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Preparation and characterization of large ether-ester rings

✍ Scribed by B.R. Wood; J.A. Semlyen; P. Hodge

Publisher
Elsevier Science
Year
1997
Tongue
English
Weight
270 KB
Volume
38
Category
Article
ISSN
0032-3861

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✦ Synopsis

Cyclic oligomers of tetraethyleneglycol succinate [O(CH2CH20)4.CO.(CH2)2.CO]. ,. were prepared by a ring chain reaction. The cyclic products were characterized in full. Cyclic oligomers with up to eight repeat units were fractionated using preparative gel permeation chromatography to give narrow molar mass fractions with polydispersities of 1.03. The fraction consisting of the monomeric ring only was found to crystallize readily, enabling its X-ray crystal structure to be determined. ~i:

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