1.5]2 4-Mg is reported. The complex was prepared by combining MgBu2 with an equimolar amount of the parent bis(aminophenol) at ambient temperature in toluene. In the solid-state, the complex exists as a dimer. Each Mg centre is five-coordinate-bonding to one μ1-O, two μ2-O and two N moieties. NMR spectroscopy indicates that the solid-state structure is maintained in solution. Complex 4-Mg was investigated as a catalyst for ring opening polymerisation (ROP) of ε-caprolactone and L-lactide at both ambient and elevated temperatures, but was shown to be inactive, presumably as a direct result of the high steric bulk of the amine bis(phenolate) ligand.

AB - The synthesis, solid-state and solution structure of a magnesium amine bis(phenolate) complex [Mg{(O-2,4-tBu2C6H2-6-CH2N(Me)CH2}2(C6H5CH3)1.5]2 4-Mg is reported. The complex was prepared by combining MgBu2 with an equimolar amount of the parent bis(aminophenol) at ambient temperature in toluene. In the solid-state, the complex exists as a dimer. Each Mg centre is five-coordinate-bonding to one μ1-O, two μ2-O and two N moieties. NMR spectroscopy indicates that the solid-state structure is maintained in solution. Complex 4-Mg was investigated as a catalyst for ring opening polymerisation (ROP) of ε-caprolactone and L-lactide at both ambient and elevated temperatures, but was shown to be inactive, presumably as a direct result of the high steric bulk of the amine bis(phenolate) ligand.

KW - caprolactone

KW - lactide

KW - Magnesium

KW - phenolate

KW - ROP

UR - https://www.scopus.com/pages/publications/84942597292

U2 - 10.1080/10241220600746483

DO - 10.1080/10241220600746483

M3 - Article

VL - 5

SP - 3

EP - 12

JO - Main Group Chemistry

JF - Main Group Chemistry

IS - 1

ER -

The synthesis and characterisation of a magnesium amine bis(phenolate) complex as a potential initiator for the ring-opening polymerisation of cyclic esters

Abstract

Keywords

ASJC Scopus subject areas

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