Ethylene glycol oligomers

Abstract Pure samples of the oligo(ethylene glycol)s 1a ( n = 30 or 45), were prepared from the monosodium salt ( 1c ) and the ditosylate ( 1b ) of pentadeca(ethylene glycol). The Melting points of the samples were found to be higher than those of comparable materials prepared hitherto. The melting points of several pure oligo(ethylene glycol)s in the range n = 9 to 45, deriving from this and earlier work, were compared with those of commercially available poly(ethylene glycol)s of similar average chain lengths.