[angel]

Hi everyone,

I have a question to share with you all.
THis is regarding the reaction between "monohydroxyl PEG" with "allyl bromide" with the help of Sodium Hydride to deprotonize the H atom in the first reactant and then attach the allyl group onto it. Hence, the end results will be named "allyl methyl PEG".
I have done 3 synthesis and it happens that the boiling point of each end product varies.
I am very confused.... can anybody help me to explain the possible side reactions of this synthesis? What is the condition to avoid?
And, what is the consequences of not using inert gas (other than Hydrogen gas flammability) ?

Thank you so much for your kind help