Cyclic polyethers
1995; Elsevier BV; Volume: 36; Issue: 19 Linguagem: Inglês
10.1016/0032-3861(95)93783-i
ISSN1873-2291
AutoresTao Lin Sun, Ga‐Er Yu, Colin Price, Colin Booth, J. W. Cooke, Anthony J. Ryan,
Tópico(s)Inorganic and Organometallic Chemistry
ResumoA range of cyclic poly(oxyethylene)s, (OCH2CH2)m, with m in the range 23–68, corresponding to rings of 69–204 chain atoms, have been prepared by a modified tosylation method that gave c. 75 wt% yields. Gel permeation chromatography and nuclear magnetic resonance were used to monitor the cyclization and purification procedures. Small-angle X-ray studies provided a useful method of characterizing the average molar mass of the cyclics.
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