chemrox - 11-12-2015 at 16:23
I have a procedure that indicated reaction conditions as Zn in acetic acid. My questions are should Zn powder or mossy Zn be used? and should the
Zn/acetic acid solution be prepared before the reactants are added? This adding an R- alkyl halide onto a small heterocycle if that makes a
difference.
Second a similar procedure calls for "100% aqueous NaOH solution" as the environment. Can this really be done in glass? Has anyone here worked with
100 g NaOH in 100 ml water? Would Na in MeOH or EtOH be as strong a base?
Boffis - 11-12-2015 at 17:31
What is 100% aqueous NaOH? If it's a 100% NaOH how can it be "aqueous" there's no room left for the water. Or am I missing something?
chemrox - 11-12-2015 at 17:45
40g HaOH in 40ml water is "100% aqueous NaOH?" This question has come up many times. Why? Because it is in patents and the patent reviewers seem OK
with it.
I don't like the idea of putting such strong NaOH solutions in borosilicate glass. Maybe this was how silation reax were discovered???I doubt it but I
have no doubt that working the stuff up in glass will generate some NaSiO2.
and weaken my glassware
[Edited on 12-12-2015 by chemrox]