Imperial College London

PROFESSOR CHARLOTTE K. WILLIAMS

Faculty of Natural SciencesDepartment of Chemistry

Visiting Professor
 
 
 
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Contact

 

+44 (0)20 7594 5790c.k.williams Website

 
 
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Location

 

317 RCS1ChemistrySouth Kensington Campus

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Summary

 

Publications

Citation

BibTex format

@article{Pankhurst:2019:10.1039/c9dt00595a,
author = {Pankhurst, JR and Paul, S and Zhu, Y and Williams, CK and Love, JB},
doi = {10.1039/c9dt00595a},
journal = {Dalton Trans},
pages = {4887--4893},
title = {Polynuclear alkoxy-zinc complexes of bowl-shaped macrocycles and their use in the copolymerisation of cyclohexene oxide and CO2.},
url = {http://dx.doi.org/10.1039/c9dt00595a},
volume = {48},
year = {2019}
}

RIS format (EndNote, RefMan)

TY  - JOUR
AB - The reactions between alcohols and the tetranuclear ethyl-Zn complexes of an ortho-phenylene-bridged polypyrrole macrocycle, Zn4Et4(L1) 1 and the related anthracenyl-bridged macrocyclic complex, Zn4Et4(THF)4(L2) 2 have been studied. With long-chain alcohols such as n-hexanol, the clean formation of the tetranuclear hexoxide complex Zn4(OC6H13)4(L1) 3 occurs. In contrast, the use of shorter-chain alcohols such as i-propanol results in the trinuclear complex Zn3(μ2-OiPr)2(μ3-OiPr)(HL1) 4 that arises from demetalation; this complex was characterised by X-ray crystallography. The clean formation of these polynuclear zinc clusters allowed a study of their use as catalysts in the ring-opening copolymerisation (ROCOP) reaction between cyclohexene oxide and CO2. In situ reactions involving the pre-catalyst 1 and n-hexanol formed the desired polymer with the best selectivity for polycarbonate (90%) at 30 atm CO2, whilst the activity and performance of pre-catalyst 2 was poor in comparison.
AU - Pankhurst,JR
AU - Paul,S
AU - Zhu,Y
AU - Williams,CK
AU - Love,JB
DO - 10.1039/c9dt00595a
EP - 4893
PY - 2019///
SP - 4887
TI - Polynuclear alkoxy-zinc complexes of bowl-shaped macrocycles and their use in the copolymerisation of cyclohexene oxide and CO2.
T2 - Dalton Trans
UR - http://dx.doi.org/10.1039/c9dt00595a
UR - https://www.ncbi.nlm.nih.gov/pubmed/30896006
VL - 48
ER -