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Topic: Synthesis esters of PEG!  (Read 1510 times)

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Offline tuyetchau

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Synthesis esters of PEG!
« on: October 15, 2013, 07:28:43 AM »
Dear all,
I synthesis mono- and di- esters from Stearoyl chloride : PEG 1500 (1:1), I obtained mono- and di- esters compounds, but I met some problems with NMR spectra. There is always a singlet peak which shifts around 1.8 and 2.1 ppm. I do not know what it is. Could you please give me your advice? Thank you very much!
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Offline Archer

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Re: Synthesis esters of PEG!
« Reply #1 on: October 15, 2013, 09:23:38 AM »
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Offline magician4

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Re: Synthesis esters of PEG!
« Reply #2 on: October 15, 2013, 10:08:39 AM »
just a wild guess, but sounds pretty likely to me : water


regards

Ingo
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